Panasonic CS-E9SD3UAW Service Manual page 91

15.5.20 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry)
Malfunction Decision Conditions

During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by
the outdoor unit heat exchanger thermistor.
Malfunction Caused

Outdoor heat exchanger temperature rise due to short-circuit of hot discharge air flow.

Outdoor heat exchanger temperature rise due to defective of outdoor fan motor.

Outdoor heat exchange temperature rise due to defective outdoor heat exchanger thermistor.

Outdoor heat exchanger temperature rise due to defective of outdoor unit PCB.
Troubleshooting
When abnormality indication starts again
Check the outdoor unit installation condition
(during cooling or soft dry operation)
Is there any improper heat radiation?
NO
Reset the error code and turn on the unit
again
Is the outdoor fan motor operating?
YES
Check the outdoor heat exchanger
thermistor:
Turn off the power and disconnect the
connector of outdoor heat exchanger
thermistor from the PCB
Measure the resistance of the outdoor
heat exchanger thermistor
Is the measured resistance of the outdoor
heat exchanger thermistor matches the
value specified in its characteristic chart?
YES
Reinstall the outdoor unit
YES
Remove the obstacle(s)
Clean the outdoor heat exchanger
Measure the AC/DC voltage between
NO
pins of connector CN-FM outdoor unit
PCB
Is the voltage supplied to the outdoor
fan motor normal?
YES (240VAC / 265~325VDC)
For safety reason and to prevent component
breakdown, always switch off the power before
Caution
remove and connect the component.
Defect in outdoor heat exchanger
NO
thermistor
Replace the outdoor heat exchanger
themistor
Defect in outdoor unit PCB
Replace the outdoor unit PCB
91
NO (0V)
Defect in outdoor unit PCB
Replace the outdoor unit PCB
Defect in outdoor fan motor
Replace the outdoor fan motor