Mitsubishi Electric PUMY-P112VKM3 Technical & Service Manual page 68

Check code
Compressor current interruption (Locked compressor)
4100
(UF)
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Continued from the previous page
Are they connected properly?
Check whether the compressor is faulty
grounded or not.
Is the compressor faulty grounded?
OCH632A
Diagnosis
Yes
Yes
Connect the compressor wiring (U, V and
W phase) properly, then turn the power
No
back ON.
Replace the outdoor power circuit board
No
(Defective outdoor power circuit board).
Replace the compressor (Defective compressor).
68
Chart 2 of 2
Remedy