E06
Garo
Overvoltage / Undervoltage Supply Fault
Charger shows E06 and refuses to start charging.
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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
Supply voltage outside allowed range, Loose supply terminals causing voltage drop, Faulty grid monitoring circuit on main board, Incorrect phase configuration (single‑phase vs three‑phase)
How to Fix / Troubleshooting
Safety first: Only a qualified electrician should measure live voltages.
- Verify supply voltage: Have an electrician measure the line‑to‑neutral and line‑to‑line voltages at the Garo charger input. Compare with the rated voltage in the installation manual.
- Check terminal tightness: With power OFF, tighten L1/L2/L3/N terminals to the specified torque. Loose connections can cause undervoltage under load.
- Confirm phase configuration: Ensure the charger is wired according to its specification (e.g., single‑phase 230 V vs three‑phase 400 V). Miswiring can trigger E06.
- Monitor grid stability: If E06 occurs only during known grid disturbances, consider enabling any available grid‑tolerance settings in the installer menu (if permitted by local regulations).
- Board replacement: If supply is stable and correctly wired but E06 persists, the internal voltage sensing circuit on the main control board may be defective and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (Voltage Sensing Circuit)
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