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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
Reinstall the outdoor unit
Remove the obstacle(s)
Clean the outdoor heat exchanger
Defect in outdoor unit PCB
Replace the outdoor unit PCB
Defect in outdoor unit PCB
Replace the outdoor unit PCB
Defect in outdoor fan motor
Replace the outdoor fan motor
Defect in outdoor heat exchanger
thermistor
Replace the outdoor heat exchanger
themistor
When abnormality indication starts again
Check the outdoor unit installation condition
(during cooling or soft dry operation)
Reset the error code and turn on the unit
again
Measure the AC/DC voltage between
pins of connector CN-FM outdoor unit
PCB
Is the voltage supplied to the outdoor
fan motor normal?
Is there any improper heat radiation?
Is the outdoor fan motor operating?
Is the measured resistance of the outdoor
heat exchanger thermistor matches the
value specified in its characteristic chart?
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
YES
YES
YES
NO
NO (0V)
YES (240VAC / 265~325VDC)
NO
NO
For safety reason and to prevent component
breakdown, always switch off the power before
remove and connect the component.
Caution