Thermistor Or Related Abnormality (Outdoor Unit) - Haier HSU-18,22HVA103/R2(DB) Service Manual

7.2.5 Thermistor or Related Abnormality(outdoor unit)
Frost-removing temperature sensor failure
Indoor display:
outdoor display:
Exhaust temperature sensor failure
Indoor display:
outdoor display:
Ambient temperature sensor failure
Indoor display:
outdoor display:
This type of error is detected by checking the thermistor input voltage to the microcomputer.
Method of
Malfunction (A thermistor error is detected by checking the temperature)
Detection
Malfunction The thermistor input is above 4.9V or below 0.1V with the power on.
Decision
* Note: The values may vary slightly in some models
Conditions
■ Faulty connector connection
Supposed
Causes ■ Faulty thermistor
■ Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
Troubleshooting
Check the connector connection.
Is it normal?
Thermistor resistance check
Is it normal?
Replace the outdoor unit PCB
HSU-18,22HVA103/R2(DB)
F21
LED1 flash 10 times:
F25
LED1 flash 13 times:
F6
LED1 flash 12 times:
else parts damage may be occurred.
NO
YES
NO
YES
81
Correct the connection
Replace the thermistor
Service Diagnosis
or
Domestic Air Conditioner