Primecom
Current Measurement Inaccuracy
Charger display shows incorrect or fluctuating current values during a stable charge.
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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
Faulty current sensor (CT or shunt) on control board, Loose sensor wiring, Electromagnetic interference from nearby equipment, Firmware calibration drift
How to Fix / Troubleshooting
Safety first: Incorrect current readings can mask overcurrent conditions. Monitor for overheating while diagnosing.
- 1. Compare with vehicle data: Check the charging current reported by the vehicle and compare it to the Primecom display.
- 2. Avoid running heavy equipment nearby: Large motors or welders near the charger can induce noise; relocate such equipment if possible.
- 3. Reseat sensor connectors: With power off, open the housing and ensure the current sensor wiring is firmly connected to the control board.
- 4. Firmware update: If available, update firmware to correct any known calibration issues.
- 5. Replace sensor or board: If readings remain inaccurate, replace the current sensor module or the main control board, depending on design.
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Repair Difficulty
Medium
3/5
Required Part
Output Current Sensor / Main Control Board
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