ARUV100LT3 - Air-conditioner LG - Free user manual and instructions

USER MANUAL ARUV100LT3 LG

• Please read this installation manual completely before installing the product.
  • Installation work must be performed in accordance with the national wiring standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it thoroughly.your set and retain it for future reference.

MULTI V™

MODELS : ARUN Series

ARUV

Series

TABLE OF CONTENTS

Safety Precautions....3

Installation Process ....7

Outdoor units Information......8

Environment-friendly Alternative Refrigerant R410A 14

Select the Best Location ....14

Installation Space....15

Lifting method....17

Installation ....18

Refrigerant piping installation....23

Pipe connections between indoor and outdoor unit....27

Electrical Wiring ....53

Test Run 85

New Function ....111

Caution For Refrigerant Leak....120

Installation guide at the seaside....122

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

WARNING

This symbol indicates the possibility of death or serious injury.

CAUTION

This symbol indicates the possibility of injury or damage to properties only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

WARNING

■ Installation

Have all electric work done by a licensed electrician according to "Electric Facility Engineering Standard" and "Interior Wire Regulations" and the instructions given in this manual and always use a special circuit.

- If the power source capacity is inadequate or electric work is performed improperly, electric shock or fire may result.

Ask the dealer or an authorized technician to install the air conditioner.

- Improper installation by the user may result in water leakage, electric shock, or fire.

Always ground the product.

- There is risk of fire or electric shock.

Always install a dedicated circuit and breaker.

- Improper wiring or installation may cause fire or electric shock.

For re-installation of the installed product, always contact a dealer or an Authorized Service Center.

Do not install, remove, or re-install the unit by yourself (customer).

- There is risk of fire, electric shock, explosion, or injury.

- There is risk of fire, electric shock, explosion, or injury.

Do not store or use flammable gas or combustibles near the air conditioner.

Use the correctly rated breaker or fuse.

- There is risk of fire or failure of product.

- There is risk of fire or electric shock.

Prepare for strong wind or earthquake and install the unit at the specified place.

Do not install the product on a defective installation stand.

- Improper installation may cause the unit to topple and result in injury.

- It may cause injury, accident, or damage to the product.

When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

Ventilate before operating air conditioner when gas leaked out.

- It may cause explosion, fire, and burn.

If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

- Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.

Do not reconstruct to change the settings of the protection devices.

- If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by LGE are used, fire or explosion may result.

Securely install the cover of control box and the panel.

- If the cover and panel are not installed securely, dust or water may enter the outdoor unit and fire or electric shock may result.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

Operation

Do not damage or use an unspecified power cord.

- There is risk of fire, electric shock, explosion, or injury.

Be cautious that water could not enter the product.

- There is risk of fire, electric shock, or product damage.

When the product is soaked (flooded or submerged), contact an Authorized Service Center.

- There is risk of fire or electric shock.

Take care to ensure that nobody could step on or fall onto the outdoor unit.

- This could result in personal injury and product damage.

Use a dedicated outlet for this appliance.

- There is risk of fire or electrical shock.

Do not touch the power switch with wet hands.

- There is risk of fire, electric shock, explosion, or injury.

Be cautious not to touch the sharp edges when installing.

- It may cause injury.

Do not open the inlet grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

- There is risk of physical injury, electric shock, or product failure.

CAUTION

■Installation

Always check for gas (refrigerant) leakage after installation or repair of product.

- Low refrigerant levels may cause failure of product.

Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Use power cables of sufficient current carrying capacity and rating.

- Cables that are too small may leak, generate heat, and cause a fire.

Keep the unit away from children. The heat exchanger is very sharp.

- It can cause the injury, such as cutting the finger. Also the damaged fin may result in degradation of capacity.

Do not install the unit where combustible gas may leak.

- If the gas leaks and accumulates around the unit, an explosion may result.

Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.

- There is risk of damage or loss of property.

When installing the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

- The inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.

Do not install the product where it is exposed to sea wind (salt spray) directly.

- It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

Operation

Do not use the air conditioner in special environments.

- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.

Make the connections securely so that the outside force of the cable may not be applied to the terminals.

- Inadequate connection and fastening may generate heat and cause a fire.

Do not block the inlet or outlet.

- It may cause failure of appliance or accident.

Be sure the installation area does not deteriorate with age.

- If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or personal injury.

Install and insulate the drain hose to ensure that water is drained away properly based on the installation manual.

- A bad connection may cause water leakage.

Be very careful about product transportation.

• Only one person should not carry the product if it weighs more than 20 kg.
• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fingers.
• When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also support the outdoor unit at four points so that it cannot slip sideways.

Safely dispose of the packing materials.

• Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.
• Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.

Do not touch any of the refrigerant piping during and after operation.

- It can cause a burn or frostbite.

Do not directly turn off the main power switch after stopping operation.

- Wait at least 5 minutes before turning off the main power switch. Otherwise it may result in water leakage or other problems.

Use a firm stool or ladder when cleaning or maintaining the air conditioner.

- Be careful and avoid personal injury.

Turn on the power at least 6 hours before starting operation.

- Starting operation immediately after turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.

Do not operate the air conditioner with the panels or guards removed.

- Rotating, hot, or high-voltage parts can cause injuries.

Auto-addressing should be done in condition of connecting the power of all indoor and outdoor units. Auto-addressing should also be done in case of changing the indoor unit PCB.

Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in.

- There are sharp and moving parts that could cause personal injury.

Installation Process

graph TD
    A["Determination of division work"] --> B["Preparation of contract drawings"]
    B --> C["Sleeve and insert work"]
    C --> D["Installation of indoor unit"]
    D --> E["Refrigerant piping work"]
    E --> F["Drain pipe work"]
    F --> G["Duct work"]
    G --> H["Heat insulation work"]
    H --> I["Electrical work (connection circuits and drive circuits)"]
    I --> J["Airtight test"]
    J --> K["Vacuum drying"]
    K --> L["Additional charge of refrigerant"]
    L --> M["Fit facing panels"]
    M --> N["Automatic addressing of indoor unit"]
    N --> O["Test run adjustment"]
    O --> P["Transfer to customer with explanation"]

    C --> Q["Take account of gradient of drain piping"]
    D --> R["Check model name to make sure the fitting is made correctly"]
    E --> S["Special attention to dryness, cleanness and tightness"]
    F --> T["Adjust to downward gradient"]
    G --> U["Make sure airflow is sufficient"]
    H --> V["Make sure no gaps are left where the insulating materials are joined"]
    I --> W["Multiple core cable must not be used. (suitable cable should be selected)"]

    Q --> X["Outdoor unit foundation work"]
    R --> X
    X --> Y["Installation of outdoor unit"]
    Y --> Z["Avoid short circuits and ensure sufficient space is allowed for service"]

    J --> AA["In the final check for 24 hours at 3.8 MPa(38.7 kgf/cm²) there must be no drop in pressure."]
    K --> AB["The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour"]
    L --> AC["Recharge correctly as calculated in this manual. and record the amount of added refrigerant"]
    M --> AD["Make sure there are no gaps left between the facing materials used on the ceiling"]
    N --> AE["Refer to automatic addressing flowchart<br>Preheat the crank case with the electrical heater for more than 6 hours."]
    O --> AF["Run each indoor unit in turn to make sure the pipe work has been fitted correctly"]
    P --> AG["Explain the use of the system as clearly as possible to your customer and make sure all relevant documentation is in order"]

CAUTION

• The above list indicates the order in which the individual work operations are normally carried out but this order may be varied where local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa .
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)

Outdoor units Information

CAUTION

■ Combination Ration(50\~200%)

Outdoor Number	Connection Capacity
Single outdoor units	200%
Double outdoor units	160%
Triple outdoor units	130%

Notes: * We can guarantee the operation only within 130% Combination. If you want to connect more than 130% combination, please contact us and discuss the requirement like below.

1) If the operation of indoor unit is more than 130%, the airflow is operated as low in the all indoor units.
2) The number of () means the number of Max. connectable indoor units, when the connected capacity of indoor units is in the table above.

Power Supply: Outdoor Unit (30, 380 - 415V, 50Hz/30, 380V, 60Hz)

Heat pump

Unit		1 Outdoor unit
System(HP)		8	10	12
Model		ARUN80LN3	ARUN100LN3	ARUN120LN3
		ARUN80LN3	ARUN100LN3	ARUN120LN3
Product Charge	kg	5.0	6.4	6.4
Max. Connectable No. of Indoor Units		13(20)	16(25)	20(30)
Net Weight	kg	190 x 1	240 x 1	240 x 1
	Ibs	418 x 1	529 x 1	529 x 1
Dimensions (WxHxD)	mm	(920 x 1,680 x 760) x 1	(920 x 1,680 x 760) x 1	(920 x 1,680 x 760) x 1
	inch	(36.2 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	9.52(3/8)	9.52(3/8)	12.7(1/2)
	Gas Pipes[mm(inch)]	19.05(3/4)	22.2(7/8)	28.58(1 1/8)

Unit		1 Outdoor Unit
System(HP)		14	16	18	20
Model		ARUN140LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
		ARUN140LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
Product Charge	kg	7.0	7.0	7.5	9.0
Max. Connectable No. of Indoor Units		23(35)	26(40)	29(45)	32(44)
Net Weight	kg	260 x 1	260 x 1	315 x 1	325 x 1
	Ibs	573 x 1	573 x 1	694 x 1	716 x 1
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1
	inch	(48.8 x 66.1 x 29.9) x 1	(48.8 x 66.1 x 29.9) x 1	(48.8 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	12.7(1/2)	12.7(1/2)	15.88(5/8)	15.88(5/8)
	Gas Pipes[mm(inch)]	28.58(1 1/8)	28.58(1 1/8)	28.58(1 1/8)	28.58(1 1/8)
Unit		2 Outdoor Unit
System(HP)		22	24	26	28
Model		ARUN220LN3	ARUN240LN3	ARUN260LN3	ARUN280LN3
		ARUN120LN3	ARUN120LN3	ARUN140LN3	ARUN160LN3
		ARUN100LN3	ARUN120LN3	ARUN120LN3	ARUN120LN3
Product Charge	kg	12.8	12.8	13.4	13.4
Max. Connectable No. of Indoor Units		35(44)	39(48)	42(52)	45(56)
Net Weight	kg	240 x 2	240 x 2	240 x 1 + 260 x 1	240 x 1 + 260 x 1
	Ibs	529 x 2	529 x 2	529 x 1 + 573 x 1	529 x 1 + 573 x 1
Dimensions (WxHxD)	mm	(920 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 1(1,240 x 1,680 x 760) x 1	(920 x 1,680 x 760) x 1)(1,240 x 1,680 x 760) x 1
	inch	(36.2 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 1(48.8 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1(48.8 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	15.88(5/8)	15.88(5/8)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	28.58(1 1/8)	34.9(1 3/8)	34.9(1 3/8)	34.9(1 3/8)

Unit		2 Outdoor Unit
System(HP)		30	32	34	36
Model		ARUN300LN3	ARUN320LN3	ARUN340LN3	ARUN360LN3
		ARUN160LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
		ARUN140LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
Product Charge	kg	14.0	14.0	14.5	16.0
Max. Connectable No. of Indoor Units		49(60)	52(64)	55(64)	58(64)
Net Weight	kg	260 x 2	260 x 2	260 x 1 + 315 x 1	260 x 1 + 325 x 1
	Ibs	573 x 2	573 x 2	573 x 1 + 694 x 1	573 x 1 + 716 x 1
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 2
	inch	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 2
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	34.9(1 3/8)	34.9(1 3/8)	34.9(1 3/8)	41.3(1 5/8)

Unit		2 Outdoor Unit 3 Outdoor Unit
System(HP)		38	40	42	44
Model		ARUN380LN3	ARUN400LN3	ARUN420LN3	ARUN440LN3
		ARUN200LN3	ARUN200LN3	ARUN160LN3	ARUN160LN3
		ARUN180LN3	ARUN200LN3	ARUN140LN3	ARUN160LN3
				ARUN120LN3	ARUN120LN3
Product Charge	kg	16.5	18.0	20.4	20.4
Max. Connectable No. of Indoor Units		61(64)	64	64	64
Net Weight	kg	315 x 1 + 325 x 1	325 x 2	240 x 1 + 260 x 2	240 x 1 + 260 x 2
	Ibs	694 x 1 + 716 x 1	716 x 2	529 x 1 + 573 x 2	529 x 1 + 573 x 2
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 1(1,240 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 1(1,240 x 1,680 x 760) x 2
	inch	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 1(48.8 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 1(48.8 x 66.1 x 29.9) x 2
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)

Unit		3 Outdoor Unit
System(HP)		46	48	50	52
Model		ARUN460LN3	ARUN480LN3	ARUN500LN3	ARUN520LN3
		ARUN160LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
		ARUN160LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
		ARUN140LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
Product Charge	kg	21.0	21.0	21.5	23.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	260 x 3	260 x 3	260 x 2 + 315 x 1	260 x 2 + 325 x 1
	Ibs	573 x 3	573 x 3	573 x 2 + 694 x 1	573 x 2 + 716 x 1
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 3	(1,240 x 1,680 x 760) x 3	(1,240 x 1,680 x 760) x 3	(1,240 x 1,680 x 760) x 3
	inch	(48.8 x 66.1 x 29.9) x 3	(48.8 x 66.1 x 29.9) x 3	(48.8 x 66.1 x 29.9) x 3	(48.8 x 66.1 x 29.9) x 3
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)

Outdoor Units Information

Unit		3 Outdoor Unit
System(HP)		54	56	58	60
Model		ARUN540LN3	ARUN560LN3	ARUN580LN3	ARUN600LN3
		ARUN200LN3	ARUN200LN3	ARUN200LN3	ARUN200LN3
		ARUN200LN3	ARUN200LN3	ARUN200LN3	ARUN200LN3
		ARUN140LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
Product Charge	kg	25.0	25.0	25.5	27.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	260 × 1 + 325 × 2	260 × 1 + 325 × 2	315 × 1 + 325 × 2	325 × 3
	Ibs	573 × 1 + 716 × 2	573 × 1 + 716 × 2	694 × 1 + 716 × 2	716 × 3
Dimensions (WxHxD)	mm	(1,240 × 1,680 × 760) × 3	(1,240 × 1,680 × 760) × 3	(1,240 × 1,680 × 760) × 3	(1,240 × 1,680 × 760) × 3
	inch	(48.8 × 66.1 × 29.9) × 3	(48.8 × 66.1 × 29.9) × 3	(48.8 × 66.1 × 29.9) × 3	(48.8 × 66.1 × 29.9) × 3
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)

Unit		4 Outdoor Unit
System(HP)		62	64	66	68
Model		ARUN620LN3	ARUN640LN3	ARUN660LN3	ARUN680LN3
		ARUN160LN3	ARUN160LN3	ARUN180LN3	ARUN180LN3
		ARUN160LN3	ARUN160LN3	ARUN160LN3	ARUN180LN3
		ARUN160LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
		ARUN140LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
Product Charge	kg	28.0	28.0	28.5	29.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	260 x 4	260 x 4	260 x 3 + 315 x 1	260x2 + 315x2
	Ibs	573 x 4	573 x 4	573 x 3 + 694 x 1	573x2 + 694x2
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 4	(1,240 x 1,680 x 760) x 4	(1,240 x 1,680 x 760) x 4	(1,240 x 1,680 x 760) x 4
	inch	(48.8 x 66.1 x 29.9) x 4	(48.8 x 66.1 x 29.9) x 4	(48.8 x 66.1 x 29.9) x 4	(48.8 x 66.1 x 29.9) x 4
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	44.5(1 3/4)	44.5(1 3/4)	53.98(2)	53.98(2)

Unit		4 Outdoor Unit
System(HP)		70	72	74	76
Model		ARUN700LN3	ARUN720LN3	ARUN740LN3	ARUN760LN3
		ARUN200LN3	ARUN200LN3	ARUN200LN3	ARUN200LN3
		ARUN180LN3	ARUN200LN3	ARUN200LN3	ARUN200LN3
		ARUN160LN3	ARUN160LN3	ARUN180LN3	ARUN200LN3
		ARUN160LN3	ARUN160LN3	ARUN160LN3	ARUN160LN3
Product Charge	kg	30.5	32.0	32.5	34.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	260 × 2 + 315 × 1 + 325 × 1	260 × 2 + 325 × 2	260 × 1 + 315 × 1 + 325 × 2	260 × 1 + 325 × 3
	Ibs	573 × 2 + 694 × 1 + 716 × 1	573 × 2 + 716 × 2	573 × 1 + 694 × 1 + 716 × 2	573 × 1 + 716 × 3
Dimensions (WxHxD)	mm	(1,240 × 1,680 × 760) × 4	(1,240 × 1,680 × 760) × 4	(1,240 × 1,680 × 760) × 4	(1,240 × 1,680 × 760) × 4
	inch	(48.8 × 66.1 × 29.9) × 4	(48.8 × 66.1 × 29.9) × 4	(48.8 × 66.1 × 29.9) × 4	(48.8 × 66.1 × 29.9) × 4
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	53.98(2)	53.98(2)	53.98(2)	53.98(2)

Unit		4 Outdoor Unit
System(HP)		78	80
Model		ARUN780LN3	ARUN800LN3
		ARUN200LN3	ARUN200LN3
		ARUN200LN3	ARUN200LN3
		ARUN200LN3	ARUN200LN3
		ARUN180LN3	ARUN200LN3
Product Charge	kg	34.5	36.0
Max. Connectable No. of Indoor Units		64	64
Net Weight	kg	315 × 1 + 325 × 3	325 × 4
	Ibs	694 × 1 + 716 × 3	716 × 4
Dimensions (WxHxD)	mm	(1,240 × 1,680 × 760) × 4	(1,240 × 1,680 × 760) × 4
	inch	(48.8 × 66.1 × 29.9) × 4	(48.8 × 66.1 × 29.9) × 4
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	53.98(2)	53.98(2)

■ Cooling Only

Unit		1 Outdoor unit
System(HP)		6	8	10	12
Model		ARUV60LT3	ARUV80LT3	ARUV100LT3	ARUV120LT3
		ARUV60LT3	ARUV80LT3	ARUV100LT3	ARUV120LT3
Product Charge	kg	4.0	4.0	6.4	6.4
Max. Connectable No. of Indoor Units		10(12)	13(20)	16(25)	20(30)
Net Weight	kg	155 x 1	155 x 1	185 x 1	235 x 1
	Ibs	341 x 1	341 x 1	408 x 1	518 x 1
Dimensions (WxHxD)	mm	(620 x 1,680 x 760) x 1	(620 x 1,680 x 760) x 1	(920 x 1,680 x 760) x 1	(920 x 1,680 x 760) x 1
	inch	(24.4 x 66.1 x 29.9) x 1	(24.4 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1	(36.2 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	9.52(3/8)	9.52(3/8)	9.52(3/8)	12.7(1/2)
	Gas Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	22.2(7/8)	28.58(1 1/8)

Unit		1 Outdoor Unit
System(HP)		14	16	18	20
Model		ARUV140LT3	ARUV160LT3	ARUV180LT3	ARUV200LT3
		ARUV140LT3	ARUV160LT3	ARUV180LT3	ARUV200LT3
Product Charge	kg	6.4	7.0	7.5	9.0
Max. Connectable No. of Indoor Units		23(35)	26(40)	29(45)	32(44)
Net Weight	kg	235 x 1	255 x 1	310 x 1	310 x 1
	Ibs	518 x 1	562 x 1	683 x 1	683 x 1
Dimensions (WxHxD)	mm	(920 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1	(1,240 x 1,680 x 760) x 1
	inch	(36.2 x 66.1 x 29.9) x 1	(48.8 x 66.1 x 29.9) x 1	(48.8 x 66.1 x 29.9) x 1	(48.8 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	12.7(1/2)	12.7(1/2)	15.88(5/8)	15.88(5/8)
	Gas Pipes[mm(inch)]	28.58(1 1/8)	28.58(1 1/8)	28.58(1 1/8)	28.58(1 1/8)

Unit		2 Outdoor Unit
System(HP)		22	24	26	28
Model		ARUV220LT3	ARUV240LT3	ARUV260LT3	ARUV280LT3
		ARUV120LT3	ARUV140LT3	ARUV140LT3	ARUV140LT3
		ARUV100LT3	ARUV100LT3	ARUV120LT3	ARUV140LT3
Product Charge	kg	12.8	12.8	12.8	12.8
Max. Connectable No. of Indoor Units		35(44)	39(48)	42(52)	45(56)
Net Weight	kg	185 x 1 + 235 x 1	185 x 1 + 235 x 1	235 x 2	235 x 2
	Ibs	408 x 1 + 518 x 1	408 x 1 + 518 x 1	518 x 2	518 x 2
Dimensions (WxHxD)	mm	(920 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 2	(920 x 1,680 x 760) x 2
	inch	(36.2 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 2	(36.2 x 66.1 x 29.9) x 2
Connecting Pipes	Liquid Pipes[mm(inch)]	15.88(5/8)	15.88(5/8)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	28.58(1 1/8)	34.9(1 3/8)	34.9(1 3/8)	34.9(1 3/8)

Unit		2 Outdoor Unit
System(HP)		30	32	34	36
Model		ARUV300LT3	ARUV320LT3	ARUV340LT3	ARUV360LT3
		ARUV160LT3	ARUV180LT3	ARUV200LT3	ARUV200LT3
		ARUV140LT3	ARUV140LT3	ARUV140LT3	ARUV160LT3
Product Charge	kg	13.4	13.9	15.4	16.0
Max. Connectable No. of Indoor Units		49(60)	52(64)	55(64)	58(64)
Net Weight	kg	235 × 1 + 255 × 1	235 × 1 + 310 × 1	235 × 1 + 310 × 1	255 × 1 + 310 × 1
	Ibs	518 × 1 + 562 × 1	518 × 1 + 683 × 1	518 × 1 + 683 × 1	562 × 1 + 683 × 1
Dimensions (WxHxD)	mm	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 1	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 1	(920 × 1,680 × 760) × 1 (1,240 × 1,680 ×760) × 1	(1,240 × 1,680 × 760) × 2
	inch	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 1	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 1	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 39.9) × 1	(48.8 × 66.1 × 29.9) × 2
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	34.9(1 3/8)	34.9(1 3/8)	34.9(1 3/8)	41.3(1 5/8)

Outdoor Units Information

Unit		2 Outdoor Unit 3 Outdoor Unit
System(HP)		38	40	42	44
Model		ARUV380LT3	ARUV400LT3	ARUV420LT3	ARUV440LT3
		ARUV200LT3	ARUV200LT3	ARUV140LT3	ARUV160LT3
		ARUV180LT3	ARUV200LT3	ARUV140LT3	ARUV140LT3
				ARUV140LT3	ARUV140LT3
Product Charge	kg	16.5	18.0	19.2	19.8
Max. Connectable No. of Indoor Units		61(64)	64	64	64
Net Weight	kg	310 x 2	310 x 2	235 x 3	235 x 2 + 255 x 1
	Ibs	683 x 2	683 x 2	518 x 3	518 x 2 + 562 x 1
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 2	(1,240 x 1,680 x 760) x 3	(920 x 1,680 x 760) x 2(1,240 x 1,680 x 760) x 1
	inch	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 2	(48.8 x 66.1 x 29.9) x 3	(36.2 x 66.1 x 29.9) x 2(48.8 x 66.1 x 29.9) x 1
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)

Unit		3 Outdoor Unit
System(HP)		46	48	50	52
Model		ARUV460LT3	ARUV480LT3	ARUV500LT3	ARUV520LT3
		ARUV180LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV140LT3	ARUV140LT3	ARUV160LT3	ARUV180LT3
		ARUV140LT3	ARUV140LT3	ARUV140LT3	ARUV140LT3
Product Charge	kg	20.3	21.8	22.4	22.9
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	235 × 2 + 310 × 1	235 × 2 + 310 × 1	235 × 1 + 255 × 1 + 310 × 1	235 × 1 + 310 × 2
	Ibs	518 × 2 + 683 × 1	518 × 2 + 683 × 1	518 × 1 + 562 × 1 + 683 × 1	518 × 1 + 683 × 2
Dimensions (WxHxD)	mm	(920 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 1	(920 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 1	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 2	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 2
	inch	(36.2 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 1	(36.2 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 1	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 2	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 2
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)

Unit		3 Outdoor Unit
System(HP)		54	56	58	60
Model		ARUV540LT3	ARUV560LT3	ARUV580LT3	ARUV600LT3
		ARUV200LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV200LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV140LT3	ARUV160LT3	ARUV180LT3	ARUV200LT3
Product Charge	kg	24.4	25.0	25.5	27.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	235 × 1 + 310 × 2	255 × 1 + 310 × 2	310 × 3	310 × 3
	Ibs	518 × 1 + 683 × 2	562 × 1 + 683 × 2	683 × 3	683 × 3
Dimensions (WxHxD)	mm	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 2	(1,240 × 1,680 × 760) × 3	(1,240 × 1,680 × 760) × 3	(1,240 × 1,680 × 760) × 3
	inch	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 2	(48.8 × 66.1 × 29.9) × 3	(48.8 × 66.1 × 29.9) × 3	(48.8 × 66.1 × 29.9) × 3
Connecting Pipes	Liquid Pipes[mm(inch)]	19.05(3/4)	19.05(3/4)	19.05(3/4)	19.05(3/4)
	Gas Pipes[mm(inch)]	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)	41.3(1 5/8)
Unit		4 Outdoor Unit
System(HP)		62	64	66	68
Model		ARUV620LT3	ARUV640LT3	ARUV660LT3	ARUV680LT3
		ARUV200LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV140LT3	ARUV160LT3	ARUV180LT3	ARUV200LT3
		ARUV140LT3	ARUV140LT3	ARUV140LT3	ARUV140LT3
		ARUV140LT3	ARUV140LT3	ARUV140LT3	ARUV140LT3
Product Charge	kg	28.2	28.8	29.3	30.8
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	235 × 3 + 310 × 1	235 × 2 + 255 × 1 + 310 × 1	235 × 2 + 310 × 2	235 × 2 + 310 × 2
	Ibs	518 × 3 + 683 × 1	518 × 2 + 562 × 1 + 683 × 1	518 × 2 + 683 × 2	518 × 2 + 683 × 2
Dimensions (WxHxD)	mm	(920 × 1,680 × 760) × 3 (1,240 × 1,680 × 760) × 1	(920 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 2	(920 × 1,680 × 760) × 2 (1,240 × 1,680 × 760) × 2	(920 × 1,680 × 760) × 2 (1,240 × 1,680 x 760) × 2
	inch	(36.2 × 66.1 × 29.9) × 3 (48.8 × 66.1 × 29.9) × 1	(36.2 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 2	(36.2 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 2	(36.2 × 66.1 × 29.9) × 2 (48.8 × 66.1 × 29.9) × 2
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	44.5(1 3/4)	44.5(1 3/4)	53.98(2)	53.98(2)

Unit		4 Outdoor Unit
System(HP)		70	72	74	76
Model		ARUV700LT3	ARUV720LT3	ARUV740LT3	ARUV760LT3
		ARUV200LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV200LT3	ARUV200LT3	ARUV200LT3	ARUV200LT3
		ARUV160LT3	ARUV180LT3	ARUV200LT3	ARUV200LT3
		ARUV140LT3	ARUV140LT3	ARUV140LT3	ARUV160LT3
Product Charge	kg	31.4	31.9	33.4	34.0
Max. Connectable No. of Indoor Units		64	64	64	64
Net Weight	kg	235 × 1 + 255 × 1 + 310 × 2	235 × 1 + 310 × 3	235 × 1 + 310 × 3	255 × 1 + 310 × 3
	Ibs	518 × 1 + 562 × 1 + 683 × 2	518 × 1 + 683 × 3	518 × 1 + 683 × 3	562 × 1 + 683 × 3
Dimensions (WxHxD)	mm	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 3	(920 × 1,680 × 760) × 1 (1,240 × 1,680 × 760) × 3	(920 × 1,680 × 760) × 1 (1,240 × 1,680 ×760) × 3	(1,240 × 1,680 × 760) × 4
	inch	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 3	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 29.9) × 3	(36.2 × 66.1 × 29.9) × 1 (48.8 × 66.1 × 39.9) × 3	(48.8 × 66.1 × 29.9) × 4
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	53.98(2)	53.98(2)	53.98(2)	53.98(2)

Unit		4 Outdoor Unit
System(HP)		78	80
Model		ARUV780LT3	ARUV800LT3
		ARUV200LT3	ARUV200LT3
		ARUV200LT3	ARUV200LT3
		ARUV200LT3	ARUV200LT3
		ARUV180LT3	ARUV200LT3
Product Charge	kg	34.5	36.0
Max. Connectable No. of Indoor Units		64	64
Net Weight	kg	310 x 4	310 x 4
	Ibs	683 x 4	683 x 4
Dimensions (WxHxD)	mm	(1,240 x 1,680 x 760) x 4	(1,240 x 1,680 x 760) x 4
	inch	(48.8 x 66.1 x 29.9) x 4	(48.8 x 66.1 x 29.9) x 4
Connecting Pipes	Liquid Pipes[mm(inch)]	22.2(7/8)	22.2(7/8)
	Gas Pipes[mm(inch)]	53.98(2)	53.98(2)

Environment-friendly Alternative Refrigerant R410A

- The refrigerant R410A has the property of higher operating pressure in comparison with R22.

Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation.

R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.

CAUTION:

• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure 3.8MPa
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state. If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be used.
• Do not heat pipes more than necessary to prevent them from softening.
• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.

Select the Best Location

Select space for installing outdoor unit, which will meet the following conditions:

• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
  • No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and leakage of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.

- Do not use unit under any special environment where oil, steam and sulfuric gas exist.

- It is recommended to fence round the outdoor unit in order to prevent any person or animal from accessing the outdoor unit.

- If installation site is area of heavy snowfall, then the following directions should be observed.

- Make the foundation as high as possible.

- Fit a snow protection hood.

- Select installation location considering following conditions to avoid bad condition when additionally performing defrost operation.

1. Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the product at a place With a high humidity in winter (near beach, coast, lake, etc.)

(Ex : Rooftop where there is always sunshine.)

Installation Space

Individual Installation

During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below.

Category	Installation Space		Case 1(10mm≤Side Space≤49mm)	Case 2(Side Space≥49mm)
4 sides are walls			A≥10B≥300C≥10D≥500	A≥50B≥100C≥50D≥500
			A≥10B≥300C≥10D≥500E≥20	A≥50B≥100C≥50D≥500E≥100
			A≥10B≥300C≥10D≥500E≥20F≥600	A≥50B≥100C≥50D≥500E≥100E≥500
			A≥10B≥300C≥10D≥300E≥20F≥500	A≥50B≥100C≥50D≥100E≥100E≥500
Only 2 sides are walls			A≥10B≥300
			A≥200B≥300E≥400
Limitations on the height of the wall(Refer to 4 side walls)		·The height of the wall on the front side must be 1500mm or less.·The height of the wall on the inlet side must be 500mm or less.·There is no limit to the wall on the side.·If the height of the walls on the front and the side are higher than the limit, there must be additional space on the front and the side.- Additional Space on the inlet side by 1/2 of h1.- Additional Space on the front side by 1/2 of h2-h2 = A(Actual height) - 1500-h1 = B(Actual height) - 500

Seasonal wind and cautions in winter

• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well.
• Get ready for seasonal wind or snow in winter even in other areas.
  • Install a suction and discharge duct not to let in snow or rain.
  • Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.
• Install the outdoor unit at the higher installation console by 50cm than the average snowfall (annual average snowfall) if it is installed at the area with much snowfall.

• Where snow accumulated on the upper part of the Outdoor Unit by more than 10cm, always remove snow for operation.

• The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the product. (If width of the frame is wider than that of the product, snow may accumulate)

• Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.

Lifting method

• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the front and rear.
  • Always lift the unit with ropes attached at four points so that impact is not applied to the unit.
• Attach the ropes to the unit at an angle of 40^ or less.

Locking points for transportation ropes

Weight per Capacity

Chassis	Capacity(HP) Weight(kg)
	Heat Pump Cooling Only Heat Pump Cooling Only
UX1	-6 - 155
	-8 - 155
UX2	8 - 190
	10 10 240 185
	12 12 240 235
	-14 - 235		Fork
UX3	14 - 260
	16 16 260 255
	18 18 315 310
	20 20 325 310

Forklift Carrying Hole

Guide

CAUTION

Be very careful while carrying the product.

• Do not have only one person carry product if it is more than 20 kg.
• PP bands are used to pack some products. Do not use them as a mean for transportation because they are dangerous.
• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging bag may suffocate children to death.
• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make Outdoor Unit unstable, resulting in a fall.
• Use 2 belts of at least 8 ~m long.
• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent damage.
• Hoist the unit making sure it is being lifted at its center of gravity.

Installation

• Install at places where it can endure the weight and vibration/noise of the outdoor unit.
- The outdoor unit supports at the bottom shall have width of at least 100mm under the unit°∅s legs before being fixed.
• The outdoor unit supports should have minimum height of 200mm.
- Anchor bolts must be inserted at least 75mm.

(no text)

For outdoor units of 23kW or above should not be supported only by the corner supports. Outdoor units of 14.5, 16kW can be supported only by the corner supports.

Isometric technical drawing of a multi-chamber industrial cooling unit with heat sinks and cooling fins (no text or labels)

O

At least 100mm At least 100mm At least 100mm At least 100mm Center of the Unit Needed for outdoor units of 23kW or above

Technical line drawing of a heat exchanger unit with cooling fans and cooling fins (no text or symbols)

O

At least 100mm At least 100mm At least 100mm At least 100mm Center of the Unit Needed for outdoor units of 23kW or above

The location of the Anchor bolts

Unit : mm A B 65 At least 65 At least 65 730 760 65 8

Chassis	Outdoor Unit Capacity		A(mm) B(mm)
	H/P C/O
UX1 6~8HP 620 497
UX2 8~12HP 10~14HP 920 792
UX3 14~20HP 16~20HP 1240		1102

Foundation for Installation

• Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.
• Use the H-beam support as a base support
• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad shall be more than 200mm).

At least 200mm A B

Technical diagram of a mechanical assembly with labeled components A through F

Unit : mm 100 75 200 75 200

• The corner part must be fixed firmly. Otherwise, the support for the installation may be bent.
• Get and use M10 Anchor bolt.
• Put Cushion Pad between the outdoor unit and ground support for the vibration protection in wide area.
• Space for pipes and wiring (Pipes and wirings for bottom side)
• H-beam support
• Concrete support

WARNING

• Install where it can sufficiently support the weight of the outdoor unit.
  If the support strength is not enough, the outdoor unit may drop and hurt people.
  • Install where the outdoor unit may not fall in strong wind or earthquake.
  If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.
• Please take extra cautions on the supporting strength of the ground, water outlet treatment(treatment of the water flowing out of the outdoor unit in operation), and the passages of the pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base pan. Use drainage instead for water outlet. The tube or pipe may freeze and the water may not be drained.

WARNING

• Be sure to remove the Pallet(Wood Support) of the bottom side of the outdoor unit Base Pan before fixing the bolt. It may cause the unstable state of the outdoor settlement, and may cause freezing of the heat exchanger resulting in abnormal operations.
• Be sure to remove the Pallet(Wood Support) of the bottom side of the outdoor unit before welding. Not removing Pallet(Wood Support) causes hazard of fire during welding.

Pallet(Wood Support) - Remove before Installation

Preparation of Piping

Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

1) Cut the pipes and the cable.

■ Use the accessory piping kit or the pipes purchased locally.
■ Measure the distance between the indoor and the outdoor unit.
■ Cut the pipes a little longer than measured distance.
■ Cut the cable 1.5m longer than the pipe length.

2) Burrs removal

■ Completely remove all burrs from the cut cross section of pipe/tube.
- Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing.

3) Flaring work

■ Carry out flaring work using flaring tool as shown

Below unit [kW(Btu/h)]	Pipe		"A"
	Gas	Liquid	Gas	Liquid
<5.6(19,100)	1/2"	1/4"	0.5~0.8	0~0.5
<16.0(54,600)	5/8"	3/8"	0.8~1.0	0.5~0.8
<22.4(76,400)	3/4"	3/8"	1.0~1.3	0.5~0.8

Firmly hold copper tube in a bar(or die) as indicated dimension in the table above.

4) Check

■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared section and do flaring work again.

Copper tube 90° Slanted Uneven Rough

Pipe Point down Reamer

Bar "Copper pipe" "A" Handle Yoke Cone Clamp handle Red arrow mark

Smooth all round Inside is shining without scratches. Even length all round = Improper flaring = Inclined Surface damaged Cracked Uneven thickness

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

Precautions when connecting pipes

• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
  • After all the piping has been connected, use nitrogen to perform a gas leak check.

pipe size	tightening torque(Ncm)	A(mm)	flare shape
∅9.5	3270-3990	12.8-13.2
∅12.7	4950-6030	16.2-16.6
∅15.9	6180-7540	19.3-19.7

CAUTION

• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are present.
- When loosening a flare nut, always use two wrenches in combination, When connecting the piping, always use a spanner and torque wrench in combination to tighten the flare nut.
- When connecting a flare nut, coat the flare(inner and outer faces) with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as the initial tightening.

Union

Opening shutoff valve

1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
   Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.

Closing shutoff valve

1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
   * For the tightening torque, refer to the table on the below.

Tightening torque

Shutoff valve size	Tightening torque N-m(Turn clockwise to close)
	Shaft(valve body)		Cap(Valve lid)	Service port Flare nut		Gas line piping attached to unit
∅6.4	5.4-6.6	Hexagonal wrench 4mm	13.5-16.5	11.5-13.9	14-17	-
∅9.5					33-39
∅12.7	8.1-9.9		18-22		50-60
∅15.9	13.5-16.5	Hexagonal wrench 6mm	23-27		62-75
∅22.2	27-33 36-44	Hexagonal wrench 10mm				22-28-
∅25.4

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120^ C).
2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23^ C), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

- Heat insulation material to be prepared... EPDM (Ethylene Propylene Diene Methylene)-over 120^ the heat-resistance temperature.

- Add the insulation over 10mm thickness at high humidity environment.

Fastening band (accessory) Refrigerant piping Thermal insulator (accessory) Indoor unit

Refrigerant piping installation

Precautions on Pipe connection / Valve operation

Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe and the branching parts.

- Use hexagonal wrench to open/close the valve.

Gas pipe Liquid pipe Common pipe

WARNING

• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body if combusted.
- Do not perform welding in a closed space.
- Be sure to close the cap of the service port to prevent gas leakage after the work.

CAUTION

Please block the pipe knock outs of the front and side panels after installing the pipes. (Animals or foreign objects may be brought in to damage the cables.)

High Low Pressure Common Pipe Connections

1. For High Low Pressure Common Pipe, use provided elbows to connect between the outdoor units using pipes.
2. During the cutting of the pipes, remove burr, foreign substances before connecting. Otherwise, the unit may not operate because of the sludge inside the pipe.
3. Apply Nitrogen Gas of pressure until 3.8MPa(38.7kgf/cm²) for work area leakage test.
4. After the degree of a vacuum reaches 5 torr, continue the vacuuming work for more than 1 hour.
5. Open the side pole with hexagonal wrench.

graph TD
    A["Initial structure"] --> B["Installing 2 units"]
    B --> C["Installing 3 units"]
    C --> D["Installing 4 units"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333

When connecting to high low pressure common pipe, connect pipes using connecting elbows.

Detach knock outs according the usages.

Diagram of two identical room layouts with doors, fans, and control panels (no text or symbols)

Detach knock outs according the usages.

Installing on the front side Installing on the side(Limited to high low pressure common pipe)

Connection of Outdoor units

2 outdoor units

[Unit : mm]

Outdoor units Model Gas pipe Liquid pipe
2 Unit		C ARCNN21
3 Unit		B ARCNN31
4 Unit		A ARCNN41

For more information, refer accessory installation manual.

■ Y branch

(A) To outdoor unit
B To branch piping or indoor unit

⑧ Within +/- 10 Viewed from point A

Viewed from point A in direction of arrow

Facing downwards
Facing upwards

1. Use the following materials for refrigerant piping.

2. Material: Seamless phosphorous deoxidized copper pipe

3. Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness.

Outer diameter [mm]	6.35	9.52	12.7	15.88	19.05	22.2	25.4	28.58	31.8	34.9	38.1	41.3	44.45	53.98
Minimum thickness [mm]	0.8	0.8	0.8	0.99	0.99	0.99	0.99	0.99	1.1	1.21	1.35	1.43	1.55	2.1

1. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.
2. Use care to prevent dust, water or other contaminants from entering the piping during installation.
3. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
4. Always use the branch piping set shown below, which are sold separately.

Y branch	Header
	4 branch	7 branch	10 branch
ARBLN01621, ARBLN03321, ARBLN07121, ARBLN14521, ARBLN23220	ARBL054	ARBL057	ARBL1010
	ARBL104	ARBL107	ARBL2010

1. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting section and then use an adapter for connecting different diameters to connect the piping.
2. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and piping diameter). Failure to do so can result in equipment failure or a decline in heating/cooling performance.
3. A second branch cannot be made after a header. (These are shown by ☑.)

graph TD
    subgraph Left_Circuit
        A1["Node"] --> A2["Node"]
        A2 --> A3["Node"]
        A3 --> A4["Node"]
        A4 --> A5["Node"]
        A5 --> A6["Node"]
        A6 --> A7["Node"]
        A7 --> A8["Node"]
        A8 --> A9["Node"]
    end
    subgraph Right_Circuit
        B1["Node"] --> B2["Node"]
        B2 --> B3["Node"]
        B3 --> B4["Node"]
        B4 --> B5["Node"]
        B5 --> B6["Node"]
        B6 --> B7["Node"]
        B7 --> B8["Node"]
        B8 --> B9["Node"]
    end
    style Left_Circuit fill:#f9f,stroke:#333
    style Right_Circuit fill:#bbf,stroke:#333

(A) To Outdoor Unit
B Sealed Piping

1. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.
2. Never perform a pump down. This will not only damage the compressor but also deteriorate the performance.

3. Never use refrigerant to perform an air purge. Always evacuate air by using a vacuum pump.

4. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.

5. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.
6. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
• After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the installation pipe drawing.

Pipe connections between indoor and outdoor unit

• Pipe connections can be done on the front side or on the side according to the installation environments.
• Be sure to let 0.2kgf/cm^2 Nitrogen flow in the pipe when welding.
• If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe and disturb the normal operations of valves and condensers.

Left Side Pipe Draw Out Front Side Pipe Draw Out Right Side Pipe Draw Out

graph LR
    A["Refrigerant Pipe"] --> B["Nitrogen Direction"]
    B --> C["Taping"]
    C --> D["Regulator"]
    D --> E["Valve"]
    E --> F["Nitrogen"]
    style A fill:#f9f,stroke:#333
    style F fill:#ccf,stroke:#333

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.

Removal Area for common pipe bottom side connections. Removal Area for Liquid/Gas pipe bottom side connections.

CAUTION

• Do not give damage to the pipe/base during the Knock Out work.
• Proceed to pipe work after removing burr after Knock Out work.
• Perform sleeve work to prevent damage to the wire when connecting wires using knock Outs.

CAUTION

- Remove the brackets on the inverter condenser legs that were fixed to protect the unit during the transportation. (If bracket is not removed, abnormal noise or vibration may occur.)

Brackets for Transportation

1. Open the front panel.
2. Remove Brackets
3. Fix with only nut and washer as shown in the figure.

■ Remove leakage prevention cap

• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work.
  • Proceed the leakage prevention cap removal as follows:

• Verify whether the liquid/gas/common pipes are locked.

• Extract remaining refrigerant or air inside using the service port.
• Remove the leakage prevention cap

■ Method of pipe cap work during the installation of single outdoor unit

1. Remove rubber cap inserted in the common pipe.
2. Wrap the common pipe service valve with wet towel.
3. Insert the pipe cap provided into the common pipe.
4. Place high/low pressure flare nut cap under the pipe cap so that the pipe cap does not move.
5. Weld the pipe cap.

※ If not wrapped with a wet towel, there may be damages inside the valve.
* If the unit is operated without pipe cap work, there may be abnormality in the cycle caused by refrigerant leakage.

Service Port Liquid pipe Gas pipe Common pipe Leakage Prevention Cap

Pipe Cap Flare Nut

Pipe Drawing Out during Single / Series connection

■ Method of drawing out pipes on the front side

- Proceed with the pipe work as shown in the below figure for front side pipe drawing out.

Common pipe Liquid pipe Gas pipe Pipe Knock Out for Liquid/Gas pipes Pipe Knock Out for common pipes

■ Method of drawing out pipes on the bottom side

① Drawing out common pipe through side panel

Common pipe Liquid pipe Gas pipe Remove only liquid/gas pipe Knock Out Remove Base Pan

② Drawing out common pipe through bottom pipe

Common pipe Liquid pipe Gas pipe

Technical diagram of a piping system with a 'Remove Base Pan' label, showing structural components without any readable text or symbols.

■ Figure of Sides when drawing out through bottom pipe

i) Single outdoor unit ii) Series outdoor units (Draw out common pipes through bottom) iii) Series outdoor units (Draw out common pipes through side panel) Remove Pipe Knock Out Hole

Refrigerant piping system

◆ Y branch method

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch (Y branch)
©: Indoor Units

A H 110m L150m (200 m : Conditional application) I40m (90 m : Conditional application) a b c d e h 15m 2 3 4 5

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch (Y branch)
©: Indoor Units
⑭: Downward Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN21

graph TD
    A["Slave Master"] --> B["Slave Master"]
    B --> C["Slave Master"]
    C --> D["Master"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style D fill:#f9f,stroke:#333
    note1["10m or less"]
    note2["H 110m"]
    note3["L150m (200 m : Conditional application)"]
    note4["i 40m (90 m : Conditional application)"]
    note5["ODU Capacity Master Slave"]
    note6["s"]
    note7["a"]
    note8["b"]
    note9["c"]
    note10["d"]
    note11["e"]
    note12["h15m"]
    note13["C"]
    note14["2"]
    note15["3"]
    note16["4"]
    note17["C"]
    note18["s"]

Piping length from outdoor branch to outdoor unit ≤10m, equivalent length:max 13m (for 22HP or more)

Additional Application

To satisfy below condition to make 40 m \~ 90 m of pipe length after first branch.

1) Diameter of pipes between first branch and the last branch should be increased by one step, except pipe diameter B,C,D is same as Diameter A
6.359.5212.715.8819.0522.225.4^,28.5831.8^,34.938.1^*
* : It is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice. A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m

3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m

4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]

- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m

3 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch (Y branch)
©: Indoor Units
(D): Downward Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN31
⑤ : Connection branch pipe between Outdoor units: ARCNN21

graph TD
    A["Master Slave1"] --> B["Slave2"]
    B --> C["Master Slave1"]
    C --> D["Master Slave2"]
    D --> E["Master Slave1"]
    E --> F["Master Slave2"]
    F --> G["Master Slave1"]
    G --> H["Master Slave2"]
    H --> I["Master Slave1"]
    I --> J["Master Slave2"]
    J --> K["Master Slave1"]
    K --> L["Master Slave2"]
    L --> M["Master Slave1"]
    M --> N["Master Slave2"]
    N --> O["Master Slave1"]
    O --> P["Master Slave2"]
    P --> Q["Master Slave1"]
    Q --> R["Master Slave2"]
    R --> S["Master Slave1"]
    S --> T["Master Slave2"]
    T --> U["Master Slave1"]
    U --> V["Master Slave2"]
    V --> W["Master Slave1"]
    W --> X["Master Slave2"]
    X --> Y["Master Slave1"]
    Y --> Z["Master Slave2"]
    Z --> AA["Master Slave1"]
    AA --> AB["Master Slave2"]
    AB --> AC["Master Slave1"]
    AC --> AD["Master Slave2"]
    AD --> AE["Master Slave1"]
    AE --> AF["Master Slave2"]
    AF --> AG["Master Slave1"]
    AG --> AH["Master Slave2"]
    AH --> AI["Master Slave1"]
    AI --> AJ["Master Slave2"]
    AJ --> AK["Master Slave1"]
    AK --> AL["Master Slave2"]
    AL --> AM["Master Slave1"]
    AM --> AN["Master Slave2"]
    AN --> AO["Master Slave1"]
    AO --> AP["Master Slave2"]
    AP --> AQ["Master Slave1"]
    AQ --> AR["Master Slave2"]
    AR --> AS["Master Slave1"]
    AS --> AT["Master Slave2"]
    AT --> AU["Master Slave1"]
    AU --> AV["Master Slave2"]
    AV --> AW["Master Slave1"]
    AW --> AX["Master Slave2"]
    AX --> AY["Master Slave1"]
    AY --> AZ["Master Slave2"]
    AZ --> BA["Master Slave1"]
    BA --> BB["Master Slave2"]
    BB --> BC["Master Slave1"]
    BC --> BD["Master Slave2"]
    BD --> BE["Master Slave1"]
    BE --> BF["Master Slave2"]
    BF --> BG["Master Slave1"]
    BG --> BH["Master Slave2"]
    BH --> BI["Master Slave1"]
    BI --> BJ["Master Slave2"]
    BJ --> BK["Master Slave1"]
    BK --> BL["Master Slave2"]
    BL --> BM["Master Slave1"]
    BM --> BN["Master Slave2"]
    BN --> BO["Master Slave1"]
    BO --> BP["Master Slave2"]
    BP --> BQ["L150m (200 m : Conditional application)"]
    BQ --> BR["L40m (90 m : Conditional application)"]
    BR --> BS["L150m (200 m : Conditional application)"]
    BS --> BT["L40m (90 m : Conditional application)"]
    BT --> BU["L150m (200 m : Conditional application)"]
    BU --> BV["L40m (90 m : Conditional application)"]
    BV --> BW["L150m (200 m : Conditional application)"]
    BW --> BX["L40m (90 m : Conditional application)"]
    BX --> BY["L150m (200 m : Conditional application)"]
    BY --> BZ["L40m (90 m : Conditional application)"]
    BZ --> CA["L150m (200 m : Conditional application)"]
    CA --> CB["L40m (90 m : Conditional application)"]
    CB --> CC["L150m (200 m : Conditional application)"]
    CC --> CD["L40m (90 m : Conditional application)"]
    CD --> CE["L150m (200 m : Conditional application)"]
    CE --> CF["L40m (90 m : Conditional application)"]
    CF --> CG["L150m (200 m : Conditional application)"]
    CG --> CH["L40m (90 m : Conditional application)"]
    CH --> CI["L150m (200 m : Conditional application)"]
    CI --> CJ["L40m (90 m : Conditional application)"]
    CJ --> CK["L150m (200 m : Conditional application)"]
    CK --> CR["L40m (90 m : Conditional application)"]
    CR --> CS["L150m (200 m : Conditional application)"]
    AT["ODU Capacity Master ≥ Slave1 ≥ Slave 2"] --> AU["A → D"]

4 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch (Y branch)
©: Indoor Units
⑭: Downward Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN41
⑤ : Connection branch pipe between Outdoor units: ARCNN31
G : Connection branch pipe between Outdoor units : ARCNN21

graph TD
    A["Slave1"] --> B["Master"]
    C["Slave2"] --> B
    D["Slave3"] --> B
    B --> E["Master"]
    style A fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#cfc,stroke:#333
    style E fill:#fcc,stroke:#333
    note right of E: H 110m
    note right of F: 10m or less
    note right of G: Master
    note right of H: H 110m
    note right of L150m (200 m : Conditional application)
    note right of l40m (90 m : Conditional application)
    note right of a: h15m
    note right of b: a, b, c, d, e, f, g, h
    note right of c, d, e, f, g, h
    note right of s: 5

Piping length form outdoor branch to outdoor unit ≤ 10 m, equivalent length : max. 13 m(for 22 HP or more)

Additional Application

To satisfy below condition to make 40 m \~ 90 m of pipe length after first branch.

1) Diameter of pipes between first branch and the last branch should be increased by one step, except pipe diameter B,C,D is same as Diameter A 6.359.5212.715.8819.0522.225.4^,28.5831.8^,34.938.1^*

* : It is not necessary to size up.

2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice. A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 1,000 m
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 40 m
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)] - [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)] ≤ 40 m

☐ Refrigerant pipe diameter from branch to branch (B,C,D)

Downward Indoor Unit total capacity [kW(Btu/h)]	Liquid pipe [mm(inch)]	Gas pipe [mm(inch)]
≤ 5.6(19,100)	∅6.35(1/4)	∅12.7(1/2)
< 16.0(54,600)	∅9.52(3/8)	∅15.88(5/8)
≤ 22.4(76,400)	∅9.52(3/8)	∅19.05(3/4)
< 33.6(114,700)	∅9.52(3/8)	∅22.2(7/8)
< 50.4(172,000)	∅12.7(1/2)	∅28.58( 1^1/_8 )
< 67.2(229,400)	∅15.88(5/8)	∅28.58( 1^1/_8 )
< 72.8(248.500)	∅15.88(5/8)	∅34.9( 1^3/_8 )
< 100.8(344,000)	∅19.05(3/4)	∅34.9( 1^3/_8 )
< 173.6(592,500)	∅19.05(3/4)	∅41.3( 1^5/_8 )
< 184.8(630,700)	∅22.2(7/8)	∅44.5( 1^3/_4 )
< 224.0(764,400)	∅22.2(7/8)	∅53.98(2)

Total pipe length = A+B+C+D+a+b+c+d+e ≤ 1,000 m

L	Longest pipe length	Equivalent pipe length
	A+B+C+D+e ≤ 150m(200 m**)	*A+B+C+D+e ≤ 175m(225 m**)
l	Longest pipe length after 1st branch
	B+C+D+e ≤ 40m(90 m**)
H	Difference in height(Outdoor Unit <> Indoor Unit)
	H ≤ 110m
h	Difference in height (Indoor Unit ↔ Indoor Unit)
	h ≤15m
h1	Difference in height (Outdoor Unit <> Outdoor Unit)
	h1 ≤ 5m

- * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose.

• ** : To apply Conditional Application

WARNING

If overall equivalent pipe length is more than 90m from ODU to the longest IDU, The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

☐ Refrigerant pipe diameter from outdoor unit to first branch. (A)

Outdoor unitTotal capacity[kW (Btu/h)]	Standard Pipe Diameter		Conditional application(more than 90m from ODU to IDU)
	Liquid pipe[mm (inch)]	Gas pipe[mm (inch)]	Liquid pipe[mm (inch)]	Gas pipe[mm (inch)]
16.0~22.4(54,600~76,400)	Φ9.52(3/8)	Φ19.05(3/4)	Φ12.7(1/2)	Φ22.2(7/8)
28.0(95,900)		Φ22.2(7/8) Φ25.4(1)
33.6~44.8(172,000~152,900)	Φ12.7(1/2)	Φ28.58(1 1/8)	Φ15.88(5/8)	Φ28.58(1 1/8)
50.4~61.6(172,000~210,600)	Φ15.88(5/8)	Φ19.05(3/4)	1 5/8)	Φ31.8(1 1/4)
67.2(229,400)		Φ34.9(1 3/8)		Φ34.9(1 3/8)
72.8~95.2(248,500~324,900)	Φ19.05(3/4)	Φ22.2(7/8)		Φ38.1(1 1/2)
100.8~168.0(344,000~573,300)		Φ41.3(1 5/8) Φ41.3
173.6~179.2(592,500~611,600)	Φ22.2(7/8)	Φ44.5(1 3/4)	Φ25.4(1) Φ5	3.98(2)
184.8~224.0(630,700~764,400)		Φ53.98(2)

* If available on site, it use this size. Otherwise it can't be increased.

◆ Header Method

1 Outdoor Unit

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch
©: Indoor Units
⑭ : Sealed piping

H 110m L 200m l 40m a b c d e f 15m C C C C C 6

2 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : Header branch
©: Indoor Units
⑭ : Sealing
⑤ : Connection branch pipe between Outdoor units: ARCNN21

graph TD
    A["Slave Master"] --> B["Slave Master"]
    B --> C["Slave Master"]
    C --> D["L 200m"]
    D --> E["Master"]
    E --> F["40m"]
    F --> G["Output"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#cfc,stroke:#333
    note right of D: "ODU Capacity Master ≥ Slave"
    note left of A: "10m or less"
    note right of F: "l 40m"
    note bottom of D: "L 110m"
    note bottom of F: "15m"
    note top of A: "E" (with labels 'A', 'B', 'C', 'D', 'e', 'f', 's')

3 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : Header branch
©: Indoor Units
⑭ : Sealing
⑤ : Connection branch pipe between Outdoor units: ARCNN31
⑤ : Connection branch pipe between Outdoor units: ARCNN21

graph TD
    A["Slave1 Slave2 Master"] --> B["10m or less"]
    B --> C["H 110m"]
    D["L 200m"] --> E["40m"]
    E --> F["6"]
    G["15m"] --> H["3"]
    H --> I["4"]
    I --> J["5"]
    K["1"] --> L["2"]
    L --> M["3"]
    M --> N["4"]
    N --> O["5"]
    P["8"] --> Q["2"]
    Q --> R["3"]
    R --> S["4"]
    S --> T["5"]
    U["A"] --> V["F"]
    V --> W["E"]
    X["B"] --> Y["X"]
    Y --> Z["D"]
    AA["A"] --> AB["F"]
    AB --> AC["E"]
    AD["A"] --> AE["F"]
    AE --> AF["E"]
    AG["A"] --> AH["F"]
    AH --> AI["E"]
    AJ["A"] --> AK["F"]
    AK --> AL["E"]
    AM["A"] --> AN["F"]
    AN --> AO["E"]
    AP["A"] --> AQ["F"]
    AQ --> AR["E"]
    AS["A"] --> AT["F"]
    AT --> AU["E"]
    AV["A"] --> AW["F"]
    AW --> AX["E"]
    AY["A"] --> AZ["F"]
    AZ --> BA["E"]

Branch pipe can not be used after header

4 Outdoor Units

Example : 6 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : Header branch
©: Indoor Units
⑭ : Sealing
⑤ : Connection branch pipe between Outdoor units: ARCNN41
⑤ : Connection branch pipe between Outdoor units: ARCNN31
⑥ : Connection branch pipe between Outdoor units : ARCNN21

graph TD
    A["Master"] --> B["Slave1"]
    A --> C["Slave2"]
    A --> D["Slave3"]
    B --> E["Master"]
    C --> F["Slave2"]
    D --> G["Slave3"]
    H["10m or less"] --> I["G"]
    I --> J["F"]
    J --> K["E"]
    K --> L["A"]
    L --> M["L 200m"]
    M --> N["a"]
    M --> O["b"]
    M --> P["c"]
    M --> Q["d"]
    M --> R["e"]
    M --> S["D"]
    N --> T["f"]
    O --> U["f"]
    P --> V["f"]
    Q --> W["f"]
    R --> X["f"]
    S --> Y["f"]
    T --> Z["15m"]
    U --> AA["15m"]
    V --> AB["15m"]
    W --> AC["15m"]
    X --> AD["15m"]
    Y --> AE["15m"]
    Z --> AF["40m"]
    AA --> AG["40m"]
    AB --> AH["40m"]
    AC --> AI["40m"]
    AD --> AJ["40m"]
    AE --> AK["40m"]

Branch pipe can not be used after header

Total pipe length = A+a+b+c+d+e+f ≤ 1,000m

L	Longest pipe length	* Equivalent pipe length
	A+f ≤ 200m	A+f ≤ 225m
l	Longest pipe length after 1st branch
	f ≤ 40m
H	Difference in height(Outdoor Unit ↔ Indoor Unit)
	H ≤ 110m
h	Difference in height (Indoor Unit ↔ Indoor Unit)
	h ≤15m
h1	Difference in height (Outdoor Unit ↔ Outdoor Unit)
	h1 ≤ 5m

WARNING

Pipe length after header branching (a\~f)

It is recommended that difference in length of the pipes connected to the Indoor Units is minimized.

Performance difference between Indoor Units may occur.

• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
- Indoor Unit should be installed at lower position than the header.
- Piping length from outdoor branch to outdoor unit ≤ 10m, equivalent length : max 13m (for 22HP or more)

◆ Combination of Y branch/header method

1 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch (Y branch)
© : Y branch
(D): Indoor Unit
⑤ : Header
⑤ : Sealed piping

graph TD
    A["Building A"] -->|L 110m| B["Building B"]
    B --> C["Building C"]
    C --> D["Building D"]
    D --> E["Building E"]
    E --> F["Building F"]
    F --> G["Building G"]
    G --> H["Building H"]
    H --> I["Building I"]
    I --> J["Building J"]
    J --> K["Building K"]
    K --> L["Building L"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#ccf,stroke:#333
    style F fill:#ccf,stroke:#333
    style G fill:#ccf,stroke:#333
    style H fill:#ccf,stroke:#333
    style I fill:#ccf,stroke:#333
    style J fill:#ccf,stroke:#333
    style K fill:#ccf,stroke:#333
    style L fill:#ccf,stroke:#333
    style_M["Building M"] --> N["Building N"]
    N --> O["Building O"]
    O --> P["Building P"]
    P --> Q["Building Q"]
    Q --> R["Building R"]
    R --> S["Building S"]
    S --> T["Building T"]
    T --> U["Building U"]
    U --> V["Building V"]
    V --> W["Building W"]
    W --> X["Building X"]
    X --> Y["Building Y"]
    Y --> Z["Building Z"]
    Z --> AA["Building AA"]
    AA --> AB["Building AB"]
    AB --> AC["Building AC"]
    AC --> AD["Building AD"]
    AD --> AE["Building AE"]
    AE --> AF["Building AF"]
    AF --> AG["Building AG"]

Branch pipe can not be used after header

2 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch
© : Y branch
(D): Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN21
⑤ : Header
© : Sealed piping

graph TD
    A["Slave"] --> B["Master"]
    B --> C["Slave"]
    C --> D["Master"]
    D --> E["Slave"]
    E --> F["Master"]
    style A fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#ccf,stroke:#333
    note right of A: "10m or less"
    note right of E: "ODU Capacity Master ≥ Slave"
    note right of F: "L 150m(200m : Conditional application)"
    note right of G: "40m(90m : Conditional application)"
    note right of H: "H 110m"
    note right of L: "h 15m"
    note right of b: "b"
    note right of c: "C 1"
    note right of d: "d 4"
    note right of e: "e 5"
    note right of f: "F"
    note right of g: "G"

Branch pipe can not be used after header

3 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch(Y branch)
©: Y branch
(D): Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN31
⑤ : Connection branch pipe between Outdoor units: ARCNN21
© : Header
⑧ : Sealing

graph TD
    A["Slave1 Master"] --> B["Slave2 Master"]
    B --> C["L 150m(200m : Conditional application)"]
    C --> D["40m(90m : Conditional application)"]
    D --> E["2"]
    E --> F["3"]
    F --> G["4"]
    G --> H["5"]
    H --> I["6"]
    I --> J["7"]
    J --> K["8"]
    K --> L["9"]
    L --> M["10"]
    M --> N["H 110m"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#cfc,stroke:#333
    style H fill:#fcc,stroke:#333
    style I fill:#cfc,stroke:#333
    style J fill:#fcc,stroke:#333
    style K fill:#cfc,stroke:#333
    style L fill:#fcc,stroke:#333
    style M fill:#cfc,stroke:#333
    style N fill:#fcc,stroke:#333

Branch pipe can not be used after header

4 Outdoor Units

Example : 5 Indoor Units connected

Ⓐ : Outdoor Unit
⑧ : 1st branch(Y branch)
© : Y branch
(D) : Indoor Unit
⑤ : Connection branch pipe between Outdoor units: ARCNN41
⑤ : Connection branch pipe between Outdoor units: ARCNN31
G : Connection branch pipe between Outdoor units: ARCNN21
⑧ : Header
① : Sealing

graph TD
    A["Slave1 Master"] -->|G F E| B["Slave2 Master"]
    B --> C["L 150m(200m : Conditional application)"]
    C --> D["40m(90m : Conditional application)"]
    D --> E["Master"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#cfc,stroke:#333
    note right of A: Master ≥ Slave1 ≥ Slave2 ≥ Slave3
    note right of C: L 150m(200m : Conditional application)
    note right of D: 40m(90m : Conditional application)
    note right of E: H 110m
    note right of D: h 15m

Branch pipe can not be used after header

☐ Refrigerant pipe diameter from branch to branch (B,C)

Downward Indoor Unit total capacity [kW(Btu/h)]	Liquid pipe [mm(inch)]	Gas pipe [mm(inch)]
≤ 5.6(19,100)	∅6.35(1/4)	∅12.7(1/2)
< 16.0(54,600)	∅9.52(3/8)	∅15.88(5/8)
≤ 22.4(76,400)	∅9.52(3/8)	∅19.05(3/4)
< 33.6(114,700)	∅9.52(3/8)	∅22.2(7/8)
< 50.4(172,000)	∅12.7(1/2)	∅28.58(11/8 )
< 67.2(229,400)	∅15.88(5/8)	∅28.58(11/8 )
< 72.8(248,500)	∅15.88(5/8)	∅34.9(13/8)
< 100.8(344,000)	∅19.05(3/4)	∅34.9(13/8)
< 173.6(592,500)	∅19.05(3/4)	∅41.3(15/8)
< 184.8(630,700)	∅22.2(7/8)	∅44.5(13/4)
< 224.0(764,400)	∅22.2(7/8)	∅53.98(2)

Total pipe length = A+B+C+a+b+c+d+e ≤ 1,000m

L	Longest pipe length	* Equivalent pipe length
	A+B+b ≤ 150m(200m**)	A+B+b ≤ 175m(225m**)
l	Longest pipe length after 1st branch
	B+b ≤ 40m(90m**)
H	Difference in height(Outdoor Unit ↔ Indoor Unit)
	H ≤ 110m
h	Difference in height (Indoor Unit ↔ Indoor Unit)
	h ≤ 15m
h1	Difference in height (Outdoor Unit ↔ Outdoor Unit)
	h1 ≤ 5m

• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose

- Indoor Unit should be installed at lower position than the header.

WARNING

It is recommended that difference of piping length for pipes connected to the Indoor Unit is minimized. Performance difference between Indoor Units may occur.

WARNING

If overall equivalent pipe length is more than 90m from ODU to the longest IDU, The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.

☐ Refrigerant pipe diameter from outdoor unit to first branch. (A)

Outdoor unitTotal capacity[kW (Btu/h)]	Standard Pipe Diameter		Conditional application(more than 90m from ODU to IDU)
	Liquid pipe[mm (inch)]	Gas pipe[mm (inch)]	Liquid pipe[mm (inch)]	Gas pipe[mm (inch)]
16.0~22.4(54,600~76,400)	9.52(3/8)	19.05(3/4)	12.7(1/2)	22.2(7/8)
28.0(95,900)		22.2(7/8) 25.4(1)
33.6~44.8(172,000~152,900)	12.7(1/2)	28.58(1 1/8)	15.88(5/8)	28.58(1 1/8)
50.4~61.6(172,000~210,600)	15.88(5/8) 19.05(3/4)			31.8(1 1/4)
67.2(229,400)		34.9(1 3/8)		34.9(1 3/8)
72.8~95.2(248,500~324,900)	19.05(3/4) 22.2(7/8)		1 5/8)	38.1(1 1/2)
100.8~168.0(344,000~573,300)		41.3(1 5/8) 41.3
173.6~179.2(592,500~611,600)	22.2(7/8)	44.5(1 3/4)	25.4(1) 5	3.98(2)
184.8~224.0(630,700~764,400)		53.98(2)

* If available on site, it use this size. Otherwise it can't be increased.

◆ Outdoor unit Connection

WARNING

- In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same size with A.

Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.

1) Outdoor unit main pipe diameter A : ∅34.9(gas pipe), ∅15.88(liquid pipe)
2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) :∅34.9(gas pipe), ∅19.05(liquid pipe)
Therefore, pipe diameter B connected after first branch would be ∅34.9(gas pipe)/∅15.88(liquid pipe) which is same with main pipe diameter.

[Example]

Do not choose the main pipe diameter by downward indoor unit total capacity but its outdoor unit model name.
Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model name.
EX) Where connecting the indoor units to the 22 HP (61.5 kW) outdoor unit to 120% of its system capacity (73.8 kW) and branching 7k (2.1 kW) indoor unit at the 1st branch
Main pipe diameter(22 HP outdoor unit): ∅28.58(Gas pipe) ∅15.88(Liquid pipe)
Pipe diameter between 1st and 2nd branch (71.7kW indoor units):
∅34.9(Gas pipe) ∅19.05(Liquid pipe) in conformity with downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is ∅28.58(Gas pipe) and ∅15.88(Liquid pipe), ∅28.58 (Gas pipe) and ∅15.88 (Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd branch.

* High/Low Pressure Common Pipe: ∅19.05(22HP or more)

◆ Indoor Unit Connection

Indoor Unit connecting pipe from branch (a,b,c,d,e,f)

Indoor Unit capacity [kW(Btu/h)]	Liquid pipe [mm(inch)]	Gas pipe [mm(inch)]
≤ 5.6(19,100)	∅6.35(1/4)	∅12.7(1/2)
< 16.0(54,600)	∅9.52(3/8)	∅15.88(5/8)
< 22.4(76,400)	∅9.52(3/8)	∅19.05(3/4)

◆ Pipe Connection Method/Precautions for Series connections between Outdoor units

• Separate Y branch joints are needed for series connections between outdoor units.
• Please refer to the below connection examples to install pipe connections between outdoor units.

■ Pipe connection between outdoor units (General Case)

units The maximum pipe length after the first branching between the outdoor units is 10m or less

■ Pipes between outdoor units are 2m or less

2m or less

■ Pipes between outdoor units are 2m or longer

Oil Trap 0.2m or more 2m or less 2m or longer

Oil Trap Oil Trap 2m or less 2m or less 2m or longer 2m or longer

• If the distance between the outdoor units becomes more than 2m, apply Oil Traps between the gas pipes.
• If the outdoor unit is located lower than the main pipe, apply Oil Trap.

■ Examples of Wrong Pipe Connections

If the main pipe is higher than the outdoor units, oil is accumulated in the outdoor unit.

graph TD
    A["Three buildings"] --> B["Oil Trap"]
    B --> C["Three buildings"]
    style A fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333

graph TD
    A["High-rise Building 1"] --> C["Switch"]
    B["High-rise Building 2"] --> C["Switch"]
    D["Low-rise Building 3"] --> C["Switch"]
    C --> E["Low-rise Building"]

If there are differences in the height between the outdoor units, oil is accumulated in the lower outdoor unit.

Three identical buildings connected by a circular network diagram (no text or symbols)

- The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow toward the slave outdoor unit. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

Toward indoor unit

(Example 2)

Toward indoor unit Pipe inclination (2° or more)

Toward indoor unit

(Example 3)

Toward indoor unit

Toward indoor unit

- Apply Oil Trap as shown below when the length of the pipe between the outdoor units is more than 2m. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit ≤ 2m Toward indoor unit ≥ 0.2m Oil Trap ≤ 2m ≥ 2m

(Example 2)

- When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided. Otherwise, the unit may not operate properly.

(Example 1)

Toward indoor unit

Toward indoor unit

(Example 2)

() Toward indoor unit h

(Example 3)

) Toward indoor unit Toward indoor unit h

Oil Trap ≥0.2m h

◆ The amount of Refrigerant

The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of indoor unit.

Additional charge(kg)	=	Total liquid pipe:Ø25.4 mm	× 0.480(kg/m)	Amount refrigerant of Indoor unitsExample) 4Way Ceiling Cassette 14.5kW -1eaCeiling concealed Duct 7.3kW-2eaWall Mounted 2.3kW-4ea
	+	Total liquid pipe:Ø22.2 mm	× 0.354(kg/m)	CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
	+	Total liquid pipe:Ø19.05 mm	× 0.266(kg/m)
	+	Total liquid pipe:Ø15.88 mm	× 0.173(kg/m)
	+	Total liquid pipe:Ø12.7 mm	× 0.118(kg/m)
	+	Total liquid pipe:Ø9.52 mm	× 0.061(kg/m)
	+	Total liquid pipe:Ø6.35 mm	× 0.022(kg/m)
	+	CF value of indoor unit

CF value of indoor unit (unit : kg)

Type\Capacity(Btu/h(kW))	5k(1.6)	7k(2.2)	9k(2.8)	12k(3.6)	15k(4.5)	18k(5.6)	24k(7.1)	28k(8.2)	36k(10.6)	42k(12.3)	48k(14.1)	76k(22.4)	96k(28.0)
Ceiling Concealed Duct (Low Static)	-0.17	0.17	0.17	0.170	370.37			-	-	-	-	-	-
Ceiling Concealed Duct (High Static)	-0.26	0.26	0.26	0.260	260.26	0.44	0.44	0.440.62	1.00	1.00
Wall Mounted	-0.24	0.24	0.24	0.240	280.28			-	-	-	-	-	-
1Way Ceiling Cassette	-0.20	0.20	0.20	-0.29	0.29			-	-	-	-	-	-
2Way Ceiling Cassette	-	-	-	-	-	0.16	0.16-	-	-	-	-	-
4Way Ceiling Cassette	0.18	0.180	250.25	0.32	0.320	0.480.48	0.64	0.64	0.64-
ARTCOOL Gallery	-0.10	0.10	0.10		-	-	-	-	-	-	-	-	-
Floor Standing	-0.17	0.17	0.17	0.170	370.37			-	-	-	-	-	-
Ceiling & Floor	--0.10	0.10			-	-	-	-	-	-	-	-	-
Ceiling Suspended	-	-	-	-	-	0.35	0.35-	0.54-	0.75-
Console	-0.17	0.17	0.17	0.17		-	-	-	-	-	-	-	-
Fresh Air Intake Unit	-	-	-	-	-	-	-	-	-	-	0.62	1.00	1.00
Heat recovery ventilator(DX)	-	-	-	0.20	-	0.20	0.20	-	-	-	-	-	-

CAUTION

Use only 2-series of indoor unit. Ex) ARNU***2

WARNING

▶ Regulation for refrigerant leakage

: the amount of refrigerant leakage should satisfy the following equation for human safety.

Total amount of refrigerant in the system

≤ 0.44 (kg / m ^3 )

Volume of the room at which Indoor Unit of the least capacity is installed

☐ If the above equation can not be satisfied, then follow the following steps.

- Selection of air conditioning system: select one of the next

1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant

4. Installation of 2 or more security device (alarm for gas leakage)

5. Change Indoor Unit type
   : installation position should be over 2m from the floor (Wall mounted type → Cassette type)

6. Adoption of ventilation system
   : choose ordinary ventilation system or building ventilation system
7. Limitation in piping work
   : Prepare for earthquake and thermal stress

Refrigerant Bottling

Liquid pipe Gas pipe Common pipe

Ⓐ Manifold Gauge
⑧ Low pressure side Handle
© High pressure side Handle

• Add exact amount of refrigerant calculated by the installation pipe diameter length and the indoor combination.
• If the refrigerant amount is not exact, it may not operate properly.
• If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.

WARNING

• Pipe to be vacuumed : gas pipe, water pipe, common pipe
• If the refrigerant amount is not exact, it may not operate properly.
• If additionally bottled refrigerant amount is over ±10% , condenser burning or insufficient indoor unit performance may be caused.

Distribution Method

1. Line Distribution

graph TD
    A["Slave Master"] --> B["1st"]
    B --> C["2nd"]
    C --> D["Main pipe Distribution"]
    E["Slave Master"] --> F["1st"]
    F --> G["2nd"]
    G --> H["Main pipe Distribution"]
    I["Slave Master"] --> J["1st"]
    J --> K["2nd"]
    K --> L["Main pipe Distribution"]
    M["Slave Master"] --> N["1st"]
    N --> O["2nd"]
    O --> P["Main pipe Distribution"]
    Q["Slave Master"] --> R["1st"]
    R --> S["2nd"]
    S --> T["Main pipe Distribution"]
    U["Slave Master"] --> V["1st"]
    V --> W["2nd"]
    W --> X["Main pipe Distribution"]

graph TD
    A["Slave"] --> B["1st"]
    B --> C["2nd"]
    C --> D["3rd"]
    D --> E["Master"]
    C --> F["3rd main pipe distribution"]
    F --> G["Subsea"]
    F --> H["Subsea"]
    F --> I["Subsea"]
    F --> J["Subsea"]
    F --> K["Subsea"]

2. Vertical Distribution

Ensure that the branch pipes are attached vertically.

graph TD
    A["Slave Master"] --> B["Base Station 1"]
    A --> C["Base Station 2"]
    A --> D["Base Station 3"]
    A --> E["Base Station 4"]
    A --> F["Base Station 5"]
    A --> G["Base Station 6"]
    A --> H["Base Station 7"]
    A --> I["Base Station 8"]
    A --> J["Base Station 9"]
    A --> K["Base Station 10"]

graph TD
    A["Slave"] --> B["Master"]
    B --> C["Database"]
    B --> D["Database"]
    B --> E["Database"]
    B --> F["Database"]
    B --> G["Database"]
    B --> H["Database"]
    style B fill:#f9f,stroke:#333,stroke-width:2px

3. The others

graph TD
    A["Slave Master"] --> B["Server Rack 1"]
    A --> C["Server Rack 2"]
    A --> D["Server Rack 3"]
    A --> E["Server Rack 4"]
    A --> F["Server Rack 5"]
    A --> G["Master"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#ccf,stroke:#333
    style F fill:#ccf,stroke:#333
    style G fill:#ccf,stroke:#333

graph TD
    A["Slave Master"] --> B["Header"]
    B --> C["Server 1"]
    B --> D["Server 2"]
    B --> E["Server 3"]
    B --> F["Server 4"]
    B --> G["Server 5"]
    B --> H["Server 6"]
    B --> I["Server 7"]
    B --> J["Server 8"]

Branch pipe Fitting

■ Y branch A B

Ⓐ To Outdoor Unit
B To Branch Piping or Indoor Unit

- Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)

Horizontal plane Viewed from point A in direction of arrow Within +/- 10° Facing downwards Facing upwards Within ± 3° Within ± 3°

• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures described is different from the size of the joint, the connecting section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.

Insulator (included with kit) Liquid and gas pipe joints Insulator for field piping (field supply)

■ Header A B

Technical line drawing of a mechanical pipe fitting with a clamp and valve (no text or symbols)

Ⓐ To outdoor unit
B To indoor unit

• The indoor unit having larger capacity must be installed closer to Ⓐ than smaller one.
• If the diameter of the refrigerant piping selected by the procedures described is different from the size of the joint, the connecting section should be cut with a pipe cutter.

© Pipe cutter

- When the number of pipes to be connected is smaller than the number of header branches, install a cap to the unconnected branches.

- When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches.

B Pinched pipe

- Fit branch pipe lie in a horizontal plane.

Horizontal plane

View from point B in the direction of the arrow

- Header should be insulated with the insulator in each kit.

Insulate the header using the insulation material attached to the branch pipe kit as shown in the figure.

- Joints between branch and pipe should be sealed with the tape included in each kit.

Tape Insulator Insulator of field pipe

- Any cap pipe should be insulated using the insulator provided with each kit and then taped as described above.

Insulator for cap pipe Cap pipe Tape

◆ Y branch pipe

[unit:mm]

Models Gas pipe Liquid pipe
ARBLN01621
ARBLN03321
ARBLN07121
ARBLN14521
ARBLN23220

◆ Header
[unit:mm]

Models Gas pipe Liquid pipe
4 branch ARBL054
7 branch ARBL057
4 branch ARBL104
7 branch ARBL107
10 branch ARBL1010
10 branch ARBL2010

Leak Test and Vacuum drying

(1) Leak test

Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm²). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas pipe and high/low pressure common pipe)

The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitrogen gas pressurization.

graph TD
    A["Nitrogen gas cylinder"] --> B["High/low pressure common pipe"]
    B --> C["Liquid pipe"]
    C --> D["Gas pipe"]
    D --> E["Liquid side"]
    E --> F["Indoor unit"]
    G["Nitrogen gas cylinder"] --> H["High/low pressure common pipe"]
    H --> I["Liquid pipe"]
    I --> J["Gas pipe"]
    J --> K["Liquid side"]
    K --> L["Indoor unit"]
    M["Close"] --> N["Close"]
    O["Close"] --> P["Close"]
    Q["Close"] --> R["Close"]
    S["Close"] --> T["Close"]
    U["Close"] --> V["Close"]
    W["Close"] --> X["Close"]
    Y["Close"] --> Z["Close"]
    AA["Liquid side"] --> AB["Indoor unit"]
    AC["Gas side"] --> AD["Indoor unit"]

Note:

If the ambient temperature differs between the time when pressure is applied and when the pressure drop is checked, apply the following correction factor

There is a pressure change of approximately 0.1 kg/cm^2 (0.01 MPa) for each 1^ of temperature difference.

Correction= (Temp. at the time of pressurization - Temp. at the time of check) X 0.1

For example: Temperature at the time of pressurization (3.8 MPa) is 27 °C

24 hour later: 3.73 MPa, 20°C

In this case the pressure drop of 0.07 is because of temperature drop

And hence there is no leakage in pipe occurred.

Caution:

To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be at higher position than the bottom when you pressurize the system.

Usually the cylinder is used in a vertical standing position.

(2) Vacuum

Vacuum drying should be made from the service port provided on the outdoor unit's service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.)

* Never perform air purging using refrigerant.

• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa (5 Torr, -755mmHg).

1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system to -100.7kPa. After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system may contain moisture or leak.

2. Following should be executed if there is a possibility of moisture remaining inside the pipe. (Rainwater may enter the pipe during work in the rainy season or over a long period of time) After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa (vacuum break) with nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa (vacuum drying). If the system cannot be evacuated to -100.7kPa within 2 hrs, repeat the steps of vacuum break and its drying.

Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.

graph TD
    A["Vacuum pump"] --> B["High/low pressure common pipe"]
    B --> C["Liquide pipe"]
    C --> D["Gas pipe"]
    D --> E["Liquid side"]
    E --> F["Indoor unit"]
    G["Vacuum pump"] --> H["High/low pressure common pipe"]
    H --> I["Liquide pipe"]
    I --> J["Gas pipe"]
    J --> K["Liquid side"]
    K --> L["Indoor unit"]
    M["Scale Use a graviometer. (One that can measure down to 0.1kg). If you are unable to prepare"] --> N["Gas side"]

Note : Always add an appropriate amount of refrigerant. (For the refrigerant additional charge) Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)

WARNING

When installing and moving the air conditioner to another site, recharge after perfect evacuation.

- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

Vacuum Mode

This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.

graph TD
    A["Vacuum mode setting method Vacuum mode cancellation method"] --> B["ODU power reset"]
    B --> C["Master unit PCB DIP switch on<br>- Heat pump : switch on 11,14<br>- Cooling only : switch on 10,12,13"]
    C --> D["Press the black button Main PCB (5 sec.)"]
    D --> E["Vacuum mode setting<br>ODU V/V OPEN<br>Main EEV, SC EEV OPEN<br>IDU EEV OPEN"]
    F["Master unit PCB DIP switch off<br>- Heat pump : switch off 11,14<br>- Cooling only : switch off 10,12,13"] --> G["Power reset"]
    G --> H["Vacuum mode cancellation"]

CAUTION

ODU operation stops during vacuum mode. Compressor can't operate.

Thermal insulation of refrigerant piping

Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.

B A C

A Heat insulation material
B Pipe
© Outer covering (Wind the connection part and cutting part of heat insulation material with a finishing tape.)

Heat insulation material	Adhesive + Heat - resistant polyethylene foam + Adhesive tape
Outer covering	Indoor Vinyl tape
	Floor exposed	Water-proof hemp cloth + Bronze asphalt
	Outdoor	Water-proof hemp cloth + Zinc plate + Oily paint

Note: When using polyethylene cover as covering material, asphalt roofing shall not be required.

Bad example	Do not insulate gas or low pressure pipe and liquid or high pressure pipe together.	Liquid pipeGas pipePower linesFinishing tapeInsulating materialTransmission lines	Be sure to fully insulate connecting portion.These parts are not insulated.
Good example

Penetrations

Inner wall (concealed)

Floor (fireproofing)

Technical diagram of a mechanical assembly with labeled components A through G

Outer wall

Roof pipe shaft

Outer wall (exposed)

Penetrating portion on fire limit and boundary wall

A 1m 1m

Ⓐ Sleeve
⑧ Heat insulating material
© Lagging
© Caulking material
E Band
⑤ Waterproofing layer
© Sleeve with edge
H Lagging material
① Mortar or other incombustible caulking
① Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so that the insulation material will not be caved in. For this part, use incombustible materials for both insulation and covering.(Vinyl covering should not be used.)

Electrical Wiring

Caution

1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.

WARNING

Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual. If power supply circuit has a lack of capacity or electric work deficiency, it may cause an electric shock or fire.

1. Install the Outdoor Unit transmission line away from the power source wiring so that it is not affected by electric noise from the power source. (Do not run it through the same conduit.)
2. Be sure to provide designated grounding work to Outdoor Unit.

CAUTION

Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe, lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.

1. Give some allowance to wiring for electrical part box of Indoor and Outdoor Units, because the box is sometimes removed at the time of service work.
2. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will be burnt out.
3. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erroneous operations ( mark in the figure below)
4. Only the transmission line specified should be connected to the terminal block for Outdoor Unit transmission.

graph TD
    A["Outdoor Unit"] --> B["Indoor Unit"]
    C["Outdoor Unit"] --> D["Indoor Unit"]
    B --> E["Remote control"]
    D --> F["Remote control"]
    B --> G["Indoor Unit"]
    D --> H["Indoor Unit"]
    G --> I["Indoor Unit"]
    H --> J["Indoor Unit"]
    style B fill:#f9f,stroke:#333
    style D fill:#f9f,stroke:#333
    style G fill:#ccf,stroke:#333
    style H fill:#ccf,stroke:#333

graph TD
    A["Outdoor Unit"] --> B["Indoor Unit"]
    B --> C["Remote control"]
    C --> D["Indoor Unit"]
    D --> E["Remote control"]
    E --> F["Indoor Unit"]
    F --> G["Remote control"]
    G --> H["Indoor Unit"]
    H --> I["Remote control"]
    I --> J["Indoor Unit"]
    J --> K["Remote control"]
    K --> L["Indoor Unit"]
    L --> M["Remote control"]
    M --> N["Indoor Unit"]
    N --> O["Remote control"]
    O --> P["Indoor Unit"]
    P --> Q["Remote control"]
    Q --> R["Indoor Unit"]
    R --> S["Remote control"]
    S --> T["Indoor Unit"]
    T --> U["Remote control"]
    U --> V["Indoor Unit"]

2-Core Shield Cable Multi-Core Cable

graph TD
    subgraph_Master_Slave1_Slave2["Master Slave1 Slave2"]
        A1["Indoor Unit"] --> B1["Indoor Unit"]
        A2["Indoor Unit"] --> B2["Indoor Unit"]
        A3["Indoor Unit"] --> B3["Indoor Unit"]
    end
    subgraph_Master_Slave1_Slave2["Master Slave1 Slave2"]
        A4["Indoor Unit"] --> B4["Indoor Unit"]
        A5["Indoor Unit"] --> B5["Indoor Unit"]
        A6["Indoor Unit"] --> B6["Indoor Unit"]
    end
    B1 --> C1["Remote controller"]
    B2 --> C2["Remote controller"]
    B3 --> C3["Remote controller"]
    B4 --> D1["Remote controller"]
    B5 --> D2["Remote controller"]
    B6 --> D3["Remote controller"]
    style Master_Slave1_Slave2 fill:#f9f,stroke:#333
    style Outdoor_Unit fill:#ccf,stroke:#333

graph TD
    subgraph Master Slave1 Slave2
        A1["Master Slave1"] --> B1["Indoor Unit"]
        A2["Master Slave1"] --> B2["Indoor Unit"]
        A3["Master Slave1"] --> B3["Indoor Unit"]
    end
    B1 --> C["Remote controller"]
    B2 --> C
    B3 --> C
    C --> D["Indoor Unit"]
    D --> E["Indoor Unit"]
    E --> F["Remote controller"]
    style Master Slave1 Slave2 fill:#f9f,stroke:#333
    style Outdoor Slave1 Slave2 fill:#ccf,stroke:#333

2-Core Shield Cable Multi-Core Cable

CAUTION

• Use the 2-core shield cables for transmission lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will be reduced.

◆ Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal block.

Round pressure terminal Power wire

When none are available, follow the instructions below.

• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.

Simple line drawing of a container with two circular ports and a curved arrow, no text or symbols present.

Simple line drawing of a container with two circular objects inside, no text or symbols present.

Simple line drawing of a container with two circular objects inside, no text or symbols present.

• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will strip the head and make proper tightening impossible.
  • Over-tightening the terminal screws may break them.

CAUTION

When the 400 volt power supply is applied to "N" phase by mistake, replace inverter PCB and transformer in control box.

Control box and connecting position of wiring

- Remove all of the screws at front panel and remove the panel by pulling it forward.

Isometric illustration of a multi-unit industrial cooling unit with labeled front panel (no text or symbols on the unit itself)

• Connect transmission line between main and sub outdoor unit through the terminal block.
• Connect transmission lines between outdoor unit and indoor units through the terminal block.
• When the central control system is connected to the outdoor unit, a dedicated PCB must be connected between them.
• When connecting transmission line between outdoor unit and indoor units with shielded wire, connect the shield ground to the earth screw.

WARNING

The temperature sensor for outdoor air should not be exposed to direct sunlight.

- Provide an appropriate cover to intercept direct sunlight.

UX3 Main PCB Inverter fan PCB Noise filter Reactor Bridge diode Magnet switch Inverter PCB Take care of the phase sequence of 3-phase 4-wire power system

UX2 Main PCB Inverter fan PCB Noise filter Reactor Bridge diode Magnet switch Inverter PCB Take care of the phase sequence of 3-phase 4-wire power system

UX1 Main PCB Reactor Inverter tan PCB Noise filter Bridge diode Inverter PCB Take care of the phase sequence of 3-phase 4-wire power system

Transmission and Power Lines

1) Transmission cable

• Types : shielding wire
  • Cross section : 1.0\~1.5mm ^4
  • Maximum allowable temperature: 60°C
  • Maximum allowable line length: under 1000m

2) Remote control cable

- Types : 3-core cable

3) Central control cable

Product type	Wire type	Diameter
ACP&AC Manager	(2-shielding wire,2-core wire)	1.0 1.5mm^2
AC Smart	(2-shielding wire,2-core wire)	1.0 1.5mm^2
Simple central controller	(2-shielding wire,2-core wire)	1.0 1.5mm^2

4) Separation of transmission and power lines

- If transmission and power lines are run alongside each other then there is a strong likelihood of operational faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling.

The tables below indicate our recommendation as to appropriate spacing of transmission and power lines where these are to be run side by side

Current capacity of power line		Spacing
100V or more	10A	300mm
	50A	500mm
	100A	1000mm
	Exceed 100A	1500mm

Note:

1. The figures are based on assumed length of parallel cabling up to 100m. For length in excess of 100m the figures will have to be recalculated in direct proportion to the additional length of line involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the table should be increased.
3. If the lines are laid inside conduits then the following point must also be taken into account when grouping various lines together for introduction into the conduits
4. Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same
5. In the same way, when grouping the lines power and signal lines should not be bunched together.

CAUTION

If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing of the apparatus must be carried out by a qualified person.

Wiring of main power supply and equipment capacity

1. Use a separate power supply for the Outdoor Unit and Indoor Unit.
2. Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene sheathed flexible cord.
6. Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

WARNING

• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.
• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.

CAUTION

• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction of unit or fire.

Field Wiring

1. 50Hz

◆ Example Connection of Communication Cable

■ 1 Outdoor Unit-3∅, 380-415V

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Outdoor Unit"]
    E["Power supply 1 Phase 50Hz 220-240V"] --> F["Pull Box (Installer option)"]
    F --> G["Power Line (2 Wires Cable)"]
    G --> H["Power Line (2 Wires Cable)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Power Line (2 Wires Cable)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Power Line (2 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

Diagram showing three identical electronic components connected to a 4-pin connector, with labeled pins 3 and 4.

The GND terminal at the main PCB is a '-' terminal for day contact, it is not the point to make ground connection.

■ 2 Outdoor Units-3∅, 380-415V

■ When the power source is connected in series between the units.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Power Line (4 Wires Cable)"]
    D --> E["Master"]
    D --> F["Slave"]
    G["Power supply 1 Phase 50Hz 220-240V"] --> H["L"]
    H --> I["N"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Full Box (Installer option)"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Full Box (Installer option)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Full Box (Installer option)"]
    O --> P["Power Line (2 Wires Cable)"]
    P --> Q["Full Box (Installer option)"]
    Q --> R["Power Line (2 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]
    DY --> DU["Power Line (2 Wires Cable)"]
    DU --> DVX["Power Line (3 Wires Cable)"]

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    A --> C["Fuse"]
    B --> D["Power Line (2 Wires Cable)"]
    C --> E["Power Line (4 Wires Cable)"]
    D --> F["Pull Box [Installer option"]]
    E --> G["Pull Box [Installer option"]]
    F --> H["Power Line (2 Wires Cable)"]
    G --> I["Power Line (2 Wires Cable)"]
    H --> J["Communication Line (3 Wires Cable)"]
    I --> K["Communication Line (2 Wires Cable)"]
    J --> L["Power Line (2 Wires Cable)"]
    K --> M["Power Line (2 Wires Cable)"]
    L --> N["Power Line (2 Wires Cable)"]
    M --> O["Power Line (2 Wires Cable)"]
    N --> P["Power Line (2 Wires Cable)"]
    O --> Q["Power Line (2 Wires Cable)"]
    P --> R["Power Line (2 Wires Cable)"]
    Q --> S["Power Line (2 Wires Cable)"]
    R --> T["Power Line (2 Wires Cable)"]
    S --> U["Power Line (2 Wires Cable)"]
    T --> V["Power Line (2 Wires Cable)"]
    U --> W["Power Line (2 Wires Cable)"]
    V --> X["Power Line (2 Wires Cable)"]
    W --> Y["Power Line (2 Wires Cable)"]
    X --> Z["Power Line (2 Wires Cable)"]
    Y --> AA["Power Line (2 Wires Cable)"]
    Z --> AB["Power Line (2 Wires Cable)"]
    AA --> AC["Power Line (2 Wires Cable)"]
    AB --> AD["Power Line (2 Wires Cable)"]
    AC --> AE["Power Line (2 Wires Cable)"]
    AD --> AF["Power Line (2 Wires Cable)"]
    AE --> AG["Power Line (2 Wires Cable)"]
    AF --> AH["Power Line (2 Wires Cable)"]
    AG --> AI["Power Line (2 Wires Cable)"]
    AH --> AJ["Power Line (2 Wires Cable)"]
    AI --> AK["Power Line (2 Wires Cable)"]
    AJ --> AL["Power Line (2 Wires Cable)"]
    AK --> AM["Power Line (2 Wires Cable)"]
    AL --> AN["Power Line (2 Wires Cable)"]
    AM --> AO["Power Line (2 Wires Cable)"]
    AN --> AP["Power Line (2 Wires Cable)"]
    AO --> AQ["Power Line (2 Wires Cable)"]
    AP --> AR["Power Line (2 Wires Cable)"]
    AQ --> AS["Power Line (2 Wires Cable)"]
    AR --> AT["Power Line (2 Wires Cable)"]
    AS --> AU["Power Line (2 Wires Cable)"]
    AT --> AV["Power Line (2 Wires Cable)"]
    AU --> AW["Power Line (2 Wires Cable)"]
    AV --> AX["Power Line (2 Wires Cable)"]
    AW --> AY["Power Line (2 Wires Cable)"]
    AX --> AZ["Power Line (2 Wires Cable)"]
    AY --> BA["Power Line (2 Wires Cable)"]
    AZ --> BB["Power Line (2 Wires Cable)"]
    BA --> BC["Power Line (2 Wires Cable)"]
    BB --> BD["Power Line (2 Wires Cable)"]
    BC --> BE["Power Line (2 Wires Cable)"]
    BD --> BF["Power Line (2 Wires Cable)"]
    BE --> BG["Power Line (2 Wires Cable)"]
    BF --> BH["Power Line (2 Wires Cable)"]
    BG --> BI["Power Line (2 Wires Cable)"]
    BH --> BJ["Power Line (2 Wires Cable)"]
    BI --> BK["Power Line (2 Wires Cable)"]
    BJ --> BL["Power Line (2 Wires Cable)"]
    BK --> BM["Power Line (2 Wires Cable)"]
    BL --> BN["Power Line (2 Wires Cable)"]
    BM --> BO["Power Line (2 Wires Cable)"]
    BN --> BP["Power Line (2 Wires Cable)"]
    BO --> BQ["Power Line (2 Wires Cable)"]
    BP --> BR["Power Line (2 Wires Cable)"]
    BQ --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
  • Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

graph TD
    subgraph Master Outdoor Unit
        A1["Master Outdoor Unit"] --> B1["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
        A2["Master Outdoor Unit"] --> B2["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
        A3["Master Outdoor Unit"] --> B3["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
        A4["Master Outdoor Unit"] --> B4["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
    end

    subgraph Slave Outdoor Unit
        C1["Slave Outdoor Unit"] --> D1["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
        C2["Slave Outdoor Unit"] --> D2["SODU IDU INTERNET DRY1 DRY2 GND 12V"]
    end

    A1 --> B1
    A1 --> B2
    A1 --> B3
    A2 --> B3
    A2 --> B4
    A3 --> B4
    A3 --> B5
    A4 --> B5
    A4 --> B6
    A5 --> B6
    A5 --> B7
    A6 --> B7
    A6 --> B8
    A7 --> B8
    A7 --> B9
    A8 --> B9
    A8 --> B10
    A9 --> B10
    A9 --> B11
    A10 --> B10
    A10 --> B11
    A11 --> B11
    A11 --> B12
    A12 --> B12
    A12 --> B13
    A13 --> B13
    A13 --> B14
    A14 --> B14
    A14 --> B15
    A15 --> B15
    A15 --> B16
    A16 --> B16
    A16 --> B17
    A17 --> B17
    A17 --> B18
    A18 --> B18
    A18 --> B19
    A19 --> B19
    A20 --> B20
    A20 --> B21
    A21 --> B22
    A22 --> B23
    A23 --> B24
    A24 --> B25
    A25 --> B26
    A26 --> B27
    A27 --> B28
    A28 --> B29
    A29 --> B30
    A30 --> B30
    A30 --> B31
    A31 --> B32
    A32 --> B33
    A33 --> B34
    A34 --> B35
    A35 --> B36
    A36 --> B37
    A37 --> B38
    A38 --> B39
    A39 --> B40
    A40 --> B40
    A40 --> B41
    A41 --> B41
    A42 --> B42
    A43 --> B43
    A44 --> B44
    A45 --> B45
    A46 --> B46
    A47 --> B47
    A48 --> B48
    A49 --> B49
    A50 --> B50

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

■ 3 Outdoor Units-3∅, 380-415V

■ When the power source is connected In series between the units.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Power Line (4 Wires Cable)"]
    E["Power supply 1 Phase 50Hz 220-240V"] --> F["Pull Box (Installer option)"]
    F --> G["Power Line (2 Wires Cable)"]
    G --> H["Power Line (2 Wires Cable)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Power Line (2 Wires Cable)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Power Line (2 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["R S T N"]
    A --> C["Switch"]
    A --> D["Fuse"]
    E["Power supply 1 Phase 50Hz 220-240V"] --> F["L N"]
    B --> G["Power Line (2 Wires Cable)"]
    C --> H["Power Line (4 Wires Cable)"]
    G --> I["Pull Box (Installer option)"]
    H --> J["Pull Box (Installer option)"]
    I --> K["Power Line (2 Wires Cable)"]
    J --> L["Power Line (2 Wires Cable)"]
    K --> M["Communication Line (3 Wires Cable)"]
    L --> N["Communication Line (3 Wires Cable)"]
    O["[Master"]] --> P["Power Line"]
    Q["[Slave1"]] --> R["Power Line"]
    S["[Slave2"]] --> T["Power Line"]
    U["[Master"]] --> V["Power Line"]
    W["[Slave1"]] --> X["Power Line"]
    Y["[Slave2"]] --> Z["Power Line"]
    AA["[Master"]] --> AB["Power Line"]
    AC["[Slave1"]] --> AD["Power Line"]
    AE["[Slave2"]] --> AF["Power Line"]
    AG["Power Line (2 Wires Cable)"] --> AH["Power Line (2 Wires Cable)"]
    AI["Power Line (2 Wires Cable)"] --> AJ["Power Line (2 Wires Cable)"]
    AK["Power Line (2 Wires Cable)"] --> AL["Power Line (2 Wires Cable)"]
    AM["Power Line (2 Wires Cable)"] --> AN["Power Line (2 Wires Cable)"]
    AO["Power Line (2 Wires Cable)"] --> AP["Power Line (2 Wires Cable)"]
    AQ["Power Line (2 Wires Cable)"] --> AR["Power Line (2 Wires Cable)"]
    AS["Power Line (2 Wires Cable)"] --> AT["Power Line (2 Wires Cable)"]
    AU["Power Line (2 Wires Cable)"] --> AV["Power Line (2 Wires Cable)"]
    AW["Power Line (2 Wires Cable)"] --> AX["Power Line (2 Wires Cable)"]
    AY["Power Line (4 Wires Cable)"] --> AZ["Pull Box (Installer option)"]
    BA["Pull Box (Installer option)"] --> BB["Pull Box (Installer option)"]
    BC["Pull Box (Installer option)"] --> BD["Pull Box (Installer option)"]
    BE["Pull Box (Installer option)"] --> BF["Pull Box (Installer option)"]
    BG["Pull Box (Installer option)"] --> BH["Pull Box (Installer option)"]
    BI["Pull Box (Installer option)"] --> BJ["Pull Box (Installer option)"]
    BK["Pull Box (Installer option)"] --> BL["Pull Box (Installer option)"]
    BM["Pull Box (Installer option)"] --> BN["Pull Box (Installer option)"]
    BO["Pull Box (Installer option)"] --> BP["Pull Box (Installer option)"]
    BP["Pull Box (Installer option)"] --> BQ["Pull Box (Installer option)"]
    BR["Pull Box (Installer option)"] --> BS["Pull Box (Installer option)"]
    BT["Pull Box (Installer option)"] --> BU["Pull Box (Installer option)"]
    BV["Pull Box (Installer option)"] --> BW["Pull Box (Installer option)"]
    BX["Pull Box (Installer option)"] --> BY["Pull Box (Installer option)"]
    BZ["Pull Box (Installer option)"] --> CA["Pull Box (Installer option)"]
    CB["Pull Box (Installer option)"] --> CC["Pull Box (Installer option)"]
    DD["Pull Box (Installer option)"] --> DE["Pull Box (Installer option)"]
    BEQ["Pull Box (Installer option)"] --> BEQ["Pull Box (Installer option)"]
    BFQ["Pull Box (Installer option)"] --> BFQ["Pull Box (Installer option)"]
    BGQ["Pull Box (Installer option)"] --> BGQ["Pull Box (Installer option)"]
    BHQ["Pull Box (Installer option)"] --> BHQ["Pull Box (Installer option)"]
    BIQP["Pull Box (Installer option)"] --> BIQP["Pull Box (Installer option)"]
    BJQP["Pull Box (Installer option)"] --> BJQP["Pull Box (Installer option)"]
    BKQP["Pull Box (Installer option)"] --> BKQP["Pull Box (Installer option)"]
    BLQP["Pull Box (Installer option)"] --> BLQP["Pull Box (Installer option)"]
    BNQP["Pull Box (Installer option)"] --> BNQP["Pull Box (Installer option)"]
    BOQP["Pull Box (Installer option)"] --> BOQP["Pull Box (Installer option)"]
    BPQP["Pull Box (Installer option)"] --> BPQP["Pull Box (Installer option)"]
    BQQP["Pull Box (Installer option)"] --> BQQP["Pull Box (Installer option)"]
    ACQP["Pull Box (Installer option)"] --> ACQP["Pull Box (Installer option)"]
    ADQP["Pull Box (Installer option)"] --> ADQP["Pull Box (Installer option)"]
    AEQP["Pull Box (Installer option)"] --> AEQP["Pull Box (Installer option)"]
    AFQP["Pull Box (Installer option)"] --> AFQP["Pull Box (Installer option)"]
    AGQP["Pull Box (Installer option)"] --> AGQP["Pull Box (Installer option)"]
    AHQP["Pull Box (Installer option)"] --> AHQP["Pull Box (Installer option)"]
    AIQP["Pull Box (Installer option)"] --> AIQP["Pull Box (Installer option)"]
    AJQP["Pull Box (Installer option)"] --> AJQP["Pull Box (Installer option)"]
    AKQP["Pull Box (Installer option)"] --> AKQP["Pull Box (Installer option)"]
    ALQP["Pull Box (Installer option)"] --> ALQP["Pull Box (Installer option)"]
    AMQP["Pull Box (Installer option)"] --> AMQP["Pull Box (Installer option)"]
    ANQP["Pull Box (Installer option)"] --> ANQP["Pull Box (Installer option)"]
    AOQP["Pull Box (Installer option)"] --> AOQP["Pull Box (Installer option)"]
    APQP["Pull Box (Installer option)"] --> APQP["Pull Box (Installer option)"]
    AQP["Pull Box (Installer option)"] --> AQP["Pull Box (Installer option)"]
    ARQP["Pull Box (Installer option)"] --> ARQP["Pull Box (Installer option)"]
    ASQP["Pull Box (Installed) [Indoor Units"]]
    AT["Power Line"] --> AU["Power Line"]
    AU --> AV["Power Line"]
    AW["Power Line"] --> AX["Power Line"]
    AX --> AY["Power Line"]
    AZ["Power Line"] --> BA["Power Line"]
    BA --> BB["Power Line"]
    BC["Power Line"] --> BD["Power Line"]
    BD --> BE["Power Line"]
    BF["Power Line"] --> BG["Power Line"]
    BG --> BH["Power Line"]
    BI["Power Line"] --> BJ["Power Line"]
    BJ --> BK["Power Line"]
    BL["Power Line"] --> BM["Power Line"]
    BM --> BN["Power Line"]
    BO["Power Line"] --> BP["Power Line"]
    BP --> BQ["Power Line"]
    BR["Power Line"] --> BS["Power Line"]
    BS --> BT["Power Line"]
    BU["Power Line"] --> BV["Power Line"]
    BV --> BW["Power Line"]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

graph TD
    A["SODU IDU"] --> B["Master Outdoor Unit"]
    A --> C["SODU IDU"]
    A --> D["Slave1 Outdoor Unit"]
    A --> E["Slave2 Outdoor Unit"]

    subgraph Master Outdoor Unit
        B1["B"] & A1["A"] --> B1
        B1 --> A1
    end

    subgraph Slave1 Outdoor Unit
        C1["B"] & A2["A"] --> C1
        C1 --> A2
    end

    subgraph Slave2 Outdoor Unit
        D1["B"] & A3["A"] --> D1
        D1 --> A3
    end

    B1 --> C1
    A1 --> D1
    B1 --> E1
    A2 --> E1
    B2["A"] --> C2["B"]
    A3 --> C2
    B3["A"] --> C3["B"]
    A4["A"] --> C4["A"]
    B4["A"] --> C5["B"]
    C5 --> E1

■ 4 Outdoor Units - 3∅, 380-415V

■ When the power source is connected In series between the units.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Master"]
    D --> E["Slave1"]
    D --> F["Slave2"]
    D --> G["Slave3"]
    H["Power supply 1 Phase 50Hz 220-240V"] --> I["Pull Box (Installer option)"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Pull Box (Installer option)"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Pull Box (Installer option)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Pull Box (Installer option)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Pull Box (Installer option)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]
    DY --> DXB["Power Line (2 Wires Cable)"]

[Indoor Units]

WARNING

When the total capacity is over than as follow, the power source do not use in series between the units. The First terminal block could be burnt out. (Heat Pump : 68 Hp, Cooling Only : 62 Hp)

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 50Hz 380-415V (Main Switch)"] --> B["Switch"]
    A --> C["Fuse"]
    D["Power supply 1 Phase 50Hz 220-240V"] --> E["Power Line (2 Wires Cable)"]
    E --> F["Power Line (4 Wires Cable)"]
    F --> G["Power Line (2 Wires Cable)"]
    G --> H["Pull Box (Installer option)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Pull Box (Installer option)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Pull Box (Installer option)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Communication Line (3 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Pull Box (Installer option)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Pull Box (Installer option)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Pull Box (Installer option)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Pull Box (Installer option)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Pull Box (Installer option)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Pull Box (Installer option)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Pull Box (Installer option)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Pull Box (Installer option)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Pull Box (Installer option)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Pull Box (Installer option)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Pull Box (Installer option)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Pull Box (Installer option)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Pull Box (Installer option)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Pull Box (Installer option)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Pull Box (Installer option)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Pull Box (Installer option)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Pull Box (Installer option)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Pull Box (Installer option)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Pull Box (Installer option)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Pull Box (Installer option)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Pull Box (Installer option)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Pull Box (Installer option)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Pull Box (Installer option)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Pull Box (Installer option)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Pull Box (Installer option)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Pull Box (Installer option)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Pull Box (Installer option)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Pull Box (Installer option)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Pull Box (Installer option)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Pull Box (Installer option)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Pull Box (Installer option)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Pull Box (Installer option)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Pull Box (Installer option)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Pull Box (Installer option)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Pull Box (Installer option)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Pull Box (Installer option)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Pull Box (Installer option)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Pull Box (Installer option)"]
    CL --> CD
    style A fill:#f9f,stroke:#333
    style D fill:#f9f,stroke:#333
    style E fill:#ccf,stroke:#333
    style F fill:#cfc,stroke:#333
    style G fill:#fcc,stroke:#333
    style H fill:#cff,stroke:#333
    style I fill:#ffc,stroke:#333
    style J fill:#ffc,stroke:#333
    style K fill:#ffc,stroke:#333
    style L fill:#ffc,stroke:#333
    style M fill:#ffc,stroke:#333
    style N fill:#ffc,stroke:#333
    style O fill:#ffc,stroke:#333
    style P fill:#ffc,stroke:#333
    style Q fill:#ffc,stroke:#333
    style R fill:#ffc,stroke:#333
    style S fill:#ffc,stroke:#333
    style T fill:#ffc,stroke:#333
    style U fill:#ffc,stroke:#333
    style V fill:#ffc,stroke:#333
    style W fill:#ffc,stroke:#333
    style X fill:#ffc,stroke:#333
    style Y fill:#ffc,stroke:#333
    style Z fill:#ffc,stroke:#333
    style AA fill:#ffc,stroke:#333
    style AB fill:#ffc,stroke:#333
    style AC fill:#ffc,stroke:#333
    style AD fill:#ffc,stroke:#333
    style AE fill:#ffc,stroke:#333
    style AF fill:#ffc,stroke:#333
    style AG fill:#ffc,stroke:#333
    style AH fill:#ffc,stroke:#333
    style AI fill:#ffc,stroke:#333

[Indoor Units]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

Diagram showing three identical electronic device layouts with numbered connectors and wiring connections

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

graph TD
    subgraph Slave1
        S0["SODU IDU INTERNET DRY1 DRY2 GND 12V"] --> B0["B"]
        S0 --> A0["A"]
        S0 --> B0["B"]
        S0 --> A0["A"]
        S0 --> B0["B"]
        S0 --> A0["A"]
    end
    subgraph Slave2
        S0["SODU IDU INTERNET DRY1 DRY2 GND 12V"] --> B1["B"]
        S0 --> A1["A"]
        S0 --> B1["B"]
        S0 --> A1["A"]
        S0 --> B1["B"]
        S0 --> A1["A"]
    end
    subgraph Slave3
        S0["SODU IDU INTERNET DRY1 DRY2 GND 12V"] --> B2["B"]
        S0 --> A2["A"]
        S0 --> B2["B"]
        S0 --> A2["A"]
        S0 --> B2["B"]
        S0 --> A2["A"]
    end

2. 60 ~Hz

◆ Example Connection of Communication Cable

■ 1 Outdoor Unit - 30, 380V

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Outdoor Unit"]
    E["Power supply 1 Phase 60Hz 220V"] --> F["Pull Box (Installer option)"]
    F --> G["Power Line (2 Wires Cable)"]
    G --> H["Pull Box (Installer option)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Communication Line (3 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Pull Box (Installer option)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Communication Line (3 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Pull Box (Installer option)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Communication Line (3 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Pull Box (Installer option)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Communication Line (3 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Pull Box (Installer option)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Communication Line (3 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Pull Box (Installer option)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Communication Line (3 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Pull Box (Installer option)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Communication Line (3 Wires Cable)"]

[Indoor Units]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
  Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

Diagram showing three identical electronic components with labeled pins 3, 4, and connection lines

The GND terminal at the main PCB is a ^+ terminal for day contact, it is not the point to make ground connection.

■ 2 Outdoor Units - 30, 380V

■ When the power source is connected In series between the units.

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Power Line (4 Wires Cable)"]
    D --> E["Master"]
    D --> F["Slave"]
    G["Power supply 1 Phase 60Hz 220V"] --> H["Pull Box (Installer option)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Power Line (2 Wires Cable)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Power Line (2 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    A --> C["Power Supply 1 Phase 60Hz 220V"]
    B --> D["Fuse"]
    C --> E["Fuse"]
    D --> F["R S T N"]
    E --> G["R S T N"]
    F --> H["Power Line (2 Wires Cable)"]
    G --> I["Power Line (4 Wires Cable)"]
    H --> J["Power Line (2 Wires Cable)"]
    I --> K["Power Line (2 Wires Cable)"]
    J --> L["Pull Box (Installer option)"]
    K --> M["Pull Box (Installer option)"]
    L --> N["Power Line (2 Wires Cable)"]
    M --> O["Power Line (2 Wires Cable)"]
    N --> P["Power Line (2 Wires Cable)"]
    O --> Q["Power Line (2 Wires Cable)"]
    P --> R["Power Line (2 Wires Cable)"]
    Q --> S["Power Line (2 Wires Cable)"]
    R --> T["Power Line (2 Wires Cable)"]
    S --> U["Power Line (2 Wires Cable)"]
    T --> V["Power Line (2 Wires Cable)"]
    U --> W["Power Line (2 Wires Cable)"]
    V --> X["Power Line (2 Wires Cable)"]
    W --> Y["Power Line (2 Wires Cable)"]
    X --> Z["Power Line (2 Wires Cable)"]
    Y --> AA["Power Line (2 Wires Cable)"]
    Z --> AB["Power Line (2 Wires Cable)"]
    AA --> AC["Power Line (2 Wires Cable)"]
    AB --> AD["Power Line (2 Wires Cable)"]
    AC --> AE["Power Line (2 Wires Cable)"]
    AD --> AF["Power Line (2 Wires Cable)"]
    AE --> AG["Power Line (2 Wires Cable)"]
    AF --> AH["Power Line (2 Wires Cable)"]
    AG --> AI["Power Line (2 Wires Cable)"]
    AH --> AJ["Power Line (2 Wires Cable)"]
    AI --> AK["Power Line (2 Wires Cable)"]
    AJ --> AL["Power Line (2 Wires Cable)"]
    AK --> AM["Power Line (2 Wires Cable)"]
    AL --> AN["Power Line (2 Wires Cable)"]
    AM --> AO["Power Line (2 Wires Cable)"]
    AN --> AP["Power Line (2 Wires Cable)"]
    AO --> AQ["Power Line (2 Wires Cable)"]
    AP --> AR["Power Line (2 Wires Cable)"]
    AQ --> AS["Power Line (2 Wires Cable)"]
    AR --> AT["Power Line (2 Wires Cable)"]
    AS --> AU["Power Line (2 Wires Cable)"]
    AT --> AV["Power Line (2 Wires Cable)"]
    AU --> AW["Power Line (2 Wires Cable)"]
    AV --> AX["Power Line (2 Wires Cable)"]
    AW --> AY["Power Line (2 Wires Cable)"]
    AX --> AZ["Power Line (2 Wires Cable)"]
    AY --> BA["Power Line (2 Wires Cable)"]
    AZ --> BB["Power Line (2 Wires Cable)"]
    BA --> BC["Power Line (2 Wires Cable)"]
    BB --> BD["Power Line (2 Wires Cable)"]
    BC --> BE["Power Line (2 Wires Cable)"]
    BD --> BF["Power Line (2 Wires Cable)"]
    BE --> BG["Power Line (2 Wires Cable)"]
    BF --> BH["Power Line (2 Wires Cable)"]
    BG --> BI["Power Line (2 Wires Cable)"]
    BH --> BJ["Power Line (2 Wires Cable)"]
    BI --> BK["Power Line (2 Wires Cable)"]
    BJ --> BL["Power Line (2 Wires Cable)"]
    BK --> BM["Power Line (2 Wires Cable)"]
    BL --> BN["Power Line (2 Wires Cable)"]
    BM --> BO["Power Line (2 Wires Cable)"]
    BN --> BP["Power Line (2 Wires Cable)"]
    BO --> BQ["Power Line (2 Wires Cable)"]
    BP --> BR["Power Line (2 Wires Cable)"]
    BQ --> BS["Power Line (2 Wires Cable)"]
    BR --> BT["Power Line (2 Wires Cable)"]
    BS --> BU["Power Line (2 Wires Cable)"]
    BT --> BV["Power Line (2 Wires Cable)"]
    BU --> BW["Power Line (2 Wires Cable)"]
    BV --> BX["Power Line (2 Wires Cable)"]
    BW --> BY["Power Line (2 Wires Cable)"]
    BX --> BZ["Power Line (2 Wires Cable)"]
    BY --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DM["Power Line (2 Wires Cable)"]
    DM --> DU["Power Line (2 Wires Cable)"]
    DU --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
  Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
  • Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

graph TD
    subgraph Master Outdoor Unit
        A1["SODU IDU"] --> B1["3"]
        A1 --> B2["4"]
        A1 --> B3["8"]
        A1 --> B4["3"]
    end
    subgraph Slave Outdoor Unit
        C1["SODU IDU"] --> D1["5"]
        C1 --> D2["6"]
        C1 --> D3["7"]
        C1 --> D4["8"]
        C1 --> D5["9"]
        C1 --> D6["10"]
        C1 --> D7["11"]
        C1 --> D8["12"]
    end
    A1 --> B1
    A1 --> B2
    A1 --> B3
    A1 --> B4
    A1 --> B5
    A1 --> B6
    A1 --> B7
    A1 --> B8
    A1 --> B9
    A1 --> B10
    A1 --> B11
    A1 --> B12
    A1 --> B13
    A1 --> B14
    A1 --> B15
    A1 --> B16
    A1 --> B17
    A1 --> B18
    A1 --> B19
    A1 --> B20
    A1 --> B21
    A1 --> B22
    A1 --> B23
    A1 --> B24
    A1 --> B25
    A1 --> B26
    A1 --> B27
    A1 --> B28
    A1 --> B29
    A1 --> B30
    A1 --> B31
    A1 --> B32
    A1 --> B33
    A1 --> B34
    A1 --> B35
    A1 --> B36
    A1 --> B37
    A1 --> B38
    A1 --> B39
    A1 --> B40
    A1 --> B41
    A1 --> B42
    A1 --> B43
    A1 --> B44
    A1 --> B45
    A1 --> B46
    A1 --> B47
    A1 --> B48
    A1 --> B49
    A1 --> B50
    A1 --> B51
    A1 --> B52
    A1 --> B53
    A1 --> B54
    A1 --> B55
    A1 --> B56
    A1 --> B57
    A1 --> B58
    A1 --> B59
    A1 --> B60
    A1 --> B61
    A1 --> B62
    A1 --> B63
    A1 --> B64
    A1 --> B65
    A1 --> B66
    A1 --> B67
    A1 --> B68
    A1 --> B69
    A1 --> B70
    A1 --> B71
    A1 --> B72
    A1 --> B73
    A1 --> B74
    A1 --> B75
    A1 --> B76
    A1 --> B77
    A1 --> B78
    A1 --> B79
    A1 --> B80

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

■ 3 Outdoor Units - 3∅, 380V

■ When the power source is connected in series between the units.

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Power Line (4 Wires Cable)"]
    D --> E["Master"]
    E --> F["Slave1"]
    E --> G["Slave2"]
    H["Power supply 1 Phase 60Hz 220V"] --> I["Pull Box (Installer option)"]
    I --> J["Power Line (2 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Pull Box (Installer option)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Pull Box (Installer option)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Pull Box (Installer option)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Power Line (2 Wires Cable)"]
    R --> S["Communication Line (3 Wires Cable)"]
    S --> T["Indoor Units"]

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    A --> C["Power Line (2 Wires Cable)"]
    A --> D["Power Line (4 Wires Cable)"]
    B --> E["R S T N"]
    C --> F["Fuse"]
    D --> G["Power Line (2 Wires Cable)"]
    E --> H["R S T N"]
    F --> I["Fuse"]
    G --> J["Power Line (2 Wires Cable)"]
    H --> K["Power Line (4 Wires Cable)"]
    I --> L["Power Line (2 Wires Cable)"]
    J --> M["Power Line (2 Wires Cable)"]
    K --> N["Power Line (4 Wires Cable)"]
    L --> O["Power Line (2 Wires Cable)"]
    M --> P["Power Line (2 Wires Cable)"]
    N --> Q["Power Line (4 Wires Cable)"]
    O --> R["Power Line (2 Wires Cable)"]
    P --> S["Power Line (2 Wires Cable)"]
    Q --> T["Power Line (4 Wires Cable)"]
    R --> U["Power Line (2 Wires Cable)"]
    S --> V["Power Line (2 Wires Cable)"]
    T --> W["Power Line (2 Wires Cable)"]
    U --> X["Power Line (4 Wires Cable)"]
    V --> Y["Power Line (2 Wires Cable)"]
    W --> Z["Power Line (2 Wires Cable)"]
    X --> AA["Power Line (4 Wires Cable)"]
    Y --> AB["Power Line (2 Wires Cable)"]
    Z --> AC["Power Line (2 Wires Cable)"]
    AA --> AD["Power Line (4 Wires Cable)"]
    AB --> AE["Power Line (2 Wires Cable)"]
    AC --> AF["Power Line (2 Wires Cable)"]
    AD --> AG["Power Line (4 Wires Cable)"]
    AE --> AH["Power Line (2 Wires Cable)"]
    AF --> AI["Power Line (2 Wires Cable)"]
    AG --> AJ["Power Line (4 Wires Cable)"]
    AH --> AK["Power Line (2 Wires Cable)"]
    AI --> AL["Power Line (2 Wires Cable)"]
    AJ --> AM["Power Line (4 Wires Cable)"]
    AK --> AN["Power Line (2 Wires Cable)"]
    AL --> AO["Power Line (2 Wires Cable)"]
    AM --> AP["Power Line (4 Wires Cable)"]
    AN --> AQ["Power Line (2 Wires Cable)"]
    AO --> AR["Power Line (2 Wires Cable)"]
    AP --> AS["Power Line (4 Wires Cable)"]
    AQ --> AT["Power Line (2 Wires Cable)"]
    AR --> AU["Power Line (2 Wires Cable)"]
    AS --> AV["Power Line (4 Wires Cable)"]
    AT --> AW["Power Line (2 Wires Cable)"]
    AU --> AX["Power Line (2 Wires Cable)"]
    AV --> AY["Power Line (4 Wires Cable)"]
    AW --> AZ["Power Line (2 Wires Cable)"]
    AX --> BA["Power Line (2 Wires Cable)"]
    AY --> BB["Power Line (4 Wires Cable)"]
    AZ --> BC["Power Line (2 Wires Cable)"]
    BA --> BD["Power Line (2 Wires Cable)"]
    BB --> BE["Power Line (4 Wires Cable)"]
    BC --> BF["Power Line (2 Wires Cable)"]
    BE --> BG["Power Line (2 Wires Cable)"]
    BF --> BH["Power Line (4 Wires Cable)"]
    BG --> BI["Power Line (2 Wires Cable)"]
    BH --> BJ["Power Line (2 Wires Cable)"]
    BI --> BK["Power Line (4 Wires Cable)"]
    BJ --> BL["Power Line (2 Wires Cable)"]
    BK --> BM["Power Line (2 Wires Cable)"]
    BL --> BN["Power Line (4 Wires Cable)"]
    BM --> BO["Power Line (2 Wires Cable)"]
    BN --> BP["Power Line (2 Wires Cable)"]
    BO --> BQ["Power Line (4 Wires Cable)"]
    BP --> BR["Power Line (2 Wires Cable)"]
    BQ --> BS["Power Line (2 Wires Cable)"]
    BR --> BT["Power Line (4 Wires Cable)"]
    BS --> BU["Power Line (2 Wires Cable)"]
    BT --> BV["Power Line (2 Wires Cable)"]
    BU --> BW["Power Line (4 Wires Cable)"]
    BV --> BX["Power Line (2 Wires Cable)"]
    BW --> BY["Power Line (2 Wires Cable)"]
    BX --> BZ["Power Line (4 Wires Cable)"]
    BY --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (4 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (4 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (4 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (4 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (4 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (4 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (4 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (4 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (4 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (4 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (4 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (4 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DM["Power Line (4 Wires Cable)"]
    DM --> DN["Power Line (2 Wires Cable)"]
    DN --> DO
    style A fill:#f9f,stroke:#333
    style BC fill:#f9f,stroke:#333
    style BD fill:#f9f,stroke:#333
    style BE fill:#f9f,stroke:#333
    style BF fill:#f9f,stroke:#333
    style BG fill:#f9f,stroke:#333
    style BH fill:#f9f,stroke:#333
    style BI fill:#f9f,stroke:#333
    style BJ fill:#f9f,stroke:#333
    style BK fill:#f9f,stroke:#333
    style BL fill:#f9f,stroke:#333
    style BM fill:#f9f,stroke:#333
    style BN fill:#f9f,stroke:#333
    style BO fill:#f9f,stroke:#333
    style BP fill:#f9f,stroke:#333
    style BQ fill:#ccf,stroke:#333
    style BR fill:#ccf,stroke:#333
    style CA fill:#ccf,stroke:#333
    style CB fill:#ccf,stroke:#333
    style CC fill:#ccf,stroke:#333
    style CD fill:#ccf,stroke:#333
    style DE fill:#ccf,stroke:#333
    style EF fill:#ccf,stroke:#333
    style GF fill:#ccf,stroke:#333
    style GH fill:#ccf,stroke:#333
    style BIJ fill:#ccf,stroke:#333
    style BJQ fill:#ccf,stroke:#333
    style BKJ fill:#ccf,stroke:#333
    style BLJ fill:#ccf,stroke:#333
    style BMJ fill:#ccf,stroke:#333
    style BNJ fill:#ccf,stroke:#333
    style BBJ fill:#ccf,stroke:#333
    style BCJ fill:#ccf,stroke:#333
    style BDJ fill:#ccf,stroke:#333
    style BEJ fill:#ccf,stroke:#333
    style BFJ fill:#ccf,stroke:#333
    style BGJ fill:#ccf,stroke:#333
    style BHJ fill:#ccf,stroke:#333
    style BIJQ fill:#ccf,stroke:#333
    style BJQ fill:#ccf,stroke:#333
    style BKJQ fill:#ccf,stroke:#333
    style BLJQ fill:#ccf,stroke:#333
    style BNJQ fill:#ccf,stroke:#333
    style BBJQ fill:#ccf,stroke:#333

</details>

![](images/00d1c35fb9c7240e3a36be9d468724692e4685c63fa83cf35e69a61c3f4922cb.jpg)

<h1 id="warning-24">WARNING</h1>

- Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).   
- Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.   
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.   
- If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.   
Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit 

<table><tr><td colspan="2">SODU IDU</td><td colspan="4">INTERNET DRY1 DRY2 GND 12V</td><td></td><td></td><td></td></tr><tr><td>B</td><td>A</td><td>B</td><td>A</td><td>B</td><td>A</td><td></td><td></td><td></td></tr></table>

Master Outdoor Unit

![](images/91d6e6ca65eb2e3bc16f2365861e8aa89f447ca3b17aedfe76fabd0a1ccaed3a.jpg)

<details>
<summary>text_image</summary>

Diagram showing three Ethernet cable connectors with labeled pins 3 and 4 connected to a central connector.
</details>

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

<table><tr><td colspan="2">SODU IDU</td><td colspan="4">INTERNET DRY1 DRY2 GND 12V</td><td></td><td></td><td></td></tr><tr><td>B</td><td>A</td><td>B</td><td>A</td><td>B</td><td>A</td><td></td><td></td><td></td></tr></table>

Master
Outdoor Unit

<table><tr><td colspan="2">SODU IDU</td><td colspan="4">INTERNET DRY1 DRY2 GND 12V</td><td></td><td></td><td></td></tr><tr><td>B</td><td>A</td><td>B</td><td>A</td><td>B</td><td>A</td><td></td><td></td><td></td></tr></table>

Slave1
Outdoor Unit

<table><tr><td colspan="2">SODU IDU</td><td colspan="4">INTERNET DRY1 DRY2 GND 12V</td><td></td><td></td><td></td></tr><tr><td>B</td><td>A</td><td>B</td><td>A</td><td>B</td><td>A</td><td></td><td></td><td></td></tr></table>

Slave2
Outdoor Unit

<h1 id="4-outdoor-units-3-380v">■ 4 Outdoor Units - 3∅, 380V</h1>

■ When the power source is connected in series between the units.

![](images/6ef079fd47e314ed1cc38560965b14f8c128cc1388b2f388c3b1f154954865cb.jpg)

<details>
<summary>flowchart</summary>

```mermaid
graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    B --> C["Fuse"]
    C --> D["Power Line (4 Wires Cable)"]
    D --> E["Master"]
    E --> F["Slave1"]
    E --> G["Slave2"]
    E --> H["Slave3"]
    I["Power supply 1 Phase 60Hz 220V"] --> J["L"]
    J --> K["N"]
    K --> L["Power Line (2 Wires Cable)"]
    L --> M["Pull Box (Installer option)"]
    M --> N["Power Line (2 Wires Cable)"]
    N --> O["Pull Box (Installer option)"]
    O --> P["Pull Box (Installer option)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Pull Box (Installer option)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (2 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (2 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (2 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (2 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (2 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (2 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (2 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (2 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (2 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (2 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (2 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (2 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (2 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (2 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (2 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (2 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (2 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (2 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (2 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (2 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (2 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (2 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (2 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (2 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (2 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (2 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (2 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (2 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (2 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (2 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (2 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (2 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (2 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (2 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (2 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (2 Wires Cable)"]
    CL --> CM["Power Line (2 Wires Cable)"]
    CM --> CN["Power Line (2 Wires Cable)"]
    CN --> CO["Power Line (2 Wires Cable)"]
    CO --> CP["Power Line (2 Wires Cable)"]
    CP --> CQ["Power Line (2 Wires Cable)"]
    CQ --> CR["Power Line (2 Wires Cable)"]
    CR --> CS["Power Line (2 Wires Cable)"]
    CS --> CT["Power Line (2 Wires Cable)"]
    CT --> CU["Power Line (2 Wires Cable)"]
    CU --> CV["Power Line (2 Wires Cable)"]
    CV --> CW["Power Line (2 Wires Cable)"]
    CW --> CX["Power Line (2 Wires Cable)"]
    CX --> CY["Power Line (2 Wires Cable)"]
    CY --> CZ["Power Line (2 Wires Cable)"]
    CZ --> DA["Power Line (2 Wires Cable)"]
    DA --> DB["Power Line (2 Wires Cable)"]
    DB --> DC["Power Line (2 Wires Cable)"]
    DC --> DD["Power Line (2 Wires Cable)"]
    DD --> DE["Power Line (2 Wires Cable)"]
    DE --> DF["Power Line (2 Wires Cable)"]
    DF --> DG["Power Line (2 Wires Cable)"]
    DG --> DH["Power Line (2 Wires Cable)"]
    DH --> DI["Power Line (2 Wires Cable)"]
    DI --> DJ["Power Line (2 Wires Cable)"]
    DJ --> DK["Power Line (2 Wires Cable)"]
    DK --> DL["Power Line (2 Wires Cable)"]
    DL --> DV["Power Line (2 Wires Cable)"]
    DV --> DW["Power Line (2 Wires Cable)"]
    DW --> DX["Power Line (2 Wires Cable)"]
    DX --> DY["Power Line (2 Wires Cable)"]

WARNING

When the total capacity is over than as follow, the power source do not use in series between the units. The First terminal block could be burnt out. (Heat Pump : 68 Hp, Cooling Only : 62 Hp)

■ When the power source is supplied to Each outdoor unit individually.

graph TD
    A["3 Phase 4 Wires Power supply 60Hz 380V (Main Switch)"] --> B["Switch"]
    A --> C["Fuse"]
    D["Power supply 1 Phase 60Hz 220V"] --> E["Power Line (2 Wires Cable)"]
    E --> F["Power Line (4 Wires Cable)"]
    F --> G["Power Line (2 Wires Cable)"]
    G --> H["Power Line (3 Wires Cable)"]
    H --> I["Power Line (2 Wires Cable)"]
    I --> J["Power Line (4 Wires Cable)"]
    J --> K["Power Line (2 Wires Cable)"]
    K --> L["Power Line (3 Wires Cable)"]
    L --> M["Power Line (2 Wires Cable)"]
    M --> N["Power Line (4 Wires Cable)"]
    N --> O["Power Line (2 Wires Cable)"]
    O --> P["Power Line (3 Wires Cable)"]
    P --> Q["Power Line (2 Wires Cable)"]
    Q --> R["Power Line (3 Wires Cable)"]
    R --> S["Power Line (2 Wires Cable)"]
    S --> T["Power Line (3 Wires Cable)"]
    T --> U["Power Line (2 Wires Cable)"]
    U --> V["Power Line (3 Wires Cable)"]
    V --> W["Power Line (2 Wires Cable)"]
    W --> X["Power Line (3 Wires Cable)"]
    X --> Y["Power Line (2 Wires Cable)"]
    Y --> Z["Power Line (3 Wires Cable)"]
    Z --> AA["Power Line (2 Wires Cable)"]
    AA --> AB["Power Line (3 Wires Cable)"]
    AB --> AC["Power Line (2 Wires Cable)"]
    AC --> AD["Power Line (3 Wires Cable)"]
    AD --> AE["Power Line (2 Wires Cable)"]
    AE --> AF["Power Line (3 Wires Cable)"]
    AF --> AG["Power Line (2 Wires Cable)"]
    AG --> AH["Power Line (3 Wires Cable)"]
    AH --> AI["Power Line (2 Wires Cable)"]
    AI --> AJ["Power Line (3 Wires Cable)"]
    AJ --> AK["Power Line (2 Wires Cable)"]
    AK --> AL["Power Line (3 Wires Cable)"]
    AL --> AM["Power Line (2 Wires Cable)"]
    AM --> AN["Power Line (3 Wires Cable)"]
    AN --> AO["Power Line (2 Wires Cable)"]
    AO --> AP["Power Line (3 Wires Cable)"]
    AP --> AQ["Power Line (2 Wires Cable)"]
    AQ --> AR["Power Line (3 Wires Cable)"]
    AR --> AS["Power Line (2 Wires Cable)"]
    AS --> AT["Power Line (3 Wires Cable)"]
    AT --> AU["Power Line (2 Wires Cable)"]
    AU --> AV["Power Line (3 Wires Cable)"]
    AV --> AW["Power Line (2 Wires Cable)"]
    AW --> AX["Power Line (3 Wires Cable)"]
    AX --> AY["Power Line (2 Wires Cable)"]
    AY --> AZ["Power Line (3 Wires Cable)"]
    AZ --> BA["Power Line (2 Wires Cable)"]
    BA --> BB["Power Line (3 Wires Cable)"]
    BB --> BC["Power Line (2 Wires Cable)"]
    BC --> BD["Power Line (3 Wires Cable)"]
    BD --> BE["Power Line (2 Wires Cable)"]
    BE --> BF["Power Line (3 Wires Cable)"]
    BF --> BG["Power Line (2 Wires Cable)"]
    BG --> BH["Power Line (3 Wires Cable)"]
    BH --> BI["Power Line (2 Wires Cable)"]
    BI --> BJ["Power Line (3 Wires Cable)"]
    BJ --> BK["Power Line (2 Wires Cable)"]
    BK --> BL["Power Line (3 Wires Cable)"]
    BL --> BM["Power Line (2 Wires Cable)"]
    BM --> BN["Power Line (3 Wires Cable)"]
    BN --> BO["Power Line (2 Wires Cable)"]
    BO --> BP["Power Line (3 Wires Cable)"]
    BP --> BQ["Power Line (2 Wires Cable)"]
    BQ --> BR["Power Line (3 Wires Cable)"]
    BR --> BS["Power Line (2 Wires Cable)"]
    BS --> BT["Power Line (3 Wires Cable)"]
    BT --> BU["Power Line (2 Wires Cable)"]
    BU --> BV["Power Line (3 Wires Cable)"]
    BV --> BW["Power Line (2 Wires Cable)"]
    BW --> BX["Power Line (3 Wires Cable)"]
    BX --> BY["Power Line (2 Wires Cable)"]
    BY --> BZ["Power Line (3 Wires Cable)"]
    BZ --> CA["Power Line (2 Wires Cable)"]
    CA --> CB["Power Line (3 Wires Cable)"]
    CB --> CC["Power Line (2 Wires Cable)"]
    CC --> CD["Power Line (3 Wires Cable)"]
    CD --> CE["Power Line (2 Wires Cable)"]
    CE --> CF["Power Line (3 Wires Cable)"]
    CF --> CG["Power Line (2 Wires Cable)"]
    CG --> CH["Power Line (3 Wires Cable)"]
    CH --> CI["Power Line (2 Wires Cable)"]
    CI --> CJ["Power Line (3 Wires Cable)"]
    CJ --> CK["Power Line (2 Wires Cable)"]
    CK --> CL["Power Line (3 Wires Cable)"]
    CL --> CD
    style A fill:#f9f,stroke:#333
    style BC fill:#ccf,stroke:#333
    style BD fill:#cfc,stroke:#333
    style BE fill:#fcc,stroke:#333
    style BF fill:#cff,stroke:#333
    style BG fill:#ffc,stroke:#333
    style BH fill:#fcf,stroke:#333
    style BI fill:#cff,stroke:#333
    style BJ fill:#ffc,stroke:#333
    style BK fill:#cff,stroke:#333
    style BL fill:#ffc,stroke:#333
    style BG fill:#ffc,stroke:#333
    style BH fill:#ffc,stroke:#333
    style BI fill:#ffc,stroke:#333
    style BJ fill:#ffc,stroke:#333
    style BK fill:#ffc,stroke:#333
    style BL fill:#ffc,stroke:#333
    style BG fill:#ffc,stroke:#333
    style BH fill:#ffc,stroke:#333
    style BI fill:#ffc,stroke:#333
    style BJ fill:#ffc,stroke:#333
    style BK fill:#ffc,stroke:#333
    style BL fill:#ffc,stroke:#333
    note right of A: [Master]
    note right of B: [Slave1]
    note right of C: [Slave2]
    note right of D: [Slave3]
        Power Supply 1 Phase 60Hz 220V
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply 1 Phase 60Hz 50Hz 50Hz
        Power Supply A: [Master]
        Power Supply B: [Slave1]
        Power Supply C: [Slave2]
        Power Supply D: [Slave3]
        Power Supply E: [Master]
        Power Supply F: [Slave1]
        Power Supply G: [Slave2]
        Power Supply H: [Slave3]
        Power Supply I: [Master]
        Power Supply J: [Slave1]
        Power Supply K: [Slave2]
        Power Supply L: [Slave3]
        Power Supply M: [Master]
        Power Supply N: [Slave1]
        Power Supply O: [Slave2]
        Power Supply P: [Slave3]
        Power Supply Q: [Master]
        Power Supply R: [Slave1]
        Power Supply S: [Slave2]
        Power Supply T: [Slave3]
        Power Supply U: [Master]
        Power Supply V: [Slave1]
        Power Supply W: [Slave2]
        Power Supply X: [Slave3]
        Power Supply Y: [Master]
        Power Supply Z: [Slave1]
        Power Supply AA: [Slave2]
        Power Supply AB: [Slave3]
        Power Supply AC: [Master]
        Power Supply AD: [Slave1]
        Power Supply AE: [Slave2]
        Power Supply AF: [Slave3]
        Power Supply AG: [Master]
        Power Supply AH: [Slave1]
        Power Supply AI: [Slave2]
        Power Supply AJ: [Slave3]
        Power Supply AK: [Master]
        Power Supply AL: [Slave1]
        Power Supply AM: [Slave2]
        Power Supply ANA: [Slave3]
        Power Supply AO: [Master]
        Power Supply AP: [Slave1]
        Power Supply AQ: [Slave2]
        Power Supply ARN: [Slave3]
        Power Supply ASN: [Master]
        Power Supply AZN: [Slave1]
        Power Supply BAAN: [Slave2]
        Power Supply BBAN: [Slave3]
        Power Supply BCAN: [Master]
        Power Supply BDAN: [Slave1]
        Power Supply BEAN: [Slave2]
        Power Supply BFAN: [Slave3]
        Power Supply BGAN: [Master]
        Power Supply BHAN: [Slave1]
        Power Supply BIAN: [Slave2]
        Power Supply BJAN: [Slave3]
        Power Supply BKAN: [Master]
        Power Supply BLAN: [Slave1]
        Power Supply BNAN: [Slave2]
        Power Supply BOAN: [Slave3]
        Power Supply BPAN: [Master]
        Power Supply BBNAN: [Slave1]
        Power Supply BNBNAN: [Slave2]
        Power Supply BOBNAN: [Slave3]
        Power Supply BPBNAN: [Master]

WARNING

• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
  Running the product in reversed phase may break the compressor and other parts.

Between Indoor and Master Outdoor unit

Diagram showing three identical Ethernet cable connectors with labeled pins 3 and 4, connected to a terminal block.

The GND terminal at the main PCB is a '-' terminal for dry contact.

It is not the point to make ground connection.

- Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)

◆ Example Connection of Communication Cable

[BUS type]

- Connection of communication cable must be installed like below figure between indoor unit to outdoor unit.

[STAR type]

- Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).

graph TD
    A["Server"] --> B["Base Station 1"]
    A --> C["Base Station 2"]
    A --> D["Base Station 3"]
    A --> E["Base Station 4"]
    A --> F["Base Station 5"]
    A --> G["Base Station 6"]
    A --> H["Base Station 7"]
    A --> I["Base Station 8"]
    A --> J["Base Station 9"]
    A --> K["Base Station 10"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#ccf,stroke:#333
    style F fill:#ccf,stroke:#333
    style G fill:#ccf,stroke:#333
    style H fill:#ccf,stroke:#333
    style I fill:#ccf,stroke:#333
    style J fill:#ccf,stroke:#333
    style K fill:#ccf,stroke:#333
    style L fill:#ccf,stroke:#333

graph TD
    A["Server Rack"] --> B["Switch"]
    B --> C["Base Station 1"]
    B --> D["Base Station 2"]
    B --> E["Base Station 3"]
    B --> F["Base Station 4"]
    B --> G["Base Station 5"]
    B --> H["Base Station 6"]
    B --> I["Base Station 7"]
    B --> J["Base Station 8"]
    B --> K["Base Station 9"]
    B --> L["Base Station 10"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#cfc,stroke:#333
    style E fill:#cfc,stroke:#333
    style F fill:#cfc,stroke:#333
    style G fill:#cfc,stroke:#333
    style H fill:#cfc,stroke:#333
    style I fill:#cfc,stroke:#333
    style J fill:#cfc,stroke:#333
    style K fill:#cfc,stroke:#333
    style L fill:#cfc,stroke:#333

◆ UX1 Chassis Wire Connection

◆ UX2 Chassis Wire Connection
Left Side

PowerGround Inas Over 50mm Gap Communication Line Main Power Terminal Block Ground Cable

Right Side

Main Power Terminal Block Ground Cable Power/Ground lines Over 50mm Gap Communication line

Front Side 1

Main Power Terminal Block Ground Cable Power/Ground Line Over 30mm Gas Communication Line

Front Side 2

Main Power Terminal Block Ground Cable Power/Ground lines Over 50mm Gap Communication Inc

Main PCB ConnectionMain Power Conne

Main Power Terminal Block Insulation sleeves attachments Ground Cable Ground Cable Fix firmly not to be displaced

ODU-ODU Communication line ODU-IDU Communication line

◆ UX3 Chassis Wire Connection

Main PCB ConnectionMain Power Connec

Location of setting dip switch

SW01B SW02B 7 - Segment SW02V (Auto Addressing)

DIP switch setting

■ Checking according to dip switch setting

1. You can check the setting values of the Master outdoor unit from the 7 segment LED.

The dip switch setting should be changed when the power is OFF.

1. It checks whether the input is properly performed without the bad contact of the dip switch or not

■ Checking the setting of the Master unit

The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This number represents the setting condition. (For example, represents R410A 30HP)

Master model code → Slave1 model code → Slave2 model code → total capacity → 2 → 25 → 153

1\~255 : Master model code 1\~255 : Slave 1 model code 1\~255 : Slave 2 model code 1\~255 : Slave 3 model code

} Refer to table code

6\~80HP : HP number(sum of master capacity and slave capacity)

No display : cooling only 2 : heat pump

25 : normal

153 : Model Type(ARUNxxxN3)

Example) 30Hp, R410A

16 → 15 → 30 → 2 → 25 → 153

CAUTION

Product may not properly operate if the relevant DIP switch is not properly setup.

Model Code

Model Code	Unit (HP)	Unit	Ref.
11	6	Master & Slave	R410A
12	8
13	10
14	12
15	14
16	16
17	18
18	20

■ Setting the DIP switch

- Heat pump

- If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button.

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Function

Heating capacity up

●

IDU Fan RPM Control

●

Auto charging

●

●

●

×

×

Refrigerant Checking Function

●

●

●

×

●

Integrated test operation function (Cooling)

●

●

×

●

×

Integrated test operation function (Heating)

●

●

×

●

●

Inverter backup

●

Unit backup

●

Non-operation indoor unit EEV adjustment

×

×

●

×

×

Indoor unit target subcooling/overheating adjustment

×

×

×

●

×

Operation indoor unit EEV adjustment

×

●

●

×

×

Dry contact

●

●

×

Snow removal fuction

●

×

Forced defrost

×

●

Snow removal+Forced defrost

●

●

Forced overall defrost

●

●

Static pressure mode

×

×

×

●

×

Nigh low noise operation (Cooling only)

●

× ●

Night low noise operation (Cooling/Heating)

●

● ●

Pump down

●

×

Pump out

●

●

Forced oil return operation

×

×

●

×

Vacuum mode

●

× ×

●

Only overall defrost

●

Selector Fan/ All OFF

×

×

●

●

×

ODU Address setting

●

× ×

ODU setting

Master unit

×

×

×

Slave 1 unit

●

×

●

Slave 2 unit

×

●

●

Slave 3 unit

●

●

●

CAUTION

1. 'X' mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.
2. If the applicable dip switch is not set properly, the product may not work properly.
3. When executing the test operation, check the operating condition of the indoor unit and only execute the operation when all indoor units are stopped.
4. Auto test operation function does not work for the product where only one indoor unit is connected for use.
5. Cooling Only model is not working on functions of Heat Pump model.

- Cooling only

- If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button.

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Index 1 2 3 4 5 6 7 8 9 10

11

12

13

14

Function

Auto charging

●

●

●

×

×

Refrigerant Checking Function

●

●

●

×

●

Integrated test operation function (Cooling)

●

●

×

●

×

Inverter backup

●

Unit backup

●

Indoor unit target subcooling/overheating adjustment

×

×

×

●

×

Dry contact

●

●

×

Snow removal fuction

●

×

Static pressure mode

×

×

×

●

×

Nigh low noise operation (Cooling only)

●

×

Pump down

●

Forced oil return operation

×

×

●

×

Vacuum mode

●

×

×

ODU setting

Master unit

×

×

×

Slave 1 unit

●

×

●

Slave 2 unit

×

●

●

Slave 3 unit

●

●

●

CAUTION

1. 'X' mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.
2. If the applicable dip switch is not set properly, the product may not work properly.
3. When executing the test operation, check the operating condition of the indoor unit and only execute the operation when all indoor units are stopped.
4. Auto test operation function does not work for the product where only one indoor unit is connected for use.
5. Cooling Only model is not working on functions of Heat Pump model.

Automatic Addressing

• The address of indoor units would be set by auto addressing

1) Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units)

2) Press RED button of the outdoor units for 5 seconds. (H/P : SW0B, C/O : SW02V)

3) A "88" is indicated on 7-segment LED of the outdoor unit PCB.

4) For completing addressing, 2\~7 minutes are required depending on numbers of connected indoor units

5) Numbers of connected indoor units whose addressing is completed are indicated for 30 seconds on 7-segment LED of the outdoor unit PCB

6) After completing addressing, address of each indoor unit is indicated on the wired remote control display window. (CH01, CH02, CH03, ....., CH06 : Indicated as numbers of connected indoor units)

SW01B SW02B 7 - Segment SW02V (Auto Addressing)

CAUTION

• In replacement of the indoor unit PCB, always perform Auto addressing setting again (At that time, please check about using Independent power module to any indoor unit.)
• If power supply is not applied to the indoor unit, operation error occur.
• Auto addressing is only possible on the master Unit.
• Auto addressing has to be performed after 3 minutes to improve communication.

◆ The Procedure of Automatic Addressing

graph TD
    A["Power On"] --> B["Waiting 3 minutes"]
    B --> C["Press RED Button for 5 sec. (H/P : SW0B, C/O : SW02V)"]
    C --> D["7-segment LED = 88"]
    D --> E["Don't press RED Button (H/P : SW0B, C/O : SW02V)"]
    E --> F["Waiting about 2~7 minutes"]
    F --> G{7-segment LED = 88}
    G -->|YES| H["OK"]
    G -->|NO Check the connections| I["of transmission line"]
    I --> J["Auto addressing setting end\nNumbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting"]
    J --> K["Press RED Button for 5 sec. (H/P : SW0B, C/O : SW02V)"]
    K --> L["Auto addressing start"]
    L --> D
    G --> M["Indoor address number is displayed on wired remote control or indoor unit display window. It is not an error message, will disappeared when on/off button is pressed on remote control ex) Display of 01, 02, ..., 15 means connection of 15 indoor units and auto addressing is completed normally."]

Group Number setting

Group Number setting for Indoor Units

① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.
② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor Unti with care for their polarity( A → A, B → B )
③ Turn the whole system on.
④ Set the group and Indoor Unit number with a wired remote control.
⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.

Outdoor Units

[Heat Pump] [Cooling Only]

SODU B SODU A IDU B IDU A INT B INT A B(D) A(C) B A SODU IDU INTERNET DRY1 DRY2 GND 12V B A B A B A B(D) A(C) BA

Example) Group number setting

1 F

Group Indoor unit

1^st number indicate the group number

2^nd number point out indoor unit number

Group recognizing the simple central controller

No.0 group (00~0F)

No.1 group (10~1F)

No.2 group (20~2F)

No.3 group (30~3F)

No.4 group (40~4F)

No.5 group (50~5F)

No.6 group (60~6F)

No.7 group (70~7F)

No.8 group (80~8F)

No.9 group (90~9F)

No. A group (A0~AF)

No. B group (B0~BF)

No. C group (C0~CF)

No. D group (D0~DF)

No. E group (E0~EF)

No. F group (F0~FF)

Cool and Heater Selector Installation and Connection

• Connect wires as below figure at the hole of backside of Outdoor Unit Dry Contact.
• Insert the wire in the connection hole pushing the "Push" button.
• Setting Main PCB Dip SW of Master Outdoor Unit.

GND shows field wiring connected wiring Push Button - Insert wire method - Push arrow direction. Insert wire to connector.

*Communication line length can be maximum 300m, use communication line as thick as 1.25mm2.

Without Cool/Heat Selector Installation and Connection

In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor Cool/Heat Selector in field.

Connect signal terminal block as below figure and description.

- How to set mode without Cool/Heat Selector

• Cooling Mode Setting
① → GND Connection
② → Off (Open)

• Heating Mode Setting ① → GND Connection
② → GND Connection

• Fan/ All OFF Mode Setting
① → Off (Open)
② → GND Connection

Test Run

Checks Before Test Run

1	Check to see whether there is any refrigerant leakage, and slack of power or transmission cable.
2	Confirm that 500 V megger shows 2 MΩ or more between power supply terminal block and ground.Do not operate in the case of 2 MΩ or less.NOTE: Never carry out megaohm check over terminal control board. Otherwise the control board would be broken.Immediately after mounting the unit or after leaving it turned off for an extended length of time,the resistance of the insulation between the power supply terminal board and the ground may decrease to approx. 2 MΩ as a result of refrigerant accumulating in the internal compressor.If the insulation resistance is less than 2 MΩ, turning on the main power supply and energizing the crankcase heater for more than 6 hours will cause the refrigerant to evaporate, increasing the insulation resistance.
3	Check if high/low pressure common pipe, liquid pipe and gas pipe valves are fully opened.NOTE: Be sure to tighten caps.
4	Check if there are any problems in automatic addressing or not:Check and confirm that there are no error messages in the display of indoor units or remote controls and LED in outdoor units.

Functions of each Test run steps

(Use above LG MV 6.1 version if you want to issue integrated test run report)

Step 0. Verify the command signals

Select function to be executed during the test run

Step 1. Examine Sensor

Examine the normal operations of the sensors attached to the outdoor/indoor units

Step 2. Refrigerant Automatic Recharge

If additional bottling of the refrigerant is needed, operate to perform this automatically.

Step 3. Automatic Refrigerant Decisions

Inspect if the bottled refrigerant in the system has adequate quantity.

Step 4. Integrated Test Run

Process to verify the normal operations of the parts attached to the system, and verify normal operation of the system.

Step 5. Real-time sensor checking

Check the sensors while operating in real-time.

* Gas pipes and Liquid pipes connections inspection

: Inspect whether the gas pipes and Liquid pipes are connected to each other.

CAUTION

when cutting main power of the Multi V

• Always apply main power of the outdoor unit during use of product (cooling season/heating season).
• Always apply power 6 hours in advance to heat the crank case heater where performing test run after installation of product. It may result in burning out of the compressor if not preheating the crank case with the electrical heater for more than 6 hours.(In case of the outdoor temperature below 10^ )

How to Cope with Test Run Abnormality

The phenomena from main component failure

Component	Phenomenon	Cause	Check method and Trouble shooting
Compressor	Not operating	Motor insulation broken	Check resistance between terminals and chassis
		Strainer clogged	Change strainer
		Oil leakage	Check oil amount after opening oil port
	Stop during running	Motor insulation failure	Check resistance between terminals and chassis
	Abnormal noise during running	R-S-T misconnection	Check compressor R-S-T connection
Outdoor fan	High pressure error at cooling	Motor failure, bad ventilation around outdoor heat exchanger	Check the outdoor fan operation after being turned the outdoor units off for some time. Remove obstacles around the outdoor units
Outdoor EEV	Heating failure, frequent defrosting	Bad connector contact	Check connector
	No operating sound at applying power	Coil failure	Check resistance between terminals
	Heating failure, frozen outdoor heat exchanger part	EEV clogged	Service necessary
	Low pressure error or discharge temperature error	EEV clogged	Service necessary

When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trouble shooting guide is in the service manual

Sensor Checking Function

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. 3 indoor temperature sensors, 9 outdoor temperature sensor ^Note 1 , 2 outdoor pressure sensors.

graph TD
    A["Start"] --> B{3 minutes past after power reset}
    B -->|NO| C["DIP switch set"]
    B -->|YES| D["Setting 1 Setting 2 Setting 3 Setting 4"]
    C --> E["Note 3)"]
    D --> E
    E --> F{Press black button for 2 seconds}
    F -->|NO| G{Sensor Normal}
    F -->|YES| H["Display Error"]
    G --> I{Press black button for 5 seconds}
    I --> J["Setting 1 Setting 2 Setting 3 Setting 4"]
    J --> K["508 Refrigerant Auto Recharge"]
    J --> L["608 Refrigerant Auto decide"]
    J --> M["708 E: Cooling F: Heating"]
    K --> N["Start Inspection of each Function"]
    L --> N
    M --> N
    N --> O["End"]
    O --> P["All DIP switches OFF and press black button for 2 seconds"]
    P --> Q["Data Reset and Wait"]

Note 1. Outdoor temperature number is different according to each chassis.

	UX1 UX2(1 Comp) UX2 UX3 (2 Comp) UX3
Cooling Only 6	6	7	7	8
Heat Pump - 7 8	8 9

Note 2. Please check the sensor that is found abnormal.
Note 3. Each step is displayed on the Main PCB LED.
Note 4. Please refer to the sensor error descriptions on the next page.

WARNING

1. Please confirm if auto addressing function was executed. (Check the number of installed indoor units)
2. Error may occur when the sensor is normal according to the installed location and the temperature conditions. When error occurs, please check each sensor and decide faultiness.

Sensor Check Error Code Display

In case error occurs during sensor checking process, error display is as shown below. Following contents are displayed one after the other on the main PCB of master outdoor unit.

graph TD
    A["Indoor sensor error : 319"] --> B["Outdoor sensor error : 309"]
    B --> C["Displaying error content"]
    note["* 5 number of errors is displayed continuously and repeatedly."]

Displaying error content

■ Indoor unit error display

1.1st and 2nd number represents indoor unit number.
2. Last number represents sensor.

1: Pipe inlet temperature sensor
2: Pipe outlet temperature sensor
3: Air temperature sensor

■ Displaying outdoor unit error

1.1st and 2nd number represents error content(code).
2. Last number represents outdoor unit number.

1:Master
2: Slave 1
3: Slave 2
4: Slave 3

* Indoor unit number follows auto addressing number. (To check the LGMV Data)

Table 1. ODU Sensor Error Code

No.	Sensor type
1	Outdoor Air Temperature
2	Heat Exchanger Temperature
5	Liquid Pipe Temperature
6	SC pipe out
7	Suction Temperature
8	Inverter Comp. Discharge Temperature
9	Constant Comp.1 Discharge Temperature
10	Constant Comp.2 Discharge Temperature
11	High Pressure
12	Low Pressure
14	IPM temperature

Table 2. IDU Sensor Error Code

No. Classification

1 Pipe In Temperature

2 Pipe Out Temperature

3 Indoor Air Temperature

ex) Indoor unit No. 2 Pipe inlet temperature sensor error

ex) Outdoor Master Unit Liquid pipe temperature sensor error

ex) IDU No.2 Pipe inlet temperature sensor error and Master ODU suction temperature sensor, Slave 3 high pressure sensor error

graph LR
    A["319"] --> B["21"]
    C["309"] --> D["71"]
    E["309"] --> F["111"]
    B --> G[" "]
    D --> H[" "]
    F --> I[" "]
    G --> J[" "]
    H --> K[" "]
    I --> L["...."]

Caution

1. Up to 5 number of errors is displayed continuously and repeatedly. In case 5 error occurs, again perform sensor checking after solving errors.
2. IDU in which error occurred operates air circulation mode.

Refrigerant Auto Charging (Setting 1)

This function charges appropriate amount of refrigerant automatically through cycle operation. It can be used when refrigerant amount Isn't certain because of SVC and leakage.

graph TD
    A["Start"] --> B["Wait for 3 min. after power reset"]
    B --> C["Set the Dip S/W.<br>(Refer to DIP S/W setting)"]
    C --> D["Press the black button.<br>(Press until '508' is displayed)"]
    D --> E["Press the black button."]
    E --> F["IDU runs with cooling mode In designated order."]
    F --> G{Is it necessary to charge refrigerant?}
    G -->|No| H["IDU and ODU are turned off when Auto Charging is completed. Close the valve."]
    G -->|Yes| I["Press the black button"]
    I --> J["Refrigerant Auto Charging Process"]
    J --> K["578"]
    J --> L["568"]
    J --> M["528"]
    L --> N["578"]
    L --> O["588"]
    M --> P["518"]
    P --> Q["508"]
    Q --> R["Main PCB SW01V"]
    H --> S["938"]
    H --> T["000"]
    S --> U["Press the black button"]
    T --> V["Press the black button for 2 sec. after turning off all of dip S/W."]
    U --> W["Completed."]
    V --> X["Completed."]

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

Note

1. After installing the refrigerant charging device, 568 as shown in figure, open the valve
2. In case air temperature is out of guaranteed temperature, it may end without performing Auto charging
3. Refrigerant charging Time may change according to the charging amount. (Abt. 1.5min/lb)

Liquid Pipe Gas Pipe manifold Capillary Assembly

Procedure

1. Arrange manifold, capillary assembly, refrigerant vessel and scale
2. Connect manifold to the gas pipe service valve of ODU as shown in the figure.

3. Connect manifold and Capillary tube.
   Use designated capillary assembly only.
   If designated capillary assembly isn't used, the system may get damaged.

4. Connect capillary and refrigerant vessel.

5. Purge hose and manifold.

6. After 568 Is displayed, open the valve and charge the refrigerant

■ Error contents about auto refrigerant charging function

1. 329 Temperature Range Error (In case that IDU or ODU is out of range)
2. Pressure Descent Error (In case the system runs at low pressure limit for over 10 minutes)
3. 349 ing rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using designated Capillary Assembly)
4. 357 bility Error( In case the high/low pressure target doesn't get satisfied for some time after the starting operation)

CAUTION

1. Guaranteed temperature range (Error will occur if temperature is out of range)
   IDU : 20°C(68°F) \~ 32°C(90°F)
   ODU : 0°C(32°F) \~ 43°C (77°F)
2. For refrigerant charging, use designated device only. (Capillary Assem Set)
3. Set the IDU wired remote controller temperature sensing mode as IDU
4. Be careful that IDU should not be thermo off.

Refrigerant Checking Function (Setting 2)

This function judges refrigerant leakage and overcharging

It can be used with refrigerant auto charging function.

graph TD
    A["608 Inspection Start"] --> B["Press black button for 2 seconds"]
    B -->|YES| C{Proper Temperature}
    B -->|NO| D["Display Error"]
    C --> E{Thermo off indoor unit}
    E -->|YES| F["Decide Refrigerant Quantity"]
    E -->|NO| G["Display Error"]
    F --> H{Based on Refrigerant Quantity}
    H --> I["619 Too much Refrigerant"]
    H --> J["629 Not enough Refrigerant"]
    H --> K["639 Cannot tell Quantity"]
    H --> L["649 Refrigerant Quantity Normal"]
    H --> M["659 Gas/Liquid pipe direct connection"]
    I --> N["Indoor Unit OFF"]
    J --> N
    K --> N
    L --> N
    M --> N
    N --> O["End"]
    O --> P["Press black button for 2 seconds"]
    P --> Q["Data Reset and Wait"]
    style A fill:#f9f,stroke:#333
    style Q fill:#ccf,stroke:#333

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

Note

1. In case air temperature is out of guaranteed temperature, refrigerant checking function may end without performing refrigerant checking. Use guaranteed temperature range only.
2. During the process of judging refrigerant amount, if the cycle isn't stable, refrigerant checking function may end without performing refrigerant checking.

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)
   IDU : 20 \~ 35 °C
   ODU : 0 \~ 43 °C

2. Set IDU wired remote controller temperature sensor setting as 'IDU'.

3. Make certain that IDU doesn't run with thermo off mode during operation.

[Error contents about auto refrigerant charging function]

1. Temperature Range Error (In case that IDU or ODU is out of range)
2. 694 em Unstable Error (In case, After 45 min operating the system, it does not be stable)

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant checking and the system will be OFF.
2. Excess of Refrigerant(619)
   After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto Charging Function.
3. Scarcity of Refrigerant(629)
   Charge the refrigerant by using Refrigerant Auto Charging Function.
4. Impossible to Judge(639)
   IF the system is not in order, check the other problem except refrigerant.

Integrated Test Running Function\_Cooling Mode (Setting 3)

This function is checking process for normal operation of parts and system On operating system.

• All processes carry out included refrigerant amount judge logic and check normal condition of parts on cooling mode.
• This function check only normal condition of parts on heating mode.
• Saved data can check using LGMV.

graph TD
    A["Start"] --> B["Press the black button for 2 sec"]
    B --> C{All IDU operation on Cooling mode}
    C --> D{Temp. Condition}
    D -->|Yes| E{Thermo off IDU judge}
    D -->|No| F["Error Display"]
    E --> G{Refrigerant amount judge during all IDU operation data on Test Running(15min)}
    G --> H{1 IDU operation}
    H -->|Note 1| I["1 IDU operation data (10min)"]
    F --> J{609 Error Display}
    J --> K["Press the black button for 2 sec"]
    K --> L["End"]
    L --> M["Press the black button for 2 sec. after turning off all of Dip switch."]
    M --> N["Completed"]
    C --> O["608"]
    C --> P["618"]
    O --> B
    P --> B
    style A fill:#f9f,stroke:#333
    style N fill:#ccf,stroke:#333

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

Note

1. Judge the normal condition refer to report of Test Running.

Integrated Test Running Function\_Heating Mode (Setting 4)

This function is checking process for normal operation of parts and system On operating system.

• All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating mode.
• This function check only normal condition of parts on heating mode.
• Saved data can check using LGMV.

graph TD
    A["Start"] --> B["Press the black button for 2 sec."]
    B --> C{Temp. Condition}
    C -->|Yes| D["Error Display"]
    C -->|No| E["Error Display"]
    D --> F["All IDU operation data(10min)"]
    F --> G["(All-1) IDU operation"]
    G --> H["1 IDU operation"]
    H --> I["Oil return operation"]
    I --> J["System off"]
    J --> K["End"]
    K --> L["Press the black button for 2 sec. after turning off all of Dip switch."]
    L --> M["Completed"]

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

Note

1. Judge the normal condition refer to report of Test Running.

CAUTION

1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)

IDU : 20 \~ 35 °C

ODU : 0 \~ 43 °C

1. Set IDU wired remote controller temperature sensor setting as 'IDU'.

2. Make certain that IDU doesn't run with thermo off mode during operation.

[Error contents about auto refrigerant charging function]

1. Temperature Range Error (In case that IDU or ODU is out of range)

2. System Unstable Error (In case, After 45 min operating the system, it does not be stable)

How to Cope with Result of Refrigerant checking

1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant checking and the system will be OFF.
2. Excess of Refrigerant(619)

After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto Charging Function.

1. Scarcity of Refrigerant(629)

Charge the refrigerant by using Refrigerant Auto Charging Function.

1. Impossible to Judge(639)

IF the system is not in order, check the other problem except refrigerant.

Night Low Noise Function

In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load.

Max. RPM setting method

graph TD
    A["Set the DIP S/W"] --> B["Reset the power"]
    B --> C["Setting the Fan Max. RPM"]
    C --> D["Setting Complete"]

Example of Max. RPM Setting

Setting Method for Fan Max. RPM

Step Black	Button Red Button
1 1 time 1	time
2 2 time 1	time
3 3 time 1	time
4 4 time 1	time
5 5 time 1	time
6 6 time 1	time
7 7 time 1	time
8 8 time 1	time
9 9 time 1	time

RPM / Time Settings

		Capacity			Judgment Time(Hr)	Operation Time(Hr)
Heat Pump		16kW	23~35kW	41~58kW
Cooling Only		16~23kW	29~41kW	46~58kW
Step		Fan Maximum RPM
1	1	730	790	900	8	9
2					6.5 10.5
3					5	12
4	2	620	680 800		8	9
5					6.5 10.5
6					5	12
7	3	510 620	780		8	9
8					6.5 10.5
9					5	12

Noise

	Capacity
Heat Pump	16kW	23~35kW	41~58kW
Cooling Only	16~23kW	29~41kW	46~58kW
Step	Noise(dB)
Standard	56 58 62
1	53 55 59
2	50 52 56
3	47 49 53

DIP Switch Settings

[Heater Pump] [Cooling only]

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

CAUTION

1. Request installer to set the function during installation.
2. In case the function is not used, set the dip S/W OFF and reset the power.
3. If ODU RPM changes, cooling capacity may go down.

Vacuum Mode

This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.

graph TD
    A["Vacuum mode setting method Vacuum mode cancellation"] --> B["ODU power reset"]
    B --> C["Set the DIP S/W ON"]
    C --> D["Press the black button Main PCB (5 sec.)"]
    D --> E["Vacuum mode setting ODU V/V OPEN\nMain EEV, SC EEV OPEN\nIDU EEV OPEN"]
    F["Set the DIP S/W OFF"] --> G["Power reset"]
    G --> H["Vacuum mode cancellation"]

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7

ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset Main PCB before starting this function

CAUTION

ODU operation stops during vacuum mode. Compressor can't operate.

Static pressure compensation mode

This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan

discharge of ODU.

■ Static pressure compensation dip S/W setting method

High static pressure mode : Set DIP S/W

graph TD
    A["Static pressure compensation mode setting method"] --> B["Set the DIP S/W ON"]
    B --> C["Power Reset"]
    C --> D["Static pressure compensation mode is set"]

    E["Static pressure compensation mode cancellation method"] --> F["DIP switch OFF"]
    F --> G["Power Reset"]
    G --> H["Static pressure compensation mode is cancelled"]

DIP Switch Settings

ON 1 2 3 4 5 6 7 1 2 3 4 5 6 7 ON 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Warning : Please reset SVC (Heat Pump)/ Main PCB (Cooling only) before starting this function

Self-Diagnosis Function

Error Indicator

• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display

1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.

Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2

011 → 051 : No.105 error of master unit

* Refer to the DX-Venitilation manual for DX-Venitilation error code

Display Title				Cause of Error
Indoor unit related error	0	1	-	Air temperature sensor of indoor unit	Air temperature sensor of indoor unit is open or short
	0 2	-		Inlet pipe temperature sensor of indoor unit	Inlet pipe temperature sensor of indoor unit is open or short
	0 3	-		Communication error : wired remote controller indoor unit	Failing to receive wired remote controller signal in indoor unit PCB
	0 4	-	Drain pump	Malfunction of drain pump
	0 5	-		Communication error : outdoor unit indoor unit	Failing to receive outdoor unit signal in indoor unit PCB
	0 6	-		Outlet pipe temperature sensor of indoor unit	Outlet pipe temperature sensor of indoor unit is open or short
	0 9	-	Indoor EEPROM Error		In case when the serial number marked on EEPROM of Indoor unit is 0 or FFFFFFF
	1 0	-	Poor fan motor operation		Disconnecting the fan motor connector/Failure of indoor fan motor lock
	1	7	-	Inlet Air temperature sensor of FAU	Air temperature sensor of indoor unit is open or short
Outdoor unit related error	2	1	1	Master Outdoor Unit Inverter Compressor IPM Fault	Master Outdoor Unit Inverter Compressor Drive IPM Fault
			2	Slave1 Outdoor Unit Inverter Compressor IPM Fault	Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault
			3	Slave2 Outdoor Unit Inverter Compressor IPM Fault	Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault
			4	Slave3 Outdoor Unit Inverter Compressor IPM Fault	Slave3 Outdoor Unit Inverter Compressor Drive IPM Fault
	2	2	1	Inverter Board Input Over Current(RMS) of Master Outdoor Unit	Master Outdoor Unit Inverter Board Input Current excess (RMS)
			2	Inverter Board Input Over Current(RMS) of Slave1 Outdoor Unit	Slave1 Outdoor Unit Inverter Board Input Current excess (RMS)
			3	Inverter Board Input Over Current(RMS) of Slave2 Outdoor Unit	Slave2 Outdoor Unit Inverter Board Input Current excess (RMS)
			4	Inverter Board Input Over Current(RMS) of Slave3 Outdoor Unit	Slave3 Outdoor Unit Inverter Board Input Current excess (RMS)
	Display			Title	Cause of Error
Outdoor unit related error	2	3	1	Master Outdoor Unit Inverter Compressor DC link Low Voltage	DC charging is not performed at Master Outdoor Unit after starting relay turn on.
			2	Slave1 Outdoor Unit Inverter Compressor DC link Low Voltage	DC charging is not performed at Slave1 Outdoor Unit after starting relay turn on.
			3	Slave2 Outdoor Unit Inverter Compressor DC link Low Voltage	DC charging is not performed at Slave2 Outdoor Unit after starting relay turn on.
			4	Slave3 Outdoor Unit Inverter Compressor DC link Low Voltage	DC charging is not performed at Slave3 Outdoor Unit after starting relay turn on.
	2	4	1	Master Outdoor Unit High Pressure Switch	System is turned off by Master Outdoor Unit high pressure switch.
			2	Slave1 Outdoor Unit High Pressure Switch	System is turned off by slave1 Outdoor Unit high pressure switch.
			3	Slave2 Outdoor Unit High Pressure Switch	System is turned off by slave2 Outdoor Unit high pressure switch.
			4	Slave3 Outdoor Unit High Pressure Switch	System is turned off by slave3 Outdoor Unit high pressure switch.
	2	5	1	Master Outdoor Unit Input Voltage High/ Low Voltage	Master Outdoor Unit input voltage is over 487V or below 270V
			2	Slave1 Outdoor Unit Input Voltage High/ Low Voltage	Slave1 Outdoor Unit input voltage is over 487V or below 270V
			3	Slave2 Outdoor Unit Input Voltage High/ Low Voltage	Slave2 Outdoor Unit input voltage is over 487V or below 270V
			4	Slave3 Outdoor Unit Input Voltage High/ Low Voltage	Slave3 Outdoor Unit input voltage is over 487V or below 270V
	2	6	1	Master Outdoor Unit Inverter Compressor Start Failure	The First Start Failure by Master Outdoor Unit Inverter Compressor Abnormality
			2	Slave1 Outdoor Unit Inverter Compressor Start Failure	The First Start Failure by Slave1 Outdoor Unit Inverter Compressor Abnormality
			3	Slave2 Outdoor Unit Inverter Compressor Start Failure	The First Start Failure by Slave2 Outdoor Unit Inverter Compressor Abnormality
			4	Slave3 Outdoor Unit Inverter Compressor Start Failure	The First Start Failure by Slave3 Outdoor Unit Inverter Compressor Abnormality
	2	8	1	Master Outdoor Unit Inverter DC link High Voltage	System is turned off by Master Outdoor Unit DC Voltage Over Charging
			2	Slave1 Outdoor Unit Inverter DC link High Voltage	System is turned off by Slave1 Outdoor Unit DC Voltage Over Charging
			3	Slave2 Outdoor Unit Inverter DC link High Voltage	System is turned off by Slave2 Outdoor Unit DC Voltage Over Charging
			4	Slave3 Outdoor Unit Inverter DC link High Voltage	System is turned off by Slave3 Outdoor Unit DC Voltage Over Charging
	2	9	1	Master Outdoor Unit Inverter Compressor Over Current	Master Outdoor Unit Inverter Compressor Fault OR Drive Fault
			2	Slave1 Outdoor Unit Inverter Compressor Over Current	Slave1 Outdoor Unit Inverter Compressor Fault OR Drive Fault
			3	Slave2 Outdoor Unit Inverter Compressor Over Current	Slave2 Outdoor Unit Inverter Compressor Fault OR Drive Fault
			4	Slave3 Outdoor Unit Inverter Compressor Over Current	Slave3 Outdoor Unit Inverter Compressor Fault OR Drive Fault
Outdoor unit related error	3	0	1	Master Outdoor Unit Constant Speed Compressor2 High Discharge Temperature	System is turned off by Master Outdoor Uunit Constant Speed Compressor2 High Discharge Temperature
			2	Slave1 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature	System is turned off by Slave1 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature
			3	Slave2 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature	System is turned off by Slave2 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature
			4	Slave3 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature	System is turned off by Slave3 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature
	3	2	1	Master Outdoor Unit Inverter Compressor High Discharge Temperature	System is turned off by Master Outdoor Unit Inverter Compressor High Discharge Temperature
			2	Slave1 Outdoor Unit Inverter Compressor High Discharge Temperature	System is turned off by Slave1 Outdoor Unit Inverter Compressor High Discharge Temperature
			3	Slave2 Outdoor Unit Inverter Compressor Discharge High Temperature	System is turned off by Slave2 Outdoor Unit Inverter Compressor High Discharge Temperature
			4	Slave3 Outdoor Unit Inverter Compressor High Discharge Temperature	System is turned off by Slave3 Outdoor Unit Inverter Compressor High Discharge Temperature
	3	3	1	Master Outdoor Unit Constant Speed Compressor1 High Discharge Temperature	System is turned off by Master Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
			2	Slave1 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature	System is turned off by Slave1 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
			3	Slave2 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature	System is turned off by Slave2 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
			4	Slave3 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature	System is turned off by Slave3 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
	3	4	1	High Pressure of Master Outdoor Unit	System is turned off by excessive increase of high pressure of Master Outdoor Unit
			2	High Pressure of Slave1 Outdoor Unit	System is turned off by excessive increase of high pressure of Slave1 Outdoor Unit
			3	High Pressure of Slave2 Outdoor Unit	System is turned off by excessive increase of high pressure of Slave2 Outdoor Unit
			4	High Pressure of Slave3 Outdoor Unit	System is turned off by excessive increase of high pressure of Slave3 Outdoor Unit
	3	5	1	Low Pressure of Master Outdoor Unit	System is turned off by excessive decrease of low pressure of Master Outdoor Unit
			2	Low Pressure of Slave1 Outdoor Unit	System is turned off by excessive decrease of low pressure of Slave1 Outdoor Unit
			3	Low Pressure of Slave2 Outdoor Unit	System is turned off by excessive decrease of low pressure of Slave2 Outdoor Unit
			4	Low Pressure of Slave3 Outdoor Unit	System is turned off by excessive decrease of low pressure of Slave3 Outdoor Unit
	3	6	1	Master Outdoor Unit Low Condensing Ratio Limited	Master Outdoor Unit stayed under low condensing limit for 3 minutes
			2	Slave1 Outdoor Unit Low Condensing Ratio Limited	Slave1 Outdoor Unit stayed under low condensing limit for 3 minutes
			3	Slave2 Outdoor Unit Low Condensing Ratio Limited	Slave2 Outdoor Unit stayed under low condensing limit for 3 minutes
			4	Slave3 Outdoor Unit Low Condensing Ratio Limited	Slave3 Outdoor Unit stayed under low condensing limit for 3 minutes
Outdoor unit related error	4	0	1	Master Outdoor Unit Inverter Compressor CT Sensor Fault	Master Outdoor Unit Inverter Compressor CT Sensor open or short
			2	Slave1 Outdoor Unit Inverter Compressor CT Sensor Fault	Slave1 Outdoor Unit Inverter Compressor CT Sensor open or short
			3	Slave2 Outdoor Unit Inverter Compressor CT Sensor Fault	Slave2 Outdoor Unit Inverter Compressor CT Sensor open or short
			4	Slave3 Outdoor Unit Inverter Compressor CT Sensor Fault	Slave3 Outdoor Unit Inverter Compressor CT Sensor open or short
	4	1	1	Master Outdoor Unit Inverter Compressor Discharge Temperature Sensor Fault	Master Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
			2	Slave1 Outdoor Unit Inverter Compressor Discharge Temperature Sensor Fault	Slave1 Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
			3	Slave2 Outdoor Unit Inverter Compressor Discharge Temperature Sensor Fault	Slave2 Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
			4	Slave3 Outdoor Unit Inverter Compressor Discharge Temperature Sensor Fault	Slave3 Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
	4	2	1	Master Outdoor Unit Low Pressure Sensor Fault	Master Outdoor Unit Low Pressure Sensor open or short
			2	Slave1 Outdoor Unit Low Pressure Sensor Fault	Slave1 Outdoor Unit Low Pressure Sensor open or short
			3	Slave2 Outdoor Unit Low Pressure Sensor Fault	Slave2 Outdoor Unit Low Pressure Sensor open or short
			4	Slave3 Outdoor Unit Low Pressure Sensor Fault	Slave3 Outdoor Unit Low Pressure Sensor open or short
	4	3	1	Master Outdoor Unit High Pressure Sensor Fault	Master Outdoor Unit High Pressure Sensor open or short
			2	Slave1 Outdoor Unit High Pressure Sensor Fault	Slave1 Outdoor Unit High Pressure Sensor open or short
			3	Slave2 Outdoor Unit High Pressure Sensor Fault	Slave2 Outdoor Unit High Pressure Sensor open or short
			4	Slave3 Outdoor Unit High Pressure Sensor Fault	Slave3 Outdoor Unit High Pressure Sensor open or short
	4	4	1	Master Outdoor Unit Air Temperature Sensor Fault	Master Outdoor Unit Air Temperature Sensor open or short
			2	Slave1 Outdoor Unit Air Temperature Sensor Fault	Slave1 Outdoor Unit Air Temperature Sensor open or short
			3	Slave2 Outdoor Unit Air Temperature Sensor Fault	Slave2 Outdoor Unit Air Temperature Sensor open or short
			4	Slave3 Outdoor Unit Air Temperature Sensor Fault	Slave3 Outdoor Unit Air Temperature Sensor open or short
Outdoor unit related error	4	5	1	Master Outdoor Unit Heat Exchanger Temperature Sensor (Front side) Fault	Master Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or short
			2	Slave1 Outdoor Unit Heat Exchanger Temperature Sensor (Front side) Fault	Slave1 Outdoor Unit Heat Exchanger Temperature Sensor (Front side) open or short
			3	Slave2 Outdoor Unit Heat Exchanger Temperature Sensor (Front side) Fault	Slave2 Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or short
			4	Slave3 Outdoor Unit Heat Exchanger Temperature Sensor (Front side) Fault	Slave3 Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or short
	4	6	1	Master Outdoor Unit Suction Temperature Sensor Fault	Master Outdoor Unit Suction Temperature Sensor open or short
			2	Slave1 Outdoor Unit Suction Temperature Sensor Fault	Slave1 Outdoor Unit Suction Temperature Sensor open or short
			3	Slave2 Outdoor Unit Suction Temperature Sensor Fault	Slave2 Outdoor Unit Suction Temperature Sensor open or short
			4	Slave3 Outdoor Unit Suction Temperature Sensor Fault	Slave3 Outdoor Unit Suction Temperature Sensor open or short
	4	7	1	Master Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor Fault	Master Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor open or short
			2	Slave1 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor Fault	Slave1 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor open or short
			3	Slave2 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor Fault	Slave2 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor open or short
			4	Slave3 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor Fault	Slave3 Outdoor Unit Constant Speed Compressor1 Discharge Temperature Sensor open or short
	4	8	1	Master Outdoor Unit Constant Speed Compressor2 Discharge Temperature Sensor Fault	Master Outdoor Unit Constant Speed Compressor 2 Discharge Temperature Sensor open or short
			2	Slave1 Outdoor Unit Constant Speed Compressor2 Discharge Temperature Sensor Fault	Slave1 Outdoor Unit Constant Speed Compressor 2 Discharge Temperature Sensor open or short
			3	Slave2 Outdoor Unit Constant Speed Compressor2 Discharge Temperature Sensor Fault	Slave2 Outdoor Unit Constant Speed Compressor 2 Discharge Temperature Sensor open or short
			4	Slave3 Outdoor Unit Constant Speed Compressor2 Discharge Temperature Sensor Fault	Slave3 Outdoor Unit Constant Speed Compressor 2 Discharge Temperature Sensor open or short

	Display	Title	Cause of Error
Outdoor unit related error
	49	1 Master Outdoor Unit Faulty IPM Temperature Sensor	Master Outdoor Unit IPM Temperature Sensor short/open
		2 Slave1 Outdoor Unit Faulty IPM Temperature Sensor	Slave1 Outdoor Unit IPM Temperature Sensor short/open
		3 Slave2 Outdoor Unit Faulty IPM Temperature Sensor	Slave2 Outdoor Unit IPM Temperature Sensor short/open
		4 Slave3 Outdoor Unit Faulty IPM Temperature Sensor	Slave3 Outdoor Unit IPM Temperature Sensor short/open
		50	Omitting connection of R, S, T power of Master Outdoor Unit
		1 Omitting connection of R, S, T power of Master Outdoor Unit	Omitting connection of Master outdoor unit
		2 Omitting connection of R, S, T power of Master Outdoor Unit	Omitting connection of Slave1 Outdoor Unit
		3 Omitting connection of R, S, T power of Master Outdoor Unit	Omitting connection of Slave2 Outdoor Unit
		4 Omitting connection of R, S, T power of Master Outdoor Unit	Omitting connection of Slave3 Outdoor Unit
		51	Excessive capacity of indoor units
		1 Transmission error : inverter PCB → Main PCB	Excessive connection of indoor units compared to capacity of Outdoor Unit
		2 Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Master Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Slave1 Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Slave2 Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Slave3 Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Slave1 Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Failing to receive inverter signal at main PCB of Outdoor Unit.
		Transmission error : inverter PCB → Main PCB	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		Transmission error : inverter PCB → Main PCB	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
	57	1 Master Outdoor Unit Communication Error with Inverter Controller	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		2 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		3 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, A power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R. S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Units
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connection of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T Power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
		4 Reverse connection of R, S, T power of Master Outdoor Unit	Reverse Connection or omitting connections of R, S, T power of Master Outdoor Unit
	59	1 Error of series installation	In the case of installing smaller outdoor unit as master unit

	Display			Title	Cause of Error
Outdoor unit related error	6	0	1	Inverter PCB EEPROM Error of Master Outdoor Unit	Access Error of Inverter PCB of Master Outdoor Unit
			2	Inverter PCB EEPROM Error of Slave1 Unit	Access Error of Inverter PCB of Slave1 Outdoor Unit
			3	Inverter PCB EEPROM Error of Slave2 Unit	Access Error of Inverter PCB of Slave2 Outdoor Unit
			4	Inverter PCB EEPROM Error of Slave3 Unit	Access Error of Inverter PCB of Slave3 Outdoor Unit
	6	7	1	Master Outdoor Unit Fan Lock	Restriction of Master Outdoor Unit
			2	Slave1 Outdoor Unit Fan Lock	Restriction of Slave1 Outdoor Unit
			3	Slave2 Outdoor Unit Fan Lock	Restriction of Slave2 Outdoor Unit
			4	Slave3 Outdoor Unit Fan Lock	Restriction of Slave3 Outdoor Unit
	6	9	1	Constant1 CT Sensor Error of Master Outdoor Unit	Constant1 CT Sensor open or short of Master Outdoor Unit
			2	Constant1 CT Sensor Error of Slave1 Outdoor Unit	Constant1 CT Sensor open or short of Slave1 Outdoor Unit
			3	Constant1 CT Sensor Error of Slave2 Outdoor Unit	Constant1 CT Sensor open or short of Slave2 Outdoor Unit
			4	Constant1 CT Sensor Error of Slave3 Outdoor Unit	Constant1 CT Sensor open or short of Slave3 Outdoor Unit
	7	0	1	Constant2 CT Sensor Error of Master Outdoor Unit	Constant2 CT Sensor open or short of Master Outdoor Unit
			2	Constant2 CT Sensor Error of Slave1 Outdoor Unit	Constant2 CT Sensor open or short of Slave1 Outdoor Unit
			3	Constant2 CT Sensor Error of Slave2 Outdoor Unit	Constant2 CT Sensor open or short of Slave2 Outdoor Unit
			4	Constant2 CT Sensor Error of Slave3 Outdoor Unit	Constant2 CT Sensor open or short of Slave3 Outdoor Unit
	7	3	1	Instant Over Current(Peak) of Master Outdoor Unit PFC	Instant Over Current(Peak) of Master Outdoor Unit PFC
			2	Instant Over Current(Peak) of Slave1 Outdoor Unit PFC	Instant Over Current(Peak) of Slave1 Outdoor Unit PFC
			3	Instant Over Current(Peak) of Slave2 Outdoor Unit PFC	Instant Over Current(Peak) of Slave2 Outdoor Unit PFC
			4	Instant Over Current(Peak) of Slave3 Outdoor Unit PFC	Instant Over Current(Peak) of Slave3 Outdoor Unit PFC
	7	5	1	Master Outdoor Unit Fan CT Sensor Error	Master Outdoor Unit Fan CT Sensor open or short
			2	Slave1 Outdoor Unit Fan CT Sensor Error	Slave1 Outdoor Unit Fan CT Sensor open or short
			3	Slave2 Outdoor Unit Fan CT Sensor Error	Slave2 Outdoor Unit Fan CT Sensor open or short
			4	Slave3 Outdoor Unit Fan CT Sensor Error	Slave3 Outdoor Unit Fan CT Sensor open or short
Outdoor unit related error	7	6	1	Master Outdoor Unit Fan DC Link High Voltage Error	Master Outdoor Unit Fan DC Link High Voltage Error
			2	Slave1 Outdoor Unit Fan DC Link High Voltage Error	Slave1 Outdoor Unit Fan DC Link High Voltage Error
			3	Slave2 Outdoor Unit Fan DC Link High Voltage Error	Slave2 Outdoor Unit Fan DC Link High Voltage Error
			4	Slave3 Outdoor Unit Fan DC Link High Voltage Error	Slave3 Outdoor Unit Fan DC Link High Voltage Error
	7	7	1	Master Outdoor Unit Fan Over Current Error	Master Outdoor Unit Fan Current is over 5A
			2	Slave1 Outdoor Unit Fan Over Current Error	Slave1 Outdoor Unit Fan is over 5A
			3	Slave2 Outdoor Unit Fan Over Current Error	Slave2 Outdoor Unit Fan is over 5A
			4	Slave3 Outdoor Unit Fan Over Current Error	Slave3 Outdoor Unit Fan is over 5A
	7	9	1	Master Outdoor Unit Fan Start Failure Error	Master Outdoor Unit Fan First Position Sensing Failure
			2	Slave1 Outdoor Unit Fan Start Failure Error	Slave1 Outdoor Unit Fan First Position Sensing Failure
			3	Slave2 Outdoor Unit Fan Start Failure Error	Slave2 Outdoor Unit Fan First Position Sensing Failure
			4	Slave3 Outdoor Unit Fan Start Failure Error	Slave3 Outdoor Unit Fan First Position Sensing Failure
	8	6	1	Master Outdoor Unit Main PCB EEPROM Error	Communication Fail Between Master Outdoor Unit Main MICOM and EEPROM or omitting EEPROM
			2	Slave1 Outdoor Unit Main PCB EEPROM Error	Communication Fail Between Slave1 Outdoor Unit Main MICOM and EEPROM or omitting EEPROM
			3	Slave2 Outdoor Unit Main PCB EEPROM Error	Communication Fail Between Slave2 Outdoor Unit Main MICOM and EEPROM or omitting EEPROM
			4	Slave3 Outdoor Unit Main PCB EEPROM Error	Communication Fail Between Slave3 Outdoor Unit Main MICOM and EEPROM or omitting EEPROM
	8	7	1	Master Outdoor Unit Fan PCB EEPROM Error	Communication Fail Between Master Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM
			2	Slave1 Outdoor Unit Fan PCB EEPROM Error	Communication Fail Between Slave1 Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM
			3	Slave2 Outdoor Unit Fan PCB EEPROM Error	Communication Fail Between Slave2 Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM
			4	Slave3 Outdoor Unit Fan PCB EEPROM Error	Communication Fail Between Slave3 Outdoor Unit Fan MICOM and EEPROM or omitting EEPROM

	Display				Title	Cause of Error
Outdoor unit related error	1	0	4	1	Communication Error Between Master Outdoor Unit and Other Outdoor Unit	Failing to receive Slave Unit signal at main PCB of Master Outdoor Unit
				2	Communication Error Between Slave1 Outdoor Unit and Other Outdoor Unit	Failing to receive master and other Slave Unit signal at main PCB of Slave1 Outdoor Unit
				3	Communication Error Between Slave2 Outdoor Unit and Other Outdoor Unit	Failing to receive master and other Slave Unit signal at main PCB of Slave2 Outdoor Unit
				4	Communication Error Between Slave3 Outdoor Unit and Other Outdoor Unit	Failing to receive master and other Slave Unit signal at main PCB of Slave3 Outdoor Unit
	1	0	5	1	Master Outdoor Unit Fan PCB Communication Error	Failing to receive fan signal at main PCB of master unit.
				2	Slave1 Outdoor Unit Fan PCB Communication Error	Failing to receive fan signal at main PCB of Slave1 unit.
				3	Slave2 Outdoor Unit Fan PCB Communication Error	Failing to receive fan signal at main PCB of Slave2 unit.
				4	Slave3 Outdoor Unit Fan PCB Communication Error	Failing to receive fan signal at main PCB of Slave3 unit.
	1	0	6	1	Master Outdoor Unit FAN IPM Fault Error	Instant Over Current at Master Outdoor Unit Fan IPM
				2	Slave1 Outdoor Unit FAN IPM Fault Error	Instant Over Current at Slave1 Outdoor Unit Fan IPM
				3	Slave2 Outdoor Unit FAN IPM Fault Error	Instant Over Current at Slave2 Outdoor Unit Fan IPM
				4	Slave3 Outdoor Unit FAN IPM Fault Error	Instant Over Current at Slave3 Outdoor Unit Fan IPM
	1	0	7	1	Master Outdoor Unit Fan DC Link Low Voltage Error	Master Outdoor Unit Fan DC Link Input Voltage is under 380V
				2	Slave1 Outdoor Unit Fan DC Link Low Voltage Error	Slave1 Outdoor Unit Fan DC Link Input Voltage is under 380V
				3	Slave2 Outdoor Unit Fan DC Link Low Voltage Error	Slave2 Outdoor Unit Fan DC Link Input Voltage is under 380V
				4	Slave3 Outdoor Unit Fan DC Link Low Voltage Error	Slave3 Outdoor Unit Fan DC Link Input Voltage is under 380V
	1	1	3	1	Master Outdoor Unit Liquid pipe Temperature Sensor Error	Liquid pipe temperature sensor of Master Outdoor Unit is open or short
				2	Slave1 Outdoor Unit Liquid pipe Temperature Sensor Error	Liquid pipe temperature sensor of slave1 Outdoor Unit is open or short
				3	Slave2 Outdoor Unit Liquid pipe Temperature Sensor Error	Liquid pipe temperature sensor of slave2 Outdoor Unit is open or short
				4	Slave3 Outdoor Unit Liquid pipe Temperature Sensor Error	Liquid pipe temperature sensor of slave3 Outdoor Unit is open or short
Outdoor unit related error	1	1	5	1	Master Outdoor Unit Subcooling Outlet Temperature Sensor Error	Master Outdoor Unit Subcooling Outlet Temperature Sensor open or short
				2	Slave1 Outdoor Unit Subcooling Outlet Temperature Sensor Error	Slave1 Outdoor Unit Subcooling Outlet Temperature Sensor open or short
				3	Slave2 Outdoor Unit Subcooling Outlet Temperature Sensor Error	Slave2 Outdoor Unit Subcooling Outlet Temperature Sensor open or short
				4	Slave3 Outdoor Unit Subcooling Outlet Temperature Sensor Error	Slave3 Outdoor Unit Subcooling Outlet Temperature Sensor open or short
	1	5	1	1	Failure of operation mode conversion at Master Outdoor Unit	Pressure unbalance between Outdoor Units
				2	Failure of operation mode conversion at Slave1 Outdoor Unit	Pressure unbalance between Outdoor Units
				3	Failure of operation mode conversion at Slave2 Outdoor Unit	Pressure unbalance between Outdoor Units
				4	Failure of operation mode conversion at Slave3 Outdoor Unit	Pressure unbalance between Outdoor Units
	1	5	3	1	Master upper part heat exchanger temperature sensor error	Master Outdoor Unit upper part temperature sensor open/short
				2	Slave1 upper part heat exchanger temperature sensor error	Slave1 Outdoor Unit upper part temperature sensor open/short
				3	Slave2 upper part heat exchanger temperature sensor error	Slave2 Outdoor Unit upper part temperature sensor open/short
				4	Slave3 upper part heat exchanger temperature sensor error	Slave3 Outdoor Unit upper part temperature sensor open/short
	1	5	4	1	Master lower part heat exchanger temperature sensor error	Master Outdoor Unit lower part temperature sensor open/short
				2	Slave1 lower part heat exchanger temperature sensor error	Slave1 Outdoor Unit lower part temperature sensor open/short
				3	Slave2 lower part heat exchanger temperature sensor error	Slave2 Outdoor Unit lower part temperature sensor open/short
				4	Slave3 lower part heat exchanger temperature sensor error	Slave3 Outdoor Unit lower part temperature sensor open/short
	1	7	3	1	Master Outdoor Unit Constant Speed Compressor Fault	Comp locking, Check Valve leakage, comp dielectric break down at Master Outdoor Unit
				2	Slave1 Outdoor Unit Constant Speed Compressor Fault	Comp locking, Check Valve leakage, comp dielectric at Slave1 Outdoor Unit
				3	Slave2 Outdoor Unit Constant Speed Compressor Fault	Comp locking, Check Valve leakage, comp dielectric at Slave2 Outdoor Unit
				4	Slave3 Outdoor Unit Constant Speed Compressor Fault	Comp locking, Check Valve leakage, comp dielectric at Slave3 Outdoor Unit
	1	7	4	1	Master outdoor unit rated speed 2 condenser over-current	Master Outdoor Unit rated speed 2 condenser burned / locked or fault by over-current
				2	Slave1 outdoor unit rated speed 2 condenser over-current	Slave1 Outdoor Unit rated speed 2 condenser burned / locked or fault by over-current
				3	Slave2 outdoor unit rated speed 2 condenser over-current	Slave2 Outdoor Unit rated speed 2 condenser burned / locked or fault by over-current
				4	Slave3 outdoor unit rated speed 2 condenser over-current	Slave3 Outdoor Unit rated speed 2 condenser burned / locked or fault by over-current

	Display Title Cause of Error
Outdoor unit related error	182		1	Master outdoor unit Main Board Main-Sub Micom communication error	Master Outdoor Unit Main Board Main-Sub Micom communication failed
			2	Slave1 outdoor unit Main Board Main-Sub Micom communication error	Slave1 Outdoor Unit Main Board Main-Sub Micom communication failed
			3	Slave2 outdoor unit Main Board Main-Sub Micom communication error	Slave2 Outdoor Unit Main Board Main-Sub Micom communication failed
			4	Slave3 outdoor unit Main Board Main-Sub Micom communication error	Slave3 Outdoor Unit Main Board Main-Sub Micom communication failed
	184		1	Master Inv. oil equalizing pipe Temperature Sensor error	Master Outdoor Unit oil equalizing temperature Sensor open or short
			2	Slave1 Inv. oil equalizing pipe Temperature Sensor error	Slave1 Outdoor Unit oil equalizing temperature Sensor open or short
			3	Slave2 Inv. oil equalizing pipe Temperature Sensor error	Slave2 Outdoor Unit oil equalizing temperature Sensor open or short
			4	Slave3 Inv. oil equalizing pipe Temperature Sensor error	Slave3 Outdoor Unit oil equalizing temperature Sensor open or short
	185		1	Master const.1 oil equalizing pipe Temperature Sensor error	Master Outdoor Unit oil equalizing temperature Sensor open or short
			2	Slave1 const.1 oil equalizing pipe Temperature Sensor error	Slave1 Outdoor Unit oil equalizing temperature Sensor open or short
			3	Slave2 const.1 oil equalizing pipe Temperature Sensor error	Slave2 Outdoor Unit oil equalizing temperature Sensor open or short
			4	Slave3 const.1 oil equalizing pipe Temperature Sensor error	Slave3 Outdoor Unit oil equalizing temperature Sensor open or short
	186		1	Master const.2 oil equalizing pipe Temperature Sensor error	Master Outdoor Unit oil equalizing temperature Sensor open or short
			2	Slave1 const.2 oil equalizing pipe Temperature Sensor error	Slave1 Outdoor Unit oil equalizing temperature Sensor open or short
			3	Slave2 const.2 oil equalizing pipe Temperature Sensor error	Slave2 Outdoor Unit oil equalizing temperature Sensor open or short
			4	Slave3 const.2 oil equalizing pipe Temperature Sensor error	Slave3 Outdoor Unit oil equalizing temperature Sensor open or short
	193		1	Excessive increase of Master Outdoor Unit Fan PCB Heat Sink Temperature	Master Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
			2	Excessive increase of Slave1 Outdoor Unit Fan PCB Heat Sink Temperature	Slave1 Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
			3	Excessive increase of Slave2 Outdoor Unit Fan PCB Heat Sink Temperature	Slave2 Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
			4	Excessive increase of Slave3 Outdoor Unit Fan PCB Heat Sink Temperature	Slave3 Outdoor Unit Fan Inverter PCB Temperature is Over 95°C
	194		1	Master Outdoor Unit Fan PCB Heat Sink Temperature Sensor Error	Master Outdoor Unit Fan PCB Heat Sink Temperature Sensor open or short
			2	Slave1 Outdoor Unit Fan PCB Heat Sink Temperature Sensor Error	Slave1 Outdoor Unit Fan PCB Heat Sink Temperature Sensor open or short
			3	Slave2 Outdoor Unit Fan PCB Heat Sink Temperature Sensor Error	Slave2 Outdoor Unit Fan PCB Heat Sink Temperature Sensor open or short
			4	Slave3 Outdoor Unit Fan PCB Heat Sink Temperature Sensor Error	Slave3 Outdoor Unit Fan PCB Heat Sink Temperature Sensor open or short

New Function

■ Multi V III provides as following new functions.

New Function Applied item
Cool/Heat selector (PRDSBM)	Cooling/ Heating/ FanCooling/ Heating/ All OFF	ODUSolution Accessory
ODU Dry contact (PQDSBDCVM0)	Demand control-. Low load operation-. DDC control (DC0~10V Input)	ODUSolution Accessory
	ODU Fan Low speed control(Night low noise operation)
	Error alarm
Independent Power module Independent power module Solution Accessory ('11.01 available)

* If you want to get more details, refer to each installation Manuals.

■ Out Feature

- Cool/ Heat Selector

graph TD
    A["Sensor"] --> B{Function}
    B --> C["Sun"]
    B --> D["Star"]
    B --> E["Light Bulb"]
    B --> F["Light Bulb"]
    B --> G["Light Bulb"]

Top-down schematic of an electronic device casing with various components and connectors (no text or labels)

1 Cool/ Heat selector

1.1 Cool/ Heat Selector has provided two different functions.

• Cooling/ heating/ Fan lock mode
• Cooling/ heating/ All OFF mode

[Installation]

1. Check the contents of Cool/ Heat Selector

Close-up of a device's internal panel with four icons and connecting lines, no visible text or symbols

Simple diagram of a rectangular device with a logo and label 'LG' above it (no text or symbols on the device itself)

1. Connect Outdoor Main PCB and Cool/ Heat Selector.

- Connect terminals on the back side of Cool/Heat Selector to terminal of Outdoor as show

GND GND shows field wiring connected wiring 1 2 3 4 1 2 3 4 Push Button - Insert wire method - Push arrow direction. Insert wire to connector.

* Communication line length can be maximum 300m, use communication line as thick as 1.25mm ^2 .

1.2 ODU Dry contact

ODU Dry contact has provided Three different functions.

• Demand control
• Night Low Noise control
• Error Alarm Monitoring function

[ODU Dry contact]

- Feature and Parts Naming

1 2 3 4 5 15 14 13 12 6 7 8 91011

1. SWDIP : Switch to select main function
2. SW_Address2 : Switch to set a upper address of the outdoor unit
3. SW_Address1 : Switch to set a lower address of the outdoor unit
4. SW_STEP : Switch to select a control mode.
5. CN_PWR : DC Input terminal
6. ERROR : Error display with relay contact
7. BUS-A : RS-485 (+) Terminal
8. BUS-B : RS-485 (-) Terminal
9. CN_CAPACITY : Signal input terminal to control a capacity of outdoor unit
10. CN_SPEED/CAP : Signal input terminal for Analog Input/Low noise operation
11. CN_OUT : Outdoor unit connector
12. LED1 : Display LED for RS-485 status
13. LED01G,02G,03G : Display LED for communication status
14. CN_JIG : Connector for writing program
15. SW1 : Reset switch

- Installation

1. ODU Dry contact single installation : Connect with ODU both single Unit and Series.

graph TD
    A["RS-485"] --> B["Bus_A"]
    A --> C["Bus_B"]
    B --> D["Server 1"]
    B --> E["Server 2"]
    C --> F["Server 3"]
    C --> G["Server 4"]

1. ODU Dry contact with Central controller

: With Single Outdoor unit

CN_OUT TTL Multi-V WIRE ASSY 1(1EA)

: With Series Outdoor units

graph TD
    A["Central Control Devices"] -->|BUS_A| B["WIRE ASSY 1(1EA)"]
    A -->|BUS_B| B
    B --> C["Switcher 1"]
    B --> D["Switcher 2"]
    B --> E["Switcher 3"]
    C --> F["Output"]
    D --> F
    E --> F

2 New Dry contact

2.1 Demand Control

ODU Dry contact has provided Two different methods for Demand control

- Using Contact signal

: High/ Low pressure value s are changed by setting value of Rotary S/W

- Using Analog signal with DDC Module

: High/ Low pressure value s are changed by setting value of DDC Module.(DC 0\~10V)

[Rotary S/W setting]

SW_STEP Input Signal

0, 1, 2, 3, 4, 5, 6 Contact signal

D, E Analog signal

[Setting]

SW_STEP Using Contact signal Using Analog signal with DDC Module

- Each connecting methods

1. Using Contact signal

SW VOLT2 SW VOLT1 Notes Do not input the voltage signal in NON VOLT* settling mode otherwise will cause serious damage. LG does not supply this section (Field supply)

SW VOLT2 SW VOLT1 Connect separate External voltage of DC12V LG does not supply this section (Field supply) Input LNO comm Input 2 8mm Input 1 Output 3

2. Using Analog signal with DDC Module

SW_VOLT2 SW_VOLT1 DC 0~10V input GND Direct Digital Controller

[Control Value]

- Using Contact signal

Rotary S/W	Volt	Cooling Heating
		Step Control Step Control
D	0 0 Not-Control 0				Not-Control
	1 1 100% 0 100%
	2 2	90%	0	90%
	3 3	80%	0	80%
	4 4	70%	0 0	70%
	5 5	60%	0	60%
	6 6	50%	0	50%
	7 7	45%	0	45%
	8 8	40%	0	40%
	9 9	Comp	OFF 0	Comp	OFF
	10	10	All OFF	0	All OFF

Rotary S/W	Volt	Cooling Heating
		Step Control		Control
E	0 9	Comp	OFF	0		Comp OFF
	1 8	40%		0	40%
	2 7	45%		0	45%
	3 6	52%		0	50%
	4 5	60%		0 0	60%
	5 4	70%		0	70%
	6 3	80%		0	80%
	7 2	90%		0	90%
	8 1 1	00%	0 100%
	9 1 1	00%	0 100%
	10	1 100%		0 100%

• Using Analog signal with DDC Module

SW_STEP	Input_1	Input_2	Input_3	Comp capacity Of outdoor unit(%)
0	0 0 0	No control
	1 0 0 70
	0 1 0 40
	0 0 1	COMP OFF
1	0 0 0	No control
	1 0 0 70
	0 1 0 50
	0 0 1	COMP OFF
2	0 0 0	No control
	1 0 0 80
	0 1 0 50
	0 0 1	COMP OFF
3	0 0 0	No control
	1	0	0	7
	0	1	0	4
	0	0	1 ALL	OFF
4	0 0 0	No control
	1	0	0	7
	0	1	0	5
	0	0	1 ALL	OFF
5	0 0 0	No control
	1	0	0	8
	0	1	0	5
	0	0	1 ALL	OFF
6	0 0 0	No control
	1	0	0	5
	0	1 0	COMP OFF
	0	0	1 ALL	OFF

2.2 Night Low Noise control

ODU Dry contact has provided Two methods for Night Low Noise Control

• Automatically operating
  : Using previous method
• Manual operating
  : Using simple switch and timer

[Setting]

- For ODU Dry contact

ON L1 2 3 4 Notes Default State is L1: ON, L2: ON Connect with S/W or Timer for Night Low Noise Control Position Function ON L1 2 3 4 ON : Master Mode OFF : Slave Mode ON : Enable Low Noise Operation OFF : Disable Low Noise Operation

• For Outdoor unit Refer to DIP S/W setting table

11.2.3 Error Alarm monitoring

ODU Dry contact has provided Error Alarm monitoring function

Notice for system fault information by buzzer or warning lamp. Occurring fault is not only ODUs but also IDUs.

[Setting]

Field Supply Error Display Power AC or DC (Depends on Operation display power type)

• Note AC Power : 3A @250V DC Power : 3A @30Vv

3 Independent power module

The main PCB controls the EEV kit when the power is turn on.

The independent sub PCB controls the EEV kit when the power is turn off.

graph TD
    A["ODU"] -->|3 phase 400V, 1 phase 220V| B["Switch BOX"]
    B --> C["each room"]
    D["“If the power Cut-off, then product need to close EEV.”"] --> E["independent power module (option)"]
    E --> F["Each room"]
    G["Concept of independent power module"] --> H["CN_EEV"]
    H --> I["EEV Operation signal"]
    I --> J["Each room"]
    K["Switch BOX"] --> L["each room"]
    M["Switch BOX"] --> N["Each room"]

Caution For Refrigerant Leak

The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available.

Introduction

Though the R410A refrigerant is harmless and incombustible itself, the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.

■ Limiting concentration

Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the unit of kg/m³ (Freon gas weight per unit air volume) for facilitating calculation.

Limiting concentration: 0.44kg/m³(R410A)

graph TD
    A["Outdoor unit"] --> B["(No.1 system)"]
    B --> C["Indoor unit"]
    C --> D["Flow of refrigerant"]
    D --> E["Room where refrigerant leaks (Refrigerant of the whole No.1 system flows out.)"]

Checking procedure of limiting concentration

Check limiting concentration along following steps and take appropriate measure depending on the situation.

■ Calculate amount of all the replenished refrigerant (kg) per each refrigerant system.

Amount of replenished refrigerant per one outdoor unit system + Amount of additional replenished refrigerant = Total amount of replenished refrigerant in refrigerant facility (kg) | Amount of replenished refrigerant at factory shipment | Amount of additionally replenished refrigerant depending on piping length or piping diameter at customer Note : In case one refrigerant facility is divided into 2 or more refrigerant systems and each system is independent, amount of replenished refrigerant of each system shall be adopted.

■ Calculate minimum room capacity

Calculate room capacity by regarding a portion as one room or the smaller room.

(1) Without partition

graph TD
    A["Indoor unit"] --> B["Outdoor unit"]
    C["Indoor unit"] --> D["Outdoor unit"]

(2) With partition and with opening which serve as passage of air to adjoining room

Outdoor unit Indoor unit Opening Partition In the case of opening without door, or 0.15 % or more openings (to floor space) both above and below door)

(3) With partition and without opening which serve as passage of air to adjoining room

graph TD
    A["Outdoor unit"] --> B["Indoor unit"]
    B --> C["Smallest room"]
    C --> D["Indoor unit"]

■ Calculate refrigerant concentration

$$ \frac{\text{Total amount of replenished refrigerant in refrigerant facility (kg)}}{\text{Capacity of smallest room where indoor unit is installed (m}^3)} = \begin{array}{c}\text{Refrigerant concentration}\ \mid \ (\mathrm{R410A}) \end{array} (\mathrm{kg / m}^3) $$

In case the result of calculation exceeds the limiting concentration, perform the same calculations by shifting to the second smallest, and the third smallest rooms until at last the result is below the limiting concentration.

In case the concentration exceeds the limit

When the concentration exceeds the limit, change original plan or take one of the countermeasures shown below:

- Countermeasure 1

Provide opening for ventilation.

Provide 0.15% or more opening to floor space both above and below door, or provide opening without door.

- Countermeasure 2

Provide gas leak alarm linked with mechanical ventilator.

Reducing the outdoor refrigerant qty.

graph TD
    A["Countermeasure 2"] --> B["Gas leak alarm"]
    A --> C["Mechanical ventilator"]
    D["Indoor unit"] --> E["Opening effective to ventilation"]
    F["Countermeasure 1"] --> G["Opening effective to ventilation"]

Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is heavier than air.

Installation guide at the seaside

CAUTION

1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it needs additional anticorrosion treatment on the heat exchanger.

Selecting the location(Outdoor Unit)

1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided. Install the outdoor unit on the opposite side of the sea wind direction.

Sea wind Sea wind

2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.

Windbreak Sea wind

3) Select a well-drained place.

• It should be strong enough like concrete to prevent the sea wind from the sea.
• The height and width should be more than 150% of the outdoor unit.

• It should be keep more than 70 cm of space between outdoor unit and the windbreak for easy air flow.

• If you can't meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.

• Periodic (more than once/year) cleaning of the dust or salt particles stuck on the heat exchanger by using water

LG

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