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Midea MCHSU-24PHH2

Midea MCHSU-24PHH2
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9.3.10 Inverter compressor drive error diagnosis and solution(P4)
Error Code
P4
Malfunction decision
conditions
An abnormal inverter compressor drive is detected by a special
detection circuit, including communication signal detection,
voltage detection, compressor rotation speed signal detection
and so on.
Supposed causes
Wiring mistake
IPM malfunction
Outdoor fan ass’y faulty
Compressor malfunction
Outdoor PCB faulty
Trouble shooting:
For 9K~18K:

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