Malfunction Of Inverter Radiating Fin Temperature Rise Sensor - Daikin Super Multi Plus D-Series Service Manual

Troubleshooting for Outdoor Unit
7.20 Malfunction of Inverter Radiating Fin Temperature Rise
Sensor
P4
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction
Detection
Malfunction
When the resistance value of thermistor becomes a value equivalent to open or short circuited
Decision status.
Conditions
Supposed
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P326.
314
Malfunction is not decided while the unit operation is continued.
"P4" will be displayed by pressing the inspection button.
Defect of radiator fin temperature sensor
Defect of inverter PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Measure the resistance of
radiation fin thermistor.
Is the
resistance of thermistor
correct?
YES
Is the resetting possible?
YES
NO
NO
SiEBE18-526
Replace inverter PCB.
Replace inverter PCB.
After resetting, restart.
(Q0440)
Troubleshooting