E15
Splitvolt
Line Polarity / Phase Detection Error
Splitvolt EV charger shows E15 and refuses to charge; may occur after incorrect installation or wiring changes.
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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
Reversed line conductors on a multi-wire branch circuit, Miswired NEMA receptacle, Shared neutral/ground misconfiguration, Internal line-sensing circuit fault
How to Fix / Troubleshooting
Safety first: Miswiring can create shock and fire hazards. Have an electrician verify wiring if you are not qualified.
- Inspect receptacle wiring: With power OFF, remove the receptacle cover and verify that the hot, neutral (if present), and ground are connected to the correct terminals according to the NEMA configuration and Splitvolt installation guide.
- Check for shared circuits: Ensure the outlet is on a dedicated 2-pole breaker with common trip, not two separate single-pole breakers.
- Use a wiring diagram: Compare the actual wiring to the Splitvolt manual. Correct any reversed or swapped conductors.
- Test after correction: Restore power and reconnect the charger. If E15 remains on a correctly wired circuit, the internal line-sensing circuit may be defective and require service.
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Repair Difficulty
Hard
4/5
Required Part
Line Sensing Circuit
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