Haier AS07BS4HRA Service Manual

Seivice diagnosis
Domestic air conditioner
11.4.1 Thermistor or Related Abnormality
The temperatures detected by the thermistors are used to determine thermistor errors
when the thermistor input is more than 4.92V or less than 0.08V during compressor
operation.
Note: The values vary slightly in some models
Faulty connector connection
Faulty thermistor
Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
Thermistor resistance check method:
Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester. The
relationship between normal temperature and resistance is shown in the value of indoor thermistor.
*Thermistor resistance check
NO
YESYES
Check the connector connection,
whether if it loose or misplug
Re-connect
NO
Replace the thermistor
Replace the indoor PCB
Is the resistance is conformity
with normal temperature
E1: Room temperature sensor failure
E2: Heat-exchange sensor failure
LED1 flash 10 times
Defrost temperature sensor failure
LED1 flash 11 times
Suction temperature sensor failure
LED1 flash 12 times
Ambient temperature sensor failure
LED1 flash 13 times
Discharge temperature sensor failure
Indoor display
Outdoor display
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
Supposed causes

YES

Haier AS07BS4HRA Specifications

General

Brand	Haier
Model	AS07BS4HRA
Category	Air Conditioner
Language	English