Specifications

Troubleshooting SiBE04-624
180 Service Diagnosis
2.29 Thermistor System Fault
Remote
Controller Display
P4, J3, J6, H9
Outdoor Unit LED
Display
A5 5 -
Method of
Malfunction
Detection
This fault is identified based on the thermistor input voltage to the microcomputer.
A thermistor fault is identified based on the temperature detected by each thermistor.
Malfunction
Decision
Conditions
When power is supplied and the thermistor input is 4.98 V or more
or when the thermistor input is 0.02 V or less for 5 sec. continuously
For J3,
“Discharge pipe thermistor < heat exchanger thermistor” is take into consideration to identify the
fault.
Supposed
Causes

Improper connection of connector

Defective thermistor

Defective indoor unit PCB

For J3, defective heat exchanger thermistor
(Cooling: outdoor heat exchanger thermistor, heating: indoor heat exchanger thermistor)