E19
Lefant
Low Voltage Lockout / Battery Protection
Robot vacuum shows E19 or reports a low-voltage protection error even after charging.
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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
Battery cells degraded, Poor contact at battery connector, Faulty battery BMS (protection board), Charging dock not supplying full voltage
How to Fix / Troubleshooting
Safety: Turn OFF the robot and remove from dock before opening the battery compartment.
- Step 1 – Verify dock output: Ensure the dock LED is on. If you have a multimeter and experience, measure the dock output to confirm it matches the rated voltage.
- Step 2 – Inspect battery connection: Open the battery compartment and check that the battery connector is fully seated and not corroded.
- Step 3 – Full recharge: Reinstall the battery, place the robot on the dock, and charge for at least 6 hours without interruption.
- Step 4 – Short test run: Start a cleaning cycle. If the robot quickly shuts down and shows E19, the battery capacity is likely too low.
- Repair: Replace the battery pack with a new Lefant-compatible pack. If the issue persists with a new battery, the mainboard’s power regulation may be faulty.
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Repair Difficulty
Medium
3/5
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