MCU-S6NEK2N - Splitter SAMSUNG - Free user manual and instructions

Product Type	Signal Distributor / Splitter
Brand	Samsung
Model	MCU-S6NEK2N
Inputs	1x HDMI
Outputs	2x HDMI
Video Resolution	Up to 4K @ 60Hz
Audio Support	Dolby TrueHD, DTS-HD Master Audio
Dimensions (L x W x H)	100 x 50 x 20 mm
Weight	120 g
Power Supply	DC 5V 1A (via USB)
Power Consumption	2.5W
Material	Plastic and Metal
Color	Black
Mounting	Desktop
LED Indicators	Power and Signal
Remote Control	Not included
Operating Temperature	0°C to 45°C
Storage Temperature	-20°C to 60°C
Compliance	CE, FCC, RoHS
Warranty	1 year
Package Contents	Splitter, USB power cable, user manual

Frequently Asked Questions - MCU-S6NEK2N SAMSUNG

How do I connect the Samsung MCU-S6NEK2N splitter?

Connect your source device (e.g., Blu-ray player) to the input port using an HDMI cable. Then connect up to two displays to the output ports. Finally, power the splitter via the USB cable.

What devices are compatible with this splitter?

The splitter is compatible with any HDMI-enabled device such as game consoles, streaming boxes, PCs, and cable/satellite receivers. It works with both 4K and 1080p sources.

Does the MCU-S6NEK2N support 4K resolution?

Yes, it supports 4K resolution up to 60Hz with HDR10 and Dolby Vision passthrough, ensuring high-quality video output to both displays.

Why is there no signal on one of the outputs?

Ensure all HDMI cables are securely connected and the source device is powered on. Try swapping cables or inputs. If the issue persists, check that the display supports the output resolution and is set to the correct input.

Can I use this splitter with a 1080p TV?

Yes, the splitter is backward compatible with 1080p and lower resolutions. It will automatically adjust to the highest supported resolution of each connected display.

How do I power the splitter?

Use the included USB power cable to connect the splitter to a standard USB port (5V, 1A) on your TV, source device, or a USB wall charger. The splitter will power on immediately.

Does the splitter support HDR?

Yes, it supports HDR10 and Dolby Vision passthrough, maintaining the high dynamic range for compatible content on both displays.

What is the maximum HDMI cable length recommended?

For stable 4K signal, use high-speed HDMI cables up to 3 meters (10 feet). For longer distances, consider active or fiber optic cables.

Is the splitter plug and play?

Yes, the splitter is plug and play. No drivers or software installation is required. Simply connect the cables and power on.

What should I do if the power LED is not lit?

Check that the USB power cable is properly connected to both the splitter and a working power source. Try a different USB port or power adapter. If still off, the unit may be defective.

USER MANUAL MCU-S6NEK2N SAMSUNG

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

Contents

Safety precautions....3

Preparing the installation....7

Space requirements....10

Refrigerant piping....17

Wiring 20

MCU Installation Checklist 31

Correct Disposal of This Product (Waste Electrical & Electronic Equipment)

(Applicable in countries with separate collection systems)

This marking on the product, accessories or literature indicates that the product and its electronic accessories (e.g. charger, headset, USB cable) should not be disposed of with other household waste at the end of their working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate these items from other types of waste and recycle them responsibly to promote the sustainable reuse of material resources.

Household users should contact either the retailer where they purchased this product, or their local government office, for details of where and how they can take these items for environmentally safe recycling.

Business users should contact their supplier and check the terms and conditions of the purchase contract. This product and its electronic accessories should not be mixed with other commercial wastes for disposal.

(For India only)

For more information on safe disposal and recycling, visit our website www.samsung.com/in/support or contact our

Helpline numbers - 1800 40 SAMSUNG (1800 40 7267864)

1800 5 SAMSUNG (1800 5 7267864).

For correct disposal of this product, please visit http://www.samsung.com/weee.pdf

The safety information and precautions below must be kept for the safety of users and installers.

Before installing an air conditioner, please read this manual thoroughly to ensure that you know how to safely and efficiently install a new appliance.

* This product uses R-410A refrigerant.

• When using R-410A, moisture or foreign substances may affect the capacity and reliability of the product. Safety precautions must be taken when installing the refrigerant pipe.
• The designing pressure of the system is 4.1MPa. Select appropriate material and thickness according to the regulations. – R-410A is a quasi-azeotrope of two refrigerants. Make sure to charge with liquid phase when filling refrigerant. If you charge gaseous refrigerant, it may affect the capacity and reliability of the product as a result of change formation of the refrigerant.

* Connect the indoor units for R-410A refrigerant. Check whether the indoor units can be connected with the product's catalogue. (When incorrect indoor units are connected, they cannot operate normally.)

* After installation and trial operation, explain to the customer how to use the air conditioner and give the installation manual to the user. ※The manufacturer is not responsible for accidents due to incorrect installation. Any claims caused by failing to keep the safety precautions are installer's responsibility. (The installer is responsible for the service cost.) * 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.

※ If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

WARNING	In case of not following the safety precautions, the service agent or the user may get the risk of serious wound or death.
CAUTION	In case of not following the safety precautions, the service agent or the user may get the risk of injury or loss of property.

FOR INSTALLATION

WARNING

Installation must be done by the installer or its service agent.

Installation by an unqualified person may cause water leakage, electric shock, fire, and so on.

Install the unit correctly according to the installation manual.

An incorrect installation may cause water leakage, electric shock, or fire.

When installing the unit in a small place, take measures to keep the refrigerant concentration from exceeding allowable safety limits in the event of a refrigerant leak.

Excessive refrigerant concentration can lead to suffocation.

If any gas or impurities other than R-410A refrigerant get into the refrigerant pipe, serious problems may occur and this may cause injury.

When installing the unit, only use the components and tools specified for the installation.

Using uncertified components and tools may cause the unit to fall, water leakage, electric shock, and fire. (Never use components and pipes for R-22 refrigerant.)

Install the unit safely on a place that can support its weight.

If the place cannot support its weight, the unit may fall down and cause injury.

Check the safety precautions below before installing or fixing the unit.

Before welding the unit, remove all hazardous materials around the unit that may cause an explosion or fire.

When refrigerant is in the product or the pipe before welding the unit, remove the refrigerant.

If you weld the unit when there is refrigerant inside, the increased pressure of refrigerant may explode or break the leaking spot, causing serious injuries.

When welding the unit, please use nitrogen gas to prevent oxide from generating in the pipe.

Make sure to cut off all the power supply before installing, fixing, and cleaning the unit.

When the electric wire is damaged, you must exchange it by the manufacturer or its service agent, or a person who has the equivalent qualification.

When turning on the power, make sure to connect the power supply to the circuit breaker designated for indoor units. (ELCB, ELB, MCCB)

If you do not install the circuit breaker for MCU (ELCB, ELB, MCCB), excessive current or failure to block the power supply may cause electric shock or fire.

Safety precautions

FOR INSTALLATION

WARNING

Make sure to connect wires thoroughly and fix them firmly so that no outer pressure of the wires would put on the terminal block.

▶ If the terminal is loose, it may generate heat and cause a fire.

Supplied power should be more or less than 2% of the rated power.

If the power is supplied unevenly, the life span of the storage battery shortens. If the supplied power is more than 4% of the rated power, the unit terminates and indicates errors to protect it.

Make sure the interior power supply shouldn't be over the maximum voltage or under the minimum voltage.

▶ Otherwise, it could result in malfunction of the unit due to damaged electrical components or decreased function of components.

Only use copper wire as the power cable and all wiring, components, and materials should comply with the applicable local and national codes.

Make sure that all wiring is properly installed.

Otherwise, the unit can overheat and cause a fire.

Never use the pipe and flare parts for R-22 refrigerant.

In case of a refrigerant gas leakage during installation, please ventilate the area.

If refrigerant gas combines with inflammable materials, toxic gases can be generated.

The electric work must be done by service agent or qualified persons according to national wiring regulations and use only rated cable.

Voltage drop, shortage of power supply, improper electric work and using unapproved wires can cause an electric shock or a fire.

FOR INSTALLATION

CAUTION

Make sure to earth.

Do not connect the earth wire to the gas pipe, lightning rod or telephone wire.

If earthing is incomplete, electric shock or fire may occur.

Make sure that the condensed water from the drain hose runs out properly based on this installation manual and insulate the drain pipe so that frost does not generate.

If the draining work is done incompletely, property damage may occur due to a leakage.

Install the power cable and communication cable of MCU at least 1m away from the electric appliances and at least 2m away from the lightning rod.

However, you may hear a noise 1 meter away from the unit depending on the condition of the electric wave.

Install MCU away from lighting apparatus using the ballast.

If you use the wireless remote control, it may not operate normally.

Do not install the unit in the following places:

The place packed with mineral oil and the place where there are lots of moisture, or arsenic acid:

The resin parts may burn and cause the fall of the components or a refrigerant leakage.

The place where corrosive gas such as sulfurous acid gas generates from the vent pipe or air outlet:

The copper pipe or connection pipe may corrode and refrigerant may leak.

The place where there is a machine that generates electromagnetic waves:

The unit may not operate normally due to malfunction in the control system.

The place where there is a possibility of combustible gas leakage, and where inflammable materials like thinner or gasoline is handled. The place where a carbon fiber or inflammable dust is floating in the air:

If the gas leaks and stays around the main valve, it may result in a fire.

The places where have a possibility of the MCU corrosion like a spa and a shore.

When there is a possibility that the place in which MCU is installed could be the shelter of small animals, take proper measures to prevent this situation in advance.

If small animals contact the unit, this may result in malfunction of the unit or cause a fire and smoke. Please remind users of cleaning the place around MCU.

* Any claims caused by failing to keep the safety precautions are installer's responsibility.

(The installer is responsible for the service cost.)

Preparing the installation

Accessories

Please check if items below are included in installation accessories.

Name	Insulation (for pipe)	Insulation (for base)	Installation manual	Pattern sheet	Cable tie	Pipe socket
						MCU-S1*MCU-S2*	MCU-S4*MCU-S6*MCU-S8*MCU-S12*
Shape						-

* Soundproof and soundproofing materials

Name MXJ-YM1509M
Shape

Selecting the refrigerant pipe for installation

The design pressure of MCU for R-410A is about 4.1 MPa (594.6psi). For safe use of the product, please refer to the table below in selecting the installation pipe.

Outer diameter Minimum thickness				Temper grade
mm inch mm inch
6.35 1/4 0.70 0.028				Annealed
9.52 3/8 0.70 0.028
12.70 1/2 0.80 0.031
15.88 5/8 1.00 0.039
19.05 3/4 0.90 0.035				Drawn
22.22 7/8 0.90 0.035
25.40 1 1.00 0.039
28.58 1 1/8 1.10 0.043
31.75 1 1/4 1.10 0.043
34.92 1 3/8 1.21 0.048
38.10 1 1/2 1.35 0.053
41.28 1 5/8 1.43 0.056
44.45 1 3/4 1.60 0.063
50.80 2 2.00 0.079
53.98 2 1/8 2.10 0.083

CAUTION

- For pipes larger than ∅ 19.05mm(3/4"), drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be used. If an annealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and cause personal injury.

CAUTION

Preparing the installation

MCU indoor/outdoor unit compatible table

Before installing MCU, refer to the compatible table below and find the model before installation.

MCU Kit	Model Description
	MCU-S6NEK2N below 61.6 kW (216MBH)
	MCU-S4NEK3N below 61.6 kW (216MBH)
	MCU-S2NEK2N below 32 kW (108MBH)
	MCU-S1NEK1N below 16 kW (54MBH)
	MCU-S12NEK1N 85.0 kW (290MBH)
	MCU-S8NEK1N 85.0 kW (290MBH)

[Unit : mm(inch)]

Space requirements

1. Refrigerant noise can be generated during MCU operation. Do not install the unit in spaces that require silence, such as bedrooms, libraries, hospitals, offices, etc.
2. Do not install the MCU in the ceiling of living spaces. Noise generated from the MCU may disrupt occupant comfort.

1. It is normally recommended to install the MCU in a hallway, but a bulkhead should be installed to minimize the noise from being transferred to the living area. (Refer to the figure below)

* Soundproof and soundproofing materials

The place where the MCU is installed and the interior walls should have a high soundproof ability. (Bricks, concrete, cement) The ceiling where the MCU is installed should be coated with quality textile that has a good soundproof function. ▶ Minimize the size of the hole between the walls and the pipe connection. After installation, block the gap to prevent noise from leaking.

1. Secure over 0.25 m (0.82 ft) of space when the MCU is being fixed to the concrete of the ceiling.
2. The MCU may generate noise, so don't install it too close to the ceiling textile.
3. Each pipe hanger should be placed at 1.5 m (4.92 ft) intervals to support its weight firmly. If the pipe or the hanger isn't fixed firmly, the unit may fall and cause property damage or loss of life.
4. When the 'Low temperature cooling range expansion' option is set for constant cooling operation throughout the year, noise of the MCU may get louder during wintertime. Therefore, the above installation requirements must be followed.
5. Select a place where the structure can support the weight of the MCU and indoor units that also have strong vibration resistance without any slope.

If the structure is not strong enough, the MCU may fall down and cause injury.

*Height (mm)

1. Select an installation location with enough space for service and repair.

Leave enough space between adjacent walls and structures. Refer to the examples below.

Space requirements

1. MCU specification

Model MCU-S12NEK1N	MCU-S8NEK1N	MCU-S6NEK2N
Exterior of MCU
Number of connectable indoor units at one port	Up to 8 units Up to 8 units		its Up to 8 units
Maximum number of indoor units (Total)	64 64 32
The maximum capacity of the connectable indoor units at one port	16 kW(54MBH)		16 kW(54MBH)	16 kW(54MBH)
The maximum capacity of the connectable indoor units at one port (with Y-JOINT)	32.0 kW(108 MBH)		32.0 kW(108 MBH)	32.0 kw(108 MBH)
The maximum capacity of the connectable indoor units	85.0 kW(290MBH)		85.0 kW(290MBH)	61.6 kW(216MBH)
Internal EEV	Not includedCannot connect indoor unit without internal EEV

Model MCU-S4NEK3N MCU-S2NEK2N MCU-S1NEK1N
Exterior of MCU
Number of connectable indoor units at one port	Up to 8 units Up to 8 units Up to 8 units
Maximum number of indoor units (Total)	32 16 8
The maximum capacity of the connectable indoor units at one port	16 kW(54MBH)	16 kW(54MBH)	16 kW(54MBH)
The maximum capacity of the connectable indoor units at one port (with Y-JOINT)	32.0 kw(108 MBH)	32.0 kw(108 MBH)	-
The maximum capacity of the connectable indoor units	61.6 kW(216MBH)	32.0 kW(108MBH)	16 kW(54MBH)
Internal EEV	Not includedCannot connect indoor unit without internal EEV

• If the sum of the connected indoor unit capacity connected to the MCU is greater than 67.2kW (228 MBH), performance may vary depending on operating conditions.
• The incoming pipe diameters supplying refrigerant to the MCU are determined based on the sum of the connected indoor units. If these pipe diameters are different than the MCU pipe diameters, use the provided reducers to connect to the MCU. If the provided reducers are not the correct size, field supplied reducers must be used.

Model MCU-S12NEK1N MCU-S8NEK1N MCU-S6NEK2N
Example installing (Each port connection)
	MCU-S4NEK3N MCU-S2NEK2N MCU-S1NEK1N
Example installing (MCU series connection)
Installing indoor units	Indoor units under 16.0 kW (54 kBtu/h): Y-connector is not requiredIndoor units 16.0 kW ~ 32.0 kW (54 ~ 108 kBtu/h): Y-connectors at the gas and liquid lines are requiredIf continuous cooling operation is required when outside temperature is below -5 °C (23°F), set outdoor option setting "Expand operational temperature range for cooling operation (HR only)", and use Y-connector on the liquid and gas pipes for indoor units 5.0 ~ 16 kW (18 ~ 54 kBtu/h).When MCUs are connected in series, the maximum capacity of all indoor units in MCU series connection is the larger value of MCU which are connected in series.Example: MCU-S12NEK1N + MCU-S6NEK2N → 85.0 kW (290MBH)
Using Y-connector	[MCU-S6*, MCU-S4*, MCU-S2*, MCU-S1*]When twinning 2 adjacent ports, Y-connectors can only be connected to the port combinations noted below.Allowed Y-connector port combinations: A + B, C + D, E + F portsY-connector port combinations that are NOT allowed: B + C port, D + E port, any non-continuous port (example: A+C)Set Dip Switch Settings when using Y-connectorS/W Option S/W Option S/W Option S/W Option
	Default	Combination of A+B port	Combination of C+D port	Combination of E+F port

Space requirements

Using Y-connector	[MCU-S12*, MCU-S8*]When twinning 2 adjacent ports, Y-connectors can only be connected to the port combinations noted below.:[#1-A] + [#1-B] port, [#1-C] + [#1-D] port, [#1-E] + [#1-F] port[#2-A] + [#2-B] port, [#2-C] + [#2-D] port, [#2-E] + [#2-F] portY-connector port combinations that are NOT allowed: #1 Ports: B + C port, D + E port, any non-continuous port (example: A+C)#2 Ports: B + C port, D + E port, any non-continuous port (example: A+C)Set Dip Switch Settings when using Y-connectorDip Switch Settings when using Y-connector
		S/W Option S/W Option S/W Option S/W Option
		Default	Combination of A+B port	Combination of C+D port	Combination of E+F port
	<Section #1>
	Dip Switch Settings when using Y-connector
		S/W Option S/W Option S/W Option S/W Option
					[DG GT]
		Default	Combination of A+B port	Combination of C+D port	Combination of E+F port
	<Section #2>

3. Preparation before installation.

1) Place the pattern sheet on the ceiling at the spot where you want to install the indoor unit.

- Since the diagram is made of paper, it may shrink or stretch slightly due to temperature or humidity. For this reason, before drilling the holes maintain the correct dimensions between the markings.

2) Insert bolt anchors, use existing ceiling supports or construct a suitable support as shown in figure.

3) Install the suspension bolts depending on the ceiling type.

• Ensure that the ceiling is strong enough to support the weight of the unit. Before hanging the unit, test the strength of each attached suspension bolt.
• If the length of the suspension bolt is more than 1.5 m (4.92 ft), it is required to prevent vibration.
• If this is not possible, create an opening in the false ceiling in order to be able to use it to perform the required operations on the indoor unit.

4. Cautions about MCU installation.

When fixing the unit at an upper place using suspension bolts, use a nut and washer to vertically fasten the unit. The MCU has four suspension points to secure the MCU. All four suspension points must be used. ▶ Take care to ensure that the unit is installed in the correct orientation. If the MCU is installed upside down, noise will be generated and the unit may be damaged.

Space requirements

5. How to connect the pipe line.

* When installing the MCU, use the pattern sheet for installation that is provided with the product. * When welding the pipes, protect the product with the flame-proof sheet. * When connecting the MCU with outdoor units, the default direction is set in the MCU.

If installing in the opposite direction, weld the enclosed copper cap to each high pressure, low pressure, and liquid pipe.

6. How to connect the Y-connector

In case of connecting one indoor unit with a Y-connector to the MCU, the Y-connector must be connected in series.

Indoor #1 Indoor #2

Refrigerant piping

Pipe brazing instructions and cautions

Keeping refrigerant pipe clean and dry

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

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

Brazing the pipe

▶ 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 instructions when brazing the pipe.

The use of Nitrogen gas

1. Use Nitrogen gas when brazing the pipes as shown in the picture.
2. If you don't use Nitrogen gas when brazing the pipes, oxide may form inside the pipe. It can cause damage to the compressor and valves.
3. Adjust the flow rate of the nitrogen gas with a pressure regulator to maintain 0.05 m³/h (1.77 ft³/h) or less.

Direction of the pipe when brazing

- Performing the brazing of the pipe should be headed downwards or horizontally.

Refrigerant piping

Pipe insulating instructions and cautions

Make sure to check for gas leakage before completing the installation (hose and pipe insulation) and insulate hoses and pipes when there is no sign of leakage.

1. To avoid condensation problems, place T13.0 (1/2") or thicker Acrylonitrile Butadiene Rubber separately around each refrigerant pipe.

- When installing pipe insulation, make sure that the insulation seam is on the top of the pipes.

1. Wrap insulating tape around the pipes. Avoid compressing the pipe insulation while wrapping.
2. Finish wrapping insulating tape around the rest of the pipes leading to the outdoor unit.
3. Pipes and electrical cables connecting the unit with the outdoor unit must be secured to the structure with appropriate straps/hangers.

- All refrigerant connections must be accessible, in order to permit either unit maintenance or removing it completely.

- Must fit tightly against body without any gap.

1. Select the insulation of the refrigerant pipe.

▶ Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size. Indoor temperature of 30°C (86°F) and humidity of 85% is the standard condition. If installed in a high humidity condition, use one grade thicker insulator by referring to the table below. If installing in unfavorable conditions, use a thicker one. ▶ Insulator's heat-resistance temperature should be more than 120°C (248°F).

Pipe	Outer diameter		Insulator (Cooling, Heating)				Remarks
			General[30°C (86°F), 85%]		High humidity[30°C (86°F), over 85%]
			EPDM, NBR
	mm inch	mm inch mm inch
Liquid pipe	6.35~9.52 1/4	~3/8 9 3/8 9 3/8					Heating resisting temperature over 120°C (248°F)
	12.70~50.80 1/2	~2 13 1/2 13 1/2
Gas Pipe	6.35	1/4	13 1/2 19	3/4
	9.52~25.4	3/8~1	19 3/4 25	1
	28.58~44.45 1	1/8~1 3/4	19 3/4 32 1 1/4
	50.80 2	25 1 38 1 1/2

Refrigerant pipe before EEV kit and MCU or without EEV kit and MCU

▶ You can contact the gas side and liquid side pipes but the pipes should not be pressed. When contacting the gas side and gas side pipe, use 1 grade thicker insulator.

Refrigerant pipe after EEV kit and MCU

▶ Install the gas side and liquid side pipes, leave 10mm (3/8") of space. ▶ When contacting the gas side and liquid side pipe, use 1 grade thicker insulation.

Insulation for non-serial connection of MCU

▶ Exposed pipes should be insulated.

Exposed pipes on non-serial connection

• Prevent insulation thickness from getting thinner at the pipe hanger. Use adhesives on the seams to prevent moisture from entering.
• Wrap the refrigerant pipe with insulation tape if it is exposed to outside sunlight. • Install the refrigerant pipe ensuring that the insulation does not get thinner on the bent part or hanger of pipe.
• Add the additional insulation if the insulation plate gets thinner.

Installing the circuit breaker and wires

Power supply MCCB ELB Power cable		Earth cable Communication cable
Max : 242VMin : 198V	x [A]	x [A], 30mmA0.1 sec	0.0039inch 2 (2.5mm 2 )	0.0039inch 2 (2.5mm 2 )	0.0012~0.0023inch 2 (0.75~1.5mm 2 )

* x [A] ≥ 1.25 × 1.1 × ΣAi (x [A]: MCCB/ELB amperes, ΣAi: Sum of the rated current amperes of indoor units)

Installing the wire

Supply the 220-240V/208-230V power to L1, L2 (L, N) of MCU separately. Connect the communication cable from the outdoor unit to F1, F2 of MCU. Power line and communication line must be connected as shown in drawing.

220-240V/208-230V / Single Phase (Supply separately)

▶ Power line and communication line must be installed as shown in drawing. * Hole size is Φ 43.7 mm (1.72 inches)

▶ Choose the compressed socket based on the cross-section of the connecting wire.

Nominal dimensions for cable [mm2 (inch2)]		1.5 (0.002) 2.5 (0.003)				4 (0.006)
Nominal dimensions for screw [mm (inch)]		4 (0.157) 4 (0.157) 4 (0.157)				4 (0.157)
B	Standard dimension [mm (inch)] 6.6	(0.259) 8 (0.314) 6.6	(0.259) 8.5 (0.334)			9.5 (0.374)
	Allowance [mm (inch)] ±0.2 (0.007) ±0.2 (0.007)					±0.2 (0.007)
D	Standard dimension [mm (inch)] 3.4	(0.134) 4.2 (0.165)				5.6 (0.220)
	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)
d1	Standard dimension [mm (inch)] 1.7	(0.066) 2.3 (0.090)				3.4 (0.133)
	Allowance [mm (inch)]	+0.2 (±0.007) 0		+0.2 (±0.007) 0		+0.2 (±0.007) 0
E Min. [mm (inch)] 4.1 (0.161)		6 (0.236)				6 (0.236)
F	Min. [mm (inch)]	6 (0.236)		6 (0.236)		5 (0.196)
L	Max. [mm (inch)]	16 (0.629)		17.5 (0.688)		20 (0.787)
d2	Standard dimension [mm (inch)] 4.3	(0.169) 4.3 (0.169)				4.3 (0.169)
	Allowance [mm (inch)]	+0.2 (±0.007) 0		+0.2 (±0.007) 0		+0.2 (±0.007) 0
t	Min. [mm (inch)] 0.7 (0.027) 0.8 (0.031)					0.9 (0.035)

Setting MCU address and port

* When counting the quantity of MCUs while outdoor unit installation, one MCU is one.

However, in the case of MCU-S12NEK1N and MCU-S8NEK1N, one MCU must be counted as two MCUs.

Process
1.MCU address setting	Set MCU address by rotary switch.Example>If you want to set MCU address to 12, set upper rotary switch to 1 and set bottom rotary switch to 2MCU Address MCU Address Default Setting MCUadress to 12 Rotary switch for MCU ADDRESS
	*MCU-S12NEK1N & MCU-S8NEK1N models have two PBAs in the control box.The MCU addresses of the two PBAs must be set differently.Example>If you set MCU address of the section #1 PBA to 11, then set the section #2 PBA address to 12.<Section #1><Section #2>MCU AddressSetting MCUadress to 11MCU AddressSetting MCUadress to 12
2. DIP switch setting for using each port	Set using each port (connected to indoor unit) by DIP switchExample> If you want to connect indoor units at A,B,C,F port, set DIP switch 1,2,3,2 to 'ON'DIP S/WDefaultUsing A, B, C, F port
3. DIP switch setting for using Y-connector	[MCU-S6*, MCU-S4*, MCU-S2*, MCU-S1*]When twinning 2 adjacent ports, Y-connectors can only be connected to the port combinations noted below. Allowed Y-connector port combinations: A + B, C + D, E + F portsY-connector port combinations that are NOT allowed: B + C port, D + E port, any non-continuous port (example: A+C)Set Dip Switch Settings when using Y-connectorS/W Option S/W Option S/W Option S/W OptionDefault Combination of Combination of Combination of A+B port C+D port C+D port of E+F port

MCU Address MCU Address Section #2>

Wiring

Process

3. DIP switch setting for using Y-connector

[MCU-S12*, MCU-S8*]When twinning 2 adjacent ports, Y-connectors can only be connected to the port combinations noted below: [#1-A] + [#1-B] port, [#1-C] + [#1-D] port, [#1-E] + [#1-F] port[#2-A] + [#2-B] port, [#2-C] + [#2-D] port, [#2-E] + [#2-F] portY-connector port combinations that are NOT allowed: #1 Ports: B + C port, D + E port, any non-continuous port (example: A+C)#2 Ports: B + C port, D + E port, any non-continuous port (example: A+C)Set Dip Switch Settings when using Y-connector S/W Option S/W Option S/W Option S/W Option<Section #1>Dip Switch Settings when using Y-connector¬S/W Option S/W Option S/W Option S/W Option<Section #2>

4.MCUaddress and port setting for indoor unit(for wireless remote controller)

Auto setting: refer to 'auto pipe pairing' in outdoor installation manual.Manual setting:1.Wireless remote controller1) Enter mode to set option2) Assign an indoor unit MCU port address by wireless remote controller- The initial setting status of indoor unit ADDRESS(MAIN/RMC/MCU port) is "0A0000-100000-200000-300000"

Option

SEG1

SEG2 SEG

G3 SEG4

SEG5

SEG6

Explanation

PAGE Mode

Setting Main address

100-digit of indoor unit address

10-digit of indoor unit

The unit digit of an indoor unit

Remote Controller Display

Indication and Details

Indication

Details

Indication

Details

Indication

Details

Indication

Details

Indication

Details

Indication Details

0

A

Address setting mode

0

No Main address

0~9

100-digit

0~9

10-digit

0~9 A unit digit

1

Main address setting mode

Option

SEG7

SEG8 SEG9 SEG10 SEG11

SEG12

Explanation

PAGE

-

Setting RMC address

-

Group channel(*16)

Group address

Remote Controller Display

Indication and Details

Indication

Details

Indication

Details

Indication

Details

Indication Details

1

0

No RMC address

RMC1

0~F

RMC2 0~F

1

RMC address setting mode

Option

SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

Explanation

PAGE

-

Setting MCU PORT address

10-digit of MCU

The unit digit of MCU

PORT address

Remote Controller Display

Indication and Details

Indication

Details

Indication

Details

Indication

Details

Indication

Details

Indication Details

0

No MCU port address

0~1

10-digit

0~9

A unit digit A~F

PORT Location

1

MCU port address setting mode

Example> If you want to set theindoor unit to 'A' port of MCU #1.0A0000 - 100000 - 20101A -30000

4.MCU address and port setting for indoor unit (for wired remote controller)

2.Wired remote controller-Setting for MWR-WE1*N1)Press the Delete and Set buttons at the same time for more than three seconds. Then you will enter the additional function settings, and the [main menu] will be displayed.2)Assign an indoor unit MCU port address with main menu 4, sub menu 7 (MCU address is assingned to SEG 12, Port address is assinged to SEG 4). If you want to know the detailed operation of MWR-WE1*N, refer to installation manual for MWR-WE1*N.

Process
4.MCU address and port setting for indoor unit (for wired remote controller)	- Setting for MWR-WG0**1) Press the^ and buttons at the same time for more than 3 seconds. Then you can enter the password(0202) and press the OK button.2) Assign an indoor unit MCU port address with [Major] General → [Step1] Indoor unit/ Ventilator option → [Step2] MCU port → [Step3] MCU address & MCU port.※ For more information, please refer to the installation manual of MWR-WG0**
	Major Step1	Step2 Step3 Description
	General	Indoor unit/ Ventilator option	MCU port	MCU address 00 to 15
				MCU port A to F
	3. Setting by using S-NET Pro 2Set the pipe addresses by using Add-on > Change address on S-NET Pro 2. (For more information, see the S-NET Pro 2 Help.)

Wiring

- The Direct-connected indoor unit without MCU like below picture, be sure to set their options to "Cooling only unit setting" and then connect them to a low pressure gas pipe and a liquid pipe. This indoor unit only operate to cooling mode.

- If two or more indoor units are connected to a single port, switching between cooling and heating mode does not work while in auto mode. It is recommended to select the cooling or heating mode.

Direct-connected indoor unit without MCU (Connecting Only Low Pressure Gas Pipe / Liquid Pipe)

Set to Cooling Only Unit

1. Check whether power is supplied or not.

- When the indoor unit is not plugged in, there should be additional power supply in the indoor unit.

1. The panel(display) should be connected to an indoor unit to receive option.

β. Enter mode to set option (※ Detail method of entering option mode refer to indoor unit installation manual)

1. Set the 05 series installation option at SEG3 to '2' like this '052000 - 100000 - 20000 - 30000'.

(The default setting of an indoor unit 05 series installation is '050000 - 100000 - 20000 - 30000')

- When setting the "Cooling only unit" option, be sure to set the SEG 9 (Hot water heater) of 02 Series installation to "0".

- When "Cooling only unit" option is set, heating operation is not performed when the controller (wireless remote controller, central controller) is set to the heating mode.

* MCU-S12NEK1N & MCU-S8NEK1N models have two PBA in the control box.

There are two sections in the MCU. So, key operation must be set differently for each section.

K1K2

Display MCU status

Display indoor unit's address

Solenoid valve manual control

K3K4

K1(Pushed time)	Display Contents	Display segment				Remarks
		1	2	3	4
1	MCU address	0	Blank 0	0		MCU address 0
			Blank 0	1		MCU address 1
			Blank 0	2		MCU address 2
			Blank 1	1		MCU address 11
			Blank 1	5		MCU address 15
2	Mode switching EEV1 step	1	4	8	0	Ex) 480 steps
3	Mode switching EEV2 step	2	4	8	0	Ex) 480 steps
4	Mode switching EEV3 step	3	4	8	0	Ex) 480 steps
5	Mode switching EEV4 step	4	4	8	0	Ex) 480 steps
6	Mode switching EEV5 step	5	4	8	0	Ex) 480 steps
7	Mode switching EEV6 step	6	4	8	0	Ex) 480 steps
8	Subcooler EEV step	7	4	8	0	Ex) 480 steps
9	Subcooler-in sensor temperature	8	-	0	1	Ex) -1°C
			Blank 1	0		Ex) 10°C
10	Subcooler-out sensor temperature	9	-	0	1	Ex) -1°C
			Blank 1	0		Ex) 10°C
11	On/Off for solenoid valve A_C, A_H	A	-	* _C: Cooling solenid valve of port **_H: Heating solenid valve of port *3rd segment: Cooling solenid valve On: 1 / Off: 04th segment: Heating solenoid valve On: 1 / Off: 0
12	On/Off for solenoid valve B_C, B_H	B
13	On/Off for solenoid valve C_C, C_H	C
14	On/Off for solenoid valve D_C, D_H	D
15	On/Off for solenoid valve E_C, E_H	E
16	On/Off for solenoid valve F_C, F_H	F
17	On/Off for liquid by pass solenoid valve	G	Blank o	n		Ex) On
			o	F	F	Ex) Off
18	Version	8	A	2	0	Ex) October 20, 2008 → 8A 20
19	End of K1 display

Wiring

K2(Pushed time)	Display Contents	Display segment				Remarks
		1	2	3	4
1 Indoor	unit main address for matching with port A A - 0 0 Indoor unit	main	address of	port A : 0
2 Indoor	unit main address for matching with port B B - 0 3 Indoor unit	main	address of	port B : 3
3 Indoor	unit main address for matching with port C C - 0 6 Indoor unit	main	address of	port C : 6
4 Indoor	unit main address for matching with port D D - 0 9 Indoor unit	main	address of	port D : 9
5 Indoor	unit main address for matching with port E E - 1 1 Indoor unit	main	address of	port E : 11
6 Indoor	unit main address for matching with port F F - 1 5 Indoor unit	main	address of	port F : 15
7 End of K2 display

* When two or more indoor units are connected to one port, indoor unit addresses are sequentially displayed at 2-second intervals from the lowest address indoor unit. (After displaying all, the first indoor unit is displayed again.)

K4 Switch (Solenoid Valve Manual Control)

According to the push time of the K4 switch, A_C, A_H, ..., F_C, F_H, and the liquid bypass solenoid valve open in order. In Solenoid Valve Manual Control mode, the valve operates by K4 push time irrespective of indoor operation mode. In Solenoid Valve Manual Control mode, pushing the K1 switch starts DATA DISPLAY MODE and valves will operate following indoor operation mode.

K4(Push time)	Display Contents	Display segment
		1	2	3	4
1	A_C sol valve ON, other sol valve Off	P	A	1	0
2	A_H sol valve ON, other sol valve Off	P	A	0	1
3	B_C sol valve ON, other sol valve Off	P	B	1	0
4	B_H sol valve ON, other sol valve Off	P	B	0	1
5	C_C sol valve ON, other sol valve Off	P	C	1	0
6	C_H sol valve ON, other sol valve Off	P	C	0	1
7	D_C sol valve ON, other sol valve Off	P	D	1	0
8	D_H sol valve ON, other sol valve Off	P	D	0	1
9	E_C sol valve ON, other sol valve Off	P	E	1	0
10	E_H sol valve ON, other sol valve Off	P	E	0	1
11	F_C sol valve ON, other sol valve Off	P	F	1	0
12	F_H sol valve ON, other sol valve Off	P	F	0	1
13	Liquid b/p sol valve ON, other sol valve Off	P	S	1	0
14	sol valve Manual Control MODE end	P	Communication DATA Display

MCU Installation Checklist

Item Check
1. If the gas leaking test has been completed or not.
2. If MCU has been fixed securely enough to avoid the danger of vibration and falling or not.
3. The Insulation condition of the pipe. (Refrigerant pipe, Pipe connection.)
4. If the R-410A refrigerant has been charged or not.If the subsidiary unit for R-410A has been used or not.
5. Checking malfunction of the wire and the communication line.
6. If the MCU frame has been installed upside-down or not.
7. If the wire earthing work has been done or not.
8. If the space between sidewalls, ceiling concrete, and the ceiling Tex has been secured enough or not to install the MCU frame.
9. If the supporting tool of the MCU pipe has been safely placed in 1.5m intervals or not.
10. If the prescribed wire has been used or not.
11. If the supplied power is proper or not.
12. If the additional refrigerant is proper or not.(Refer to the installation manual of the HR outdoor unit.)

This product is India RoHS compliant.