E005 displayed; charger reports supply voltage error and will not enable charging.

Safety first: Work on supply wiring only if you are a qualified electrician. Incorrect handling can cause electric shock or fire.

• Step 1 – Check other loads: Verify if other appliances in the house are experiencing flickering lights or brownouts. If yes, contact your utility provider.
• Step 2 – Measure supply voltage: With appropriate test equipment and training, measure line-to-neutral and line-to-line voltages at the charger’s supply terminals. Compare with the voltage range specified in the Alfen manual.
• Step 3 – Verify phase configuration: Access the Alfen configuration (via installer app or web interface) and ensure the charger is set to the correct supply type (1P or 3P) and nominal voltage.
• Step 4 – Inspect neutral and earth: With power OFF, check that neutral and earth conductors are securely connected and not discolored or overheated.
• Step 5 – Internal voltage sensing: If supply is stable and correctly configured, but E005 persists, the voltage sensing circuit on the main PCB may be defective.
• When to call a technician: A licensed electrician or Alfen service partner should diagnose persistent E005 errors and replace the main control board if necessary.