E17
Ohme Internal Energy Meter / CT Measurement Fault

Ohme charger displays E17; app may show 'Meter error' or 'Energy metering fault'.

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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

Faulty internal energy metering IC, Loose CT sensor connection, Corrupted calibration data, Damaged metering harness

How to Fix / Troubleshooting

Note: Charging may still work, but energy reporting and load management can be inaccurate.

  • 1. Power-cycle: Turn off the charger at the isolator for 1 minute, then back on. Check if E17 clears.
  • 2. Compare readings: If the charger still reports energy, compare its kWh readings with your main meter over a short period to see if they are obviously wrong.
  • 3. Check app configuration: Ensure any external CT clamps or load management settings in the app are configured correctly.
  • 4. Technician inspection: A technician can open the unit, verify CT connections, and test the metering IC. If faulty, the metering board or main PCB may need replacement.
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Repair Difficulty

Medium 3/5

Required Part

Internal Energy Metering Circuit
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