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9.2.5 IGBT over-strong current protection diagnosis and solution.
9.2.6 Over voltage or too low voltage protection diagnosis and solution.
9.2.7 High temperature protection of compressor top diagnosis and solution.
Yes
Yes
No,
Charge refrigerant
Is abnormality the same
after gas charging?
Replace the outdoor PCB.
No
Yes
Is protector normal?
No
No
Is the connection good?
There is block(Such as capillary or
welded points of the pipes.)
Is refrigerant circulation
volume normal?
Replace it
Reconnect it
Does compressor operate?
Is the power supply good?
Replace the outdoor e-box.
Make sure the power supply is normal.
Yes
No
Yes
Fastening the IPM to the radiator
No
Check whether the connections between
outdoor PCB and IPM are good?
Check whether the IPM is fixed to radiator
tightly
Replae the IPM
The unit does not work normally
Replace the compressor
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