Carrier DHMVHA - IPM and IGBT Protection; IPM Malfunction;IGBT Over-Current (PC00)

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DIAGNOSIS AND SOLUTION (CONT.)
IPM Malfunction or IGBT Over-strong Current Protection (PC00)
Troubleshooting
Error Code PC00
Malfunction decision conditions
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.
Supposed causes
Wiring mistake
IPM malfunction
Outdoor fan assembly faulty
Compressor malfunction
Outdoor PCB faulty
Check the wiring between main the
PCB and the compressor.
Correct the connection or replace
the wires and connectors.
Yes
No
Check the IPM. No
Yes
Replace the IPM board or replace
the main PCB.
Check the outdoor fan and the
outdoor unit ventilation.
No
Refer to the
Fan Speed Is Out of Control
malfunction solution.
Yes
Check the compressor resistance values.
No
Replace the compressor.
Yes
Replace the outdoor main PCB.