Charger displays E18 and refuses to start; app may show ‘phase sequence error’ or ‘phase configuration fault’ on three‑phase units.

Safety: Three‑phase wiring must be handled only by qualified electricians. Turn OFF power at the main disconnect before inspection.

• Step 1 – Verify supply type: Confirm that the Enel X charger model is compatible with the supply (e.g., 3‑phase 400 V).
• Step 2 – Check terminal block: With power OFF, open the charger and verify that L1, L2, L3, N (if used), and PE are correctly connected and tight.
• Step 3 – Measure phases (electrician): Measure voltage between each pair of phases and to neutral. A missing or low phase indicates a supply issue.
• Step 4 – Correct phase order: If the charger requires a specific phase sequence, swap two phases at the input terminal block to correct rotation.
• Resolution: If wiring and supply are correct but E18 persists, the phase detection circuit on the main control board may be defective and require replacement.