Samsung Electronics4-20
Restart the unit after replacing the PCB
Indoor unit display
(Operation)
(Defrost)
(Timer) X (Filter)
Symptom
EEPROM circuit failure
Failure
EEPROM component failure, EEPROM circuit parts missing/damaged/soldering failure
4-3-6 EEPROM circuit failure
No
Yes
Are the EEPROM circuit
components in good conditions?
(missing components / damage /
soldering failure)
Replace the PCB if the restart fails
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