E11
Hyundai
Surge Protection / SPD Failure
Charger shows E11 and refuses to start; often after a lightning storm or grid surge.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Triggered or failed internal surge protection device (SPD), Damaged MOVs on power board, Excessive transient overvoltage from grid, Incorrect earthing reducing SPD effectiveness
How to Fix / Troubleshooting
Safety first: Turn off the charger at the breaker before opening the housing.
- Inspect SPD indicator (if present): Some Hyundai chargers include an SPD module with a status window (green = OK, red = replace). If red, the SPD must be replaced.
- Check for burn marks: Look for darkened areas around surge components on the power board.
- Verify earthing: Ensure the earth conductor is correctly connected; poor earthing can cause SPD failure.
- Component replacement: SPD modules are safety components and should be replaced with the exact Hyundai‑specified part by a qualified technician.
- If E11 persists after SPD replacement: Additional damage to the power board or control board may have occurred and will require board replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Surge Protection Device (SPD) Module
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