:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
34
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
