Specifications

SiBE04-624 Troubleshooting
Service Diagnosis 199
2.39 Humidification Fan Outlet Thermistor Fault / Abnormal
Heater Temperature
Remote
Controller Display
PH
Outdoor Unit LED
Display
A5 55
Method of
Malfunction
Detection
Detect short circuit and wire breakage of humidification thermistor.
When humidification fan outlet temperature becomes high, this condition is identified as an
abnormal heater temperature fault.
Malfunction
Decision
Conditions
When power is supplied and the thermistor input is 4.90 V or more, or 0.06 V or less.
If the humidification fan outlet temperature is more than 90°C, this condition is identified as
abnormal heater temperature fault.
Supposed
Causes

Short circuit and wire breakage of humidification thermistor

Disconnected connector

Heater has a high power

Thermistor temperature detection error

Defective rotor motor

Defective dehumidification fan motor

Defective heater control part

Defective humidification fan