E09
Lucid Internal Low-Voltage Power Supply Fault

Lucid charger shows E09 and the display or LEDs 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 DC power supply module on Lucid control board, Shorted front display/interface PCB, Loose low-voltage harness connectors

How to Fix / Troubleshooting

Safety first: Turn OFF the breaker before opening the charger.

Steps:

  • Check for moisture: Inspect the Lucid charger housing for signs of water ingress that could short low-voltage circuits.
  • Reseat connectors: With cover removed and power OFF, reseat the ribbon cable or harness between the main control board and the front display/interface PCB.
  • Disconnect accessories: If any optional Lucid accessories (Wi‑Fi module, load management module) are connected, temporarily disconnect them and test again.

Resolution: If E09 persists, the internal low-voltage supply on the control board is likely defective. Replace the Lucid control board assembly. Do not attempt to bypass fuses or inject external power.

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Repair Difficulty

Hard 4/5

Required Part

Lucid Control Board (Low-Voltage Power Section)
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