Daikin R407C PLUS - Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor

Si33-105 Troubleshooting (Inverter)
Troubleshooting R407C PLUS Series Heat Recovery System 203
5.8 Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor
Remote
Controller
Display
P4
Supposed
Causes
!
Defect of radiator fin temperature sensor
!
Defect of inverter unit
Troubleshooting
(VF070)
After resetting, restart.
YES
YES
Is the
resistance of thermistor
correct?
Is the resetting possible?
Replace radiation fin thermistor.
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.