Error 19
Wallbox
Safety Self‑Test Failure (RCD / Contactor Test)
Wallbox indicates 'Error 19'; charger may be locked out and app references 'safety relay' or 'self‑test' failure.
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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 RCD self‑test, Stuck contactor not opening during test, Faulty self‑test circuitry on main board, Mechanical wear of safety components
How to Fix / Troubleshooting
Safety first: A failed safety self‑test means the charger cannot guarantee safe operation. Do not attempt to force charging.
- Power cycle: Turn the breaker OFF for several minutes, then ON. The charger will usually repeat its self‑test on startup. If Error 19 reappears, continue below.
- Listen for test clicks: During startup, listen for the contactor and RCD test relay clicking. Absence of these sounds suggests mechanical failure.
- Internal inspection (technician): With power off, open the Wallbox and inspect the RCD module and contactor for signs of wear, burning, or mechanical damage.
- Functional test: A qualified technician can perform manual tests of the RCD and contactor according to Wallbox service procedures. If either fails to operate correctly, replace the component.
- Board diagnostics: If mechanical parts are good, the self‑test control circuit on the main board may be defective and require board replacement.
Do not bypass safety self‑tests. Replace faulty safety components with approved Wallbox parts.
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Repair Difficulty
Professional Required
5/5
Required Part
Internal RCD Module or Main Power Contactor
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