The charger shows E020; the display may indicate 'OCPP Error' or 'Backend Communication Fault'.

Safety first: No internal high-voltage work is needed for this fault.

• Check internet connection: Verify your router has internet access and that the charger is connected (Wi-Fi or Ethernet link light on).
• Verify OCPP settings: In the Autel management portal, confirm the OCPP server URL, port, and credentials are correct.
• Test local charging: Attempt a local (offline) charging session. If local charging works, the issue is limited to backend communication.
• Restart network equipment: Reboot your router and any network switches, then power-cycle the charger.
• Module replacement: If the network and settings are correct but E020 persists, the communication module may be defective and require replacement.