Panasonic CS-CZ25ZKE Service Manual page 113

17.5.25 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 pipe temperature rise due to short-circuit of hot discharge air flow.

Outdoor pipe temperature rise due to defective of outdoor fan motor.

Outdoor pipe temperature rise due to defective outdoor pipe temperature sensor.

Outdoor pipe temperature rise due to defective 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
For safety reason and to prevent
component breakdown, always switch
Caution
off the power before remove and
connect the component.
● 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?
● Defect in outdoor heat exchanger
thermistor
NO
● Replace the outdoor heat exchanger
thermistor
● Defect in outdoor unit PCB
● Replace the outdoor unit PCB
113
NO (0V)
YES (240VAC / 265~325VDC)
● Defect in outdoor unit PCB
● Replace the outdoor unit PCB
● Defect in outdoor fan motor
● Replace the outdoor fan motor