38MBRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25
PC 00 (IPM Malfunction or IGBT Over-Strong Current Protection Diagnosis and Solution)
Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED displays “PC 00” and the air
conditioner turn off.
Recommended parts to prepare:
• Connection wires
• IPM module board
• Outdoor fan assembly
• Compressor
• Outdoor PCB
Troubleshooting and repair:
Check the wiring between
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 ?
Please refer to the solution of the ĀFan
Speed is Out of C ontrolāmalfunction.
NO
Check the compressor
resistance values.
YES
Are they within
acceptable parameters?
Replace the compressor .
Replace the outdoor PCB .
YES
NO
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