Haier AP24DF1HRA Service Manual page 34

11.4.5 IPM protection
Outdoor diplay
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported before or upon the 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.
LED1 flash 2 times
IPM protection is detected by checking the compressor running condition and so on
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
* Caution
NO
is started normally,
.
YES
but
32
Seivice diagnosis
IPM Module is damaged and
needs replacing.
Malfunction unsolved
Domestic air conditioner
or else