E18
Lucid
Critical Internal Self-Test Failure / Lockout
Display shows E18; charger will not start and may show ‘EVSE Lockout’ or ‘Internal Fault – Service Required’.
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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
Multiple stored critical faults on Lucid control board, Corrupted firmware, Hardware failure detected during boot diagnostics
How to Fix / Troubleshooting
Safety first: Turn OFF power before any internal work.
Steps:
- Extended power reset: Turn the breaker OFF for at least 15 minutes to fully discharge internal capacitors, then restore power.
- Firmware recovery: If Lucid provides a recovery or USB firmware image, follow the official procedure to reflash the charger.
- Check event log: Use the Lucid app or installer interface to view detailed fault history, if available, to identify the underlying cause.
Resolution: If E18 remains after firmware recovery and resets, the Lucid control board or power module is likely defective. Replacement by a qualified technician is required.
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Repair Difficulty
Professional Required
5/5
Required Part
Lucid Control Board / Power Module
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