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Please file and use this manual together with the service manual for Model No. CU-2E15PBD, CU-2E18PBD,
Order No. PAPAMY1303101CE, Model No. U-3E18JBE, U-4E23JBE, Order No. PHAAM1004141C2 and Model No. CU-4E27PBD,
CU-5E34PBD,  Order No. PAPAMY1304104CE. 

 

 

 

 

 

 

CLOCK

MODE

AIRCONDITIONER

OFF/ON

SET

CHECK

RESET

AC

RC

ON

OFF

SET

CANCEL

1

2

3

TIMER

ECONAVI

NANOE-G

AUTO

COMFORT

QUIET

MODE

TEMP

FANSPEED

AIRSWING

i AUTO-X

iAUTO-X

CLOCK

OFF/ON

CHECK

ON

OFF

SET

CANCEL

1

2

3

TIMER

TEMP

i A

UTO

-X

i A

UTO

-X

 
 

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. 

 

In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.

 

2 

 

 

 

 

 

 

 

 

4.1

 

Indoor Unit .................................................. 39

 

4.2

 

Outdoor Unit ............................................... 39

 

4.3

 

Remote Control .......................................... 39

 

 

 

5.1

 

Indoor Unit .................................................. 40

 

5.2

 

Outdoor Unit ............................................... 42

 

 

 

6.1

 

CU-E7RKD ................................................. 44

 

6.2

 

CU-E9RKD  CU-E12RKD  CU-E15RKD .... 45

 

6.3

 

CU-E18RKD ............................................... 46

 

6.4

 

CU-E24RKD ............................................... 47

 

6.5

 

CU-E28RKD ............................................... 48

 

 

 

7.1

 

CU-E7RKD ................................................. 49

 

7.2

 

CU-E9RKD  CU-E12RKD  CU-E15RKD .... 50

 

7.3

 

CU-E18RKD ............................................... 51

 

7.4

 

CU-E24RKD  CU-E28RKD ......................... 52

 

 

 

8.1

 

Indoor Unit .................................................. 53

 

8.2

 

Outdoor Unit ............................................... 54

 

 

 

9.1

 

Indoor Unit .................................................. 59

 

9.2

 

Outdoor Unit ............................................... 60

 

 

 

10.1

 

Indoor Unit .................................................. 65

 

10.2

 

Outdoor Unit ............................................... 68

 

 

 

11.1

 

Select the Best Location ............................. 72

 

11.2

 

Indoor Unit .................................................. 73

 

11.3

 

Outdoor Unit ............................................... 77

 

 

 

12.1

 

Basic Function ............................................ 81

 

12.2

 

Indoor Fan Motor Operation ....................... 83

 

12.3

 

Outdoor Fan Motor Operation .................... 83

 

12.4

 

Airflow Direction .......................................... 84

 

12.5

 

Quiet operation (Cooling Mode/Cooling 
area of Dry Mode) ....................................... 86

 

12.6

 

Quiet operation (Heating) ........................... 86

 

12.7

 

Timer Control .............................................. 87

 

12.8

 

Auto Restart Control ................................... 87

 

12.9

 

Indication Panel .......................................... 87

 

12.10

 

nanoe-G Operation ..................................... 88

 

12.11

 

In-filter Deactivation Operation ................... 90

 

12.12

 

AUTO COMFORT and ECONAVI 
Operation .................................................... 91

 

 

 

13.1

 

Cooling operation .......................................99

 

13.2

 

Soft Dry Operation ......................................99

 

13.3

 

Heating Operation ......................................99

 

13.4

 

Automatic Operation ................................ 100

 

13.5

 

Indoor Fan Motor Operation ....................  100

 

13.6

 

Auto restart control .................................. 100

 

13.7

 

Indication Panel .......................................  100

 

13.8

 

i-Auto X Operation ...................................  100

 

 

 

14.1

 

Protection Control For All Operations ...... 101

 

14.2

 

Protection Control For Cooling & Soft Dry 
Operation .................................................  103

 

14.3

 

Protection Control For Heating 
Operation .................................................  104

 

 

 

15.1

 

Protection Control For All Operations ...... 105

 

15.2

 

Protection Control For Cooling & Soft Dry 
Operation .................................................  107

 

15.3

 

Protection Control For Heating 
Operation .................................................  108

 

 

 

16.1

 

Auto OFF/ON Button ............................... 109

 

16.2

 

Remote Control Button ............................ 110

 

 

 

17.1

 

Refrigeration Cycle System ..................... 111

 

17.2

 

Breakdown Self Diagnosis Function ........ 113

 

17.3

 

Error Code Table .....................................  114

 

17.4

 

Self-diagnosis Method ............................. 116

 

 

 

18.1

 

CS-E7RKDW  CS-E9RKDW 
CS-E12RKDW  CS-E15RKDW ............... 142

 

18.2

 

CS-E18RKDW  CS-E24RKDW 
CS-E28RKDS ..........................................  146

 

18.3

 

Outdoor Electronic Controller Removal 
Procedure ................................................  150

 

 

 

19.1

 

Cool Mode Performance Data ................. 153

 

19.2

 

Heat Mode Performance Data ................. 155

 

 

 

20.1

 

Cool Mode Outdoor Air Temperature 
Characteristic ...........................................  157

 

20.2

 

Heat Mode Outdoor Air Temperature 
Characteristic ...........................................  164

 

20.3

 

Piping Length Correction Factor .............. 171

 

 

 

21.1

 

Indoor Unit ...............................................  174

 

21.2

 

Outdoor Unit ............................................ 184

 

 

3 

  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. 

 

 

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

 

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. 

 

 

1.  

Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit on veranda of a high rise building, child may 
climb up to outdoor unit and cross over the handrail causing an accident. 

 

2. 

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. 

 

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

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

 

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

 

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

7. 

When installing or relocating 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.

 

8.  Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc. 

9. 

• For R410A model, use piping, flare nut and tools which is specified for R410A refrigerant. Using of existing (R22) piping, flare nut and tools
  may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury. 
• 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 less than 40 mg/10 m. 

10. 

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

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

12. 

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

13. 

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

14. 

For electrical work, follow the local national wiring standard, regulation and this 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. 

15. 

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 have impact on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection. 

16. 

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. 

17. 

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 of equipment breakdown or insulation breakdown. 

18. 

During installation, install the refrigerant piping properly before running the compressor. Operation of compressor without fixing refrigeration 
piping and valves at opened position will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.

19. 

During pump down operation, stop the compressor before removing 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. 

This symbol denotes item that is PROHIBITED from doing. 

4 

 

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.  After completion of installation, 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 the refrigerant contacts with fire. 

23.  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 of equipment breakdown or insulation breakdown. 

 
 

 

1.  

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

 

2. 

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

 

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

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

 

5. 

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

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

7. 

Power supply connection to the room air conditioner. 
Use power supply cord 3 x 1.5 mm

2

 (3/4 ~ 1.75HP), 3 x 2.5 mm

2

 (2.0 ~ 2.5HP) or 3 x 4.0 mm

2

 (3.0HP) type designation 60245 IEC 57 or 

heavier cord. 
Connect the power supply cord of the air conditioner to the mains using one of the following method. 
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 power plug. 
     Use an approved 15/16A (3/4~1.75HP), 16A (2.0HP), 20A (2.5HP) or 25A (3.0HP) power plug with earth pin for the connection to the 
     socket. 
2)  Power supply connection to a circuit breaker for the permanent connection. 
     Use an approved 16A (3/4~2.0HP), 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. 

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