Midea DLFSHBH18XAK - IPM malfunction or IGBT over-strong current protection (PC00)

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DIAGNOSIS AND SOLUTION (CONT)
IPM malfunction or IGBT over-strong current protection (PC00)
Description: When the IPM sends a voltage signal to the compressor drive chip is abnormal, “PO” appears on the LED and the
air conditioner turns off.
Recommended parts to prepare:
• Wiring mistake
• IPM malfunction
• Faulty outdoor fan assembly
• Compressor malfunction
• Faulty outdoor PCB
Troubleshooting and Repair:
Check the wiring between
the PCB and compressor.
Does an error exist ?
Ensure proper connections or
replace the wires and connectors.
YES
Check the IPM.
NO
Is it in working order ?
Replace the IPM board or
replace the outdoor PCB.
NO
Check the outdoor fan and the
outdoor unit ventilation.
YES
Is it in working order ?
Refer to the Fan Speed is
Out of Control (EH03) solution.
NO
Check the compressor
resistance values.
YES
Are they within
acceptable parameters
?
Replace the compressor.
Replace the outdoor PCB.
YES
NO