Panasonic CS-YC12NKV-6, CU-YC12NKV-6 Diagram

Order No: PAPAGZ120406CE

Indoor Unit Outdoor Unit

CS-YC12NKV-6 CU-YC12NKV-6

This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the products dealt with in this service information by anyone else could result in serious injury or death.

WARNING

TABLE OF CONTENTS

1. Safety Precautions.............................................3

2. Specification.......................................................5

3. Location of Controls and Components............7

3.1 Indoor Unit......................................................7

3.2 Outdoor Unit...................................................7

3.3 Remote Control..............................................7

4. Dimensions.........................................................8

4.1 Indoor Unit......................................................8

4.2 Outdoor Unit...................................................9

5. Refrigeration Cycle Diagram...........................10

6. Block Diagram ..................................................11

7. Wiring Connection Diagram............................12

8. Installation Instruction.....................................13

8.1 Select the Best Location ..............................13

8.2 Indoor Unit....................................................14

8.3 Outdoor Unit..................................................17

9. Operation Control.............................................19

9.1 Cooling Operation ........................................19

9.2 Soft Dry Operation .......................................20

9.3 Automatic operation .....................................20

9.4 Indoor Fan Speed Control............................21

9.5 Outdoor Fan Speed Control.........................22

9.6 Vertical Airflow Direction Control..................22

9.7 Horizontal Airflow Direction Control .............22

9.8 Timer Control ...............................................22

9.9 Random Auto Restart Control......................22

10. Protection Control............................................23

10.1 Restart Control (Time Delay Safety Control)23

10.2 7 minutes Time Save Control.......................23

10.3 60 seconds Forced Operation......................23

10.4 30 Seconds Forced Operation .....................23

10.5 Anti-Freezing Control ...................................23

10.6 Compressor Reverse Rotation Protection

Control...................................................................23

10.7 Dew Prevention Control ...............................24

11. Servicing Mode.................................................25

11.1 Auto Off/On Button.......................................25

11.2 Remote Control Button.................................25

© Panasonic Appliances Air-Conditioning (Guangzhou) Co.,Ltd
(PAPAGZ) 2012. Unauthorized copying and distribution is a
violation of law.

12.

Troubleshooting Guide....................................26

12.1 Refrigeration Cycle System..........................26

13. Disassembly and Assembly Instructions ......28

14. Technical Data ..................................................31

14.1 Operation Characteristics.............................31

15. Exploded View and Replacement Pars List...33

15.1 Indoor Unit....................................................33

15.2 Outdoor Unit.................................................35

2

1. Safety Precautions

is able to withstand the set’s weight. If the strength is not enough or installation

outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will

• Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.

• Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the

power plug and main circuit for the model installed.

• The caution items stated here must be followed because these important contents are related to safety. The
meaning of each indication used is as below. Incorrect installation or servicing due to ignoring of the instruction
will cause harm or damage, and the seriousness is classified by the following indications.

WARNING
CAUTION

• The items to be followed are classified by the symbols:

• Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation,

care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for
future reference.

This indication shows the possibility of causing death or serious injury
This indication shows the possibility of causing injury or damage to properties.

Symbol with white background denotes item that is PROHIBITED from doing.

Symbol with dark background denotes item that must be carried out.

WARNING

1. Engage dealer or specialist for installation. If installation done by the user is defective, it will cause water leakage,
electrical shock or fire.

2. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical

shock or fire.

3. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water

leakage, fire or electrical shock.

4. Install at a strong and firm location which

is not properly done, the set will drop and cause injury.

5. Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit at veranda of high rise building,

child may climb up to outdoor unit and cross over the handrail and causing accident.

6. For electrical work, follow the local national wiring standard, regulation and this installation instruction. An independent

circuit and single
cause electrical shock or fire.

7. This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual

Current Device (RCD). Otherwise, it may cause electrical shock and fire in case equipment breakdown or insulation
breakdown.

8. This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning

rod and telephone. Otherwise, it may cause electrical shock in case equipment breakdown or insulation breakdown.

9. Do not use joint cable for indoor/outdoor connection cable. Use the specified Indoor/Outdoor connection cable, refer to

installation instructions CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor / outdoor
connection. Clamp the cable so that no external force will be acted on the terminal. If connection or fixing is not
perfect, it will cause heat up or fire at the connection.

10. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed

perfectly, it will cause fire or electrical shock.

11. When carrying out piping connection, take care not to let air substances other than the specified refrigerant go into

refrigeration cycle. Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle, explosion
and injury.

12. Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single

outlet with other appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.

13. During installation, install the refrigerant piping properly before running the compressor. Operation of compressor

without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in
refrigeration cycle and result in explosion, injury etc.

14. During pump down operation, stop the compressor before remove the refrigeration piping. Removal of refrigeration

piping while compressor is operating and valves are opened will cause suck-in of air, abnormal high pressure in
refrigeration cycle and result in explosion, injury etc.

15. After completion of installation or service, confirm there is no leakage of refrigerant gas. It may generate toxic gas

when the refrigerant contacts with fire.

16. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with

fire.

3

17. Recommended installation height for indoor unit shall be at least 2.5 m.

18. The appliance shall be installed in accordance with national wiring regulations.

19. Keep away from small children, the thin film may cling to nose and mouth and prevent breathing.

20. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long
period, the flare may break and cause refrigerant gas leakage.

21. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.

22. Do not modify the machine, part, material during repairing service.

23. Must not use other parts except original parts describe in catalog and manual.

24. Do not tie up the power supply cord into a bundle by hand. Abnormal temperature rise on power supply cord may
happen.

25. Do not sit or step on the unit, you may fall down accidentally.

26. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and

prevent breathing.

27. When install or relocate air conditioner, do not let any substance other than the specified refrigerant, eg.

air etc. mix into refrigeration cycle (piping). Mixing of air etc. will cause abnormal high pressure in
refrigeration cycle and result in explosion, injury etc..

28. Indoor unit must be installed close against the wall.

29.All-pole disconnection incorporated in the fixed wiring is to be provided.

CAUTION

1. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at
surrounding of the unit, it may cause fire.

2. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room
and damage the furniture.

3. Do not touch outdoor unit air inlet and aluminums fin. It may cause injury.

4. Select an installation location which is easy for maintenance.

5. Power supply connection to the air conditioner.

Connect the power supply cord of the air conditioner to the mains using one of the following methods.
Power supply point should be in easily accessible place for power disconnection in case of emergency.
In some countries, permanent connection of this air conditioner to the power supply is prohibited.

1) Power supply connection to the receptacle using a power plug.
Use an approved 15/16A power plug with earth pin for the connection to the receptacle.

2) Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A circuit breaker for
the permanent connection. It must be a double pole switch with a minimum 3.5 mm contact gap.

6. Do not release refrigerant.
Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts.
Take care of the liquid refrigerant, it may cause frostbite.

7. Installation or servicing work.
It may need two people to carry out the installation and service work.

8. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

9. Do not touch the sharp aluminium fin, sharp parts may cause injury.

10. Thermal fuse specification for indoor unit: 250V 3.15A T3.15AL.

4

2. Specification

Model

Power Supply

Capacity

Running Current A 5.60

Input Power W 1200

Cooling

EER

Power Factor % 97

Indoor Noise (H / L ) dB-A 39 / 33 /

Outdoor Noise (H / L) dB-A 49 / -

Max Current (A) / Max Input Power (W) 8.50 / 1.500k

Starting Current (A) 34.0

Indoor CS-YC12NKV-6

Outdoor CU-YC12NKV-6

Phase, Hz Single, 60

V 220

kW 3.42

BTU/h 11700

kJ/h 2949

W/W 2.85

Btu/hW 9.75

Compressor

Indoor Fan

Fan Speed

Outdoor Fan

Type Hermetic Motor compressor

Motor Type Induction (2 poles)

Output Power W 1100

Type Cross-flow fan

Material AS(GF30%)

Motor Type AC (4 poles)

Input Power W 62.04

Output Power W 20

Lo rpm 850

Me rpm 960

Hi rpm 1100

Type Propeller

Material PP(GF+PD)30%

Motor Type AC (6 poles)

Input Power W 77.22

Output Power W 28

Speed Hi rpm 880

Moisture Removal L/h (Pt/h) 2.0 (3.4)

Lo m3/min (ft3/m) 9.3 (327)

Indoor Airflow

Outdoor Airflow Hi m3/min (ft3/m) 21.7 (768)

Refrigeration Cycle

Me m3/min (ft3/m) 10.5 (370)

Hi m3/min (ft3/m) 12.0 (424)

Control Device Capillary Tube

5

Refrigerant Oil cm3 ATMOS NM56 OR SUNISO 4GDID (350)
Refrigerant Type g (oz) R22, 900 (31.7)
Height(I/D / O/D) mm (inch) 283 (11-5/32) 530(20-7/8)

Dimension

Weight Net (I/D / O/D) kg (lb) 8.0 (18) 26 (57)

Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2)

Length range (min – max) m (ft) 3 (9.8) ~15 (49.2)

Piping

Drain Hose

Indoor Heat

Exchanger

I/D & O/D Height different m (ft) 5.0 (16.4)

Additional Gas Amount g/m (oz/ft) 20 (0.2)

Length for Additional Gas m (ft) 5.0 (16.4)

Width (I/D / O/D) mm (inch) 803 (31-5/8) 650(25-19/32)
Depth (I/D / O/D) mm (inch) 214 (8-7/16) 230 (9-1/16)

Standard length m (ft) 5.0 (16.4)

Inner Diameter mm 16

Length mm 500

Fin Material Pre coated

Fin Type Slit Fin

Row x Stage x FPI 2 x 16 x 21

Size (W x H x L) mm 610 x 336 x 25.4

Fin Material Pre coated

Outdoor Heat

Exchanger

Air Filter

Power Supply Indoor

Power Supply Cord A 10

Thermostat -

Protection Device -

Indoor Operation Range

Outdoor Operation Range

1.

Cooling capacities are based on indoor temperature of 27°C DRY BULB (80.6°F DRY BULB), 19.0°C WET BULB

Fin Type Slit Fin

Row x Stage x FPI 2 x 24 x 18

Size (W x H xD) mm 565.2(545.3) x504.0 x 12.7

Material P.P.HONEY COMB

Type One-touch

DRY BULB WET BULB

Maximum 32 23

Minimum 16 11

Maximum 43 26

Minimum 16 11

(66°F WET BULB) and outdoor air temperature of 35°C DRY BULB (95°F DRY BULB), 24°C WET BULB (75.2°F
WET BULB)

6

3. Location of Controls and Components

3.1 Indoor Unit

3.2 Outdoor Unit

INDICATOR

POWER GREEN

TIMER ORANGE

3.3 Remote Control

7

4. Dimensions

4.1 Indoor Unit

Unit: mm

Unit: mm

Unit: mmUnit: mm

8

4.2 Outdoor Unit

9

5. Refrigeration Cycle Diagram

Evaporator

Condenser

10

6. Block Diagram

POWER SUPPLY AC 220V, 60 Hz, SINGLE PHASE,

11

7. Wiring Connection Diagram

12

8. Installation Instruction

Rated

Length

Elevation

Piping

Length

Refrigerant

add

8

.1.3 Indoor/Outdoor Unit

8.1 Select the Best Location

8.1.1 Indoor Unit

• Do not install the unit in excessive oil fume area such as kitchen,
workshop and etc.

• There should not be any heat source or steam near the unit.

• There should not be any obstacles blocking the air circulation.

• A place where air circulation in the room is good.

• A place where drainage can be easily done.

• A place where noise prevention is taken into consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the wall, ceiling,

fence or other obstacles.

8.1.2 Outdoor Unit

• If an awning is built over the unit to prevent direct sunlight or rain,
be careful that heat radiation from the condenser is not obstructed.

• There should not be any animal or plant which could be affected
by hot air discharged.

• Keep the spaces indicated by arrows from wall, ceiling, fence or
other obstacles.

• Do not place any obstacles which may cause a short circuit of the
discharged air.

• Outdoor unit is installed in outdoors.

• If piping length is over the [Piping length for add. gas], additional

refrigerant should be added as shown in the table.

Model

CS/CU-

YC12NKV-6

Piping size

Max

Gas

Liquid

(inch)

(inch)

3/8” 1/4" 5 5 3 15 20 7.6

(m)

(m)

Min

(m)

Max

Piping

Length

(m)

Additional

(g/m)

Example:
If th

e unit is installed at a 10m distance, the quantity of additional refrigerant

Should be 48g.…… (10-7.6) m x 20g/m = 48g

Piping
length

for

gas
(m)

Installation Diagram

*This illustration is for explanation purposes only.
The indoor unit will actually face a different way.

13

Wall

8.2 Indoor Unit

Caution

8.2.1 How to Fix Installation Plate

The mounting wall is strong and solid enough to prevent if from the vibration.
The centre of installation plate should be at more

than 450 mm at right and left of the wall.
The distance from installation plate edge to ceiling

should more than 120 mm.
From installation plate left edge to unit’s left side is

170 mm.
From installation plate right edge to unit’s right

side is 160 mm.

B : For left side piping, piping connection for liquid should be about 105 mm from this line.

○

: For left side piping, piping connection for gas should be about 154 mm from this line.

1 Mount the installation plate on the wall with 5 screws or more. (If mounting the unit on the wall, consider

using anchor bolts.) Always mount the installation plate horizontally by aligning the marking-off line with
the thread and using a level gauge.

2 Drill the piping plate hole with ø70 mm hole-core drill.

 Put measuring tape at position as shown in the diagram above. The hole centre is

obtained by measuring the distance namely 178.5 mm and 161 mm for left and right
hole respectively.

 Drill the piping plate hole at either the right or left and the hole should be slightly slanted

to the outdoor side.

8.2.2 To Drill a Hole in the Wall and Install a Sleeve of
Piping

1 Insert the piping sleeve to the hole.
2 Fix the busing to the sleeve.
3 Cut the sleeve until it extrudes about 15mm from the wall

When the wall is hollow, please be sure to use the sleeve for tube
ass’y to prevent dangers caused by mice biting the connecting
cable.

4 Finish by sealing the sleeve with putty or caulking compound at the

final stage.

Indoor Outdoor

Sleeve for
tube ass’y

Ø 70 through hole

15 mm

Approx. 5 - 7 mm

Bushing for tube ass’y

Putty or caulking compound

14

8.2.3 Indoor Unit Installation

15

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Connect the Cable to the Indoor Unit

1 The inside and outside connecting cable can be connected without removing the front grille.
2 Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed r 3 x

1.5mm2 flexible cords, type designation 245 IEC 57 or heavier cord.
 Ensure the color of wires of outdoor unit and the terminal numbers are the same to the indoor’s

respectively.

 Earth lead wire shall be longer than the other lead wires as shown in the figure for the electrical safety

in case of the slipping out of the cord from the anchorage.

 Secure the cable onto the board with the holder (clamper).

8.2.3.1 Wiring Stripping and connecting requirement

8.2.4 Cutting and flaring the piping

1 Please cut using pipe cutter and then remove the burrs.
2 Remove the burrs by using reamer. If burrs are not removed, gas

leakage may be caused. Turn the piping end down to avoid the
metal powder entering the pipe.

3 Please make flare after inserting the flare nut onto the copper pipes.

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16

8.3 Outdoor Unit

B

A

S

o

8.3.1 Install the Outdoor Unit

• After selecting the best location, start installation according to indoor/outdoor unit installation diagram.
1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2 When installing at roof, please consider strong wind and earthquake.

Please fasten the installation stand firmly with bolt or nails.

A B C D

474 86.7 19.9 261

8.3.2 Connecting the Piping

8.3.2.1 Connecting the piping to indoor unit

Please make flare after inserting flare nut (locate at joint portion, of tube assembly) onto the copper pipe. (In case of
using long piping)
Connect the piping

• Align the center of piping and sufficiently tighten the flare nut with fingers.

• Further tighten the flare nut with torque wrench in specified torque as stated in the table.

8.3.2.2 Connecting the piping to outdoor unit

Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the
flare nut (locate at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to
the specified torque as stated in the table.

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Do not over tighten. Over tightening causes
gas leakage.

Piping size Torque

1/2" 55N•m (5.5kgf.m)
1/4" 18N•m (1.8kgf.m)

C

D

8.3.3 Evacuation of the equipment

When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following
procedures.

1 Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way

valve.



Be sure to connect the end of the charging hose with the push pin to the service port.

2 Connect the center hose of the charging set to a vacuum pump.

17

3 Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from

0cmHg (0 Mpa) to -76cmHg (-0.1Mpa). Then evacuate the air approximately ten minutes.

4 Close the Low side valve of the charging set and turn off the vacuum pump. Make sure the needle in the

gauge does not move after approximately five minutes.

Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5 Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6 Tighten the service port caps of the 3-way valve at a torque of 18Nm with a torque wrench.
7 Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”

using a hexagonal wrench (4mm).
8 Mount valve caps onto the 2-way valve and the 3-way valve.



Be sure to check for gas leakage.

Caution

• If gauge needle does not move from 0cmHg (0Mpa) to -76cmHg (-0.1Mpa), in step 3 above take the following
measure:

• If the leak stops when the piping connections are tightened further, continue working from step 3.

• If the leak does not stop when the connections are retightened, repair location of leak.

• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant,

it may cause frostbite.

8.3.4 Connect the cable to the outdoor unit

1 Remove the control board cover from the unit by loosening the screw.
2 Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 3 x

1.5mm2 flexible cords, type designation 245 IEC 57 or heavier cord.

3 Secure the cable onto the control board with the holder (clamper).
4 Attach the control board cover back to the original position with the screw.
5 For wiring stripping and connection requirement, refer to instruction 8.2.3.1of indoor unit.

8.3.5 Piping insulation

1 Please carry insulation at piping connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram.

Please wrap the insulated piping end to prevent water from going inside the piping.

2 If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by

using POLY-E-FOAM with thickness 6mm or above.

18

9. Operation Control

9.1 Cooling Operation



Cooling Operation can be set using remote control.



This operation is applied to cool down the room temperature to the setting temperature set on the
remote control.



The remote control setting temperature, which takes the reading of intake air temperature sensor, can
be adjusted from 16℃ to 30℃



During cooling operation, the compressor will stop and restart as shown in figure below:

9.1.1 Time Graph for Cooling Operation

19

9.2 Soft Dry Operation



Soft Dry Operation can be set using remote control.



Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.



When selecting Soft Dry operation, the operation will be cooling until the room temperature reaches the set
temperature on remote control, and then soft Dry will be activated.



The Soft Dry operation runs for less tan 10 minutes and once stop it will not be activated within 6 minutes.



Dry operation area is shown as follows:-

9.2.1 Time Graph for Soft Dry operation

9.3 Automatic operation

Automatic operation can be set using remote control.
Operation mode is determined by set temperature of remote control, indoor intake temperature.
This operation starts to operate with indoor fan at SLo speed for 20 seconds to judge the intake air temperature.
After judged the temperature, the operation mode is determined by referring below standard.

20

9.4 Indoor Fan Speed Control

Indoor fan speed can be set using remote control.

9.4.1 Fan Speed rotation Chart

Model

CS-YC12NKV-6

Hi Me Lo

1080 960 800

speed

9.4.2 Automatic Fan Speed Control



When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in
the table.

Shi Hi Me Lo Lo- SLo SSLo

Cooling
Soft Dry



Auto Fan Speed during cooling operation:-

1. At the beginning of each compressor starts operation, indoor fan speed increases gradually for deodorizing
purpose.

2. Indoor fan will rotate alternately between off and on as shown in below diagram.

Auto o o o
Manual o o o
Auto o o
Manual o o

*1. Fan speed will be at Hi till the compressors ceases when set temperature is reached.
*2. Fan Speed will be at Me when the compressor restarts.



Auto Fan Speed during soft Dry operation.

1. Indoor fan will rotate alternately between OFF and Lo-.

2. At the beginning of each compressor starts operation, indoor fan will increase fan speed gradually for deodorizing
purpose.

21

9.4.3 Manual Fan Speed Control



Manual fan speed can be set with Fan Speed selection button at the remote control



There are 3 level of fan speed setting : Lo, Me, Hi

9.5 Outdoor Fan Speed Control



There is only one speed for outdoor fan motor.



When compressor stops, outdoor fan will continue running for 30 seconds.

9.6 Vertical Airflow Direction Control



The louver can be adjusted by pressing the button at remote control to the desired position.



When operation stops using remote control, the discharge vent is reset, and stop at the closing position..

Operation mode

Cooling/ Soft Dry

During judgment

Manual 18
Auto
Manual
Auto

°

28

°

37

°

18° ~ 55

46

°

°

Depending on remote control setting

18

°

55

°

9.7 Horizontal Airflow Direction Control



Horizontal airflow direction louver can be adjusted manually by hand.

9.8 Timer Control



Timer can be set using remote control (12-hour timer setting). When Timer- ON is set for cooling and Soft Dry
operation, the unit with timer set will start operate earlier than the setting time. This is to provide a comfortable
environment when reaching the set ON time.



For Cooling and Soft Dry operation, the operation will start 15 minutes before the set time.



For Automatic operation, the indoor fan will operate at Slo speed for 25 seconds, 30 minutes before the set time
to detect the intake air temperature to determine the operation mode. The power LED will blink during detection.



If main power supply is switched off or encounter power failure, timer setting will be cancel. Timer needs to be
reset.



The ON timer or OFF timer will be cancel by pressing CANCEL button.



The ON timer or OFF timer will be cancel is ON/OFF operation button is pressed.



Each timer setting is effective only once.

9.9 Random Auto Restart Control



If there is a power failure during operation, the air conditioner will automatically restart after 3 minutes when the
power is resumed.



It will start with previous operation mode and airflow direction.



If timer is set, timer setting will be cancel. The timer needs to be reset after the power is resumed.

22

10. Protection Control

10.1 Restart Control (Time Delay Safety Control)

• When the thermo-off temperature is reach during Cooling operation, the compressor stops for 3 minutes
(minimum) before resume operation.

• When the thermo-off temperature is reach during Soft Dry operation, the compressor stops for 6 minutes
(minimum) before resume operation.

• This control is not applicable if the power supply is cut off and on again.

• This phenomenon is to balance the pressure inside the refrigerant cycle.

10.2 7 minutes Time Save Control



The compressor will automatically operate if it has stopped for 7 minutes even if the room temperature Is not
reached the Thermo-ON point.



This phenomenon is to prevent the room humidity raising.

10.3 60 seconds Forced Operation



Once the air conditioner is turned on, the compressor will not stop within 60 seconds in normal operation even if
the intake air temperature has reached the thermo-off point. However, forced stop by pressing the OFF/ON
operation button at the remote control is permitted.



This phenomenon is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit.

10.4 30 Seconds Forced Operation

• Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation
although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the
OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit.

• The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a
full cycle and return back to the outdoor unit.

10.5 Anti-Freezing Control



If the temperature of evaporator is lower than 2℃ continuously for 4 minutes, the compressor will cease to
prevent the evaporator from freezing. Fan Speed setting will not be changed.



When temperature of evaporator reach 10℃, compressor will restart.



During Cooling and soft Dry operation, the Time Delay Safety Control will be applied if the recovery time is too
short.

10.6 Compressor Reverse Rotation Protection Control

If the compressor has been continuously running for 5 minutes or longer, and the difference of temperature between
intake air and evaporator is continuously lower than 2.5℃ or below for 2 minutes, the compressor will stop, and then
restart 3 minutes later. (Time Delay Safety Control is effective.)

Compressor runs ≥ 5 min

△T≤ 2.5℃ for 2 min

△ T= Intake air temperature – Indoor heat exchanger temperature

Compressor stops Compressor restarts 3 minutes later

23

10.7 Dew Prevention Control



To prevent dew formation at indoor unit discharge area, the horizontal air vane is automatically set at position 2
(refer to 9.6).



This control is activated when following conditions are fulfilled:-



Compressor runs continuously for 60 minutes.



Horizontal air vane is at position 4 or 5 (refer to 9.6).



Actual fan speed is lower than Lo level.



Intake air temperature is lower than 29℃



Intake air temperature changes within 2℃ for more than 30 minutes.



This control stopped if anyone of the following conditions is achieved:-



Any of the above condition is out of the range described above.



Operation stops.



Power OFF.

24

11. Servicing Mode

OFF/ON

11.1 Auto Off/On Button

ON

5 sec 10 sec 15 sec 20 sec

Auto Operation Test Run Operation

(Forced Cooling Operation)

Beep Beep x 2 Beep x 3 Beep x 4

1 AUTO OPERATION MODE

Auto Operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be
used to operate air conditioner with limited function if remote control is misplaced or malfunction.

2 TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)

The Test Run Operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5
seconds to below 10 seconds. A “beep” sound will be heard at the fifth seconds, in order to identify the
starting of this operation.

3 REMOTE CONTROL RECEIVING SOUND OFF/ON MODE

Procedure of switching OFF/ON signal receiving sound:



Press and hold "AUTO OFF/ON" button for approximately 10 seconds until you hear 2
“beep” sounds.



Repeat above step within 60 seconds, and the signal receiving sound will be OFF/ON.

4 Random Auto Restart Function OFF/ON



Factory setting is ON.



Press and hold “AUTO OFF/ON” button for approximately 15 seconds until you hear
triple beep sound.



Repeat above step within 60 seconds, and then auto restart control will be switch
OFF/ON.

Remote Control

Receiving Sound

Random Auto Restart

OFF/ON

11.2 Remote Control Button

11.2.1 Mode selecting button



AUTO, COOL, DRY, FAN can be selected by pressing “MODE” button.

11.2.2 Temperature adjusting button

Temperature adjusting range is between 16 ℃~30 ℃

11.2.3 Fan speed button

There are 3 speed levels other than AUTO can be selected. The display on the remote controller changes as follows by pressing
the FAN SPEED button.

11.2.4 AIR SWING button

To adjust vertical airflow directions by pressing AIR SWING button (5 options and AUTO)

25

12. Troubleshooting Guide

•

•

•

12.1 Refrigeration Cycle System

In order to diagnose malfunctions, ensure the air conditioner is free
from electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan. The normal
outlet air temperature and pressure of the refrigeration cycle
depends on various conditions, the standard values for them are
shown in the table to the right.

Normal Pressure and Outlet Air Temperature (Standard)

Cooling Mode 0.4 ~ 0.6 (4 ~ 6) 12 ~ 16

Gas Pressure

Mpa(kg/cm2G)

Condition: Indoor fan speed = High

Outdoor temperature = 35°C at cooling mode.

Outlet air

Temperature

(°C)

Different in the intake

and outlet

air temperatures

Less than 8°C at the cooling mode

Value of electric current

during operation

Lower than specified

More than 8°C

(15 minutes after an

operation is started) at

cooling mode.

Higher than specified

Normal

Dusty condenser

preventing heat radiation

Excessive amount

of refrigerant

Measuring the air

temperature different

Measuring electric current

during operation

Cooling

Gas side pressure

Mode

High

Inefficient compressor

Measuring gas side

pressure

Low

Low

Insufficient refrigerant

Clogged strainer or

capillary cube

26

12.1.1 Relationship between the condition of the air conditioner and pressure and

electric current

Condition of the

air conditioner

Insufficient refrigerant

(gas leakage)

Clogged capillary tube or

strainer

Short circuit in the indoor unit   

Low Pressure High Pressure Electric current during operation

  

  

Cooling Mode

Heat radiation deficiency

of the outdoor unit

Inefficient compression   

• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is started.

  

12.1.2 Diagnosis methods of a malfunction of a compressor

Nature of fault Symptom

Insufficient compressing

of a compressor

Locked compressor



Electric current during operation becomes approximately 20% lower thank the normal value.



The discharge tube of the compressor becomes abnormally hot (normally 70℃ to 90℃ )



The different between high pressure and low pressure becomes almost zero.



Electric current reaches a high level abnormally, and the value exceeds the limit of an ammeter. In
some cases, a breaker turns off.



Then compressor has a humming sound.

27

13. Disassembly and Assembly Instructions

Removal Procedure for

front panel

Removal Procedure for

Front

Grille

Screw

High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged
sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks.

1. Open the intake grille and pull it to the horizontal position.

2. Pull up the front panel and be careful of the hooks on both sides of intake grille. Slightly press the pieces and pull
the front panel off.

WARNING

1. Remove the two caps at the discharge port (right and left) and then release the two screws on both sides.

Cap

28

2. Remove the air filters and then pull out the front grille form the unit body.

Removal Procedure for

Discharge Grille

Front grille

1. Separate the drain hose and the drain plate. 2. Pull out the discharge grille slightly.

29

Removal Procedure for

Cross Flow Fan

1. Release fixing screws on both side, disassembly the fixing board from evaporator on the left side and pull out the
whole evaporator.

Fixing Screw

2. Loose the fixing screw of the cross flow fan.

3. After removing the bearing, indoor fan can be taken out from the left side

Bearing

4. Lift up the indoor fan slightly, and then pull the fan motor out.

Fan motor

30

14. Technical Data

14.1 Operation Characteristics

Cooling Characteristics at Different Outdoor Air Temperature

31

Cooling Characteristics at Different Piping Length

32

15. Exploded View and Replacement Pars List

15.1 Indoor Unit

Note
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

20

33

34

31

32

35

33

REF.

NO.

1 CHASSIS COMPLETE 1 CWD50C1728
2 FAN MOTOR(AC,220V,18W) 1 CWA921521
3 CROSS FLOW FAN COMPLETE 1 CWH02C1101
4 BEARING ASSY 1 CWH64K1007
5 EVAPORATOR 1 CWB30C3916
6 AUXILIARY TUBE ASS'Y 1 CWT01C6019
7 DRAIN PLUG 1 CWH521096
8 DISCHARGE GRILLE COMPLETE 1 CWE20C3301

9 AIR SWING MOTOR(DC,12W,300OHM) 1 CWA981272
10 HORIZONTAL AIR FLOW VANE 2 CWE241341A
11 VERTICAL AIR FLOW VANE 1 CWE24C1415
12 C-BOX COMPLETE 1 CWH14C9445
13 CONTROL BOARD CASING 1 CWH102438
14 PARTICULAR PIECE 1 CWD933355
15 TERMINAL BOARD COMPLETE 1 CWA28C2384
16 POWER SUPPLY CORD COMPLETE 1 CWA20C3004
17 MAIN PCB 1 CWA73C6455
18 SENSOR 1 CWA50C2892
19 CONTROL BOARD TOP COVER 1 CWH131454
20 REMOTE CONTROL 1 CWA75C3748
21 FRONT GRILLE COMPLETE 1 CWE11C5406
22 INTAKE GRILLE 1 CWE22K1597
23 GRILLE DOOR 1 CWE14C1081
24 AIR FILTER 2 CWD001310
25 SCREW-FRONT GRILLE 2 CWXTT4+16CFJ
26 CAP-FRONT GRILLE 2 CWH521146
27 DRAIN HOSE 1 CWH851136
28 OPERATING INSTRUCTIONS 1 CWF568480
29 INSTALLATION INSTRUCTIONS 1 CWF615269
30 INSTALLATION PLATE 1 CWH361120

31 C.C.CASE 1 CWG567805
32 SHOCK ABSORBER( R ) 1 CWG713356
33 SHOCK ABSORBER( L ) 1 CWG713355
34 SHOCK ABSORBER 1 CWG713481
35 CUSHION SHEET 1 CWG661039

(Note)

• All parts are supplied from PAPAGZ, China.

• “O” marked parts are recommended to be kept in stock.

PART NAME & DESCRIPTION QTY.

Packing Materials

CS-YC12NKV-6 REMARK

34

15.2 Outdoor Unit

33

31

29

32

30

Note
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.

35

REF. NO.

PART NAME & DESCRIPTION QTY. CU-YC12NKV-6 Remark

1 CHASSIS ASS'Y 1 CWD52K1216A
2 FAN MOTOR BRACKET 1 CWD541097
3 SCREW-FAN MOTOR BRACKET 2 CWH551148A
4 FAN MOTOR(AC,220V,28W) 1 CWA951777
5 SCREW-FAN MOTOR MOUNT 3 CWH55406J
6 PROPELLER FAN ASS'Y 1 CWH03K1025
7 NUT-PROPELLER FAN 1 CWH561036J
8 COMPRESSOR 1 CWB092578
9 ANTI-VIBRATION BUSHING 3 CWH501022
10 NUT-COMPRESSOR MOUNT 3 CWH561047A
11 CONDENSER 1 CWB32C3249PA
12 HOLDER COUPLING ASS'Y 1 CWH351064A
13 2-WAY VALVE 1 CWB021260
14 3-WAY VALVE 1 CWB011323
15 NUT FOR TERMIANL COVER 1 7080300J
16 SOUND PROOF BOARD 1 CWH151080
17 SOUND PROOF MATERIAL 1 CWG302554
18 TUBE ASS'Y(CAPILLARY) 1 CWT01C6062
19 CAPILLARY 1 CWB15053
20 TOP PLATE 1 CWE031044A
21 CABINET FRONT PLATE 1 CWE06K1061
22 CABINET SIDE PLATE (R) 1 CWE04C1310
23 CABINET SIDE PLATE (L) 1 CWE04C1319
24 CONTROL BOX COVER 1 CWH131223
25 CAPACITOR-COMP. 1 DS371306CPXC
26 CAPACITOR-HOLDER 1 CWH301037
27 CAPACITOR-FM 1 DS401205XPQC
28 TERMINAL BOARD ASS'Y 1 CWA28K1176

Packing Materials
29 C.C.CASE 1 CWG567806
30 BASE BOARD-COMPLETE 1 CWG62C1060
31 SHOCK ABSORBER( R ) 1 CWG712478
32 SHOCK ABSORBER( L ) 1 CWG712479
33 SHOCK ABSORBER 1 CWG712514

(Note)

 All parts are supplied from PAPAGZ, China.
 “O” marked parts are recommended to be kept in stock

Printed in CHINA

36