1. Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Husqvarna DE 120 HEPA Dust Extractor Vacuum. Please read this manual thoroughly before using the product to ensure proper function and safety.

Figure 1: Husqvarna DE 120 HEPA Dust Extractor Vacuum. This image shows the complete dust extractor unit from the front, with the hose connected and the floor tool resting on the base.
Key Features:
- Continuous High Performance: The e-flow system automatically adjusts airflow, extending the time between filter cleanings.
- High Safety Standards: Complies with H-class standards, featuring a certified HEPA filter separate from the pre-filter. Includes an integrated filter alarm with adjustable hose-diameter settings.
- Easy to Clean and Maintain: Designed for easy cleaning and decontamination due to high water protection. The Human-Machine Interface (HMI) provides operational maintenance warnings.
- Easy to Transport: Compact and lightweight design with lifting hooks, integrated storage for hoses, wand, and floor tool, and two wheels for maneuverability.
2. Safety Information
Always prioritize safety when operating any machinery. Read and understand all safety warnings and instructions provided in this manual and on the product itself.
General Safety Precautions:
- Ensure the power supply matches the specifications on the product label.
- Do not operate the dust extractor in wet conditions unless specifically designed for it and all safety measures are in place.
- Always wear appropriate personal protective equipment (PPE) such as safety glasses, hearing protection, and dust masks.
- Keep children and unauthorized personnel away from the operating area.
- Disconnect power before performing any maintenance or cleaning.
Specific Safety Features:
The Husqvarna DE 120 is designed with advanced safety features:
- H-Class Compliance: Meets stringent H-class standards for heavy-duty dust extraction, indicating high filtration efficiency for hazardous dusts.
- HEPA Filter: Equipped with an EN1822 certified HEPA filter, ensuring capture of very fine particles. This filter is isolated from the pre-filter to maintain integrity.
- Filter Alarm: An integrated alarm system monitors filter status and indicates when cleaning is required, preventing reduced performance and potential exposure.
3. Setup and Assembly
3.1 Unpacking
Carefully remove the dust extractor and all accessories from the packaging. Inspect for any shipping damage. Retain packaging for future transport or storage.
3.2 Component Identification

Figure 2: Side view of the Husqvarna DE 120, illustrating integrated storage for the power cord and hose.
Familiarize yourself with the main components:
- Main Unit (Motor/Filter Housing)
- Collection Bag/Container
- Hose Inlet/Outlet
- Control Panel (HMI)
- Wheels and Transport Handle
- Power Cord
- Hose and Floor Tool (accessories)
3.3 Connecting Accessories
- Attach Hose: Securely connect the dust extraction hose to the inlet port on the main unit. Ensure a tight seal to prevent air leaks.
- Attach Floor Tool/Wand: Connect the desired floor tool or wand to the other end of the hose.
- Power Connection: Plug the power cord into a suitable grounded electrical outlet.
4. Operating Instructions
4.1 Control Panel Overview (HMI)

Figure 3: Side view highlighting the control panel (HMI) and power switch on the Husqvarna DE 120.

Figure 4: Detailed view of the HMI on the Husqvarna DE 120, showing filter status indicators and control buttons.
The Human-Machine Interface (HMI) provides real-time information and control over the dust extractor's functions.
- Power Button: Located on the main unit, typically a rocker switch.
- Filter Status Indicators: LEDs on the HMI display the current filter condition and indicate when cleaning is needed.
- Filter Cleaning Button: A dedicated button on the HMI to initiate the filter cleaning process.
- Hose Diameter Adjustment: Use the HMI controls to set the correct hose diameter for optimal performance and accurate filter alarm readings.
4.2 Starting the Dust Extractor
- Ensure all connections (hose, power) are secure.
- Turn on the main power switch.
- The e-flow system will automatically begin to adjust airflow for optimal performance.
4.3 E-flow System
The ingenious e-flow system continuously monitors airflow and automatically adjusts motor speed to maintain consistent suction. This prolongs the operational time between filter cleanings, allowing for longer uninterrupted work periods.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Husqvarna DE 120. Always disconnect the power supply before performing any maintenance.
5.1 Filter Cleaning
When the integrated filter alarm indicates that cleaning is necessary, follow these steps:
- Ensure the unit is powered off and disconnected from the main power supply.
- Locate the filter cleaning button on the HMI.
- Press the button to initiate the automatic filter cleaning cycle. Refer to the HMI for progress or completion indicators.
- For manual cleaning or replacement, consult the detailed instructions in the full product manual.
5.2 General Cleaning and Decontamination

Figure 5: An operator cleaning the Husqvarna DE 120 unit with a water hose, demonstrating its high water protection for decontamination.
The DE 120 features a high water protection standard, allowing for easy cleaning and decontamination of the machine exterior. Use a damp cloth or a low-pressure water hose for thorough cleaning. Ensure all electrical components are protected during cleaning and allow the unit to dry completely before reconnecting power.
5.3 HEPA Filter Replacement
The HEPA filter is a critical component for maintaining H-class compliance. It is separated from the pre-filter to prevent contamination during maintenance. Replace the HEPA filter according to the manufacturer's recommendations or if damage is suspected. Always use genuine Husqvarna replacement filters.
6. Troubleshooting
The HMI provides warnings for operational maintenance, enabling early and on-site troubleshooting. Consult the following table for common issues and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Reduced Suction Power | Clogged filter, full collection bag, hose obstruction. | Clean filter (press button on HMI), empty collection bag, check hose for blockages. |
| Filter Alarm Activates Frequently | Filter requires cleaning, incorrect hose diameter setting. | Initiate filter cleaning. Verify correct hose diameter setting on HMI. |
| Unit Does Not Power On | No power supply, tripped circuit breaker, faulty power cord. | Check power connection and outlet. Reset circuit breaker. Inspect power cord for damage. |
If issues persist after attempting these solutions, contact Husqvarna customer support or an authorized service center.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | Husqvarna |
| Model Number | DE 120 |
| Power Source | Corded Electric |
| Item Weight | 150 Pounds |
| Package Dimensions | 48 x 48 x 48 inches |
| UPC | 805544571142 |
| Form Factor | Cannister |
| Filtration | HEPA (EN1822 certified), H-class compliant |
8. Warranty and Support
For detailed warranty information, please refer to the warranty card included with your product or visit the official Husqvarna website. Keep your proof of purchase for warranty claims.
For technical assistance, spare parts, or service, please contact Husqvarna customer support or your authorized Husqvarna dealer. Contact information can typically be found on the Husqvarna website or in your product documentation.





