Eeprom Abnormal; Troubleshooting - Haier 1U12BE2ERA Service Manual

11.4.2 EEPROM abnormal

Indoor Display
outdoor display
Method of
malfunction detection
Malfunction detection
conditions
Supposed causes

Troubleshooting

E4: indoor EEPROM error
F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times
The Data detected by the EEPROM are used to determine MCU
when the data of EEPROM is error or the EEPROM is damaged
■Faulty EEPROM data
■Faulty EEPROM
■Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the indoor or outdoor mainboard
39
Installations
Domestic air conditioner