Charger displays E05 and refuses to start; sometimes occurs after power outage or surge.

Safety first: Only a qualified electrician should measure mains voltages inside the charger. Isolate the circuit before touching terminals.

• Check building supply: Have an electrician verify that line-to-neutral and line-to-line voltages at the charger’s supply terminals are within Mennekes specifications (typically 230/400 V ±10%).
• Inspect terminal block: With power OFF, check that L1/L2/L3/N/PE conductors are correctly landed and tightened to the specified torque. Look for discoloration or melted insulation.
• Surge protection device: If your Mennekes unit includes an SPD, inspect its status indicator (often green/red). A tripped or failed SPD may need replacement.
• Internal power supply: The low-voltage SMPS on the main PCB or a separate PSU module may be damaged by surges. Check for bulged capacitors, burnt components, or no low-voltage output. Replace the PSU module or main PCB as required.
• Retest after stabilization: After correcting supply issues and replacing any damaged components, clear the error by power-cycling the charger.