Panasonic CU-YC24MKV, CU-YC18MKV, CS-YC24MKV, CS-YC18MKV User Manual

Order No. PHAAM1101059C3

Air Conditioner

Indoor Unit Outdoor Unit CS-YC18MKV CS-YC24MKV

CU-YC18MKV CU-YC24MKV

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 product or products dealt with in this service information by anyone else could result in serious injury or death.

WARNING

TABLE OF CONTENTS

PAGE PAGE

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

2. Specifications .....................................................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 & Remote Control........................8

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

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

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

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

7.1 CS-YC18MKV CU-YC18MKV......................12

7.2 CS-YC24MKV CU-YC24MKV......................13

8. Electronic Circuit Diagram ..............................14

9. Printed Circuit Board .......................................15

15.1 Small Air Filter, Indoor Electronic Controllers and Control Board Removal

Procedures.................................................. 36

15.2 To Remove Cross Flow Fan and Indoor Fan

Motor........................................................... 39

16. Technical Data ................................................. 41

16.1 Thermostat Characteristics ......................... 41

16.2 Operation Characteristics ........................... 42

17. Exploded View and Replacement Parts

List .................................................................... 46

17.1 Indoor Unit .................................................. 46

17.2 Outdoor Unit................................................ 48

9.1 Indoor Unit ...................................................15

10. Installation Instruction .....................................17

10.1 Select the Best Location ..............................17

10.2 Indoor Unit ...................................................18

10.3 Outdoor Unit.................................................23

11. Operation and Control .....................................27

11.1 Cooling Operation........................................27

11.2 Indoor Fan Speed Control ...........................28

11.3 Outdoor Fan Speed Control.........................29

11.4 Vertical Airflow Direction Control .................29

11.5 Horizontal Airflow Direction Control .............30

11.6 Timer Control ...............................................30

11.7 Random Auto Restart Control......................30

11.8 Remote Control Signal Receiving Sound ....30

12. Protection Control ............................................31

12.1 Restart Control (Time Delay Safety

Control) ........................................................31

12.2 7 Minutes Time Save Control ......................31

12.3 60 Seconds Forced Operation.....................31

12.4 Starting current Control................................31

12.5 Freeze Preventive Control ...........................31

12.6 Compressor Reverse Rotation Protection

Control .........................................................32

12.7 Dew Prevention Control...............................32

12.8 Odor Cut Control..........................................32

13. Servicing Mode .................................................33

13.1 Auto OFF/ON Button....................................33

13.2 Remote Control Number Switch ..................33

14. Troubleshooting Guide ....................................34

14.1 Refrigeration Cycle System .........................34

15. Disassembly and Assembly Instructions ......36

1. Safety Precautions

 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 running 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.

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

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

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

This symbol denotes item that is PROHIBITED from doing.

WARNING

2. If wiring unit is supplied as repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit.

3. Do not wrench the fasten terminal. Pull it out or insert it straightly.

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

5. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electric shock or fire.

6. Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock.

7. Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly done, the set will drop and cause injury.

8. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.

9. 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.

10. Do not use joint cable for indoor / outdoor connection cable. Use 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.

11. 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 heat-up or fire at the connection point of terminal, fire or electrical shock.

12. When install or relocate air conditioner, do not let any substance other than the specified refrigerant, eg. air etc. mix into refrigerant cycle (piping). (Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).

13. 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.

14. 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.

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

16. Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single outlet with other electrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.

17. 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.

18. During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of compressor 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.).

19. During installation, install the refrigerant piping properly before run 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.).

20. 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.

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

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

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

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. 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.

4. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.

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

WARNING

CAUTION

6. Pb free solder has a higher melting point than standard solder; typically the melting point is 50°F – 70°F (30°C – 40°C) higher. Please use a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). Pb free solder will tend to splash when heated too high (about 1100°F / 600°C).

7. 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 shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries, permanent connection of this room air conditioner to the power supply is prohibited. i. Power supply connection to the receptacle using a power plug. Use an approved 15/16A (3/4~1.5 HP) or 16A (2.0 HP) or 20A (2.5 HP) power plug with earth pin for the connection to the socket. ii. Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A (1.5~2.0 HP) or 20A (2.5 HP) circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.0 mm contact gap.

8. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts. Take care of the liquid refrigerant, it may cause frostbite.

9. Installation or servicing work: It may need two people to carry out the installation or servicing work.

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

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

12. Do not touch the sharp aluminum fins or edges of metal parts. If you are required to handle sharp parts during installation or servicing, please wear hand glove. Sharp parts may cause injury.

2. Specifications

Model

Performance Test Condition NEW JIS NEW JIS

Power Supply

Capacity

Running Current A 8.4 12.0

Input Power W 1.80k 2.58k

EER

Cooling

Power Factor % 97 98

Indoor Noise

Outdoor Noise

Max Current (A) / Max Input Power (W) 9.6 / 2.16k 14.1 / 3.08k

Starting Current (A) 38.0 60.0

Type

Compressor

Type Cross-flow Fan Cross-flow Fan

Material ASG30K1 ASG30K1

Motor Type Transistor (8-poles) Transistor (8-poles)

Input Power W 94.8 94.8

Output Power W 40 40

Indoor Fan

Speed

Type Propeller Fan Propeller Fan

Material PP PP

Motor Type Induction (6-poles) Induction (6-poles)

Input Power W 86.8 162.8

Output Power W 30 79

Outdoor Fan

Speed

Moisture Removal L/h (Pt/h) 2.7 (5.7) 3.8 (8.0)

Indoor Airflow

Outdoor Airflow

Refrigeration Cycle

Motor Type Induction (2-poles) Induction (2-poles)

Output Power W 1.2k 1.8k

Lo rpm 1060 1150

Me rpm 1150 1240

Hi rpm 1240 1390

SHi rpm — —

Lo rpm — 490

Hi rpm 800 820

Lo m3/min. (ft3/min.) 13.8 (489) 15.5 (546)

Me m3/min. (ft3/min.) 15.0 (530) 16.7 (589)

Hi m3/min. (ft3/min.) 16.2 (572) 18.7 (660)

SHi m

Lo m3/min. (ft3/min.) — 30.5 (1076)

Hi m

Control Device Capillary Tube Capillary Tube

Refrigerant Oil cm3

Refrigerant Type g (oz) R22, 1.00k (35.3) R22, 1.41k (49.8)

Indoor CS-YC18MKV CS-YC24MKV

Outdoor CU-YC18MKV CU-YC24MKV

Phase, Hz Single, 60 Single, 60

V 220 220

kW 4.98 6.74

BTU/h 17000 23000

kJ/h 17930 24260

W/W 2.77 2.61

BTU/hW 9.44 8.91

dB-A High: 43; Low: 39 High: 47; Low: 42

Power Level dB — —

dB-A High: 54 Low: – High: 60 Low: –

Power Level dB — —

Rotary (1 cylinder) rolling

piston type

/min. (ft3/min.) — —

/min. (ft3/min.) 30.4 (1073) 51.0 (1800)

ATMOS NM56M or

SUNISO 4GDID

(650 cm

)

Rotary (1 cylinder) rolling

piston type

ATMOS NM56M or

SUNISO 4GDID

(1130 cm3)

Model

Height (I/D / O/D) mm (inch)

Dimension

Weight Net (I/D / O/D) kg (lb) 12 (26) / 35 (77) 12 (26) / 56 (123)

Pipe Diameter (Liquid / Gas) mm (inch)

Standard length m (ft) 5.0 (16.4) 5.0 (16.4)

Length range (min~max) m (ft) 3 ~ 25 (9.8 ~ 82.0) 3 ~ 25 (9.8 ~ 82.0)

I/D & O/D Height different m (ft) 20 (65.6) 20 (65.6)

Piping

Additional Gas Amount g/m (oz/ft) 20 (0.2) 30 (0.3)

Length for Additional Gas m (ft) 7.5 (24.6) 7.5 (24.6)

Drain Hose

Indoor Heat Exchanger

Outdoor Heat Exchanger

Air Filter

Power Supply Indoor Power Supply Indoor Power Supply

Power Supply Cord A 16 20

Thermostat — Mechanical

Protection Device Overload Protector —

Dry Bulb Wet Bulb Dry Bulb Wet Bulb

Indoor Operation Range

Outdoor Operation Range

Width (I/D / O/D) mm (inch)

Depth (I/D / O/D) mm (inch)

Inner Diameter mm 15 15

Length mm 650 650

Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)

Fin Type Slit Fin Slit Fin

Row× Stage× FPI

Size (W × H × L) mm 810 × 315 × 25.4 810 × 315 × 25.4

Fin material Aluminium (Blue Coat) Aluminium (Blue Coat)

Fin Type Slit Fin Slit Fin

Row × Stage × FPI 2 × 24 × 17 2 × 34 × 17

Size (W × H × L) mm

Material Polypropelene Polypropelene

Type One-touch One-touch

Indoor CS-YC18MKV CS-YC24MKV

Outdoor CU-YC18MKV CU-YC24MKV

290 (11-7/16) /

540 (21-1/4)

1070 (42-5/32) /

780 (30-23/32) 220 (8-11/16) /

289 (11-3/8)

6.35 (1/4") /

12.70 (1/2")

2 × 15 × 21 2 × 15 × 21

25.4 × 504 × 693.4

713.4

Maximum 32 23 32 23

Minimum 16 11 16 11

Maximum 43 26 43 26

Minimum 16 11 16 11

290 (11-7/16) / 750 (29-17/32)

1070 (42-5/32) /

875 (34-15/32) 220 (8-11/16) / 345 (13-19/32)

6.35 (1/4") /

15.88 (5/8")

25.4 × 714 × 806.4

826.4

Note:

 Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb

(66.2°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).

 Specification are subjected to change without prior notice for further improvement.

3. Location of Controls and Components

3.1 Indoor Unit

3.2 Outdoor Unit

3.3 Remote Control

4. Dimensions

4.1 Indoor Unit & Remote Control

4.2 Outdoor Unit

4.2.1 CU-YC18MKV

4.2.2 CU-YC24MKV

5. Refrigeration Cycle Diagram

6. Block Diagram

7. Wiring Connection Diagram

7.1 CS-YC18MKV CU-YC18MKV

Resistance of Outdoor Fan Motor Windings

MODEL CU-YC18MKV

CONNECTION CWA951329J

YELLOW- BLUE 258.3 Ω

YELLOW-RED 245.9 Ω

Note: Resistance at 20°C of ambient temperature.

Resistance of Compressor Windings

MODEL CU-YC18MKV

CONNECTION 2KS252F5AB04

C - R 1.959 Ω

C - S 3.083 Ω

Note: Resistance at 20°C of ambient temperature.

7.2 CS-YC24MKV CU-YC24MKV

Resistance of Outdoor Fan Motor Windings

MODEL CU-YC24MKV

CONNECTION CWA951399J

YELLOW-BLUE 59.47 Ω

YELLOW-ORANGE 80.58 Ω

YELLOW-RED 60.95 Ω

Note: Resistance at 20°C of ambient temperature.

Resistance of Compressor Windings

MODEL CU-YC24MKV

CONNECTION 2JS386F3AA04

C – R 1.048 Ω

C - S 1.785 Ω

Note: Resistance at 20°C of ambient temperature.

8. Electronic Circuit Diagram

9. Printed Circuit Board

9.1 Indoor Unit

9.1.1 Main Printed Circuit Board

9.1.2 Indicator Printed Circuit Board

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