Haier AS25THMHRA-C Service Manual page 443

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