Troubleshooting SiBE12-908
165 Service Diagnosis
2.37 Humidifying Fan Outlet Thermistor Abnormality / Heater
Temperature Abnormality
Remote
Controller Display
PH
Method of
Malfunction
Detection
Detect short circuit and wire breakage of humidification thermistor.
When humidifying 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 4.92 V or more, or 0.06 V or less.
If the humidifying 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 humidifying thermistor
Disconnected connector
Heater has a high power
Thermistor temperature detection error
Defective rotor motor
Defective hygroscopic fan motor
Defective heater control part
Defective humidifying fan
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