E10
MUSTART
Line Wiring / Phase Detection Error
Charger shows “E10” and refuses to charge; may appear when connected to a three‑phase or nonstandard supply.
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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
Incorrect line-to-line connection on supply, using nonstandard adapter to three‑phase outlet, reversed line and neutral on certain models, internal line sensing circuit fault
How to Fix / Troubleshooting
Safety warning: Miswired high‑voltage circuits are dangerous. Do not attempt to rewire outlets yourself unless you are a licensed electrician.
- Verify correct outlet type: Use only the outlet type specified for your MUSTART model (e.g., NEMA 14‑50, 6‑50). Avoid industrial three‑phase outlets or homemade adapters.
- No DIY adapters: Do not use custom adapters that change pin assignments or convert between unrelated plug types.
- Electrician inspection: Have a licensed electrician confirm that the receptacle is wired according to code and the charger’s installation manual (correct line, neutral, and ground connections).
- Persistent E10 on correct wiring: If wiring is verified good and E10 remains, the internal line detection circuit on the main control board may be defective and require replacement.
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Repair Difficulty
Hard
4/5
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