Haier HSU-07HV03/R2 - Error Codes and Diagnostic Flowcharts

Error Codes and Description
Code indication
indoor
Description
Reference
Page
E1 Room temperature sensor failure
E2 Heat-exchange sensor failure
E4 Indoor EEPROM error/Humidity sensor malfunction
Indoor Malfunction
E14 Indoor fan motor malfunction
Trouble Shooting
E1: Room temperature sensor failure CN8
E2: Heat-exchange sensor failure CN8
E4: Indoor EEPROM error: Replace the PCB of indoor unit
YES
NO
YES
whether terminal CN8
on
indoor PCB contact wellt?
Pull out the terminals on the indoor mainboard and
reinsert them
Pull the sensor out of the mainboard
1) Measure the value of resistance Between its tw
o
jumpers
2)
Measure the temperature at the room temperature
sensing head.
Check the value
of the
sensor to see
whether the
sensor is damaged or not?
NO
Sensor is broken,replace it with new sensor
The indoor PCB is broken, replace with new indoor
PCB
Air Conditioner
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Edition:2006/1/10