E12
Sun Country Highway
Input Phase / Line Configuration Error
Charger shows E12; unit may charge at reduced current or not at all.
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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
Incorrect wiring (single hot and neutral instead of two hots), Misconfigured dip switches or jumpers for supply type, Open line conductor, Faulty line sensing circuit on control board
How to Fix / Troubleshooting
Safety first: Only qualified persons should work on live circuits. Turn off power before opening the unit.
- Verify wiring method: Confirm that the Sun Country Highway charger is wired according to its installation manual (typically two hot legs and ground for 240 V). Do not connect neutral unless specified.
- Check dip switches/jumpers: Some models have configuration switches for 208/240 V or single/three-phase compatibility. Verify settings match the actual supply.
- Inspect for open conductor: With power off, check that both line conductors are securely attached at the terminal block. With power on (if qualified), measure voltage from each line to ground and between lines.
- Control board line sense: If wiring is correct and voltage is present but E12 persists, the line sensing circuit on the control board may be defective and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Input Terminal Block
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