Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 216

SCM-HG (2 room)
Outdoor unit e rror
Current safe stop
Is refrigerant charge quantity adequate?
Compressor overheat
Indoor fan motor error
214
Is output voltage applied to all 3
phases of power transistor?
YES
Is compressor wiring connected
securely?
YES
Inspect compressor. (Broken coil
wire)
YES
Is outdoor ventilation condition good?
YES
Inspect compressor.
YES
Defective inverter
Is comp. dome thermistor resistance
value good?
YES
Is sufficient quantity of refrigerant
circulated?
YES
Defective inverter
Is connector connection good?
YES
Is voltage applied to fan motor?
(Between White - Red)
YES
Defective fan motor
NO
Defective inverter
NO
Connect securely.
NO
Discharge refrigerant.
NO
Secure space for inlet and outlet.
Connector connection check, resistance
NO
value check, replacement of comp. dome
thermistor
NO
Does trouble persist after
charging gas?
YES
Clogged capillary tube,
etc.
NO
Correct connector
connection.
NO
Defective indoor unit
PCB
[Broken power transistor,
broken compressor wire]
[Overload operation, compressor
lock, overcharge]
[Gas shortage, defective
comp. dome thermistor]
NO
Gas shortage
[Defective fan motor,
defective indoor PCB]