Haier AS09GS1ERA - Eeprom Abnormal


Service diagnosis








7.4.8 EEPROM abnormal 

Indoor display E4 Indoor EEPROM error
Indoor display F12
Outdoor display: LED1 flash 1 time













Domestic air conditioner
The results deviate much?
YES
The sensor is damaged. Replace the
sensor with a new one.
NO
The outdoor PCB is damaged and need to
be replaced
Outdoor EEPROM error
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
'  
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
ƵFaulty EEPROM data
ƵFaulty EEPROM.
ƵFaulty PCB
The signal detected by the EEPROM are used to determine MCU
When the signal of EEPROM is error or the EEPROM is damaged.
Check the EEPROM of the indoor or outdoor PCB, and be sure it is right.