COMFORT-AIRE A-DVC09SF-0, Руководство по обслуживанию

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Service Manual - DVC 09/12/18/24 SF Series
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8.2. 8 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)
Error Code
P0
Malfunction conditions When the voltage signal that IPM send s to compressor drive chip
is abnormal, the display LED will show “P0” and AC will turn off.
Possible causes
●
Wiring error
●
IPM malfunction
●
Outdoor fan ass embl y faulty
●
Compressor malfunction
●
Outdoor PCB faulty
Troubleshooting:
For 9K~24K:
Check the wiring between main PCB
and compressor. Are the wires or
connectors broken?
Correct the connection or replace
the wires and connectors.
Yes
No
IPM continuity check. Are the IPM
terminal resistance values uniform ?
Replace the IPM board or replace the
main PCB if the IPM board and main
PCB are integrated together.
No
Check if the outdoor fan runs
properly or the outdoor unit
ventilation is good.
Yes
No
Please refer to the solution of
【
Fan Speed Has Been
Out Of Control
】
malfunction
Yes
Check if the compressor resistance
values are uniform .
No Replace the compressor.
Yes
Replace the outdoor main PCB if the
main PCB and IPM are separate.