Carrier DHMVHA Service Manual page 28

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DIAGNOSIS AND SOLUTION (CONT.)
IPM Malfunction or IGBT Over-strong Current Protection (PC00)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
Check the wiring between main the
PCB and the compressor.
Check the IPM.
Check the outdoor fan and the
outdoor unit ventilation.
Check the compressor resistance values.
Replace the outdoor main PCB.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
PC00
When the voltage signal, that the IPM sends to the compressor drive chip is abnormal, the display LED
displays P0 and the unit turns off.
Wiring mistake
IPM malfunction
Outdoor fan assembly faulty
Compressor malfunction
Outdoor PCB faulty
No
Yes
Yes
Yes
Correct the connection or replace
Yes
the wires and connectors.
Replace the IPM board or replace
No
the main PCB.
Refer to the
Fan Speed Is Out of Control
No
malfunction solution.
No Replace the compressor.
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