E2
Numatic Battery Overcurrent or Short-Circuit Protection

Cordless vacuum cuts out immediately when trigger is pressed, battery LEDs show error pattern (e.g., two red flashes)

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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

Shorted motor windings, Blocked airflow causing motor overload, Damaged internal wiring harness, Faulty motor control PCB

How to Fix / Troubleshooting

Safety first: Remove the battery pack and ensure the machine is completely powered down before inspection.

  • Check for blockages: Remove the floor head, wand, and hose. Look through each section for clogs (dust plugs, hair, debris). Clear any obstruction and ensure the filters are not completely blocked.
  • Inspect the brush head: Remove the brush bar (if tool-free removal is provided) and clear hair or string wrapped around it. A jammed brush can cause high current draw and trigger battery protection.
  • Test motor without accessories: With the battery refitted, run the vacuum body alone (no hose, wand, or floor head). If it still cuts out instantly, the fault is likely in the motor or control PCB.
  • Check wiring for damage: Visually inspect the wiring from the battery connector to the motor/control board for signs of burning, pinching, or broken insulation. Do not operate the machine if wiring is damaged.

If the battery continues to show an overcurrent error pattern with a clear airflow path, the motor or control PCB may be shorted and should be replaced by a professional.

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Repair Difficulty

Hard 4/5

Required Part

Motor Assembly
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