Vacuum stops and shows E7 when used in very dusty environments

Safety first: Remove the battery pack and wear a dust mask when handling dirty filters.

• Clean or replace filter: Remove the main filter and pre-filter. Tap off dust outdoors or replace with new Hilti filters if they are saturated or damaged.
• Inspect filter seal: Check the rubber gasket around the filter frame. Ensure it is seated correctly and not torn. An air leak can confuse the sensor.
• Clean sensor ports: If your model has visible small holes or channels near the filter compartment (pressure sensor ports), gently clear them with low-pressure air. Do not insert sharp objects.
• Reassemble carefully: Reinstall the filter fully and close the cover until it latches securely. Loose covers can trigger sensor faults.
• If E7 persists: The internal pressure/dust sensor or its circuit may be defective. Have the vacuum inspected and the sensor or PCB replaced by Hilti service.