ID1=External fan malfunction, ID2=Auxiliary power circuit, ID3=Control circuit, ID4=Communication anomaly, ID5=Insulation detection circuit.
Common causes
Fan connector loose or blade deformed (ID1)Auxiliary source circuit failure (ID2)LLC or BUCK control circuit failure (ID3)GFD, DCDC, or CME communication failure (ID4)Low insulation resistance or GFD self-test fault (ID5)
What to check
STEP 1
ID1: Check fan connector is seated. Check for abnormal noise or blade deformation. ID2/ID3/ID4/ID5: Check for short circuits in relevant circuits
Escalate if
Fault persists after checks — submit fault feedback via mySigen App > Support > Troubleshooting
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