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105 

When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to 
determine sensor error. 

 
Malfunction Caused: 

1  Faulty connector connection. 
2  Faulty sensor. 
3  Faulty indoor unit PCB (main). 

 
Abnormality Judgment: 

Continue for 5 seconds. 

 
 

106 

During standby and operation of cooling and heating, indoor-control panel error occur. 

 
Malfunction Caused: 

1  Faulty connector connection. 
2  Faulty control panel. 
3  Faulty indoor unit PCB (main). 

 

 

107 

During operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is 
checked whether it is normal. 

1  Faulty outdoor unit PCB (main). 
2  Faulty indoor unit PCB (main). 
3  Indoor-outdoor signal transmission error due to wrong wiring. 
4  Indoor-outdoor signal transmission error due to breaking of wire in the connection wires between the indoor 

and outdoor units. 

5  Indoor-outdoor signal transmission error due to disturbed power supply waveform. 

Continue for 1 minute after operation. 

108 

During operation of tank booster heater, and tank booster heater OLP open circuit. 

1  Faulty connector connection. 
2  Faulty tank booster heater overload protector (OLP). 
3  Faulty indoor unit PCB (main). 

Continue for 60 seconds.