227
Outdoor unit e
rror
[Broken power transistor,
broken compressor wire]
Is output voltage applied to all 3
phases of power transistor?
YES
YES
NO
NO
Inspect compressor. (Broken coil
wire)
Is compressor wiring connected
securely?
Connect securely.
Current safe stop
[Overload operation, compressor
lock, overcharge]
Defective inverter
Secure space for inlet and outlet.
Discharge refrigerant.
Is refrigerant charge quantity adequate?
Is outdoor ventilation condition good?
Inspect compressor.
Defective inverter
YES
YES
NO
NO
YES
Compressor overheat
[Gas shortage, defective
comp. dome thermistor]
Is comp. dome thermistor resistance
value good?
Is sufficient quantity of refrigerant
circulated?
Defective inverter
YES
YES
NO
NO
YES
NO
Gas shortage
Connector connection check, resistance
value check, replacement of comp. dome
thermistor
Does trouble persist after
charging gas?
Clogged capillary tube,
etc.
Indoor fan motor error
[Defective fan motor,
defective indoor PCB]
YES
YES
NO
NO
Is connector connection good?
Is voltage applied to fan motor?
(Between White - Red)
Defective fan motor
Correct connector
connection.
Defective indoor unit
PCB
