L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin; Temperature Rise - Daikin REYQ72 Serveice Manual

SiUS39-602
2.34 " L4 " Outdoor Unit:

Temperature Rise

L4
Remote
Controller
Display
Applicable REYQ72M, 96M
Models
Method of Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Detection
Malfunction When the temperature of the inverter radiation fin increases above 192°F.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
Troubleshooting
Malfunction of Inverter Radiating Fin
Actuation of fin thermal (Actuates above 192°F)
Defect of inverter PC board
Defect of fin thermistor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Temperature
YES
of the radiator fin rises.
Actuates at min.
192 ˚F
NO
Resistance
Abnormal
check of the radiator fin
thermistor
∗1
Normal
NO
Is reset possible?
YES
Troubleshooting by Indication on the Remote Controller
Defect of power unit radiation.
• Intake port is clogged
• Radiator fin is dirty
• Outdoor temperature is high
Replace the thermistor.
Replace the inverter PC board
Reset and operate.
(V2811)
165