E05
Ohme
Input Overvoltage Protection Trip
Ohme charger displays E05; app may show 'Overvoltage' and charging is blocked.
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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 above allowed range, Loose neutral or line connection causing spikes, Faulty grid supply or DNO issue, Defective input voltage sensing circuit on Ohme main board
How to Fix / Troubleshooting
Safety: Overvoltage can damage both the charger and the vehicle. Do not repeatedly reset without investigating.
- 1. Note the time of occurrence: Overvoltage can be intermittent. Record when E05 appears and whether it coincides with other heavy loads switching on/off.
- 2. Power-cycle: Turn off the charger at the isolator for 60 seconds, then restore power and see if the error clears.
- 3. Check other appliances: If lights flicker or other devices behave oddly, there may be a supply issue. Contact your electricity supplier or DNO.
- 4. Electrician measurement: Have a qualified electrician measure the line voltage at the charger while under normal load. It should typically be within 230V ±10% (or local standard). Persistent readings above spec indicate a supply problem.
- 5. Internal sensing fault: If the supply voltage is normal but E05 persists, the internal voltage sensing circuit or main PCB may be faulty and require replacement by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (Voltage Sensing Circuit)
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