CS-E24NKDS, CS-E28NKDS, CU-E24NKD, CU-E28NKD - Panasonic Air Conditioner Service Manual (repair manual)

cs-e24nkds, cs-e28nkds, cu-e24nkd, cu-e28nkd service manual
Model
CS-E24NKDS CS-E28NKDS CU-E24NKD CU-E28NKD
Pages
107
Size
7.48 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
File
cs-e24nkds-cs-e28nkds-cu-e24nkd-cu-e28nkd.pdf
Date

Read Panasonic CS-E24NKDS / CS-E28NKDS / CU-E24NKD / CU-E28NKD Service Manual online

 
Order No: PHAAM1112081C2 
 
 
 
Indoor Unit 
Outdoor Unit
 
CS-E24NKDS 
CS-E28NKDS 
 
CU-E24NKD
CU-E28NKD
 
 
 
 
 
TABLE OF CONTENTS 
PAGE    
PAGE
1.
  Safety Precautions.............................................3 
2.
  Specification.......................................................5 
3.
  Features ............................................................11 
4.
  Location of Controls and Components .........12 
4.1
 
Indoor Unit..................................................12
 
4.2
 
Outdoor Unit ...............................................12
 
4.3
 
Remote Control ..........................................12
 
5.
  Dimensions.......................................................13 
5.1
 
Indoor Unit & Remote Control ....................13
 
5.2
 
Outdoor Unit ...............................................14
 
6.
  Refrigeration Cycle Diagram...........................15 
7.
  Block Diagram ..................................................16 
8.
  Wiring Connection Diagram............................17 
8.1
 
Indoor Unit..................................................17
 
8.2
 
Outdoor Unit ...............................................18
 
9.
  Electronic Circuit Diagram ..............................20 
9.1
 
Indoor Unit..................................................20
 
9.2
 
Outdoor Unit ...............................................21
 
10.
 Printed Circuit Board .......................................23 
10.1
  Indoor Unit..................................................23 
10.2
  Outdoor Unit...............................................26 
11.
 Installation Instruction.....................................28 
11.1
  Select the Best Location ............................28 
11.2
  Indoor Unit..................................................29 
11.3
  Outdoor Unit...............................................33 
12.
 Operation Control.............................................36 
12.1
  Basic Function............................................36 
12.2
  Airflow Direction .........................................38 
12.3
  Quiet Operation (Cooling Mode/Cooling  
Area of Soft Dry Mode)...............................40
 
12.4
  Powerful Mode Operation ..........................41 
12.5
  Timer Control..............................................41 
 
WARNING 
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. 
 
PRECAUTION OF LOW TEMPERATURE 
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
 
12.6
  Auto Restart Control...................................41 
12.7
  Indication Panel..........................................41 
12.8
  nanoe-G Operation.....................................42 
12.9
  Mild Dry Cooling Operation ........................44 
12.10
  ECONAVI and AUTO COMFORT  
Operation....................................................45
 
13.
 Protection Control............................................49 
13.1
  Protection Control For All Operations.........49 
13.2
  Protection Control For Cooling & Soft Dry  
Operation....................................................51
 
13.3
  Protection Control For Heating  
Operation....................................................52
 
14.
 Servicing Mode.................................................53 
14.1
  Auto OFF/ON Button ..................................53 
14.2
  Remote Control Button...............................54 
15.
 Troubleshooting Guide....................................55 
15.1
  Refrigeration Cycle System........................55 
15.2
  Relationship Between The Condition Of  
The Air Conditioner And Pressure And 
Electric Current...........................................56
 
15.3
  Breakdown Self Diagnosis Function...........57 
15.4
  Error Code Table........................................58 
15.5
  Troubleshooting Flowchart .........................60 
16.
 Disassembly and Assembly Instructions ......88 
16.1
  Indoor Electronic Controllers, Cross  
Flow Fan and Indoor Fan Motor Removal 
Procedures .................................................88
 
16.2
  Outdoor Electronic Controller Removal  
Procedure ...................................................92
 
17.
 Technical Data ..................................................93 
17.1
  Operation Characteristics...........................93 
17.2
  Sensible Capacity Chart.......................... 101 
18.
 Exploded View and Replacement Parts  
List .................................................................. 102
 
18.1
  Indoor Unit ............................................... 102 
18.2
  Outdoor Unit ............................................ 104 
 
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 
This indication shows the possibility of causing death or serious injury. 
   CAUTION 
This indication shows the possibility of causing injury or damage to properties. 
 
  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. 
 
   WARNING 
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 unit. 
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 fire. 
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. Do not use joint cable for indoor / outdoor connection cable. Use the specified indoor / outdoor connection cable, refer to installation 
instruction 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 connecting 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, e.g. 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.) 
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 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. For R410A models, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause 
abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A materials. 
Thickness or copper pipes used with R410A must be more than 0.8 mm. Never use copper pipes thinner than 0.8 mm. It is desirable 
that the amount of residual oil is less than 40 mg/10m. 
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.). 
 
This symbol denotes item that is PROHIBITTED from doing. 
   WARNING 
20. During pump down operation, stop the compressor before remove the refrigerant piping. (Removal of refrigeration piping while compressor is operating 
and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.). 
21. 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. 
22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when refrigerant contacts with fire. 
23. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury. 
24. Must not use other parts except original parts describe in catalog and manual. 
25. Using of refrigerant other than the specified type may cause product damage, burst and injury etc. 
 
 
   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.  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 a power plug. 
   Use an approved 20A (2.5HP) or 25A (3.0HP) 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 20A (2.5HP) or 25A (3.0HP) 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. 
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Here you can read online and download Panasonic CS-E24NKDS / CS-E28NKDS / CU-E24NKD / CU-E28NKD Service Manual in PDF. CS-E24NKDS / CS-E28NKDS / CU-E24NKD / CU-E28NKD service manual will guide through the process and help you recover, restore, fix, disassemble and repair Panasonic CS-E24NKDS / CS-E28NKDS / CU-E24NKD / CU-E28NKD 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.