Haier 1U25BEEFRA Service Manual page 40

10.3.5 IPM protection
Outdoor display:
Method of IPM protection is detected by checking the compressor running condition and so on
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
/ F1 LED1 flash 2 times
The system leads to IPM protection due to over current
The compressor faulty leads to IPM protection
circuit component of IPM is broken and led to IPM protection
IPM protection dues to the compressor faulty
IPM protection dues to faulty PCB of IPM module
Compressor wiring disconnected
else parts damage may be occurred.
Domestic air conditioner
38
Service diagnosis
or