Haier 1U35YESFRA-4 - Page 35

Service Diagnosis
35
Replace the indoor or outdoor mainboard.
10.4.2 EEPROM abnormal
Indoor Display
Indoor display
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.
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Trouble
shooting
Supposed
Causes