E07
Enel X
AC Input Undervoltage Protection
Charger shows E07 and will not charge; app may show ‘undervoltage’ or ‘input voltage too low’.
Advertisements
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.
Advertisements
Possible Causes
Supply voltage below minimum rating, Undersized or long supply cable causing voltage drop, Loose line connection at terminal block, Faulty input voltage sensor on control board
How to Fix / Troubleshooting
Safety: Low voltage can cause overheating. Do not force operation if undervoltage persists.
- Step 1 – Check other loads: Turn off large household loads (HVAC, ovens) and see if the error clears, indicating a supply sag issue.
- Step 2 – Inspect terminal block: With power OFF, remove the cover and tighten the line and neutral terminals on the input block. Look for discoloration or melted insulation.
- Step 3 – Measure voltage (electrician): Have an electrician measure voltage at the charger while under load. If it drops below the charger’s minimum (e.g., 200 V), the supply wiring may be undersized or too long.
- Step 4 – Correct wiring: Upgrade the supply cable gauge or shorten the run as needed to reduce voltage drop.
- Step 5 – Control board check: If supply voltage is stable and within spec but E07 remains, the input voltage sensing circuit on the main control board may be faulty and require replacement.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Input Terminal Block / Main Control Board
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements