E10
Hyundai
Phase Loss / Phase Imbalance (Three‑Phase Models)
E10 appears and the charger stops; vehicle may show a charging error related to phase imbalance.
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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
One phase not connected at terminal block, Blown upstream fuse on one phase, Loose phase conductor inside charger, Faulty phase detection circuit on control board
How to Fix / Troubleshooting
Safety first: Only a qualified person should work on three‑phase wiring. Turn off all associated breakers.
- Verify phase presence: Measure voltage between each pair of phases (L1‑L2, L2‑L3, L1‑L3) at the charger input. All should be within the specified range.
- Check terminal tightness: With power OFF, tighten all phase conductors in the Hyundai charger terminal block.
- Inspect for discoloration: Look for signs of overheating on any one phase conductor or terminal.
- Upstream protection: Confirm that all three fuses or breakers feeding the charger are intact and of the same rating.
- If supply is correct and E10 remains: The phase detection circuit on the main control board may be faulty and should be replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (Phase Detection Circuit)
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