AMPROAD
Unexpected Current Derating
Vehicle reports that charging speed is lower than expected; AMPROAD app shows reduced current even though settings are at maximum.
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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
High internal temperature causing automatic derating, Weak supply voltage sagging under load, Incorrect circuit rating configuration, Faulty current sensor reading low
How to Fix / Troubleshooting
Safety: Reduced current is generally safe but may indicate underlying issues. Use caution when inspecting live circuits.
- 1. Check app settings:
- Confirm that the maximum current in the AMPROAD app matches the charger’s rating and the breaker size.
- 2. Monitor temperature:
- Use the app (if supported) to view internal temperature; high readings indicate thermal derating.
- Improve ventilation or reduce ambient temperature as needed.
- 3. Verify supply voltage:
- Have an electrician measure voltage at the charger during charging; significant sag may cause derating.
- 4. Inspect current sensor:
- If readings are clearly inaccurate, the current sensor on the power board may be faulty and require board replacement.
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Repair Difficulty
Medium
3/5
Required Part
AMPROAD Power Board with Current Sensor
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