E10
Hilti
User Interface / Switch Circuit Fault
Vacuum LEDs flash in a pattern corresponding to E10; tool unresponsive to trigger
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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
Defective on/off switch, Broken mode selector, Damaged ribbon cable between UI board and main PCB, Contaminated switch contacts with dust
How to Fix / Troubleshooting
Safety first: Remove the battery pack before touching any controls or opening covers.
- Check switch movement: Operate the on/off switch and any power selector several times. It should move smoothly and return to its neutral position. If it feels loose, jammed, or broken, the switch assembly may need replacement.
- Clean around controls: Use compressed air to blow dust out from around the switch and buttons. Do not spray liquids into the controls.
- Inspect for physical damage: Look for cracks in the handle or control panel that may have damaged internal wiring.
- Do not bypass switch: Never short wires to force the motor to run; this bypasses safety features.
- Professional repair: If the fault persists, the switch assembly or UI PCB must be replaced. This typically requires disassembling the handle and should be done by a technician.
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Repair Difficulty
Hard
4/5
Required Part
On/Off Switch Assembly or User Interface PCB
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