E14
Mini
Firmware Corruption / Bootloader Error
Charger shows E14; no charging; often after a failed firmware update or power loss during update
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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
Interrupted firmware update, Incompatible firmware image loaded, Faulty flash memory on main PCB, Power loss during update process
How to Fix / Troubleshooting
Warning: Do not repeatedly power cycle during firmware updates; this can brick the unit.
- Attempt recovery mode (if supported): Some Mini chargers allow a forced firmware recovery via a service button or USB port. Follow Mini’s service documentation to enter recovery mode and reload firmware.
- Use official firmware only: Download firmware from official Mini channels and ensure it matches your exact charger model and hardware revision.
- Stable power: During any recovery attempt, ensure the charger supply is stable and will not be interrupted.
- Board replacement: If the bootloader itself is corrupted or flash memory is defective, the main control board will need to be replaced by an authorized technician.
After successful recovery, verify all settings (current limit, network, authorization) as they may revert to defaults.
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Repair Difficulty
Professional Required
5/5
Required Part
Mini EV Charger Main Control Board
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