Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noise, vibration,
operating status, etc. of the
compressor.
Check the power supply voltage.
Turn the power ON, and then operate
the test operation.
Go to the other troubleshooting.
Normal operation.
NO
NO
YES
YES
YES
Replace the outdoor unit PCB.
NO
Correct the power supply.
YES
NO
CHECK 4
A
Continuity check in the power
transistor (IGBT). Is the
continuity normal?
Error is displayed again?
Is instantaneous
voltage drop generated?
Continue the
operation normally.
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