Daikin Super Multi Plus D-Series, Service Manual

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Troubleshooting for Outdoor Unit SiEBE18-526
308 Troubleshooting
7.15 Malfunction of Inverter Radiating Fin Temperature Rise
Remote
Controller
Display
L4
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection
Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Decision
Conditions
When the temperature of the inverter radiation fin increases above 99°C.
Supposed
Causes „
Actuation of fin thermal (Actuates above 99°C)
„ Defect of inverter PCB
„ Defect of fin thermistor
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P326.
(Q0436)
Resistance
check of the radiator fin
thermistor
Measure the resistance of the
radiator fin thermistor.
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 PCB
NO
YES
Temperature
of the radiator fin rises.
Actuates at min.
99 °C
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.