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This service information is designed for experienced repair technicians only and is not designed for use by the general public.

 

 

 

 

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

 

O N

O FF

SE T

T IME R

CANCEL

AIR SWING

TEMP

MO DE

SLE E P

FAN SPEED

OFF/ON

OFF/ON

There are special components used in this equipment which are important for safety. These parts are marked by

in the Schematic

Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.

!

  Specifications, designs and contents in this Service Manual are subject to change without notice. 

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PAGE    

PAGE

 

 

 

 

 

 

 

 

4.1

 

Indoor Unit .................................................. 12

 

4.2

 

Outdoor Unit ............................................... 12

 

4.3

 

Remote Control .......................................... 12

 

 

 

5.1

 

Indoor Unit & Remote Control .................... 13

 

5.2

 

Outdoor Unit ............................................... 14

 

 

 

 

 

 

 

8.1

 

Indoor Unit .................................................. 17

 

8.2

 

Outdoor Unit ............................................... 18

 

 

 

9.1

 

Indoor Unit .................................................. 19

 

9.2

 

Outdoor Unit ............................................... 20

 

 

 

10.1

 

Indoor Unit .................................................. 21

 

10.2

 

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

 

 

 

11.1

 

Select the Best Location ............................. 24

 

11.2

 

Indoor Unit .................................................. 25

 

11.3

 

Outdoor Unit ............................................... 30

 

 

 

12.1

 

Basic Function ............................................ 35

 

12.2

 

Indoor Fan Motor Operation ....................... 36

 

12.3

 

Outdoor Fan Motor Operation .................... 37

 

12.4

 

Airflow Direction .......................................... 37

 

12.5

 

Timer Control .............................................. 38

 

12.6

 

Sleep Mode Operation ............................... 39

 

12.7

 

Random Auto Restart Control .................... 39

 

12.8

 

Indication Panel .......................................... 40

 

12.9

 

Quiet Operation (Cooling Mode/Cooling  
Area of Dry Mode) ...................................... 40

 

12.10

 

Quiet Operation (Heating) .......................... 40

 

12.11

 

Powerful Mode Operation ........................... 41

 

 

 

13.1

 

Protection Control for All Operations .......... 42

 

13.2

 

Protection Control for Cooling & Soft Dry 
Operation .................................................... 44

 

13.3

 

Protection Control for Heating  
Operation .................................................... 45

 

 

 

14.1

 

Auto OFF/ON Button .................................. 47

 

14.2

 

Heat Only Operation ................................... 48

 

14.3

 

Remote Control Button ............................... 49

 

 

 

15.1

 

Refrigeration Cycle System ........................52

 

15.2

 

Relationship Between the Condition of the 
Air Conditioner and Pressure and Electric 
Current ........................................................53

 

15.3

 

Breakdown Self Diagnosis Function ...........54

 

15.4

 

Error Codes Table ......................................55

 

15.5

 

Self-diagnosis Method ................................57

 

 

 

16.1

 

Indoor Electronic Controllers,  
Cross Flow Fan and Indoor Fan Motor 
Removal Procedures ..................................85

 

16.2

 

Outdoor Electronic Controller Removal 
Procedure ...................................................90

 

 

 

17.1

 

Cool Mode Performance Data ....................91

 

17.2

 

Heat Mode Performance Data ....................93

 

 

 

18.1

 

Cool Mode Outdoor Air Temperature 
Characteristic ..............................................94

 

18.2

 

Heat Mode Outdoor Air Temperature 
Characteristic ..............................................98

 

18.3

 

Piping Length Correction Factor .............. 102

 

 

 

19.1

 

Indoor Unit ...............................................  103

 

19.2

 

Outdoor Unit ............................................ 108

 

 

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  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: 

 

This symbol denotes item that is PROHIBITED from doing. 

 

  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 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, 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.). 

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 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. 

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 caused suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, 
injury etc). 

4 

20. 

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.) 

21. 

After completion of installation or service, confirm there is no leakage or 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 described in catalog and manual. 

25.  Using of refrigerant other than the specified type may cause product damage, burst and injury etc. 

 

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 room air conditioner. 
Use power supply cord 3 × 1.5 mm² (1.0 ~ 1.5HP) 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 (1.0 ~ 1.5HP) 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 (1.0 ~ 1.5HP) 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, 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 aluminium 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.