Haier Arc Series Service Manual page 53

7.3.2Thermistor or Related Abnormality (indoor unit)
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the temperatures detected by the thermistors are used to determine hermistor errors
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when the thermistor input is more than 4.92V or less than 0.08V during compressor
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operation.
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&DXWLRQ Be sure to turn off power switch before connect or disconnect connector,
Troubleshooting
Check the connector connection.
Thermistor resistance check
notes:
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Power timer
Faulty connector connection
Faulty thermistor
Faulty PCB
damage may be occurred.
Is it normal?
Yes
Is it normal?
Code indication
Power timer operate
operate
NO
NO
Yes
Replace the indoor unit PCB
Room temperature sensor failure
Heat-exchange sensor failure
50
Service Diagnosis
Correct the connection
Replace the thermistor
Description
Domestic Air Conditioner
or parts