E16
Amperfied
Overcurrent / Phase Imbalance Protection
Display shows E16; charger indicates ‘phase imbalance’ or ‘overcurrent’ and stops 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
Incorrect current limit configuration, Overloaded single phase on three‑phase unit, Loose phase connection in supply terminal block, Faulty current sensor on one phase
How to Fix / Troubleshooting
Safety: Overcurrent conditions can overheat wiring. Have an electrician verify the installation.
- Reduce charging current: Use the app or configuration interface to set a lower maximum current and test if charging becomes stable.
- Check for other large loads: Avoid running high‑power appliances (e.g., electric ovens, heat pumps) on the same phase while charging at maximum current.
- Electrician inspection: A professional should open the wallbox, check all phase and neutral terminals for tightness, and inspect for discoloration or heat damage.
- Test current sensors: The technician should verify that each phase current sensor (on the power board or meter) reads correctly. Replace the faulty sensor or board if readings are abnormal.
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Repair Difficulty
Professional Required
5/5
Required Part
Phase Current Sensors / Power Board
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