4. Alignment and Troubleshooting
► Error Code
S2–4120
► Error message
Door open Close it
► Symptom
Door is open or the cover open switch is defective.
► Troubleshooting method
1) Check if the front cover is closed perfectly.
2) If the error persists, check that the cover-open sensor is working normally. If it is defective, replace the HVPS board.
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