Haier N-Series, Service Manual

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Seivice diagnosis
Domestic air conditioner
11.4.5 IPM protection
Electrify the machine again and turn it on
with the remote controller,If malfunctions
are reported before or upon the compressor
being started up,
IPM Module is damaged and
needs replacing.
1
ǃ
The system may have been over or under charged with gas, which can be judged through the pressure of the
measuring system.
2
ǃ
The shaft of compressor is seized and the compressor needs replacing.
<(6
12
The compressor is started normally, but
malfunctions are reported after it has run for some
time.
Malfunction unsolved
Method of
malfunction
detection
Malfunction
detection
conditions
Troubleshooting
IPM protection is detected by checking the compressor running condition and so on
Ŷ
The system leads to IPM protection due to over current
Ŷ
The compressor faulty leads to IPM protection
Ŷ
circuit component of IPM is broken and led to IPM protection
Ŷ
IPM protection dues to the compressor faulty
Ŷ
IPM protection dues to faulty PCB of IPM module
Ŷ
Compressor wiring disconnected
Supposed
causes
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
.
LED1 flash 2 times Outdoor diplay
36