CS-C18JKD, CU-C18JKD, CS-C24JKD, CU-C24JKD - Panasonic Air Conditioner Service Manual (repair manual)

cs-c18jkd, cu-c18jkd, cs-c24jkd, cu-c24jkd service manual
4.68 MB
Service Manual
Air Conditioner / AIR CONDITIONER

Read Panasonic CS-C18JKD / CU-C18JKD / CS-C24JKD / CU-C24JKD Service Manual online

Order No. PHAAM0810023C8
Air Conditioner
Indoor Unit   Outdoor Unit
1 Safety Precautions----------------------------------------------- 3
2 Specifications 
----------------------------------------------------- 5
3 Features 
------------------------------------------------------------- 7
4 Location of Controls and Components 
------------------- 8
4.1. Product Overview------------------------------------------ 8
5 Dimensions--------------------------------------------------------- 9
5.1. Indoor Unit & Remote Control -------------------------- 9
5.2. Outdoor Unit -----------------------------------------------10
6 Refrigeration Cycle Diagram --------------------------------11
7 Block Diagram --------------------------------------------------- 12
8 Wiring Connection Diagram
--------------------------------- 13
8.1. CS-C18JKD  CU-C18JKD ----------------------------- 13
8.2. CS-C24JKD  CU-C24JKD ----------------------------- 14
9 Electronic Circuit Diagram----------------------------------- 15
10 Printed Circuit Board ------------------------------------------ 16
10.1. Main Printed Circuit Board----------------------------- 16
10.2. Power Printed Circuit Board--------------------------- 17
10.3. Indicator Printed Circuit Board------------------------ 18
10.4. Receiver Printed Circuit Board ----------------------- 18
10.5. High Voltage Power Supply Printed Circuit
Board -------------------------------------------------------- 18
11 Installation Instruction ---------------------------------------- 19
11.1. Select the Best Location ------------------------------- 19
11.2. Indoor Unit ------------------------------------------------- 20
11.3. Outdoor Unit ----------------------------------------------- 24
12 Operation Control----------------------------------------------- 26
12.1. Cooling Operation---------------------------------------- 26
12.2. Soft Dry Operation --------------------------------------- 27
12.3. Automatic Operation------------------------------------- 28
12.4. Indoor Fan Speed Control ----------------------------- 29
12.5. Outdoor Fan Speed Control --------------------------- 30
12.6. Vertical Airflow Direction Control --------------------- 31
12.7. Horizontal Airflow Direction Control ----------------- 31
12.8. Powerful Operation -------------------------------------- 32
12.9. Quiet Operation------------------------------------------- 32
12.10. Timer Control---------------------------------------------- 32
12.11. Random Auto Restart Control------------------------- 33
12.12. Remote Control Signal Receiving Sound ---------- 33
12.13. Patrol Operation ------------------------------------------ 33
12.14. e-ion Operation ------------------------------------------- 36
13 Protection Control ---------------------------------------------- 39
13.1. Restart Control (Time Delay Safety Control) ------ 39
13.2. 7 Minutes Time Save Control ------------------------- 39
13.3. 60 Seconds Forced Operation ------------------------ 39
13.4. Starting Current Control -------------------------------- 39
13.5. Freeze Prevention Control ----------------------------- 39
13.6. Compressor Reverse Rotation Protection
Control ------------------------------------------------------ 40
13.7. Dew Prevention control --------------------------------- 40
14 Servicing Mode -------------------------------------------------- 41
14.1. Auto OFF/ON Button ------------------------------------ 41
14.2. Remote Control Button --------------------------------- 42
15 Troubleshooting Guide---------------------------------------- 43
15.1. Refrigeration cycle system----------------------------- 43
16 Disassembly and Assembly Instructions --------------- 45
16.1. Indoor Electronic Controllers, Cross Flow Fan
and Indoor Fan Motor Removal Procedures ------ 45
17 Technical Data---------------------------------------------------- 50
17.1. Thermostat Characteristics ---------------------------- 50
17.2. Operation Characteristics ------------------------------ 51
18 Exploded View and Replacement Parts List ----------- 55
18.1. Indoor Unit ------------------------------------------------- 55
18.2. Outdoor UnitCU-C18JKD ------------------------------ 57
18.3. Outdoor UnitCU-C24JKD ------------------------------ 58
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. Do not modify the machine, part, material during repairing service.
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
3. Do not wrench the fasten terminal. Pull it out or insert it straightly.
4. 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.
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
9. This equipment is strongly recommended to install 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. Use the specified cable 3 x 1.5 mm
 (3/4 ~ 1.5HP) or 3 x 2.5 mm
 (2.0 ~ 2.5HP) 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. 
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 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.
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 electric 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 damage or use unspecified power supply cord. Otherwise it will cause fire or electric shock.
17. 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.
18. During pump down operation, stop the compressor before remove the refrigeration piping. When remove piping while valve at open
condition, burst may occur and cause injury.
19. 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.
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.
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 power plug. Use an approved 15/16A (3/4~1.5HP), 16A (2.0HP) or 20A
(2.5HP) 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 (3/4~2.0HP) or 20A (2.5HP)
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, re-installation and during repairing a refrigeration 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 fin, sharp parts may cause injury.
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Here you can read online and download Panasonic CS-C18JKD / CU-C18JKD / CS-C24JKD / CU-C24JKD Service Manual in PDF. CS-C18JKD / CU-C18JKD / CS-C24JKD / CU-C24JKD service manual will guide through the process and help you recover, restore, fix, disassemble and repair Panasonic CS-C18JKD / CU-C18JKD / CS-C24JKD / CU-C24JKD Air Conditioner. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.