Compressor Drive Malfunction Diagnosis And Solution; Water-Level Alarm Malfunction - Pioneer YN020GMFI22M2D Service Manual

8.4.1.9 Compressor drive malfunction diagnosis and solution

The trouble shooting is same with one of IPM module protection(P0).

Water-level alarm malfunction

8.4.1.10
Malfunction decision
conditions
Supposed causes
diagnosis and solution
If the sampling voltage is not 5V, the LED will display the
failure.
● Wiring mistake
● Water-level switch faulty
● Water pump faulty
● Indoor PCB faulty