Panasonic CS-C18HKQ, CU-C18HKQ, CS-C24HKQ, CU-C24HKQ Service Manual

© 2007 Panasonic HA Air-Conditioning (M) Sdn. Bhd.
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.

Order No. MAC0710041C3

Air Conditioner

Indoor Unit Outdoor Unit
CS-C18HKQ CU-C18HKQ
CS-C24HKQ CU-C24HKQ

TABLE OF CONTENTS

PAG E PAG E

1 Safety Precautions ----------------------------------------------- 3
2 Specifications ----------------------------------------------------- 5

2.1. CS-C18HKQ CU-C18HKQ ------------------------------ 5

2.2. CS-C24HKQ CU-C24HKQ ------------------------------ 7

3Features------------------------------------------------------------- 9
4 Location of Controls and Components ------------------10

4.1. Product Overview-----------------------------------------10

5Dimensions-------------------------------------------------------- 11

5.1. Indoor Unit & Remote Control ------------------------- 11

5.2. Outdoor Unit -----------------------------------------------12

6 Refrigeration Cycle Diagram --------------------------------13
7 Block Diagram ----------------------------------------------------14
8 Wiring Connection Diagram ---------------------------------15

8.1. CS-C18HKQ CU-C18HKQ -----------------------------15

8.2. CS-C24HKQ CU-C24HKQ -----------------------------16

9 Electronic Circuit Diagram -----------------------------------17

10 Printed Circuit Board-------------------------------------------18

10.1. Indoor Unit--------------------------------------------------18

10.2. Power Printed Circuit Board ---------------------------20

10.3. Indicator ---------------------------------------------------- 21

11 Installation Instruction ---------------------------------------- 22

11.1. Select the Best Location ------------------------------- 22

11.2. Indoor Unit ------------------------------------------------- 23

11.3. Outdoor Unit----------------------------------------------- 25

12 Operation Control----------------------------------------------- 28

12.1. Cooling Operation---------------------------------------- 28

12.2. Soft Dry Operation --------------------------------------- 29

12.3. Automatic Operation ------------------------------------ 30

12.4. Indoor Fan Speed Control ----------------------------- 31

12.5. Outdoor Fan Speed Control --------------------------- 32

12.6. Vertical Airflow Direction Control--------------------- 33

12.7. Horizontal Airflow Direction Control ----------------- 33

12.8. Powerful Operation -------------------------------------- 34

12.9. Quiet Operation------------------------------------------- 35

12.10. Timer Control---------------------------------------------- 35

12.11. Random Auto Restart Control ------------------------ 36

12.12. Remote Control Signal Receiving Sound ---------- 36

12.13. Patrol Operation ------------------------------------------ 37

2

12.14. e-ion Operation -------------------------------------------40

13 Protection Control ---------------------------------------------- 43

13.1. Restart Control (Time Delay Safety Control) ------ 43

13.2. 7 Minutes Time Save Control -------------------------43

13.3. 60 Seconds Forced Operation ------------------------ 43

13.4. Starting current Control --------------------------------- 43

13.5. Freeze Prevention Control ----------------------------- 43

13.6. Compressor Reverse Rotation Protection
Control ------------------------------------------------------ 44

13.7. Dew Prevention control --------------------------------- 44

14 Servicing Mode -------------------------------------------------- 45

14.1. Auto OFF/ON Button ------------------------------------ 45

14.2. Select Remote Control Transmission Code ------- 45

14.3. Remote Control Button --------------------------------- 46

15 Troubleshooting Guide---------------------------------------- 47

15.1. Refrigeration cycle system----------------------------- 47

16 Disassembly and Assembly Instructions --------------- 49

16.1. Indoor Electronic Controllers and Control
Board Removal Procedures --------------------------- 49

16.2. Indoor Fan Motor and Cross Flow Fan
Removal Procedures------------------------------------52

17 Technical Data---------------------------------------------------- 54

17.1. Thermostat Characteristics ---------------------------- 54

17.2. Operation Characteristics ------------------------------ 55

18 Exploded View and Replacement Parts List -----------59

18.1. Indoor Unit ------------------------------------------------- 59

18.2. Outdoor Unit ----------------------------------------------- 61

3

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.

• 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.

This symbol denotes item that is PROHIBITED from doing.

1. Engage dealer or specialist for installation and servicing. If installation of servicing 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, electric shock or fire.

3. 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.

4. 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.

5. 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.

6. This equipment is strongly recommended to install with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD).
Shock and fire in case Otherwise, it may cause electrical shock and fire in case equipment breakdown or insulation breakdown.

7. Use the specified cable and connect tightly for indoor/outdoor connection. Connect tightly and 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.

8. 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.

9. 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, explosive and injury.

10. 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.

11. 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 electric shock in case equipment breakdown or insulation breakdown.

12. When connecting the piping, do not allow air or any substances other than the specified refrigerant to enter the refrigeration cycle.
Otherwise, this may lower the capacity, cause abnormally high pressure in the refrigeration cycle, and possibly result in explosion and
injury.

13. Do not damage or use unspecified power supply cord. Otherwise it will cause fire or electric shock.

14. Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical
appliances. Otherwise, it will cause fire or electrical shock.

15. It is desirable that the amount of residual oil is less than 40 mg/10m.

16. During installation, before run the compressor, confirm the refrigerant pipes are fixed. Operation of compressor without fixing the
piping, setting the valves at open condition, a burst may occur and cause injury.

17. After completion of the installation servicing confirm there is no leakage of refrigerant gas. It may generate toxic gas when the
refrigerant contacts with fire.

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

4

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.

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

7. Power supply connection to the 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.

1. Power supply connection to the receptacle using a power plug. Use an approved power plug with earth pin for the connection
to the socket.

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

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

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

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

5

2 Specifications

2.1. CS-C18HKQ CU-C18HKQ

1. Cooling capacities are based on indoor temperature of 27qC D.B. (80.6qF D.B.), 19.0qC W.B. (66.2qF W.B.) and outdoor air
temperature of 35qC D.B. (95qF D.B.), 24qC W.B. (75.2qF W.B.)

Item Unit Indoor unit Outdoor unit

Performance Test Condition NEW JIS
Capacity kW 5.30

BTU/h 18100

*kJ/h 19080

EER W/W 3.06

kJ/hW 11.02

Noise Level dB (A) High: 42 Low: 37 High: 55 / -

Power level dB — —

Moisture Removal l/h 2.9

(pt/h) 6.1

Air Volume Lo

m

3

/m (ft3/m)

12.5 (440) —

Me

m

3

/m (ft3/m)

13.6 (480) —

Hi

m

3

/m (ft3/m)

14.8 (520) 52.5 (1850)

SHi

m

3

/m (ft3/m)

15.4 (543) —

Refrigerant Control Device — Capillary Tube
Refrigerant Oil (Charged)

cm

3

— ATMOS M60 or SUNISO

4GDID (650cm

3

)
Refrigerant (Charged) R22 kg (oz) — 1.33 (46.9)
Dimension Height mm (inch) 275 (10 - 27/32) 750 (29 - 17/32)

Width mm (inch) 998 (39 - 5/16) 875 (34 - 15/32)

Depth mm (inch) 230 (9 - 1/16) 345 (13 - 19/32)
Net Weight kg (lbs) 11 (24) 48 (106)
Pipe Diameter Gas mm (inch) 12.70 (1/2”)

Liquid mm (inch) 6.35 (1/4”)
Height Difference m (ft) 20 (65.6)
Pipe Length Range m (ft) 3 (9.8) - 25 (82.0)
Additional Gas Amount g/m (oz/ft) 20 (0.2)
Refrigeration Charge Less m (ft) 7.5 (24.6)
Drain Hose Inner diameter mm 16 —

Length mm 650 —
Compressor Type — Hermetic motor

Motor Type — Induction (2-poles)

Rated Output W — 1.2k
Fan Type Cross-flow Fan Propeller Fan

Material ASHT-18 PP Resin

Motor Type Transistor (8-poles) Induction (6-poles)

Input power W 47.3 162.8

Output power W 30 69

Fan Speed Lo (Cool) rpm 1150 —

Me (Cool) rpm 1250 —
Hi (Cool) rpm 1360 870
SHi (Cool) rpm 1420 —

Heat Exchanger Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)

Fin Type Slit Fin Slit Fin

Row u Stage u FPI 2 u 15 u 21 2 u 34 u 17

Size (W u H u L) mm 810 u 315 u 25.4 25.4 u 714 u 814.8.:834.8
Air Filter Type Material Polypropelene —

Style One-touch —

6

Note:

• Specification are subject to change without prior notice for further improvement.

Item Unit

Power Source (Phase, Voltage, Cycle) ø Single

V 230

Hz 60
Input power W 1.73k
Starting Current A 47
Running Current Cooling A 7.7
Maximum Current Cooling A 10.6
Power Factor Cooling % 98
Power factor means total figure of compressor, indoor fan motor and outdoor fan motor.
Power Cord Number of core 3 (1.5mm)

Length m (ft) 2 (6)
Thermostat —
Protection Device 2 Stage Overload Protector

7

2.2. CS-C24HKQ CU-C24HKQ

1. Cooling capacities are based on indoor temperature of 27qC D.B. (80.6qF D.B.), 19.0qC W.B. (66.2qF W.B.) and outdoor air
temperature of 35qC D.B. (95qF D.B.), 24qC W.B. (75.2qF W.B.)

Item Unit Indoor unit Outdoor unit

Performance Test Condition NEW JIS
Capacity kW 7.03

BTU/h 24000

*kJ/h 25310

EER W/W 2.72

kJ/hW 9.81

Noise Level dB (A) High: 46 Low: 40 High: 56 / -

Power level dB — —

Moisture Removal l/h 4.0

(pt/h) 8.5

Air Volume Lo

m

3

/m (ft3/m)

13.9 (493) —

Me

m

3

/m (ft3/m)

15.7 (553) —

Hi

m

3

/m (ft3/m)

16.9 (600) 52.5 (1850)

SHi

m

3

/m (ft3/m)

17.9 (632) —

Refrigerant Control Device — Capillary Tube
Refrigerant Oil (Charged)

cm

3

— ATMOS M60 or

SUNISO 4GDID (1130cm

3

)
Refrigerant (Charged) R22 kg (oz) — 1.41 (49.8)
Dimension Height mm (inch) 275 (10 - 27/32) 750 (29 - 17/32)

Width mm (inch) 998 (39 - 5/16) 875 (34 - 15/32)

Depth mm (inch) 230 (9 - 1/16) 345 (13 - 19/32)
Net Weight kg (lbs) 11 (24) 60 (132)
Pipe Diameter Gas mm (inch) 15.88 (5/8”)

Liquid mm (inch) 6.35 (1/4”)
Height Difference m (ft) 20 (65.6)
Pipe Length Range m (ft) 3 (9.8) - 25 (82.0)
Additional Gas Amount g/m (oz/ft) 30 (0.3)
Refrigeration Charge Less m (ft) 7.5 (24.6)
Drain Hose Inner diameter mm 16 —

Length mm 650 —
Compressor Type — Hermetic motor

Motor Type — Induction (2-poles)

Rated Output W — 1.8k
Fan Type Cross-flow Fan Propeller Fan

Material ASHT-18 PP Resin

Motor Type Transistor (8-poles) Induction (6-poles)

Input power W 60 158.6

Output power W 30 72

Fan Speed Lo (Cool) rpm 1240 —

Me (Cool) rpm 1390 —
Hi (Cool) rpm 1500 870
SHi (Cool) rpm 1590 —

Heat Exchanger Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)

Fin Type Slit Fin Slit Fin

Row u Stage u FPI 2 u 15 u 21 2 u 34 u 17

Size (W u H u L) mm 810 u 315 u 25.4 25.4 u 714 u 814.8:834.8
Air Filter Type Material Polypropelene —

Style One-touch —

8

Note:

• Specification are subject to change without prior notice for further improvement.

Item Unit

Power Source (Phase, Voltage, Cycle) ø Single

V 230

Hz 60
Input power kW 2.58
Starting Current A 63
Running Current Cooling A 11.7
Maximum Current Cooling A 14.3
Power Factor Cooling % 96
Power factor means total figure of compressor, indoor fan motor and outdoor fan motor.
Power Cord Number of core 3 (2.5mm)

Length m (ft) 2 (6)
Thermostat Mechanical
Protection Device —

9

3Features

• E-ion Air Purifying System with Patrol Sensor

- Active e-ions are released to catch dust particles and bring them back the large positively charged filter

- Patrol Sensor color changes to indicate the dirt level in the air

• Long Installation Piping

- CS/CU-C18/24HK, long piping up to 25 meter

• Easy to use remote control

• Quality Improvement

- Random auto restart after power failure for safety restart operation

- Gas leakage protection

- Prevent compressor reverse cycle

- Inner protector to protect compressor

- Noise prevention during soft dry operation

- Blue coated condenser for high resistance to corrosion

• Operation Improvement

- Quiet mode to reduce the indoor unit operating sound

- Powerful mode to reach the desired room temperature quickly

- 24-hour timer setting

10

4 Location of Controls and Components

4.1. Product Overview

4.1.1. Indoor Unit

4.1.2. Outdoor Unit

4.1.3. Remote Control

11

5 Dimensions

5.1. Indoor Unit & Remote Control

5.1.1. CS-C18HKQ CS-C24HKQ

12

5.2. Outdoor Unit

5.2.1. CU-C18HKQ CU-C24HKQ

13

6 Refrigeration Cycle Diagram

14

7 Block Diagram

15

8 Wiring Connection Diagram

8.1. CS-C18HKQ CU-C18HKQ

Resistance of Outdoor Fan Motor Windings

Note: Resistance at 20qC of ambient temperature.

Resistance of Compressor Windings

Note: Resistance at 20qC of ambient temperature.

MODEL CU-C18HKQ

CONNECTION CWA951401J

BLUE-YELLOW 59.47 :

YELLOW-RED 60.95 :

MODEL CU-C18HKQ

CONNECTION 2K25S236F6A

C - R 1.505 :
C - S 1.809 :

16

8.2. CS-C24HKQ CU-C24HKQ

Resistance of Outdoor Fan Motor Windings

Note: Resistance at 20qC of ambient temperature.

Resistance of Compressor Windings

Note: Resistance at 20qC of ambient temperature.

MODEL CU-C24HKQ

CONNECTION CWA951399J

BLUE-YELLOW 59.47 :

YELLOW-RED 60.95 :

YELLOW-ORANGE 80.58 :

MODEL CU-C24HKQ

CONNECTION 2J39S236A1A

C - R 0.933 :
C - S 1.584 :

17

9 Electronic Circuit Diagram

18

10 Printed Circuit Board

10.1. Indoor Unit

TOP VIEW

19

BOTTOM VIEW