Error 16
Wallbox
Internal Low‑Voltage Power Supply Fault
Wallbox shows 'Error 16'; charger may reboot repeatedly or stay offline; often related to power supply issues.
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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 SMPS (switched‑mode power supply) on main board, Short on low‑voltage rail, Overvoltage event damaging PSU, Loose low‑voltage connector
How to Fix / Troubleshooting
Safety first: Disconnect mains power and wait for capacitors to discharge before opening the unit.
- Observe behavior: Note if LEDs flicker or the display resets repeatedly. This suggests unstable low‑voltage power.
- Check for external causes: Verify that the mains supply is stable and within spec. Frequent brownouts or surges can damage the PSU; consider installing surge protection.
- Internal inspection (technician): Open the Wallbox and inspect the PSU area on the main board for bulging capacitors, burn marks, or a burnt smell.
- Connector check: Ensure all low‑voltage harnesses from the PSU section to other boards (RFID, communication, display) are firmly seated.
- Board replacement: The PSU is typically integrated into the main control board. If defective, replace the main board following Wallbox service procedures.
Do not attempt component‑level repair of the PSU unless you are qualified in electronics repair and authorized by Wallbox.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Integrated Power Supply)
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