Panasonic CS-PS9JKT Service Manual page 63

14.4.20 F96 (IPM Overheating)
Malfunction Decision Conditions
During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM 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.
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
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
63