E30
Walli
Generic Internal Fault / Self‑Test Failure
Charger shows E30; app indicates 'Unknown internal error' or 'Generic fault'.
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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
Unexpected condition detected during self‑test, Multiple minor sensor discrepancies, Firmware bug, Latent hardware defect on main board
How to Fix / Troubleshooting
Safety first: Treat generic faults cautiously; do not ignore repeated errors.
Steps:
- Record details: Note the time, conditions, and any patterns when E30 occurs. Export logs from the Walli app if possible.
- Power cycle: Turn off the charger for 5–10 minutes, then restore power and observe startup behavior.
- Firmware update: Ensure the charger is running the latest firmware version.
- Basic checks: Inspect for obvious issues: water ingress, burnt smell, loose connectors, or damaged cables.
- If E30 recurs frequently: Contact Walli support with logs. In many cases, replacing the main control board is the most effective remedy for persistent generic internal faults.
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Repair Difficulty
Hard
4/5
Required Part
Walli main control board
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