1. Introduction
This manual provides instructions for the installation and maintenance of your CONTIA replacement parts kit for Xiaomi Roborock and Xiaowa E20, E202, E202-00 robot vacuum cleaners. Regular replacement of wear-and-tear parts is essential for maintaining optimal cleaning performance and extending the lifespan of your robot vacuum.
2. Product Components
The CONTIA replacement parts kit (Set F) typically includes the following components:
- Main Brush (Roller Brush)
- Side Brushes (3-arm type)
- HEPA Filters
- Caster Wheel
- Main Brush Cover

Figure 2.1: Overview of the CONTIA replacement parts kit, showing the main brush, four side brushes, two HEPA filters, and four mop pads.
3. Installation Guide
Before installing any replacement parts, ensure your robot vacuum cleaner is powered off and disconnected from its charging base. Refer to your vacuum cleaner's original user manual for specific instructions on accessing component compartments.
3.1 Main Brush Installation
- Flip the robot vacuum cleaner over.
- Locate the main brush cover, usually secured by clips or latches.
- Open or remove the main brush cover.
- Remove the old main brush.
- Insert the new main brush, ensuring its ends align with the slots in the vacuum cleaner.
- Close or reattach the main brush cover until it clicks into place.

Figure 3.1: The main roller brush, designed for effective debris collection.
3.2 Side Brush Installation
- Flip the robot vacuum cleaner over.
- Locate the side brush(es), typically held by a screw.
- Unscrew and remove the old side brush.
- Place the new side brush onto the post and secure it with the screw.
3.3 Filter Installation
- Open the dustbin compartment of your robot vacuum cleaner.
- Remove the dustbin.
- Open the filter cover on the dustbin.
- Remove the old filter(s).
- Insert the new HEPA filter(s) into the designated slot, ensuring a snug fit.
- Close the filter cover and reinsert the dustbin into the vacuum cleaner.

Figure 3.2: Two HEPA filters, designed to capture fine dust and allergens.
3.4 Wheel Installation
- Flip the robot vacuum cleaner over.
- Locate the caster wheel assembly.
- Gently pull the old wheel assembly straight up to remove it.
- Insert the new caster wheel assembly by pushing it firmly into the slot until it clicks into place.

Figure 3.3: The caster wheel, providing mobility and navigation for the robot vacuum.
3.5 Main Brush Cover Installation
- Ensure the main brush is correctly installed.
- Align the new main brush cover with its designated slot on the vacuum cleaner.
- Press down firmly until the cover snaps into place, securing the main brush.

Figure 3.4: The main brush cover, protecting the main brush and securing it in place.
4. Maintenance
Regular maintenance of your robot vacuum's parts is crucial for optimal performance. Consider the following:
- Filter Replacement: Filters should be replaced frequently (e.g., every 1-3 months, depending on usage) to maintain air quality and prevent reduced suction power.
- Brush Cleaning: Periodically remove and clean the main brush and side brushes to remove tangled hair and debris. This ensures effective cleaning and prevents motor strain.
- Wheel Cleaning: Check the caster wheel for any trapped debris that might hinder its movement.
- Timely Replacement: Replace damaged or worn-out parts promptly to ensure the robot vacuum operates efficiently and to prolong its overall service life.
5. Troubleshooting
If you encounter issues after replacing parts, consider these general troubleshooting steps:
- Part Not Fitting: Double-check that you have the correct replacement parts for your specific robot vacuum model (Xiaomi Roborock/Xiaowa E20, E202, E202-00).
- Reduced Performance: Ensure all parts are installed correctly and securely. A loose brush or clogged filter can impact cleaning efficiency.
- Unusual Noises: Verify that no debris is caught in the brushes or wheels, and that all parts are properly seated.
If problems persist, refer to your robot vacuum's original user manual or contact the seller for further assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | CONTIA |
| Compatible Models | Xiaomi Roborock / Xiaowa E20, E202, E202-00 |
| Item Model Number (Manufacturer) | WJJ-11-07 |
| Item Weight (Kit) | 1.76 ounces |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches |
| Reusability | Brushes and wheel are reusable after cleaning; filters are typically disposable. |
7. Warranty and Support
This product is provided without a specific warranty. For any questions regarding the installation or compatibility of these replacement parts, please contact the seller directly through your purchase platform.