SG-619AHB-01: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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DIAGNOSIS AND SOLUTION (CONT)
IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)
Malfunction Decision Conditions
When the voltage signals, the IPM sends an abnormal message to the compressor drive chip. The display LED displays “P0”and the air
conditioner powers off.
Possible Causes:
• Wiring mistake
• IPM malfunction
• Outdoor fan assembly faulty
• Compressor malfunction
• Outdoor PCB faulty
Troubleshooting
Check the wiring between the main
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 out of Control
Malfunction solution.
Yes
Check the compressor resistance values.
No
Replace the compressor.
Yes
Replace the outdoor main PCB.
