Charger shows E004 in the app; LED ring pulses red; unit will not enable charging due to overvoltage.

Safety first: Only qualified persons should measure mains voltage inside the charger.

• Check grid supply: Using a calibrated multimeter, verify line-to-neutral and line-to-line voltages at the main distribution board. Compare with the NewMotion charger’s rated input (e.g., 230/400 V).
• Inspect terminal block: With power isolated, open the charger and check that L1/L2/L3 and N are correctly landed and firmly tightened on the internal terminal block. Look for discoloration or heat damage.
• Confirm configuration: Ensure the charger is configured in software (installer menu or app) for the correct supply type (single-phase vs three-phase). A mismatch can trigger E004.
• Check neutral integrity: A floating or loose neutral can cause high phase-to-neutral voltages. Tighten neutral connections and inspect the neutral bar in the distribution board.
• Monitor voltage: If the supply voltage is genuinely too high, contact your utility provider or an electrician. Do not attempt to modify the grid supply yourself.
• PCB fault: If measured voltages are normal but E004 persists, the voltage sensing circuit on the main control PCB may be faulty and require replacement.