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Indoor Display
E4: indoor EEPROM error
outdoor display
F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times
Method of
malfunction
The Data detected by the EEPROM are used to determine MCU
detection
Malfunction
when the data of EEPROM is error or the EEPROM is damaged
detection
conditions
Faulty EEPROM data
Supposed
Faulty EEPROM
causes
Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
Troubleshooting
or parts damage may be occurred.
Replace the indoor or outdoor mainboard
32
Seivice diagnosis
Domestic air conditioner
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