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

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Domestic air conditioner
HSU-09/12RS03/R2(SDB) Service Diagnosis
7.4.3 IPM protection
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Outdoor display
LED1 flash 2 times
Method of IPM protection is detected by checking the compressor running condition and so on
Malfunction
Detection
Malfunction Ŷ
The system leads to IPM protection due to over current
Decision Ŷ
The compressor faulty leads to IPM protection
Conditions Ŷ
circuit component of IPM is broken and led to IPM protection
Supposed Ŷ
IPM protection dues to the compressor faulty
Causes Ŷ IPM protection dues to faulty PCB of IPM module
Ƶ Compressor wiring disconnected
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
7.4.4 The IPM and outdoor PCB don’t communicate or Related Abnormality
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outdoor display LED1 flash 4 times Indoor Display F3 
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Method of Communication is detected by checking the IPM module and the outdoor PCB
Malfunction
Detection
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Malfunction Ƶ The outdoor PCB broken leads to communication fault
Decision
Ƶ The IPM module broken leads to communication fault
Conditions
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Supposed Ƶ The outdoor PCB is broken 
Causes Ƶ The IPM module is broken
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.
1ᇬThe system may have been over or under charged with gas, which can be judged through the pressure of the
measuring system.
2ᇬThe 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