Charger shows E11; internal memory or configuration error, may revert to default settings

Safety first: Configuration work is low-voltage, but opening the charger still requires isolating mains power.

Step-by-step checks:

• 1. Power-cycle: Turn the charger off at the breaker for 60 seconds and then back on. Observe whether E11 reappears.
• 2. Backup configuration: If possible, connect via KEBA's configuration tool or web interface and export the current configuration for backup.
• 3. Restore defaults: Perform a factory reset according to KEBA documentation. Then re-enter essential settings (supply type, max current, authorization mode).
• 4. Firmware update: Check KEBA's support site for the latest firmware. Apply updates carefully, ensuring power is stable and the process is not interrupted.
• 5. Re-import configuration: If you have a known-good configuration file, import it and test operation.
• 6. Replace main board: If E11 persists after reset and firmware update, the non-volatile memory on the main control board is likely defective and the board should be replaced.

Document all settings before performing resets to minimize downtime.