Nilfisk
Battery Voltage Sensing Error
Display shows incorrect or fluctuating battery/voltage level on battery‑powered model
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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
Loose battery connections, Corroded battery terminals, Faulty voltage sense wiring, Aging battery pack
How to Fix / Troubleshooting
Safety first: Switch off the machine and disconnect the battery pack before working on connections.
- Inspect terminals: Clean corrosion from battery posts and connectors with a suitable cleaner and brush.
- Check tightness: Ensure all battery and sense wires are securely fastened.
- Test battery: Measure battery voltage at rest and under load. Replace the Nilfisk battery pack if voltage drops excessively.
- Inspect sense wiring: Repair or replace damaged voltage sense leads.
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Repair Difficulty
Medium
3/5
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