E08
AMPROAD
Overcurrent / Output Overload Fault
Charger shows E08 and stops charging shortly after starting; vehicle may show a charging error.
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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 current setting in charger configuration, Internal current sensor (CT or shunt) failure, Shorted turns in output inductor, Faulty power board IGBT/MOSFET stage
How to Fix / Troubleshooting
Safety: Overcurrent can overheat wiring. Turn OFF the breaker before opening the unit.
- 1. Check current setting:
- Using the AMPROAD app or front panel (if available), verify that the maximum current is set within the circuit rating (e.g., 32 A on a 40 A breaker).
- Reduce the current setting and test again.
- 2. Inspect wiring size:
- Confirm that the supply wiring gauge matches the charger’s rated current.
- 3. Internal inspection:
- With power OFF, open the charger and inspect the power board for burnt components, especially around the current sensor and power semiconductors.
- Check the output inductor for discoloration or smell of burnt varnish.
- 4. Replace faulty modules:
- If the current sensor or power stage is damaged, replace the AMPROAD power board assembly.
- 5. Retest: After repair, set a conservative current limit and run a monitored charge session to ensure E08 does not recur.
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Repair Difficulty
Professional Required
5/5
Required Part
AMPROAD Power Board with Current Sensor
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