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10.3 Error Codes and Description indoor display
Indoor Malfunction
The code indication that is listed above is the main fault
10.3.1 Thermistor or Related Abnormality
Indoor Display
Method of
Malfunction
The temperatures detected by the thermistors are used to determine thermistor errors
Detection
Malfunction
when the thermistor input is more than 4.92V or less than 0.08V during compressor
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Conditions
Supposed
■ Faulty connector connection
Causes
■ Faulty thermistor
■ Faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
Check the connector connection.
Thermistor resistance check
Code indication
indoor
E1
E
2
E
4
E
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4
E1: Room temperature sensor failure
E2: Heat-exchange sensor failure
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Note: The values vary slightly in some models
parts damage may be occurred.
Is it normal?
Yes
Is it normal?
Description
Room temperature sensor failure
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NO
Correct the connection
NO
Replace the thermistor
Yes
Replace the indoor unit PCB
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Domestic air conditioner
Service diagnosis
Reference
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