E20
Enel X
Low‑Voltage Auxiliary Power Supply Failure
Charger displays E20 and stops charging; app may show ‘internal power supply error’.
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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 SMPS on control board, Shorted low‑voltage rail, Overload from peripheral modules (Wi‑Fi, meter), Surge damage
How to Fix / Troubleshooting
Safety: Internal power supply faults can involve high voltage. Only qualified personnel should service the board.
- Step 1 – Power cycle: Turn OFF the breaker for 5 minutes, then turn it back ON. Observe if the charger boots normally or immediately shows E20.
- Step 2 – Visual inspection: With power OFF and cover removed, inspect the control board for burnt areas, bulging capacitors, or cracked components near the power supply section.
- Step 3 – Disconnect peripherals: If possible, disconnect non‑essential modules (Wi‑Fi, meter) and reboot to see if the fault clears, indicating an overloaded auxiliary rail.
- Resolution: Replace the main control board if the internal power supply is damaged. If a peripheral module is shorted, replace that module and reconnect.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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