SiBE01-829 Troubleshooting
Service Diagnosis 49
4.5.2 Room Temperature Thermistor
Remote
Controller
Display
C9
Method of
Malfunction
Detection
The temperatures detected by the room temperature thermistor is used to determine thermistor
error.
Malfunction
Decision
Conditions
When the room temperature thermistor input is more than 5 V, or 0 V during compressor
operation
∗
.
∗
(Reference)
Room temperature thermistor: 30
Ω
or less, or 490k
Ω
or more.
Supposed
Causes
Faulty thermistor
Faulty PCB
Troubleshooting
Check No.06
Refer to P.55
Caution
Be sure to turn off power switch before check the resistance value, or
parts damage may be occurred.
(R8505)
Check No. 06
Check the thermistor resistance
value.
YES
NO
Replace the thermistor.
(Replace the display PCB.)
Replace the indoor unit PCB.
Is it normal?
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