Ipm Protection - Haier HSU-09RS03/R2(SDB) Service Manual

7.4.3 IPM protection

Outdoor display
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,
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported
compressor being started up,
The compressor
malfunctions are reported after it has run for
some time.
1 The system may have been over or under charged with gas, which can be judged through the pressure of the
measuring system.
2 The shaft of compressor is seized and the compressor needs replacing.
7.4.4 The IPM and outdoor PCB don't communicate or Related Abnormality
outdoor display LED1 flash 4 times
Method of Communication is detected by checking the IPM module and the outdoor PCB
Malfunction
Detection
Malfunction The outdoor PCB broken leads to communication fault
Decision The IPM module broken leads to communication fault
Conditions
Supposed The outdoor PCB is broken
Causes The IPM module is broken
HSU-09/12RS03/R2(SDB)
else parts damage may be occurred.
before or upon the
is started normally, but
Indoor Display
56
IPM Module is damaged and
needs replacing.
Malfunction unsolved
F3
Service Diagnosis
or
Domestic air conditioner