HSU12HG(DB)-SM Service Diagnosis
58
Domestic Air Conditioner
7.3.7 EEPROM abnormal
Indoor Display
E4 ˖Indoor EEPROM error
F12˖Outdoor EEPROM error LED1 flash 1 times
Method of
The Data detected by the EEPROM are used to determine MCU.
Malfunction
Detection
Malfunction
When the Data of EEPROM is error or the EEPROM is damaged.
Decision
Conditions
Supposed
Faulty EEPROM data
Causes
Faulty EEPROM
Faulty PCB
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or
parts damage may be occurred.
Check the EEPROM of
the indoor or outdoor mainboard, and be sure it is right.
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