SiUS39-601 Troubleshooting by Indication on the Remote Controller
Troubleshooting 161
2.33
“L4”
Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
Remote
Controller
Display
L4
Applicable
Models
RXYQ72M, 96M
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 192°F.
Supposed
Causes
Actuation of fin thermal (Actuates above 192°F)
Defect of inverter PC board
Defect of fin thermistor
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P239.
(V2811)
Resistance
check of the radiator fin
thermistor
*
1
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 PC board
NO
YES
Temperature
of the radiator fin rises.
Actuates at min.
192 ˚F
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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