E07
AMPROAD
Ground / Earth Connection Fault
Charger displays E07 and does not start; may appear after installation or rewiring.
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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
No equipment ground connected at terminal block, High resistance ground connection, Reversed line and ground conductors, Corroded or loose ground lug inside charger
How to Fix / Troubleshooting
Safety: A missing or faulty ground is dangerous. Do not use the charger until the ground is corrected by a qualified electrician.
- 1. Verify ground at panel:
- Have a licensed electrician confirm that the circuit feeding the AMPROAD charger has a proper equipment grounding conductor.
- 2. Inspect internal ground connection:
- With power OFF, open the charger and locate the green/yellow ground wire and ground lug.
- Ensure the ground wire is securely fastened to the chassis and terminal block.
- Tighten the ground screw and clean any corrosion.
- 3. Check wiring polarity:
- Confirm that line conductors are on the correct terminals and that ground is not mistakenly landed on a line terminal.
- 4. Measure ground impedance (advanced):
- A qualified technician can measure ground impedance to ensure it meets code and AMPROAD requirements.
- 5. Reset and test: After correcting the ground, restore power and verify that E07 clears and the charger operates normally.
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Repair Difficulty
Hard
4/5
Required Part
AMPROAD Ground Lug and Input Terminal Block
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