Troubleshooting
SiBE04-101
112
Service Diagnosis
4.22
Operation Halt Due to Thermistor Error or Disconnection Detection
Remote Controller
Display
J3, J6, H9
Outdoor unit LED
Display
A
5
1
4
2
4
3
3
4
3
Method of
Malfunction
Detection
Thermistor errors are detected using thermistor input voltage to micro computor. (Thermistor errors are
detected using the temperatures detected by the thermistors.)
Malfunction
Decision
Conditions
When the thermistor input during compressor operation is more than 4.96 V or less than 0.04 V.
∗
Value changes depends on models
Supposed Causes
Faulty connector connection
Faulty thermistor
Faulty PCB
Troubleshooting
Check No.1
Refer to P.119
J3
: Discharge pipe thermistor
J6
: Outdoor unit heat exchanger thermistor
H9
: Outside air thermistor
Correct the connection.
Replace the thermistor.
Replace the outdoor unit P.C.B.
Is it normal?
Check No.1
Thermistor resistance check
Check the connector connection.
YES
YES
Is it normal?
NO
NO
(R1067)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
SiBE04-101.book Page 112 Monday, October 15, 2001 3:08 PM