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3.2.16 P9---The compressor driving protection (the compressor load abnormal)
P9 The compressor driving protection (the compressor load abnormal)
When compressor starts up or in the process of operation, if:
(1). MCU can't test the feedback signal from compressor, or
(2). Tested a abnormal signal from compressor, or
(3). The compressor startup abnormal.
The outdoor unit will shut off, and show P9 protection.
(The unit will re-startup 6 times continuously, if it still can't work normal, then show P9
code)
40
TROUBLESHOOTING
Display P9
Is the compressor
wires U/V/W
sequence correct?
Yes
Starts up the unit less than
3 minutes while it stopped?
No
The compressor stops at
once while it starts up
Replace Main PCB
End
No
Re-correct wires
Normal protection as the
Yes
High pressure and Low
pressure not balance.
Re-start after
3minutes
Yes
Still P9?
No
Yes
Still P9?
No
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