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9.2.8 P2 (temperature protection of compressor top) diagnosis and solution.
9.2.9 P4 (inverter compressor drive error) diagnosis and solution.
YES
Replace the outdoor PCB
Replace inverter compressor.
Reconnect and retry
NO
NO
Is the connection of compressor good? Is the
wiring sequence right? The voltage range
proper?
YES
YES
NO,
Charge
refrigerant
Is abnormality the same
after gas charging?
Replace the outdoor PCB.
Reconnect and
retest.
NO
YES
Is protector normal?
NO
NO
Is the connection good?
Refrigerant is blocked(Such as capillary or
welded points of the pipes.
Is refrigerant circulation
volume normal?
Replace the protector.
Does compressor operate?
