E14
MUSTART
Firmware / Internal Software Error
Charger shows “E14” and will not start charging; may appear after a firmware update or power surge (on models that support updates).
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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
Corrupted firmware on main control board, interrupted firmware update, memory fault on microcontroller, surge‑induced logic error
How to Fix / Troubleshooting
Safety warning: Do not attempt unofficial firmware modifications. Incorrect firmware can disable safety protections.
- Full power cycle: Turn off the breaker or unplug the charger for at least 5 minutes, then restore power.
- Check for update instructions: If your MUSTART model supports firmware updates via USB or app, follow the manufacturer’s official procedure to re‑apply the latest firmware.
- Stable power: Ensure the charger is connected to a stable power source during any update process to avoid interruption.
- Contact support: If E14 persists, the main control board may need to be reprogrammed or replaced by the manufacturer.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Firmware / Microcontroller)
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