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33 

•  If gauge needle does not move from 0cmHg (0MPa) to -76cmHg (-0.1MPa), in step 3 above take the following 

measure: 

•  If the leak stops when the piping connections are tightened further, continue working from step 3. 

•  If the leak does not stop when the connections are retightened, repair the location of leak. 

•  Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid 

refrigerant, it may cause frostbite. 

 

1.  Remove the control board cover from the unit by loosening the screw. 
2.  Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 3 

(C9GK, C12GK) x 1.5mm2 flexible cord, type designation 245 IEC 57 or heavier cord. 

 
 
 
 
 
 
 

3.  Secure the cable onto the control board with the holder (clamper). 
4.  Attach the control board cover back to the original position with the screw. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

1.  Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation 

Diagram. Please warp the insulated piping end to prevent water from going inside the piping. 

2.  If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by 

using POLY-E-FOAM with thickness 6mm or above. 

 

Terminals on the indoor unit

1

2

3

Color of wires

Terminals on the outdoor unit

1

2

3

Control board

Control board cover

Power
supply
cord

Indoor
unit A

Indoor
unit B

15A

Breaker

Control board

Power supply cord

 

34 

•  Operation modes which can be selected using the remote control unit: 

o

  Automatic, Cooling, Dry, Heating and e-ion operation mode. 

•  Types of operation modes which can be performed simultaneously 

o

  Cooling operation and Cooling, Dry or e-ion operation 

o

  Heating operation and Heating operation 

•  Types of operation modes which cannot be performed simultaneously 

o

  During cooling operation, heating operation is impossible at another indoor unit in another room. 

o

  The priority is given to cooling operation if the cooling mode is selected first. In another room where heating 

mode is selected afterward, the POWER LED blinks to indicate the heating operation is in standby condition, 
where the fan is stopped hence no discharged air. 

o

  During heating operation, cooling operation is impossible at another indoor unit in another room. 

o

  The priority is given to heating operation if the heating mode is selected first. In another room where cooling 

mode is selected afterward, the POWER LED blinks to indicate the cooling operation is in standby condition, 
where the fan is stopped hence no discharged air. 

•  Operation mode priority control 

o

  The operation mode designated first by the indoor unit has priority. 

o

  If the priority indoor unit stops operation or initiates the fan operation, the priority is transferred to other 

indoor units. 

 
“Waiting” denotes the standby status in which the POWER LED blinks (ON for 2.5 seconds and OFF for 0.5 seconds) 
and the fan is stopped. 

Non Priority Unit (2

nd

 ON) 

ROOM A 

 

   ROOM B 

Cooling Dry Heating e-ion 

Cooling 

C 

 

C 

D 

 

C 

Waiting 

 

C 

E 

 

C 

Dry 

C 

 

D 

D 

 

D 

Waiting 

 

D 

E 

 

D 

Heating 

Waiting 

 

H 

Waiting 

 

H 

H 

 

H 

Stop 

 

H 

Pr

ior

ity Unit (

1

st

 ON) 

e-ion 

C 

 

E 

D 

 

E 

H 

 

Stop 

E 

 

E 

In the e-ion mode, priority is transferred to a non-priority unit. 
Note 

•  C: Cooling operation mode 

•  D: Dry operation mode 

•  H: Heating operation mode 

•  F: e-ion operation mode 
 

35 

Compressor 

 OFF 

2.5°C

-1.5°

Compressor ON 

0.5° 

Intake air temperature 

– Internal setting temp.

Inverter control, which with a microcomputer in determining the most suitable operating mode as time passes, 
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating model, 
the microcomputer maintains the set temperature by measuring temperature of the environment and performing 
temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by the 
microcomputer at indoor unit that judging the condition according to internal setting and intake air temperature. 
 

Once the operation starts, remote control temperature will be taken as base vale for temperature shifting processes. 
These shifting processes are depending on the air conditioner settings and the operation environment. The final 
shifted value will be used as internal setting temperature and it is updated continuously whenever the electrical 
power is supplied to the unit. 

Remote control setting temperature 16°C ~30°C 

↓ 

Auto operation mode shifting 

 ↓ 

Indoor air temperature shifting 

 ↓ 

Outdoor air temperature shifting 

 ↓ 

Powerful mode shifting 

 ↓ 

Setting temperature limit checking  

(Min: 16°C; Max: 33°C) 

 ↓ 

Internal setting temperature 

•  Compressor is OFF when intake air temperature – Internal setting temperature <-1.5°C. 

•  Compressor is ON after waiting for 3 minutes, if the intake air temperature – Internal setting temperature > 

compressor OFF point. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

36 

-2.5°C

-1.5° 

Compressor ON 

2.0° 

Compressor 

 OFF 

Intake air temperature 

– Internal setting temp.

•  Compressor is OFF when intake air temperature – Internal setting temperature <-1.5°C. 

•  Compressor is ON after waiting for 3 minutes, if the intake air temperature – Internal setting temperature > 

compressor OFF point. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

•  Compressor is OFF when intake air temperature – Internal setting temperature >+2.0°C. 

•  Compressor is ON after waiting for 3 minutes, if the intake air temperature – Internal setting temperature < 

compressor OFF point. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Compressor 

 OFF 

2.5°C

-1.5° 

Compressor ON 

0.5° 

Intake air temperature 

– Internal setting temp.