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HSU09VHG(DB)-SM
Service Diagnosis
7.4.2 EEPROM abnormal
Indoor Display
E4: indoor EEPROM error
Indoor display
F12: Outdoor EEPROM error ;Outdoor 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.
Replace the indoor or outdoor mainboard
52
Domestic Air Conditioner
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