E10
Amperfied
Internal Communication Bus Failure
Display shows E10; charger is online but cannot start charging and may show ‘internal communication error’.
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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
Faulty communication between main control board and power board, Loose internal ribbon cable or harness, Firmware mismatch between boards, Defective communication transceiver on one board
How to Fix / Troubleshooting
Safety: Internal access should be limited to trained technicians.
- Power‑cycle the unit: Turn off the wallbox at the breaker for at least 5 minutes to fully discharge internal capacitors, then restore power.
- Check for firmware/app updates: If your Amperfied charger is app‑connected, ensure the latest firmware is installed as per manufacturer instructions.
- Technician inspection: A technician should open the charger, reseat any internal communication ribbon cables between the logic and power boards, and inspect for damage or corrosion on connectors.
- Board replacement: If communication remains faulty, either the main control board or the power board may need replacement. Both should be matched to the correct firmware version.
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Repair Difficulty
Professional Required
5/5
Required Part
Internal Communication Harness / Main Control Board / Power Board
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