Ipm Protection - Haier 1U50S2SJ2FA Service Manual

Service diagnosis

10.3.5 IPM protection

/ F1 LED1 flash 2 times
Outdoor display:
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.
38 Domestic air conditioner