Daikin FXDQ50NVE [153/218] P4 outdoor unit malfunction of inverter radiating fin temperature rise sensor

Daikin FXKQ32MVE [153/218] P4 outdoor unit malfunction of inverter radiating fin temperature rise sensor
Troubleshooting by Indication on the Remote Controller SiBE39-402
144 Troubleshooting
4.33 P4 Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor
Remote
Controller
Display
P4
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Decision
Conditions
When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
! Malfunction is not decided while the unit operation is continued.
"P4" will be displayed by pressing the inspection button.
Supposed
Causes
! Defect of radiator fin temperature sensor
! Defect of inverter PC board
Troubleshooting
Refer to thermistor resistance / temperature characteristics table on P192.
(V2818)
After resetting, restart.
YES
YES
Is the
resistance of thermistor
correct?
Is the resetting possible?
Replace inverter PC board.
Measure the resistance of
radiation fin thermistor.
NO
Replace inverter PC board.
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.

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