Seivice diagnosis
Domestic air conditioner
Indoor Display E4: indoor EEPROM error
outdoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
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
11.4.2 EEPROM abnormal
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