Daikin R407C PLUS - Troubleshooting (Inverter); Outdoor Unit: Malfunction of Inverter; Radiating Fin Temperature Rise

Si33-105 Troubleshooting (Inverter)
Troubleshooting R407C PLUS Series Heat Recovery System 195
5. Troubleshooting (Inverter)
5.1 Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
Remote
Controller
Display
L4
Supposed
Causes
!
Actuation of fin thermal (Actuates at min. 90°C and resets at max. 80°C)
!
Defect of inverter PC board
!
Defect of fin thermistor
Troubleshooting
(VF063)
Characteristic
check of the radiator fin
thermistor (Refer to thermistor
characteristics
table.)
Defect of power unit radiation.
• Intake port is clogged
• Radiator fin is dirty
• Outdoor temperature is high
NO
Replace the thermistor.
YES
Abnormal
Is reset possible?
Reset and operate.
Normal
Replace the inverter unit.
NO
YES
Temperature
of the radiator fin rises.
Actuates at min. 90 ˚C
Resets at max.
80 ˚C
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.