Nissan EVSE shows E18; LEDs may indicate a configuration or pairing error; charger may still deliver basic charging.

Safety first: Configuration issues are low electrical risk, but always isolate power before any internal work.

• Factory reset: Follow the Nissan EVSE manual to perform a full factory reset (often involves holding a button while powering on). Reconfigure network and current settings afterward.
• Reapply firmware update: If E18 appeared after an update, use the official app or service tool to re-run the update process without interruption.
• Verify region settings: Ensure the charger is set to the correct country/region so that grid parameters match local standards.
• Contact support: If E18 persists, Nissan support may need to push a configuration package or replace the control board.