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