E19
Walli
Internal Energy Meter Communication Fault
Walli charger displays E19; app shows 'Meter error' or 'Energy meter fault' on metered 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
Failed internal kWh meter module, Loose RS‑485 or serial cable between meter and main board, Incorrect meter configuration in Walli firmware, Corrupted meter firmware
How to Fix / Troubleshooting
Safety first: De‑energize before opening the charger.
Steps:
- Reboot: Turn off the Walli breaker for several minutes, then restore power and check if the meter is detected.
- Internal cable check: With power off, open the housing and locate the internal energy meter and its communication cable. Ensure connectors are fully seated.
- Configuration: In the installer menu or app, verify that the correct meter type and address are configured.
- Replace meter: If communication cannot be restored, replace the Walli internal energy meter module with an identical model.
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Repair Difficulty
Medium
3/5
Required Part
Walli internal energy meter
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