Mitsubishi Heavy Industries SRK20ZJX-S Service Manual page 54

Current cut
Current safe stop
Compressor lock, Compressor wiring short circuit, Compressor output is open phase,
Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty.
53
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'09•SRK-DB-087D
'10 • SCM-SM-094
Overload operation, compressor
lock, overcharge