Eeprom Abnormal - Haier AS12GB3HRA Service Manual

The results deviate much?
The outdoor PCB is damaged and need to
be replaced

11.4.8 EEPROM abnormal

Indoor display
Indoor display
Outdoor display:
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
Check the EEPROM of the indoor or outdoor PCB, and be sure it is right.
NO
E4
F12
LED1 flash 1 time
The signal detected by the EEPROM are used to determine MCU
When the signal of EEPROM is error or the EEPROM is damaged.
Faulty EEPROM data
Faulty EEPROM.
Faulty PCB
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
The sensor is damaged. Replace the
YES
sensor with a new one.
Indoor EEPROM error
Outdoor EEPROM error
45
Service diagnosis
Domestic air conditioner