Seivice diagnosis
Domestic air conditioner
11.4.2 EEPROM abnormal
Indoor Display E4: indoor EEPROM error
outdoor display 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
ŶFaulty EEPROM data
ŶFaulty EEPROM
ŶFaulty 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
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
Supposed causes
47
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