Outdoor Unit Error - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

Outdoor unit error

Current safe stop
Compressor overheat
Is discharge pipe (Comp. dome)
thermistor resistance value good?
Is sufficient quantity of refrigerant
circulated?
Is output voltage applied to all 3
phases of power transistor?
YES
Is compressor wiring connected
securely?
YES
Inspect compressor.
Is refrigerant charge quantity adequate?
YES
Is outdoor ventilation condition good?
YES
Inspect compressor.
YES
Defective inverter
NO
YES
NO
YES
Defective inverter
NO
Defective inverter
NO
Connect securely.
[Overload operation, compressor
lock, overcharge]
NO
Discharge refrigerant.
NO
Secure space for suction and blow
out.
[Gas shortage, defective discharge
pipe (Comp. dome) thermistor]
Connector connection check, resistance
value check, replacement of discharge pipe
(Comp. dome) thermistor
NO
Does trouble persist after
charging gas?
YES
Clogged capillary tube,
etc.
SRK-GZ
[Broken power transistor
broken compressor wire]
Gas shortage
41