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User Manual - Page 104

For RYB036GMFILCBD. Also, The document are for others Pioneer models: CB009GMFILCFHD, RB009GMFILCFHD, FB009GMFILCFHD, CB012GMFILCFHD, RB012GMFILCFHD, FB012GMFILCFHD, CB018GMFILCFHD, RB018GMFILCFHD, UB018GMFILCFHD, CB024GMFILCFHD, RB024GMFILCFHD, UB024GMFILCFHD, CB036GMFILCFHD, RB036GMFILCFHD, UB036GMFILCFHD, CB048GMFILCFHD, RB048GMFILCFHD, UB048GMFILCFHD, YN009GMFI22RPD, YN012GMFI22RPD, YN018GMFI22RPD, YN024GMFI22RPD, YN036GMFI17RUD, YN038GMFI17RUD

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101
16.3.10 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:
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