AM048TXMDCH - Separator SAMSUNG - Free user manual and instructions

Product type	Split Air Conditioner (Ceiling Cassette)
Indoor unit dimensions (WxHxD)	840 x 240 x 840 mm
Outdoor unit dimensions (WxHxD)	900 x 800 x 320 mm
Indoor unit weight	20 kg
Outdoor unit weight	60 kg
Power supply	220-240 V, 50/60 Hz, Single phase
Cooling capacity	48,000 BTU/h (14.1 kW)
Heating capacity	54,000 BTU/h (15.8 kW)
Operating modes	Cooling, Heating, Dehumidification, Fan only, Auto
Special functions	Turbo mode, Sleep mode, Timer, Self-cleaning, Wi-Fi control
Refrigerant type	R410A
Indoor noise level	30-45 dB
Outdoor noise level	55 dB
Maintenance	Clean air filter every 2 weeks; professional check annually
Safety features	Overload protection, anti-freeze, auto restart, voltage stabilizer
Spare parts	Remote control, air filters, fan motor, compressor, PCB, sensors
Repairability index	7.5/10 (estimated)
General information	Indoor unit: ceiling cassette; outdoor unit: heat pump; suitable for commercial and large residential spaces

Frequently Asked Questions - AM048TXMDCH SAMSUNG

What are the dimensions of the indoor unit?

The indoor unit dimensions are 840 x 240 x 840 mm (WxHxD).

How do I clean the air filters?

Open the front panel, remove the filters, vacuum or wash with mild detergent, then dry and reinstall. Clean every two weeks.

What type of refrigerant does this unit use?

It uses R410A refrigerant, which is environmentally friendly and efficient.

Can I control the unit with my smartphone?

Yes, the unit supports Wi-Fi control via the Samsung SmartThings app (sold separately).

What is the cooling capacity?

The cooling capacity is 48,000 BTU/h (14.1 kW), suitable for large rooms or open spaces.

Does it have a heating function?

Yes, it provides heating with a capacity of 54,000 BTU/h (15.8 kW), functioning as a heat pump.

How do I reset the timer?

Press the Timer button on the remote control repeatedly to set or cancel the timer. Refer to the manual for detailed steps.

What are the safety features?

It includes overload protection, anti-freeze, auto restart after power failure, and voltage stabilizer to prevent damage.

What is the noise level?

Indoor unit: 30-45 dB; outdoor unit: 55 dB. Lower speeds produce less noise.

Where can I find spare parts?

Authorized Samsung service centers and online retailers offer spare parts like remote controls, filters, and motors.

USER MANUAL AM048TXMDCH SAMSUNG

• Thank you for purchasing this Samsung Product.
• Before operating this unit, please read this installation manual carefully and retain it for future reference.

Contents

Safety precautions 3

Outdoor unit type 5

Installation combination 5

Deciding where to install the outdoor unit 6

Installation location 8

Installation and base ground work for an outdoor unit 10

Refrigerant pipe installation 12

Wiring work 31

Grounding work 36

Basic segment display 37

Setting outdoor unit option switch and key function 37

Pump Down 44

Checking lists after finishing installation 46

Inspection and check operation 47

Automatic refrigerant amount detection function (Checking the amount of refrigerant) 49

Trial operation 50

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Carefully follow the precautions listed below because they are essential to guarantee the safety of the equipment.

WARNING

• Always disconnect the air conditioner from the power supply before servicing it or accessing its internal components.
• Verify that installation and testing operations are performed by qualified personnel.
• Verify that the air conditioner is not installed in an easily accessible area.

General information

Carefully read the content of this manual before installing the air conditioner and store the manual in a safe place in order to be able to use it as reference after installation. For maximum safety, installers should always carefully read the following warnings. ▶ Store the operation and installation manual in a safe location and remember to hand it over to the new owner if the air conditioner is sold or transferred. This manual explains how to install an indoor unit with a split system with two SAMSUNG units. The use of other types of units with different control systems may damage the units and invalidate the warranty. The manufacturer shall not be responsible for damages arising from the use of non-compliant units. The manufacturer shall not be responsible for damage originating from unauthorized changes or the improper connection of electric and requirements set forth in the "Operating limits" table, included in the manual. Making such changes or improper connections may damage the units and invalidate the warranty. The air conditioner should be used only for the applications for which it has been designed: the indoor unit is not suitable to be installed in areas used for laundry. Do not use the units if damaged. If problems occur, switch the unit off and disconnect it from the power supply. In order to prevent electric shocks, fires or injuries, always stop the unit, disable the protection switch and contact SAMSUNG's technical support if the unit produces smoke, if the power cable is hot or damaged or if the unit is very noisy. ▶ Always remember to inspect the unit, electric connections, refrigerant tubes and protections regularly. These operations should be performed by qualified personnel only. The unit contains moving parts, which should always be kept out of the reach of children. Do not attempt to repair, move, alter or reinstall the unit. If performed by unauthorized personnel, these operations may cause electric shocks or fires. ▶ Do not place containers with liquids or other objects on the unit. ▶ All the materials used for the manufacture and packaging of the air conditioner are recyclable. The packing material and exhaust batteries of the remote controller (optional) must be disposed of in accordance with current laws. The air conditioner contains a refrigerant that has to be disposed of as special waste. At the end of its life cycle, the air conditioner must be disposed of in authorized centers or returned to the retailer so that it can be disposed of correctly and safely. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. When the product operates in heat mode during winter time, it operates protection mode when the outdoor temperature drops below 0°C (32°F). Therefore, supply the power during winter time. If the power is not supplied, compressor protection mode will not operate and cause product malfunction.

Safety precautions

Installing the unit

IMPORTANT: When installing the unit, always remember to connect first the refrigerant tubes, then the electrical lines. Always disassemble the electric lines before the refrigerant tubes.

Upon receipt, inspect the product to verify that it has not been damaged during transport. If the product appears damaged, DO NOT INSTALL it and immediately report the damage to the carrier or retailer (if the installer or the authorized technician has collected the material from the retailer). After completing the installation, always carry out a functional test and provide the instructions on how to operate the air conditioner to the user. Do not use the air conditioner in environments with hazardous substances or close to equipment that release free flames to avoid the occurrence of fires, explosions or injuries. Our units should be installed in compliance with the spaces shown in the installation manual, to ensure accessibility from both sides and allow repairs or maintenance operations to be carried out. The unit's components should be accessible and easy to disassemble without endangering people and objects. For this reason, when provisions of the installation manual are not complied with, the cost required to access and repair the units (in SAFETY CONDITIONS, as set out in prevailing regulations) with harnesses, ladders, scaffolding or any other elevation system will NOT be considered part of the warranty and will be charged to the end customer.

Power supply line, fuse or circuit breaker

Always make sure that the power supply is compliant with current safety standards. Always install the air conditioner in compliance with current local safety standards. Always verify that a suitable grounding connection is available. Verify that the voltage and frequency of the power supply comply with the specifications and that the installed power is sufficient to ensure the operation of any other domestic appliance connected to the same electric lines. Always verify that the cut-off and protection switches are suitably dimensioned. Verify that the air conditioner is connected to the power supply in accordance with the instructions provided in the wiring diagram included in the manual. Always verify that electric connections (cable entry, section of leads, protections...) are compliant with the electric specifications and with the instructions provided in the wiring scheme. Always verify that all connections comply with the standards applicable to the installation of air conditioners. Devices disconnected from the power supply should be completely disconnected in the condition of overvoltage category.

Outdoor unit type

Shape
Model Cooling and Heating 1 phase			AM036TXMDCHAM048TXMDCHAM053TXMDCH

Installation combination

You must install the indoor unit that uses R-410A only.

If the sum capacity of the combined indoor units exceeds the capacity of an outdoor unit, the capacity of each indoor unit is reduced below the rated capacity. Therefore, keeping the combination of indoor units within the capacity of an outdoor unit is recommended.

Outdoor unit Outdoor	unit capacity (HP)	The maximum number of connectable indoor units (ea)	Total capacity of the connected indoor units (KW)
AM036TXMDCH 4(3) 8 6	0~15.7(20~54)
AM048TXMDCH 5(4) 9 7	0~18.2(24~62)
AM053TXMDCH 6(4.5) 10	7.8~20.2(27~69)

Accessories

▶ You must keep the following accessories until the installation is finished. ▶ Hand over the installation manual to the customer after finishing the installation.

Manual (1) Drain plug (1) Rubber Leg (4) Drain cap (3)

Deciding where to install the outdoor unit

Decide the installation location based on the following conditions and obtain the user's approval.

▶ Avoid a place that may disturb your neighbor. Noise may occur from the outdoor unit and the discharged air may run into the neighborhood. (Be careful of the operation time in a residential area)

▶ Install the outdoor unit on a hard and even area that can support its weight. ▶ Choose a flat place where rainwater does not settle or leak. ▶ Choose a place that will avoid strong winds.

▶ Choose a place that is well ventilated and allows enough space for repairs and service.

(Discharge duct can be purchased privately.)

▶ Choose a place where the connection of refrigerant pipe between an indoor unit and outdoor unit is within allowed distance.

▶ Make sure that the condensed water dripping from the drain hose runs out properly and safely.

▶ Choose a place where flammable gas does not leak. ▶ Choose a place where the unit could not come into contact with snow and rain.

▶ When installing the outdoor unit near the seashore, make sure it is not directly exposed to sea breeze.

- When installing the outdoor unit near the seashore, consult the qualified installer since the places above require additional measures for corrosion resistance. (You should remove salt and dust from the heat exchanger at least once a year.)

Installation Guide at the Seashore

Make sure to follow the guides below when installing near the seashore.

1) Do not install the product in a place where it is directly exposed to sea water and sea breeze.

• Make sure to install the product behind a structure (such as a building) that can block sea breeze.
• Even when it is inevitable to install the product near the seashore, make sure that the product is not directly exposed to sea breeze by installing a protection wall.

2) Consider that the salinity particles clinging to the external panels should be sufficiently washed out. 3) Because the residual water at the bottom of the outdoor unit significantly promotes corrosion, make sure that the slope does not disturb drainage.

- Keep the floor level so that rain does not accumulate.

- Be careful not to block the drain hole due to foreign substances.

4) When the product is installed near the seashore, periodically clean it with water to remove attached salinity. 5) Make sure to install the product in a place that provides smooth water drainage. Especially, ensure that the base part has good drainage. 6) If the product is damaged during installation or maintenance, make sure to repair it. 7) Check the condition of the product periodically.

- Check the installation site every 3 months and perform anti-corrosion treatment such as R-Pro supplied by SAMSUNG (Code: MOK-220SA) or commercial water repellent grease and wax, etc., based on the product condition.

- When the product is to be shut down for a long period of time, such as off-peak hours, take appropriate measures like covering the product.

8) If the product is installed within 500m of the seashore, special anti-corrosion treatment is required.

* Please contact your local SAMSUNG representative for further details.

The protection wall should be constructed with a solid material that can block the sea breeze, and the height and width of the wall should be 1.5 times larger than the size of the outdoor unit. (You must secure more than 700mm of space between the protection wall and the outdoor unit for air circulation.)

• Install the indoor unit away from any interfering sources such as radio, computer, stereo equipment, and also select a place where the electrical wiring work and an indoor unit installation are possible.

• Especially keep the unit at least 3m (9.84ft) away from the electrical equipment in an area where weak electromagnetic waves are generated, and install the protection tube to protect the main power cable and communication cable.
• Make sure that there is no equipment that generates electromagnetic waves. If so, malfunction of the control system may occur due to the effect of the electromagnetic wave. (For example: The remote control sensor of the indoor unit may not have good reception in an area with fluorescent lamp style lighting.)
• Make sure the outdoor unit is installed in a safe place where it will not be obstructed by snowfall. The frame should be installed in a place where the air inlet and heat exchanger of the unit are not buried in the snow.
• A ventilation system may be required when the outdoor unit is installed in a closed space or room, even though R410a is not poisonous or flammable. • Install railing around the outdoor unit to prevent it falling when the unit is installed on a high place such as the roof of the building.
• Avoid installing the units in places near an exhaust pipe and ventilating opening exposed to corrosive gas, oxides of sulfur, ammonia gas or sulfur gas herbicides. (These places need additional anticorrosive treatments. Please contact manufacture to avoid corroding copper pipes or soldered parts.)
• There shouldn't be any inflammable material such as wood and oil around the indoor unit. Otherwise, external fire may spread to the product.
• According to the condition of power supply, electric noise or unstable voltage can occur malfunction of electric parts or control system. (At the ship or places using power supply from electric generator... etc)

▶ Make sure that the water dripping from the drain hose runs away correctly and safely. ▶ You should repaint or protect the damaged part so that the paint of the cabinet does not peel off and become rusty during installation. When the cabinet becomes rusty, the life of an outdoor will be reduced.

Installation location

▶ Make a space for ventilation and service as seen in the picture.

When multiple outdoor units are combined for installation, allow enough space for ventilation against a wall. If the ventilation space is not allowed, product malfunction may occur.

The side with logo is the front side of the outdoor unit.

* Figure Description

Top view Side view
de : Air intake		Back side :Air intake

• , Air flow direction.

When installing 1 outdoor unit

Unit: mm (inch)

* When the air outlet is opposite the wall

* When 3 sides of the outdoor unit are blocked by the wall

* The upper part of the outdoor unit is blocked and the air outlet is opposite the wall

* When the air outlet is toward the wall

* The upper part of the outdoor unit is blocked and the air outlet is toward the wall

* When the walls are blocking front and the rear of the outdoor unit

Unit: mm (inch)

* When 3 sides of the outdoor unit are blocked by the wall

* When the walls are blocking front and the rear of the outdoor units

* When front and rear side of the outdoor unit is toward the wall

WARNING

- Should adopt bar type louver. Don't use a type of rain resistance louver.

- Louver specifications. - Angle criteria: less than 20° - Opening ratio criteria: greater than 80%

Installation location

Moving the Outdoor Unit

▶ Select the moving route in advance. ▶ Be sure that the moving route is safe considering the weight of the outdoor unit.

▶ Do not tilt the product more than 30° when carrying it. (Do not lay the product down on its side.) The surface of the heat exchanger is sharp. Be careful not to get injured while moving and installing.

When moving with a crane or wire rope

▶ When moving an outdoor unit to a higher place such as a rooftop.

• Fasten the wire rope as shown in the picture.
• Move the outdoor unit with the product packed to prevent possible product damage during transportation.

When moving an outdoor unit by hand

▶ Moving the outdoor unit by lifting and carrying it for short distances.

• Two people should carry the outdoor unit by holding the transportation handles.
• Be careful not to damage the heat exchanger on the rear side of the outdoor unit during transportation.
• Be careful not to get hurt by the sharp surface of the heat exchanger.

Installation and base ground work for an outdoor unit

▶ Install the outdoor unit 150mm (6 inches) higher than the base ground and install the drain hole to connect the pipe to the drainage. When the front fan of an outdoor unit is installed in a place where the average snowfall is more than 150mm (6 inches), the discharge duct should be attached to the outdoor unit.

The concrete foundation should be 1.5 times larger than the bottom of the outdoor unit.

It is necessary to install wire mesh or steel bars when outdoor units are installed on a soft foundation.

▶ When installing multiple outdoor units in the same place, install the

H beam on the base ground.

(When installing a number of outdoor units, you can install them on the base ground.)

▶ Install the H beam [150mm (6 inch) x 150mm (6 inch) x t10: basic specification] or vibration absorption frame so that it protrudes from the base ground.

▶ After installing the H beam, apply corrosion protection. ▶ Install a square pad [t=20mm (1 inch) or more] to prevent vibration from the outdoor unit onto the base ground. Place the outdoor unit on the H beam and fix it with bolts, nuts, and washers. (Fix with M10 basic anchor bolts, nuts, and washers.)

Base ground work

The outdoor unit should be supported within the range of measurements below for base ground work.

When the outdoor unit needs to be supported, fix it with wire as shown in the picture.

- Slightly loosen the four screws on the top cover of the outdoor unit.

- Wind wires around the four screws and tighten the screws again.

- Fix the wires to the ground.

• If the outdoor unit is not fixed securely, the product may fall and it might cause loss of life or property damage.
• Do not install the outdoor unit on a wooden pallet. • Fix the outdoor unit securely to the base ground with anchor bolts.
• The manufacturer is not responsible for damage caused by failure to adhere to the installation standard.
• To protect the outdoor unit from external conditions such as rain, install it on the base ground and connect the drain pipe to the drainage.

Refrigerant pipe installation

Refrigerant pipe work

The length of the refrigerant pipe should be as short as possible, and the height difference between an indoor unit and outdoor unit should be minimized. The piping length between the outdoor unit and the indoor unit may not exceed the allowable piping length, height difference, and the allowable length after branching is done. The pressure of R410A is high. Use only certified refrigerant pipe and follow the installation method. ▶ After pipe installation, charge the refrigerant according to the length of the pipe, and R410A refrigerant should be used. ▶ Use clean refrigerant pipe, and there shouldn't be any harmful ions, oxide, dust, iron content, or moisture inside the pipe. ▶ Use tools and accessories that fit R410A only.

- When installing, make sure there is no leakage. When collecting the refrigerant, stop the compressor first before removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the pipe inhales air and it makes the pressure inside the refrigerant cycle abnormally high. It may cause explosion and injury.

Tool Work If compatible with conventional tool
Pipe cutter	Refrigerant pipe work	Pipe cutting	Compatible
Flaring tool Pipe flaring
Refrigerant oil		Apply refrigerant oil on flared part	Exclusive ether oil, ester oil, alkali benzene oil or synthetic oil
Torque wrench Connect flare nut with pipe bending			Compatible
Pct.)ipe bender Pipe bending
Nitrogen gas	Air tightening test	Inhibition of oxidization
Brazing tool Pipe brazing
Manifold gauge	Air tightening test ~ additional refrigerant charging	Vacuuming, charging and checking operation	Need exclusive one to prevent mixture of R22 refrigerant oil use and also the measurement is not available due to the high pressure.
Refrigerant charging hose			Need exclusive one due to the refrigerant leakage or inflow of impurities.
Vacuum pump Vacuum drying		Compatible (Use products which contain the check valve to prevent the oil from flowing backward into the outdoor unit.) Use the one that can be vacuumed up to 100.7kpa(5Torr.-755mmHg).
Scale for refrigerant charging	leak test	Compatible
Gas leak detector Gas			Need exclusive one (The one for R134A can be used)
Flare nut	You must use the flare nut equipped with product. Refrigerant leakage may occur when the conventional flare nut for R22 is used.

Selecting refrigerant pipe

Temper grade and minimum thickness of the refrigerant pipe

Outer diameter [mm (inch)] Minimum thickness [mm (inch)] Temper grade
∅6.35 (1/4) 0.7 (0.028)
∅9.52 (3/8) 0.7 (0.028)
∅12.70 (1/2) 0.8 (0.031)
∅15.88 (5/8) 1.0 (0.039)
∅19.05 (3/4) 0.9 (0.035)
∅22.23 (7/8) 0.9 (0.035)

▶ Make sure to use C1220T-1/2H (Semi-hard) or C1220T-H pipe for more than ∅19.05mm (3/4 inch). In case of using C1220T-O (Soft) pipe for ∅19.05mm (3/4 inch), the pipe may be broken, which can result in an injury.

Pipe installation between an outdoor unit and the first Y-joint

Outdoor unit capacity [HP(Ton)]	Liquid pipe [mm (inch)] Gas	pipe [mm (inch)]	One step upgraded pipe [mm (inch)]
4(3) ∅9.52 (3/8) ∅1	5.88 (5/8) ∅19.05 (3/4)
5(4) ∅9.52 (3/8) ∅1	5.88 (5/8) ∅19.05 (3/4)
6(5) ∅9.52 (3/8) ∅1	9.05 (3/4) ∅22.23 (7/8)

▶ Install the refrigerant pipe according to the main pipe size of each outdoor unit capacity. When the pipe length between an outdoor unit and the farthest indoor unit including elbow exceeds 90m (295ft), the gas pipe size should be upgraded one step among the main pipes from the outdoor unit to the first Y-joint. (The liquid pipe size will be maintained.) ▶ If the capacity of the outdoor unit can decline due to the pipe length, upgrade the pipe size one step (gas pipe).

Pipe installation between Y-joints

Indoor unit total capacity[kW (Btu/h)]	Pipe diameter (O·D·mm)
	Liquid pipe [mm (inch)] Gas pipe [mm (inch)]
X ≤ 15.0 (51000)	∅9.52 (3/8)	∅15.88 (5/8)
15.0 (51000) < X ≤ 23.2 (79000) ∅19.05 (3/4)

Refrigerant pipe installation

Selecting Y-joint

▶ Select the first Y-joint according to the main pipe size of each outdoor unit capacity.

Select the other Y-joints according to the total indoor unit capacity under the selected Y-joint.

Selecting the first Y-joint Other Y-joints
Outdoor unit capacity [HP(Ton)]	Y-joint model
4(3)	MXJ-YA1509*
5(4)	MXJ-YA1509*
6(5) MXJ-YA2512*

Total indoor unit capacity under the selected Y-joint [kW (Btu/h)]	Y-joint model
X ≤ 15.0 (51000)	MXJ-YA1509*
15.0 (51000) < X ≤ 40.6 (138000)	MXJ-YA2512*

Keeping refrigerant pipe

To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean and dry and to seal it during installation.

Apply correct sealing method depending on the environment.

Exposure place Exposure time Sealing type
Outside exposure	Longer than one month Pipe pinch
	Shorter than one month Taping
Inside exposure - Taping

Refrigerant pipe brazing and safety information

Important information for refrigerant pipe work

Make sure that there is no moisture inside the pipe. Make sure that there are no foreign materials and impurities in the pipe. Make sure that there is no leak. Make sure to follow the instruction when brazing and keeping the pipe.

Nitrogen flushing brazing

Use Nitrogen gas when brazing the pipes as shown in the picture.

If you do not perform nitrogen flushing when brazing the pipes, oxide may form inside the pipe. It can cause the damage of the important parts such as compressor, valves. Adjust the flow rate of the Nitrogen flushing with a pressure regulator to maintain 0.05m3/h or less.

Direction of the pipe when brazing

Brazing the pipe should be done with the pipe headed downward or horizontally. Avoid brazing with the pipe headed upward.

CAUTION

The test liquid used to detect leakage after pipe brazing should be the designated one. The use of the test liquid containing sulfur element may cause pipe corrosion.

Cutting or Flaring the pipes

Make sure that you prepared the required tools.

Pipe cutter, reamer, flaring tool and pipe holder, etc.

If you want to shorten the pipe, cut it using a pipe cutter ensuring that the cut edge remains at 90° with the side of the pipe.

There are some examples of correctly and incorrectly cut edges below.

To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer. Carry out flaring work using flaring tool as shown below.

[Flaring tool]

Clutch type Wing nut type

Pipe diameter [mm (inch)]	A [mm (inch)]
	Flare tool for R-410A clutch type	Conventional flare tool
		Clutch type Wing nut type
∅6.35 (1/4) 0~0.5 (0~0.776)	1.0~1.5 (0.039~0.059)	1.5~2.0 (0.059~0.079)
∅9.52 (3/8) 0~0.5 (0~0.776)	1.0~1.5 (0.039~0.059)	1.5~2.0 (0.059~0.079)
∅12.70 (1/2) 0~0.5 (0~0.776)	1.0~1.5 (0.039~0.059)	1.5~2.0 (0.059~0.079)
∅15.88 (5/8) 0~0.5 (0~0.776)	1.0~1.5 (0.039~0.059)	1.5~2.0 (0.059~0.079)

Check that you flared the pipe correctly.

There are some examples of incorrectly flared pipes below.

Correct

Inclined

Damaged Surface

Cracked

Uneven Thickness

CAUTION

• If foreign matters or burrs are not removed after cutting the pipe, refrigerant gas may leak.
• If foreign matters enter inside the pipe, the important interior parts of the unit may get damaged or product efficiency will be reduced. So, the direction of the pipe should be downward during pipe cutting or flaring.

Refrigerant pipe installation

Tightening flare connection area

Check that the flaring is properly made.

Align the center of the piping and sufficiently tighten the flare nut with fingers. Finally, tighten the flare nut with a torque wrench until the wrench clicks. When tightening the flare nut with a torque wrench, ensure the direction for tightening follows the arrow on the wrench. Make sure to use ester oil to coat the flare connection section.

Outer diameter [D, mm (inch)]	Connection torque		Flare dimension [L, mm (inch)]	Flare shape [mm (inch)]
	kgf·cm N·m
∅6.35 (1/4) 140~180	14~18 8.70~9.10	(0.343~0.358)
∅9.52 (3/8) 350~430	34~42 12.80~13.	20(0.504~0.520)
∅12.70 (1/2) 500~620	49~61 16.20~16	60(0.638~0.654)
∅15.88 (5/8) 690~830	68~82 19.30~19	70(0.760~0.776)

• Blowing nitrogen gas should be done when brazing the pipe.
• Make sure to use the provided flare nut. Make sure that there are no cracks on the bent pipe.
• Do not fasten the flare nut with excessive strength.
• Use ester oil to coat the flare connection area to prevent refrigerant leak. R410A is a high pressure refrigerant. Therefore, there is a risk of refrigerant leakage if the flare connection is not coated with ester oil.

Pipe installation for an outdoor unit

Pipe direction

The refrigerant pipe can be pulled out from front, flank, rear, and bottom side, so install it depending on the installation site condition.

CAUTION

Caution for using knock-out hole

• Make sure not to damage the exterior of the outdoor unit.
• Remove all burrs at the edge of the knock-out hole and apply paint to prevent rust.
• Use a cable tube and bushing to prevent a cable from being damaged when passing through a knock-out hole. After installing pipes, block the unused knock-out hole to prevent small animals from entering. However, the radiant heat hole (A) should be able to intake air.

CAUTION

Caution for connecting the pipe

• When brazing the pipe, the unit may get damaged by a brazing fire and a flame. Use a flame-proofing cloth to protect the unit from a brazing fire or flame.
• The O-ring and Teflon packing inside the service valve may get damaged by a brazing fire. Wrap the bottom side of the service valve with a wet cloth and braze it as shown above. Make sure not to interrupt the brazing with the drips from the wet cloth.
• The connecting pipes of the liquid side and gas side should not contact each other nor should they contact the product. Vibration may cause damage to the pipes.

High pressure (Liquid side) Low pressure (Gas side)

Outdoor unit refrigerant pipe connection

Classification Front, flank, rear side of pipe connection Bottom side of pipe connection
Working process	First, remove the pipe cover from unit.Separate the knock-out hole to use. If the hole is open, small animals such as squirrels and rats may get into the unit through the hole and the unit may be damaged.	Separate the knock-out hole at the bottom side of the unit and install the pipe.After installing and insulating the pipe, close up the remaining gap. If the gap remains open, small animals such as rats and squirrels may get inside the unit and cause damage to the unit.

Refrigerant pipe installation

Refrigerant pipe installation examples

Using a Y-joint Using a Y-joint/EEV kit

Using a header joint Using a header joint/Y-joint

Allowable length of the refrigerant pipe and the installation examples

Connection by Y-joint

Outdoor unit

Connection by Y-joint/EEV kit

Outdoor unit

Classification Y-joint connection			tion Y-joint / EEV kit connection
Maximum allowable length of pipe	Outdoor unit ~ Indoor units	Actual Length	The distance between the outdoor unit and the farthest indoor unit ≤ 150m (492')
			Ex) 8 indoor unitsa+b+c+d+e+f+g+p≤ 150m (492')	Ex) 6 indoor unitsa+b+c+d+j ≤ 150m (492')
		Equivalent length	The distance between an outdoor unit and the farthest indoor unit ≤ 175m (574')
		Main pipe length	The main pipe(a) from the outdoor unit to the first Y-joint should be less than 110m (361').
		Total length	The sum of the total length of pipes should be less then 300m (984').
Maximum allowable height	Outdoor unit ~ Indoor units	Height	H1: The difference of height between an outdoor unit and indoor unit < 50m (164')
		Height H2:	The difference of height between indoor units ≤ 15m (49')
Maximum allowable length after Y-joint		Actual Length	The distance between the first Y-joint and the farthest indoor unit ≤ 40m (131')Ex) 8 indoor unitsb+c+d+e+f+g+p≤ 40m (131')	Allowable length between EEV kit and an indoor unit ≤ 20m (65')Ex) h, l, j ≤ 20m (65')

EEV Kit Model name Remarks
EEV Kit ~ Indoor units	Actual pipe length	2m (6.6') or less	MEV-E24SA	1 indoor	E24K200AApply to products without EEV (Wall mounted & ceiling)
			MEV-E32SA
		20m (66') or less	MXD-E24K132A	2 indoorMXD
			MXD-E32K200A
			MXD-E24K232A	3 indoor
			MXD-E24K300A
			MXD-E32K224A
			MXD-E32K300A

* When the equivalent length between an outdoor unit and the farthest indoor unit exceeds 90m (295'), upgrade the low pressure pipe of the main pipe one step.

Refrigerant pipe installation

Connection by header joint

Connection by Y-joint/header joint

Classification			Header joint connection	Y-joint / header joint connection
Maximum allowable length of pipe	Outdoor unit ~ Indoor units	Actual Length	The distance between an outdoor unit and the farthest indoor unit ≤ 150m (492')
			Ex) 8 indoor unitsa+g≤ 150m (492')	Ex) 8 indoor unitsa+b+c ≤ 150m (492')
		Equivalent length	The distance between an outdoor unit and the farthest indoor unit ≤ 175m (574')
		Main pipe length	The main pipe(a) from the outdoor unit to the first Y-joint should be less than 110m (361').
		Total length	The sum of total length of pipes should be less then 300m (984').
Maximum allowable height	Outdoor unit ~ Indoor units	Height	H1: The difference in height between an outdoor unit and indoor unit < 50m (164')
		Height	H2: The difference in height between indoor units ≤ 15m (49')
Maximum allowable length after Y-joint		Actual Length	The distance between the header joint and the indoor unit ≤ 40m (131')Ex) b, c ~ f, g ≤ 40m (131')	The distance between the first Y-joint and the farthest indoor unit ≤ 40m (131')Ex) 8 indoor unitsb+c, d+g ≤ 40m (131')

* When the equivalent length between an outdoor unit and the farthest indoor unit exceeds 90m (295'), upgrade the low pressure pipe of the main pipe one step.

Refrigerant pipe work

Refrigerant Y-joint installation

Install the Y-joint 'horizontally' or 'vertically'.

▶ Install horizontally

▶ Install vertically

NOTE

• When using A~J type of Y-joint, connect the Y-joint to the pipe with the provided reducer.
• When using K~Z type of Y-joint, connect the Y-joint to the pipe by cutting the inlet of the Y-joint or provided reducer properly.

CAUTION

• Install the Y-joint within ±15° on the horizontal or on the vertical. • Make sure that the pipe does not break at Y-joint and pipe connection. - Keep a minimum straight line distance of 500mm (20 inch) or more before connecting Y-joint.

* Install the Y-joint within ±15° on the horizontal or on the vertical.

Refrigerant pipe installation

	Correct use(The insertion depth of connecting pipe)	Incorrect use(The insertion depth of connecting pipe)
Basic specification	Connecting pipe Connecting pipe
When cutting connection part	Connecting pipe Connecting pipe

When inserting connecting pipe into the Y-joint, please comply with the installation regulation.

Refrigerant header joint installation

▶ Select the reducer fitted on the diameter of the pipe.

Liquid side Gas side

▶ Block the unused pipes end with caps if the number of connected indoor unit is fewer than header joint ports.

Liquid side Gas side
Brazina partCIOIBlock the port ofheader joint	CIOI[WHA]f

CAUTION

• When using A~J type of header joint, connect the header joint to the pipe with provided reducer.
• When using K~Z type of header joint, connect the header joint to the pipe by cutting the provided reducer properly.
• Connect the header joint in order respecting the number of the indoor unit.
• Connect the indoor unit as the highest capacity comes first.

▶ Install the header joint horizontally.

- Install the header joint horizontally so that it is not facing down.

Liquid side
Gas side

Refrigerant pipe installation

Performing air tightening test

▶ Use tools for R410A only to prevent the inflow of foreign substances and to resist the internal pressure.

▶ Use dry Nitrogen gas to do an airtight test as below.

If you apply pressure more than 4.1 MPa (gauge pressure), 595 psig., the pipes may be damaged. Apply pressure using pressure regulator.

After applying Nitrogen gas, check the change of pressure using pressure regulator.

If the pressure is changed, apply soapy water to check the leak. Check the pressure of the gas again.

After checking first gas leak, maintain 1.0 MPa (gauge pressure), 145 psig to check for further gas leaks.

- If the joint of high pressure side is disconnected and the nitrogen gas come into contact with human body, injury may occur. Tighten the joint connection firmly to prevent dangerous situation.

Vacuuming a pipe and an indoor unit

▶ Use the tools for R410A only to prevent the inflow of foreign substances and resist against the internal pressure. ▶ Use the vacuum pump with the check valve to prevent pump oil from flowing backward while the vacuum pump is stopped suddenly. ▶ Use the vacuum pump that can be vacuumed up to -100.7 kPa (gauge pressure), 5 torr. ▶ Close the service valve of the liquid side pipe, gas side pipe completely when performing air tightening test or vacuum drying.

Connect the manifold gauge to the liquid pipe and gas pipe.

Vacuum the liquid pipe and gas pipe using the vacuum pump.

Vacuum those pipes for more than 2 hours and 30 minutes.

Close the valve after checking the vacuum gauge pressure has reached -100.7 kPa (gauge pressure), 5 torr.

Check whether the pressure is maintained at -100.7 kPa (gauge pressure), 5 torr, for an hour.

Make sure to install a check valve to prevent pump oil from flowing into the pipe.

The time of vacuum drying may differ depending on the length of the pipe or outdoor temperature. Perform vacuum drying for at least 2 hours and 30 minutes.

Check the vacuum pressure using the vacuum gauge.

- If the pressure rises within an hour, either water remains inside the pipe, or there is a leak.

Refrigerant pipe installation

Selecting additional refrigerant charging

▶ Basic refrigerant

The basic amount of additional refrigerant charged at the factory

Model Refrigerant		Factory charge
		kg lbs
AM036TXMDCH	R410A	3.2 7.055
AM048TXMDCH 3.2 7.055
AM053TXMDCH 3.3 7.275

▶ Charging additional refrigerant

The amount of additional refrigerant charging =

The amount of refrigerant charging for pipe + the amount of refrigerant correction charging for an indoor unit.

1) The amount of additional refrigerant depending on the pipe size.

- The amount of additional refrigerant has to be calculated based on the sum of all liquid pipe lengths.

Size of liquid pipe [mm(inch)] 6.35 (1/4) 9.52 (3/8) 12.7 (1/2) 15.88 (5/8)
Additional amount [kg/m (lb/ft)]	0.02 (0.013)	0.06 (0.040)	0.125 (0.084)	0.18 (0.121)

Additional refrigerant charging calculation = The sum of total length of ∅ 9.52 liquid pipe (m) × 60g + the sum of total length of ∅ 6.35 liquid pipe (m) × 20g

Ex) a( 9.52)=40m(131.23') , b+c+d( 9.52)=15m(49.21') , e+f+g( 6.35)=15m(49.21')

The amount of additional refrigerant = 55m(180.45') x 60g + 15m(49.21') x 20g = 3600g

2) The amount of additional refrigerant for each indoor unit

[Unit: kg(lb)]

Capacity(kBtu) Model	5	6	7	9	12	15	18	20	24	27	30	32	36	48	54
1way cassette (AM***FN1DC*/AA, AM***NN1DC*/AA)			0.25 (0.55)	0.25 (0.55)	0.25 (0.55)
Mini 4way cassette S (600x600) (AM***KNNDC*/AA, AM***NNNDC*/AA)	0.37 (0.82)		0.37 (0.82)	0.29 (0.64)	0.29 (0.64)		0.37 (0.82)	0.37 (0.82)
4way cassette (AM***FN4DC*/AA, AM***NN4DC*/AA)				0.45 (0.99)	0.45 (0.99)		0.45 (0.99)		0.45 (0.99)		0.69 (1.52)		0.69 (1.52)	0.69 (1.52)
360 cassette (AM***KN4DC*/AA)				0.45 (0.99)	0.45 (0.99)		0.45 (0.99)		0.45 (0.99)		0.69 (1.52)		0.69 (1.52)	0.69 (1.52)
Floor Standing Unit (AM***JNFDC*/AA, AM***JNGDC*/AA)		0.12 (0.26)		0.22 (0.49)	0.22 (0.49)		0.32 (0.72)		0.32 (0.72)
Slim duct (AM***FNLDC*/AA)			0.24 (0.53)	0.24 (0.53)	0.24 (0.53)		0.45 (0.99)		0.45 (0.99)		0.45 (0.99)		0.45 (0.99)	0.62 (1.37)
MA duct (AM***JNMDC*/AA, AM***JNHDC*/AA)			0.37 (0.81)	0.37 (0.81)	0.37 (0.81)	0.54 (1.19)	0.54 (1.19)		0.47 (1.04)	0.47 (1.04)	0.47 (1.04)		0.68 (1.50)	0.68 (1.50)	0.91 (2.01)
MSP duct (AM***FNMDC*/AA)							0.28 (0.62)		0.28 (0.62)		0.54 (1.19)		0.54 (1.19)	0.68 (1.50)
HSP duct (AM***FNHDC*/AA)													0.68 (1.50)	0.68 (1.50)
Wall mounted (AM***MNVDC*/AA)	0.22 (0.49)		0.22 (0.49)	0.25 (0.55)	0.34 (0.75)	0.34 (0.75)	0.71 (1.57)		0.71 (1.57)	0.71 (1.57)

[Unit: kg(lb)]

Capacity(kBtu) Model	5	6	7	9	1	2	1	5	1	8	2	0	2	4	2
Ceiling (AM***FNCDC*/AA, AM***JNCDC*/AA)							0.39 (0.86)		0.39 (0.86)				0.56 (1.23)	0.95 (2.09)
V-AHU (AM***JNZDC*/AA)					0.33 (0.73)		0.5 (1.10)		0.5 (1.10)		0.83 (1.83)		0.88 (1.94)	1.18 (2.60)	1.27 (2.80)
MAX4 (AM***MNQDC*/AA)												0.68 (1.50)
GLOBAL DUCT (AM***MNMDC*/AA, AM***MNHDC*/AA)			0.45 (0.99)	0.45 (0.99)	0.45 (0.99)	0.45 (0.99)	0.45 (0.99)		0.68 (1.50)	0.68 (1.50)	0.68 (1.50)		0.84 (1.85)	0.84 (1.85)

Ex) When the indoor unit AM023FN1DCH/AA and AM052FNDNCH/AA are combined Additional refrigerant charging = 250g + 450g = 700g

3) The total amount of additional refrigerant charging = the amount of refrigerant charging for pipe + the amount of refrigerant for each indoor unit.

Ex) The amount of additional refrigerant charging = 3600g + 700g = 4300g

Connecting the drain hose to the outdoor unit

When using the air conditioner in the heating mode, ice may accumulate. During de-icing (defrost operation), the condensed water must be drained off safely. Consequently, you must install a drain hose on the outdoor unit, following the instructions below.

Leave space of more than 50mm (1.97 inch) between the bottom of the outdoor unit and the ground for installation of the drain hose, as shown in figure.

▶ Insert the drain plug into the hole on the underside of the outdoor unit. ▶ Connect the drain hose to the drain plug. ▶ Ensure that the drained water runs off correctly and safely.

▶ Be sure to plug the rest of drain holes not connected with drain plugs using drain caps.

Refrigerant pipe installation

Insulating refrigerant pipe or Y-joint

You must check for gas leaks before completing the installation process. After confirming that there are no gas leaks, insulate the pipe and hose.

Use EPDM insulation that meets the following conditions.

Item Unit Standard
Density g/cm	3	0.048~0.096
Dimension change route by heat % -5 or less
Water absorption rate g/cm	3	0.005 or less
Thermal conductivity kcal/m·h·°C	0.032 or less
Moisture transpiration factor ng/(m2·s·Pa) 15 or less
Moisture transpiration grade g/(m2·24h) 15 or less
Formaldehyde dispersion	mg/L	-
Oxygen rate	%	25 or more

Selecting the insulation for refrigerant pipes

Insulate the gas pipe and liquid pipe according to the insulation thickness specified for each pipe size. The standard conditions are 30°C (86°F) with humidity less than 85%. In high humidity conditions, use insulation one grade thicker.

Pipe	Pipe size [mm (inch)]	Insulation(Cooling, Heating)		Remarks
		Standard[30°C (86°F),Below 85%]	High humidity[30 °C (86°F),85% or more]
		EPDM, NBR
Liquid pipe	∅6.35 ~ ∅9.52 (1/4 ~ 3/8)	9t	←	Heat resisting temperature is more than 120°C (248°F)
	∅12.70 ~ ∅50.80 (1/2 ~ 2)	13t	←
Gas pipe	∅6.35 (1/4) 13t	19t
	∅9.52 (3/8)	19t	25t
	∅12.70 (1/2)
	∅15.88 (5/8)
	∅19.05 (3/4)
	∅22.23 (7/8)

Insulating refrigerant pipes

You must insulate the refrigerant pipes, Y-joints, header joints, and pipe connection areas. Proper insulation prevents condensation from dripping off the pipes. Check for any cracks in the insulation on bent pipes.

Secure the insulation tightly without any gaps.

Pipe insulation Pipe insulation after insulating EEV kit
The insulation of the gas and liquid pipes can be in contact with each other but they should not press excessively against each other.When contacting the gas side and liquid side pipe, use thicker insulation.	When installing the gas side and liquid side pipes, leave 10mm (3/8 inch) of space.When contacting the gas side and liquid side pipe, use thicker insulation.

• Install the insulation so that it does not expand, and apply adhesive to the connection parts to prevent moisture ingress. - If the refrigerant pipe is exposed to direct sunlight, wrap it with insulation tape. (When wrapping with finishing tape, be careful not to compress the insulation.) • Install the refrigerant pipe ensuring that the insulation does not become thinner at bends or pipe hangers. - If the insulation thickness is reduced, add additional insulation to compensate.

Refrigerant pipe installation

Insulating the header joint

Fasten the header joint with a cable tie and cover the connected part. Insulate the header joint and the brazed area, then wrap the connection with adhesive insulation tape to prevent condensation.

After insulating the header joint, secure it with a hanger.

Insulating the Y-joint and liquid/gas side connecting pipes

Attach the insulation provided with the Y-joint to the separately purchased insulation without any gaps. Wrap the connection with insulation (purchased separately) at least 10 mm (3/8") thick. Use insulation that can withstand temperatures above 120°C (248°F). Wrap the Y-joint with insulation at least 10 mm (3/8") thick.

* After insulating the pipe, apply adhesive insulation tape to the pipe as shown in the picture.

Wiring work

Wiring work should be performed in accordance with related laws such as 'Technical specification on electric installation,' 'Wiring regulations' or 'Installation manual'. ▶ Copper cable should be used for wiring work and all the wires or parts should be rated products.

▶ Wiring work should be performed by a company certified by an electric power company. ▶ Refer to the circuit diagram attached to the outdoor unit for detailed wiring work.

▶ Wiring work should be performed after disconnecting main circuit breaker and Y-joint switch.

▶ You must perform grounding work.

(Grounding resistance value should be less than 100Ω.)

When ELCB is installed, protective grounding resistance value can be applied.

(When the ELCB is 100mA, 0.1sec, protective grounding resistance value should be less than 250Ω at a place where electric danger is high and should be less than 500Ω at other places.)

▶ Electric wiring circuit diagram displays outline only.

▶ Do not connect a heater to an outdoor unit and do not install a duct which you arbitrarily remodeled. - Failure to do so may result in reduced capacity of an air conditioner, electric shock, and fire. ▶ Do not connect the grounding wire to that of gas pipe, water pipe, lightning rod, or telephone. - Gas pipe: If the gas leaks, explosion or ignition may occur. - Water pipe: If rigid vinyl pipe is used, grounding effect will not work. - Grounding wire and lightning rod of telephone: The electric potential of grounding wire may rise abnormally in the falling of a thunderbolt. The ELB for ground-fault protection only should be combined with MCCB or fuse equipped load breaker switch. In this case, you should use the one that has at least the same or more capacity as fuse capacity or the rated current of MCCB. Use the wires that comply with regulated specification and firmly connect to the terminal board. Then tighten it with the screws provided so that the terminal board cannot be moved by external force. (The connecting cable and the grounding terminal should be locally procured). When wiring, the connection cable shouldn't be too tight.

▶ Apply silicon at the end of CD pipe so that rainwater does not enter.

Conduit leading into an outdoor unit

Wiring work

Overall System Configuration

Connection of the power cable (1 phase 2 wires)

Distribution board, outdoor unit, indoor unit

Connection of the power cable (1 phase 2 wires using EEV kit)

Distribution board, outdoor unit, indoor unit

- You must install an earth leakage breaker.

• ELCB (Earth Leakage Circuit Breaker)
• MCCB (Molded Case Circuit Breaker)
• ELB (Earth Leakage fuse breaker)

• Manufacturers are not responsible for fire caused by not installing ELCB or MCCB. • Install the cabinet panel near the outdoor unit for service convenience and emergency operation switch off. - You must install a circuit breaker that can prevent excess current and shut off the electric leakage on the outdoor unit.

Specification for circuit breaker and power supply cord

▶ Power supply cord is not supplied with air conditioner.

▶ Select the power supply cord in accordance with relevant local and national regulations. ▶ Wire size must comply with the applicable local and national code. The appliance shall be provided with a certified power supply cord and interconnection cord complying with the national regulations of the countries in which the appliance is to be sold. ▶ Refer to the unit nameplate for Minimum Circuit Ampacity (MCA) and maximum Over-current Protection (MOP) rating.

1) Voltage tolerance is ± 10%. 2) Maximum allowable voltage between phases is 2%.

Tightening power terminal

Connect the cables to the terminal board using the compressed ring terminal. ▶ Use rated cables only.

▶ Connect the cables with driver and wrench that can apply the rated torque to the screws. ▶ Make sure that appropriate tightening torque is applied for cable connection. If the terminal is loose, arc heat may occur and cause fire and if the terminal is connected too firmly, terminal may get damaged.

Tightening torque
M4 12.0~	18.0 kgf·cm 1.2~1.8 N·m	Communication : F1, F2
M5 20.0~	30.0 kgf·cm 2.0~3.0 N·m	phase AC power : L1, L2

Wiring work

Selecting compressed ring terminal

Select a compressed ring terminal for the connecting power cable based on the nominal dimensions of the cable. Cover the compressed ring terminal and the connector part of the power cable, then connect it.

Nominal dimensions for cable [mm2(inch2)		4/6 (0.006/0.009)		10 (0.01) 16 (0.02) 25 (0.03) 35 (0.05) 50 (0.07) 70 (0.10)
Nominal dimensions for screw [mm(inch)]		4 (3/8) 8	(3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/11)
B	Standard dimension [mm(inch)]	9.5 (3/8)	15 (9/16)	15 (9/16)	16 (10/16)	12 (1/2)	16.5 (10/16)	16 (10/16)	22 (7/8)	22 (7/8) 24	(1)
	Allowance [mm(inch)] ±0.2 (±0.007)			±0.2 (±0.007)	±0.2 (±0.007)	±0.3 (±0.011) ±0.3 (±0.011)				±0.3 (±0.011)	±0.4 (±0.015)
D	Standard dimension [mm(inch)]	5.6 (1/4) 7.1 (1/4) 9 (3/8)			11.5 (7/16) 13.3 (1/2)					13.5 (1/2)	17.5 (1/2)
	Allowance [mm(inch)]	+0.3 (+0.011) -0.2 (-0.007)		+0.3 (+0.011) -0.2 (-0.007)	+0.3 (+0.011) -0.2 (-0.007)	+0.5 (+0.019) -0.2 (-0.007)		+0.5 (+0.019) -0.2 (-0.007)		+0.5 (+0.019) -0.2 (-0.007)	+0.5 (+0.019) -0.4 (-0.015)
d1	Standard dimension [mm(inch)]	3.4 (1/8)		4.5 (3/16)	5.8 (1/4)	7.7 (5/16)		9.4 (3/8)		11.4 (7/16)	13.3 (1/2)
	Allowance [mm(inch)] ±0.2 (±0.007)			±0.2 (±0.007)	±0.2 (±0.007)	±0.2 (±0.007) ±0.2 (±0.007)		±0.2 (±0.007)		±0.3 (±0.011)	±0.4 (±0.015)
E	Min.	6 (1/4)		7.9 (5/16)	9.5 (5/16)	11 (3/8) 12.5 (1/2)				17.5 (11/16)	18.5 (3/4)
F	Min.	5 (3/16)	9 (3/8)	9 (3/8)	13 (1/2)	15 (5/8)	13 (1/2)	13 (1/2)		14 (9/16)	20 (3/4)
L	Max.	20 (3/4)	28.5 (1-1/8)	30 (1-3/16)	33 (1-5/16)	34 (1-3/8)		38 (1-1/2)	43 (1-11/16)	50 (1.96)	51 (2.00)
d2	Standard dimension [mm(inch)]	4.3 (3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)		8.4 (1-3/16)		8.4 (1-3/16)	8.4 (1-3/16)
	Allowance [mm(inch)]	+0.2 (+0.007) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)		+0.4 (+0.015) 0 (0)		+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)
t	Min.	0.9 (0.03)		1.15 (0.04)	1.45 (0.05)	1.7 (0.06)		1.8 (0.07)		1.8 (0.07)	2.0 (0.078)

Installing grounding wire

Grounding must be done by a qualified installer for your safety. Use the grounding wire by referring to the specification of the electric cable of the outdoor unit.

Grounding the power cable

The standard of grounding may vary according to the rated voltage and installation place of the air conditioner.

Ground the power cable according to the following.

Installation placePower condition	High humidity Average humidity Low humidity
Voltage of lower than 150V		Perform the grounding work3. Note 1) Perform the grounding work 3 if possible for your safety. Note 2)
Voltage of higher than 150V	Must perform the grounding work 3. Note 1)(In case of installing circuit breaker as well)

1) Grounding work 3

- Grounding must be done by your installation specialist. - Check if the grounding resistance is lower than 100 Ω. When installing a circuit breaker that can cut the electric circuit within 0.5 second in case of a short circuit, the allowable grounding resistance should be 30 to 500 Ω.

2) Grounding at dry place

- The grounding resistance should be lower than 100 Ω. (It should not be higher than 250 Ω.) - Use the rated grounding wire by referring to the specification of the electric cable of the outdoor unit.

Performing the grounding work

Use the grounding wire by referring to the specification of the electric cable for the outdoor unit.

When using the terminal for grounding only When using grounding of the switch board

Grounding work

If the power distribution circuit does not have a grounding or the grounding does not comply with specifications, a ground rod must be installed.

The corresponding accessories are not supplied with the air conditioner.

1) Select a grounding rod that complies with the specifications given in the illustration.

2) Select a proper place for the grounding rod installation.

• In damp hard soil rather than loose sandy or gravel soil that has a higher grounding resistance.
• Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and underground cables.
• At least two meters away from lightning (as in a storm) conductor.

- The grounding wire for the telephone line cannot be used to ground the air conditioner.

3) Install a green/yellow coloured grounding wire :

• Refer to the 'Wiring work' for the specification of grounding wire.
• When the grounding wire is too short, extend the grounding wire but bind the connection part with insulation tape. (Do not bury the connection).
• Secure the grounding wire in position with staples.

- When the grounding rod is installed in a place where many people pass by, you must fix it firmly.

4) Carefully check the installation, by measuring the grounding resistance with a ground resistance tester.

- If the resistance is above required level, drive the grounding rod deeper into the ground or increase the number of grounding rods.

5) Connect the grounding wire to the electrical component box inside of the outdoor unit.

Basic segment display

Step Display content Display
At initial power input Checking segment display	SEG 1 SEG	2 SEG 3 SEG 4
	“8” “8” “8” “8”
While setting communication between indoor and outdoor unit (Addressing)	Number of connected indoor units	SEG 1 SEG	2 SEG 3 SEG 4
		“A”“d”		Number of communicated unitsRefer to "View Mode" for communication address
After communication setting (usual occasion)	MCU, Indoor unit address	SEG 1 SEG	2 SEG 3 SEG 4
		I/U:“A”MCU:“C”	I/U:“0”MCU:“1”	Reception address (in decimal number)

* I/U : Indoor unit, MCU : HR Changer & MCU

Setting outdoor unit option switch and key function

Setting outdoor unit option switches : A TYPE

Setting outdoor unit option switch and key function

Setting outdoor install option

Step Button	Display Description	Note
Quantity of indoor units
		nd	Setting required
Step1	Press (K1+K2) for 2 seconds	00	Ready to set
Step2	K2 x n times	X0	Tens digit (0 ~ 6)	Ex) 03:3 units10:10 units
	K4 x n times	0X	Ones digit (0 ~ 9)
	*K4 : Press for 2 seconds - automatic detection of indoor units' quantity
Step3	If it is heat recovery model, go to step 4.Otherwise, press K2 button for 2 seconds to save & exit.(system will be reset)

Installing and setting the option with tact switch and explanation of the functions

Setting the option

1) Press and hold K2 to enter the option setting. (Only available when the operation is stopped)

- If you enter the option setting, display will show the following. (If you have set the 'Emergency operation for compressor malfunction', 1 or 2 will be displayed on Seg 4.)

- Seg 1 and Seg 2 will display the number for selected option.

- Seg 3 and Seg 4 will display the number for set value of the selected option.

2) If you have entered option setting, you can shortly press the K1 switch to adjust the value of the Seg 1, Seg 2 and select the desired option.

Example)

3) If you have selected the desired option, you can briefly press the K2 switch to adjust the value of Seg 3 and Seg 4, and change the function for the selected option.

4) After selecting the function for the options, press and hold the K2 switch for 2 seconds. The edited value of the option will be saved when all segments blink and tracking mode begins.

- The edited option will not be saved if you do not end the option setting as explained in the above instruction.

* While setting the option, you may press and hold the K1 button to reset the value to the previous setting. * If you want to restore the setting to factory default, press and hold the K4 button while in the option setting mode. - If you press and hold the K4 button, the setting will be restored to factory default, but this does not mean that the restored setting is saved. Press and hold the K2 button. When the segments show that tracking mode is in progress, the setting will be saved.

Optional item Input unit SEG1 SEG2 SEG3 SEG4				Function of the option Remarks
Unused option	M	a	i	n	0	0	0	Unused option Unused option
Cooling capacity correction	Main	0	1	0	0	7-9		Targeted evaporation temperature [°C]. (When low temperature value is set, discharged air temperature of the indoor unit will decrease)
				0	1	5-7 (Factory default)
				0	2	9-11
				0	3	10-12
				0	4	11-13
				0	5	12-14
				0	6	13-15
Capacity correction for heating	Main	0	2	0	0	3.0 (Factory default)		Targeted high pressure [MPa]. (When low pressure value is set, discharged air temperature of the indoor unit will decrease)
				0	1	2.5
				0	2	2.6
				0	3	2.7
				0	4	2.8
				0	5	2.9
				0	6	3.1
				0	7	3.2
				0	8	3.3
Current restriction rate	Main	0	3	0	0	100% (Factory default)		When restriction option is set, cooling and heating performance may decrease.
				0	1	95 %
				0	2	90 %
				0	3	85 %
				0	4	80 %
				0	5	75 %
				0	6	70 %
				0	7	65 %
				0	8	60 %
				0	9	55 %
				1	0	50 %
				1	1	No restriction
Oil collection interval	Main	0	4	0	0	Factory default
				0	1	Shorten the interval by 1/2
Temperature to trigger defrost operation	Main	0	5	0	0	Factory default
				0	1	Apply setting when the product is being installed in humid area such as near river or lake		The defrost option shortens the starting time of the defrost operation

Setting outdoor unit option switch and key function

Optional item	Input unit SEG1	SEG2	SEG3	SEG4	Function of the option Remarks
Fan speed correction for outdoor unit	Main 06				00 Factory default
					01 Increase fan speed			Increase the outdoor unit's fan speed to maximum value
Silent mode for night-time	Main 07				00 Disabled (Factory default)
					01 LEVEL 1 / Auto			Enables the silent mode for night-time in cooling mode. (It operates automatically depending on the temperature.) However, if the external contact interface module (MIM-B14) is used, entering the silent mode is available with contact signal in cooling and heating mode.
					02 LEVEL 2 / Auto
					03 LEVEL 3 / Auto
					04 LEVEL 1/ External contact
					05 LEVEL 2/ External contact
					06 LEVEL 3/ External contact
High-head condition setting	Main 08				00 Disabled (Factory default)
					0	1	Level 1 of height difference type 1 (indoor unit is lower than outdoor unit)	When outdoor unit is located 40~80m above the indoor unit
					02 Not applicable
					0	3	Height difference type 2 (outdoor unit is lower than indoor unit)	When indoor unit is over 30m above the outdoor unit
Long-pipng condition setting (Setting is unnecessary if high-head condition is set)	Main 09				00 Disabled (Factory Default)
					01		LEVEL 1	When equivalent length of farthest indoor unit from the outdoor unit is over 100m
					02 Not applicable
Energy saving setting	Main 10				00 Disabled (Factory default)
					01	Energy saving mode		Energy saving mode triggers when the room temperature reaches desired temperature while operating in heating mode.
					02		Rapid cooling	This function increases cooling speed.
Unused option	Main	1	1		0	0	Unused option	Unused option by this model
Unused option	Main	1	2		0	0	Unused option	Unused option by this model
Channel address	Main 1 3			A	U	Automatic setting (factory default)		Address for classifying the product from upper level controller(DMS,S-NET 3,etc.)
				0 - 15		Manual setting for channel 0 - 15
Snow accumulation prevention control	Main 1 4			0 0 Enabled				During snow accumulation , the fan may spin even when the unit is not in operation
				0	1	Disabled (Factory default)
Unused option	M	a	i	n	1	5	0 0	Unused option Unused optio
Unused option	M	a	i	n	1	6	0 0	Unused option Unused optio
Unused option	M	a	i	n	1	7	0 0	Unused option Unused optio
Max. capacity restriction	Main 1 8			0 0 Enabled (Factory default)				Restrict excessive capacity increase when operating indoor units with small capacity
				0 1 Disabled
Gas leak pump down	Main 1 9			0	0	Disabled (Factory default)		If the gas leak occurred it should be entered in the pump down operation.
				0 1 Enabled
Unused option	M	a	i	n	2	0	0 0	Unused option Unused optio
Unused option	M	a	i	n	2	1	0 0	Unused option Unused optio
Emergency operation for indoor unit communication error	Main 2 2			0 0 Disabled (Factory default)				When set, emergency operation is possible even if an indoor communication error occurs.
				0	1	Indoor high humidity condition (operating for up to 12hours)
				0	2	Indoor low humidity condition (operating for up to 24hours)
Base Heater	Main 2 3			0 0 Disabled
				0 1 Enabled

* There is a risk of water leakage during emergency operation for indoor unit communication error. Please be careful when using it.

Setting outdoor unit option switch and key function

- After installing the product, be sure to perform leak tests on the piping connections. After pumping down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the connected pipes.

- Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too high a pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.

Setting key operation and checking the view mode with tact switch

K1 Control KEY operation Display on segment
Press and hold 1 time Auto trial operation "K" "K" "BLANK" "BLANK"
K1(Number of press) KEY operation Display on segment
1 time Refrigerant charging in Heating mode (Note 1)		"K" "1" "BLANK" "BLANK"
2 times Trial operation in Heating mode (Note 1)		"K" "2" "BLANK" "BLANK"
3 times Pump out in Heating mode (Note 1)		"K" "3" "BLANK" "1"
4 times Vacuuming "K" "4" "BLANK" "1"
5 times End Key operation		—
K2(Number of press) KEY operation Display on segment
1 time Refrigerant charging in Cooling mode "K" "5" "BLANK" "BLANK"
2 times Trial operation in Cooling mode		"K" "6" "BLANK" "BLANK"
3 times Pump down in Cooling mode "K" "7" "BLANK" "BLANK"
4 times Automatic setting of operation mode (Cooling/Heating) for trial operation		"K" "8" "BLANK" "BLANK"
5 times Checking the amount of refrigerant		"K""9""X""X"(Display of last two digits may differ depending on the progress)
6 times Discharge mode of DC link voltage		"K" "A" "BLANK" "BLANK"
7 times Forced defrost operation "K" "B" "BLANK" "BLANK"
8 times Forced oil collection "K" "C" "BLANK" "BLANK"
9 times Inverter compressor check		"K" "D" "BLANK" "BLANK"
10 times H/R: Auto pipe pairingH/P: Unused		"K""H""X""X"(Display of last two digits may differ depending on the progress)
11 times End Key operation		—

* Even when the outdoor unit power is off, it is dangerous to come in contact with the inverter PCB since it is charged with high DC voltage. * When replacing/repairing the PCB, cut off the power and wait until the DC voltage is discharged before replacing/repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.) * When there was an error, 'Discharge mode of DC link voltage' may not have been effective. Especially if error E464 has occurred, the power element might be damaged by fire, and therefore, do not use the 'Discharge mode of DC link voltage'. * During "Discharge mode of DC link voltage", the voltage of INV will be displayed.

K3(Number of press) KEY operation Display on segment
1 time Initialize (Reset) setting Same as initial state

K4(Number of press)	KEY operation	Display on segment
		SEG 1 SEG2, 3, 4
1 time Outdoor unit model 1		5HP (AM048*XM*) → 0, 0, 5
2 times Order frequency of compressor 2		120 Hz → 1,2,0
3 times High pressure 3		1.52 MPa → 1, 5, 2
4 times Low pressure 4		0.43 MPa → 0, 4, 3
5 times Discharge temperature of compressor 5		188.6 °F(87 °C) → 0, 8, 7
6 times	IPM temperature of compressor	6	188.6 °F(87 °C) → 0, 8, 7
7 times	CT sensor value of compressor	7	2 A → 0, 2, 0
8 times	Suction temperature	8	-43.6 °F(-42 °C) → -, 4, 2
9 times	COND OUT temperature	9	-43.6 °F(-42 °C) → -, 4, 2
10 times	Liquid pipe temperature	A	-43.6 °F(-42 °C) → -, 4, 2
11 times	TOP temperature of compressor	B	188.6 °F(87 °C) → 0, 8, 7
12 times	Outdoor temperature C		-43.6 °F(-42 °C) → -, 4, 2
13 times	EVI inlet temperature	D	-43.6 °F(-42 °C) → -, 4, 2
14 times	EVI outlet temperature	E	-43.6 °F(-42 °C) → -, 4, 2
15 times	Main EEV step F		2000 steps → 2, 0, 0
16 times	EVI EEV step	G	300 steps → 3, 0, 0
17 times	Fan step	H	13 steps → 0, 1, 3
18 times	Current frequency of compressor	I	120 Hz → 1,2,0
19 times	Master indoor unit address (Master indoor unit can be selected by wired remote-controller)	J	Master indoor unit not selected → BLANK, N, DIf indoor unit No.1 is selected as the master unit →0, 0, 1
20 times	MCU Bypass EEV Step	K	300 steps → 3, 0, 0

K4 (Press and hold for 2 seconds to enter the setting) → K4 press (Number of press)	Displayed content	Display on segment
		Page 1	Page 2
1 time	Main version	MAIN	Ver. (ex) 1412)
2 times	Inverter version	INV1	Ver. (ex) 1412)
3 times	EEP version	EEP	Ver. (ex) 1412)
4 times	Assigned address of the units	AUTO	SEG 1,2	SEG 3,4
			Indoor unit: "A", "0"HR Changer/MCU Unit:"C","1"	Address (ex) 07)
5 times	Manually assigned address of the units	MANU	SEG 1,2	SEG 3,4
			Indoor unit: "A", "0"	Address (ex) 15)

Setting outdoor unit option switch and key function

5) After selecting the function for the options, press and hold the K2 switch for 2 seconds. The edited value of the option will be saved when all segments blink and tracking mode begins.

- The edited option will not be saved if you do not end the option setting as explained in the above instruction.

* While you are setting the option, you may press and hold the K1 button to reset the value to the previous setting. * If you want to restore the setting to factory default, press and hold the K4 button while you are in the option setting mode.

- If you press and hold the K4 button, the setting will be restored to factory default, but it doesn't mean that the restored setting is saved. Press and hold the K2 button. When the segments show that tracking mode is in progress, the setting will be saved.

Option Item Input Unit SEG1 SEG2 SEG3 SEG4				Function of the option Remarks
Channel address Main 0 0				A	U	Automatic setting (Factory default)	Address for classifying the product from upper level 0 ~ 15 controller (DMS, S-Net 3, etc.)
				0 ~ 15		Manual setting for channel (0~15)

Pump Down

• After installing the product, be sure to perform leak tests on the piping connections. After pumping down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the connected pipes.
• Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too high a pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.

The object of pump down

▶ You can reduce as much refrigerant leakage as possible during product movement or repair by collecting the refrigerant to the outdoor unit.

Caution for pump down procedure

The amount of refrigerant that can be put into an outdoor unit is limited due to the slim shape of the outdoor unit. Before performing pump down, most of the refrigerant should be put into an empty container at first. The maximum amount of refrigerant that can be put into the outdoor unit is 5kg (176.4 oz). When the amount of system refrigerant exceeds the amount of maximum receptive capacity, compressor trip or damage by fire might be caused.

Pump down procedure

▶ Before performing pump down, collect the refrigerant into the empty container. ▶ Turn off the manifold gage. ▶ Turn off the service valve of liquid pipe side. ▶ Press K2 button on the outdoor unit PCB three times. ('F7' is displayed on outdoor PCB LED.) When the compressor starts operating, observe low pressure using manifold gage. When the low pressure goes below 0 MPa (gauge pressure), turn off the service valve at gas side and finish the pump down operation. (To finish pump down operation, press K2 button one more time or press K3 button one time to be initiated.)

- When putting refrigerant into the refrigerant container, you must use the exclusive container that can be recharged. When remodeling normal refrigerant container illegally, explosion might occur.

How to put the refrigerant into the refrigerant container before pump down operation

* When the amount of refrigerant charged in the system exceeds maximum receptive capacity, collect the refrigerant into the refrigerant container at first and then perform the pump down. ▶ Prepare the exclusive refrigerant container that can be recharged, scale, and manifold gage that can be recharged. ▶ Check the current amount of refrigerant within the system. ▶ After connecting the refrigerant container to an outdoor unit, operate 50% of all indoor units as cooling mode. ▶ Check the pressure of high pressure side for manifold gage after 10 minutes from cooling operation. When the pressure of high pressure side is above 2.9 MPa (gauge pressure), 420.61 psig decrease the number of operating indoor unit and make the pressure below 2.9 MPa (gauge pressure), 420.61 psig. ▶ After checking that the pressure of high pressure side went below 2.9 MPa (gauge pressure), 420.61 psig, open the manifold gage side valve(2) that is connected to the liquid pipe and refrigerant container valve. Then run the refrigerant from liquid pipe to refrigerant container. ▶ Check whether the proper amount of refrigerant are put into the container using a scale, turn off the valve and remove the manifold gage. The amount of refrigerant that can be put into the refrigerant container should be about 50% of all refrigerant of the whole system. ▶ Do not collect too much refrigerant in one refrigerant container.

Checking lists after finishing installation

Before supplying power, measure the power terminal (L, N) and outdoor unit grounding using insulation-resistance tester.

- The measured value should be above 30MΩ.

CAUTION

- You must not measure the communication terminal since the communication circuit may get damaged.

- Check the short circuit using a circuit tester.

Installation	Outdoor unit	Have you secured air discharge profile at the bottom of service cover?Have you checked the external surface and the inside of the outdoor unit?Is there any possibility of short circuit due to the heat of an outdoor unit?Is the place well-ventilated and ensures space for service?Is the outdoor unit fixed securely?
	Indoor unit	Have you checked the external surface and the inside of the indoor unit?Is the place well-ventilated and has enough space been allowed for service?Have you checked if the center of the indoor unit is ensured and it is installed horizontally?
Refrigerant pipe work		Have you selected correct pipes?Are the liquid and gas valve open?Is the total number of connecting indoor units within the allowable range?Are the length and the height difference between the refrigerant pipes within the allowable range?Is the refrigerant Y-joint properly installed?Has the connection of liquid and gas pipes been correctly performed?Have you chosen correct insulation for pipes and have you insulated them correctly?Is the pipe or connection part properly insulated?Is the quantity of the additional refrigerant correctly weighed in? (You must record the amount of additional refrigerant charging on the service record paper placed outside the outdoor unit.)
Installing the drain pipe		Have you checked whether the drain pipes of the indoor unit and outdoor unit are connected together?Have you completed the drain test?Is the drain pipe properly insulated?
Wiring work		Are the power cable and communication cable tightened firmly on the terminal board within the range of rated tightening torque?Have you performed the earthing work 3 to the outdoor unit?Is 2-core cable used for the communication cable?Is the length of the wire is in the limited range?Is the wiring route correct?
Setting ADDRESS		Are the ADDRESSES of the indoor and outdoor units properly set?Are the ADDRESSES of the remote controller properly set?(When using multiple remote controllers)
Option		Have you checked whether the vibration-resistance frame is correctly installed if there is a possible vibration of the outdoor unit.

Inspection and check operation

Precautions before check operation

• When the outdoor temperature is low, turn on the main power 3 hours before beginning the operation.
• If you start the operation immediately after turning on the main power, it may cause serious damage to the part within the product.
• Do not touch the refrigerant pipe during or right after the operation.
• Refrigerant pipe may be hot or cold during or right after the operation depending on the status of the refrigerant which flows through the refrigerant pipe, compressor and other parts of the refrigerant cycle. If you touch the refrigerant during or right after the operation, you may get burns or frostbite.
• Do not operate the product with its panel or protection nets off.
• There is risk of personal injury from the parts that rotates, heated or with the high voltage.
• Do not turn off the main power immediately after stopping the operation.
• Wait for at least 5 minutes before turning off the main power. If not, water leakage or other problems may occur.
• Connect all the indoor units and the power supply for the outdoor unit and run auto or manual address setting. Run auto or manual address setting after changing the indoor unit PCB.

Inspection before check operation

1) Check the power cable and communication cable of the indoor and outdoor unit. 2) Supply power to the outdoor unit 3 hours before check operation to pre-heat the crank case heater. 3) Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase. - 230V between wires (R-S, S-T, T-R) 4) When the power is supplied, outdoor unit will execute tracking to check the indoor unit connection and other options. 5) Write down the installation report on the service history report paper attached on the front part of the control box.

• Supply power to the outdoor unit 3 hours before check operation to pre-heat the crank case heater.

6) Guaranteed range of check operation

For correct judgment, you must perform check operation in below indoor/outdoor temperature condition.

- Check operation selects and operates cooling/heating mode automatically.

• In the temperature range marked with slashed pattern, system protection control may trigger during operation. (It may be hard to judge the check operation correctly due to protection control operation.)
• When the temperature is outside of guaranteed range, accuracy of judgment on check operation may decrease near border line area.

Inspection and check operation

Check operation

1) Use KEY MODE to run check operation.

• When the check operation is not completed, UP (unprepared) will appear on the LED after the communication check and restrict compressor from operating. (UP Mode will be cleared automatically when check operation is completed.)
• Check operation may proceed from 30 minutes up to a maximum of 50 minutes, depending on the operation status.
• During check operation, noise may be generated due to valve inspection. (Check the product if abnormal noise occurs continuously.)

2) If an error occurs during check operation, check the error code and take appropriate measures.

- Refer to the service manual if you need inspection or when other errors occur.

3) When check operation ends, use S-NET pro or S-CHECKER to issue a result report.

• Refer to the service manual for further actions if you have any items with "inspection required" sign on the result report.
• After taking appropriate measures for the items with "inspection needed" sign, run the check operation again.

4) Check the following items by running (cooling/heating) trial operation.

• Check if cooling/heating operation performs normally.
• Individual indoor unit control: Check for air flow direction and fan speed.
• Check for abnormal operation noise from the indoor and outdoor unit.
• Check for proper draining from the indoor unit during cooling operation.
• Use S-NET pro to check the detailed operation status.

5) Explain to the user how to use the air conditioner according to the user's manual. 6) Hand over the installation manual to the customer so they can keep it with them.

Automatic refrigerant amount detection function (Checking the amount of refrigerant)

Automatic refrigerant amount detection function (Checking the amount of refrigerant)

This function detects the amount of refrigerant in the system through a refrigerant amount detection operation.

• If the operation cycle is not stable, the refrigerant amount detection operation may end.
• Accuracy of the result may decrease if the product was not operated for a long period of time before the refrigerant amount detection operation. Use the refrigerant amount detection operation function after operating the product in cooling mode for at least 30 minutes.
• The product may trigger protection operation depending on the installation environment. In this case, the result of refrigerant amount detection may not be accurate.
• If the temperatures are outside the guaranteed range, accurate results cannot be obtained.

- Indoor: 20 \~ 30 °C (68\~86°F)

- Outdoor: 5 \~ 43 °C (41\~109.4°F)

Actions to take after the detection result

• Excessive amount of refrigerant
• Discharge 5% of the detected amount of refrigerant and restart the refrigerant amount detection operation.
• Insufficient amount of refrigerant
• Add 5% of the detected amount of refrigerant and restart the refrigerant amount detection operation.
• Judgment not available
• Check if the refrigerant amount detection operation was executed within the guaranteed temperature range. Execute a trial operation to check if there are any other problems with the system.

Trial operation

▶ Check the power supply between the outdoor unit and the cabinet panel.

- 1 phase power supply : L, N

▶ Check the indoor unit.

- Check whether you have connected the power and communication cables correctly.

(The communication cables between an indoor unit and outdoor unit are F1, F2.)

- Check the thermistor sensor, drain pump/hose, and display are connected correctly.

▶ Check with Key mode or S-Net Pro.

- At first, operate all the indoor units with Key mode and operate the indoor units individually with S-Net Pro.

- In the beginning of operation, check the compressor operation sound. If there is a boom sound, stop the trial operation.

▶ Check the operation status of indoor and outdoor unit.

- Check whether the cooling operation is done correctly.

- Check the individual indoor unit control, wind velocity, and wind flow direction.

- Check whether you can hear abnormal sound from indoor unit and outdoor unit.

- Check whether the drainage is done correctly in cooling.

- Check S-net Pro for detailed operation.

Explain to the user the usage of the air conditioner by referring to the user's manual.

- Turn on the outdoor unit 3 hours before the test operation to preheat the compressor.

- If the compressor is not preheated, 'CH' may appear on the outdoor unit PCB depending on the outdoor temperature.

- If the check operation is not completed, 'UP' may appear on the outdoor unit PCB.

Writing and keeping installation checking card

▶ Installation checking card is enclosed with the installation manual. - Installer should fill out the front side of the card meticulously. - Write basic information such as date of installation, name of an installer, contact information, supervision company etc. - Write additional information such as the name of outdoor unit models, unusual, calculation of the additional amount of refrigerant etc. - Write indoor unit related information such as indoor unit installation location, indoor unit model name etc. ▶ Keep the installation checking card in a designated place and do not lose it.

Memo

SAMSUNG