Panasonic WH-MHF09G3E5 Service Manual page 108

16.5.24 IPM Overheating (F22)
Malfunction Decision Conditions:
During operation of heating, when temperature 95°C is detected by the outdoor IPM temperature sensor.
Malfunction Caused:
1 Faulty outdoor unit fan motor.
2 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue 3 times in 30 minutes.
Troubleshooting:
Check the outdoor unit
installation condition.
Is there any improper heat
radiation?
No
Is the outdoor unit
fan motor operating?
Yes
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Yes
- Reinstall the outdoor unit.
- Remove the obstacle(s).
No
Replace the outdoor unit
fan motor.
- Defect in IPM.
- Replace the outdoor unit
PCB (main).
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