Panasonic WH-ADF0309J3E5CM Service Manual page 276

25.2.29 IPM Overheating (F96 / P07 / F22)
Malfunction Decision Conditions

During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature
sensor.
Multi Models only
Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated.
o
Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is
o
detected by the heat sink temperature sensor.
Malfunction Caused

IPM overheats due to short circuit of hot discharge air flow.

IPM overheats due to defective of outdoor fan motor.

IPM overheats due to defective of internal circuitry of IPM.

IPM overheats due to defective IPM temperature sensor.
Multi Models Only
Compressor OL connector poor contact.
o
Compressor OL faulty.
o
Troubleshooting
When F96 indication happens
Check the outdoor unit installation
condition (during cooling or soft-dry
operation
Is there any improper heat radiation?
Is outdoor fan motor operating?
YES
NO
NO
YES
For safety reason and to prevent component
breakdown, always switch off the power
Caution
before remove and connect the component.
● Reinstall the outdoor unit
● Remove the obstacle(s)
● Clean the outdoor heat exchanger
● Replace the outdoor fan motor.
● Defect in IPM
● Replace the outdoor unit PCB
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