E14
AMPROAD Internal Low-Voltage Power Supply Fault

Charger shows E14 and the display backlight may flicker; unit may reboot repeatedly.

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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

Failed auxiliary power supply module, Shorted low-voltage rail on control board, Loose low-voltage harness, Overloaded accessory (e.g., comms module drawing too much current)

How to Fix / Troubleshooting

Safety: The low-voltage supply is derived from mains. Turn OFF the breaker and wait for capacitors to discharge before opening.

  • 1. Visual inspection:
    • Open the charger and locate the auxiliary power supply module or section on the power board.
    • Look for bulging capacitors, burnt components, or discoloration.
  • 2. Check connectors:
    • Reseat low-voltage harnesses between the power board, control board, and communication module.
  • 3. Isolate accessories:
    • If possible, disconnect non-essential modules (e.g., Wi‑Fi board) and see if E14 clears when powered.
  • 4. Replace faulty module:
    • If the auxiliary supply is visibly damaged or outputs incorrect voltages, replace the AMPROAD power board or auxiliary PSU module.
  • 5. Final test: After repair, verify stable operation without flickering or reboots and confirm E14 is cleared.
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Repair Difficulty

Professional Required 5/5

Required Part

AMPROAD Auxiliary Power Supply / Power Board
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