E19
Mennekes
Backend / OCPP Communication Fault
Charger shows E19; OCPP or backend communication error on smart-connected models.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Network outage, Incorrect OCPP server URL or credentials, Faulty communication module (Ethernet/4G), Firewall blocking outbound connections
How to Fix / Troubleshooting
Safety first: No high-voltage work is required for this fault, but observe general electrical safety.
- Check physical connection: Verify Ethernet cable connection or 4G antenna and SIM card seating.
- Network diagnostics: Use the charger’s diagnostics menu to check IP address, gateway, and DNS settings. Correct any misconfigurations.
- OCPP settings: Confirm the backend URL, port, and authentication parameters with your service provider and update them in the charger configuration.
- Module replacement: If the communication module does not register on the network despite correct settings, replace the Ethernet/4G communication module.
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Repair Difficulty
Medium
3/5
Required Part
Communication Module (Ethernet / 4G)
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