1. Introduction
Thank you for choosing the Xiaomi Robot Vacuum H40. This manual provides essential information for the safe and efficient use of your robot vacuum cleaner. Please read this manual carefully before use and retain it for future reference.

The Xiaomi Robot Vacuum H40 is designed to provide comprehensive cleaning, from vacuuming and mopping to automatic dust collection, making your cleaning routine smarter and more convenient.
2. Safety Information
Always follow basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and personal injury. This includes:
- Read all instructions before using the appliance.
- Do not allow children to operate the robot vacuum. Supervise children and pets when the appliance is in operation.
- Ensure the power adapter is compatible with your local voltage.
- Do not use the appliance on wet surfaces or to pick up liquids.
- Keep hair, loose clothing, fingers, and all parts of the body away from openings and moving parts.
- Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
- Turn off the appliance before performing any maintenance or cleaning.
3. Package Contents
Verify that all items are present and in good condition upon opening the package:
- Xiaomi Robot Vacuum H40 (Main Unit)
- Automatic Dust Collection Docking Station
- Side Brush
- Dust Bags (Disposable)
- Charging Adapter
- Instruction Manual
4. Product Overview
Familiarize yourself with the components of your Xiaomi Robot Vacuum H40.

Key features include powerful 10,000Pa suction, anti-tangle brush technology, a 4L large capacity dust bag for automatic collection, simultaneous vacuuming and mopping, a 5200mAh battery, LDS smart navigation, and app control.
5. Setup
5.1 Charging the Robot Vacuum
Before first use, fully charge the robot vacuum. Place the docking station against a wall with adequate clear space around it. Connect the charging adapter to the docking station and a power outlet. Place the robot vacuum onto the docking station to begin charging.

The robot vacuum automatically returns to its docking station when the battery is low, ensuring it is always ready for the next cleaning cycle.
5.2 Installing the Mi Home/Xiaomi Home App
Download the Mi Home/Xiaomi Home app from your device's app store. Follow the in-app instructions to add your Xiaomi Robot Vacuum H40 and connect it to your home Wi-Fi network. The app allows for remote control, scheduling, and advanced cleaning settings.
6. Operation
6.1 Starting a Cleaning Cycle
Press the power button on the robot or use the Mi Home/Xiaomi Home app to start a cleaning cycle. The robot will automatically map your home using its LDS smart navigation system and plan an efficient cleaning path.

The robot vacuum adapts to various cleaning scenarios, including pet hair removal, mopping, and detailed cleaning around furniture.
6.2 Cleaning Modes and Settings
The robot vacuum offers various cleaning modes and customizable settings via the app:
- Suction Power: Adjust suction levels (Silent, Standard, Strong, Turbo) to suit different floor types and debris. The H40 features a powerful 10,000Pa suction fan blower.
- Mopping: Utilize the 3-stage smart water supply control for effective mopping.
- Zone Cleaning: Select specific areas for cleaning.
- No-Go Zones: Set virtual boundaries to restrict cleaning in certain areas.
- Carpet Settings: Customize how the robot interacts with carpets (e.g., avoid, cross, vacuum only).

Customize carpet cleaning preferences through the app for precise cleaning.
6.3 Obstacle Avoidance and Navigation
The robot vacuum is equipped with LiDAR navigation for accurate mapping and obstacle detection. It can detect and avoid drops, such as stairs, and navigate over door sills up to 20mm.

The robot can navigate over door sills up to 20mm, ensuring comprehensive coverage.
6.4 Voice Control
The Xiaomi Robot Vacuum H40 supports voice control via Amazon Alexa and Google Assistant. Link your robot vacuum to your smart home assistant for convenient hands-free operation.
7. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your robot vacuum.
7.1 Automatic Dust Collection
The H40 features an automatic dust collection system with a 4L dust bag, reducing the frequency of manual emptying. The system can hold up to 90 days of debris, minimizing contact with dust.
7.2 Cleaning Brushes
The main and side brushes are designed with anti-tangle technology to prevent hair from wrapping around them. Periodically check and clean the brushes to remove any accumulated hair or debris.
7.3 Water Tank and Mopping Pad
Empty and clean the water tank after each mopping session. Wash the mopping pad regularly to maintain cleaning effectiveness.
8. Troubleshooting
If you encounter issues with your robot vacuum, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Robot does not turn on | Low battery; Power button not pressed | Charge the robot; Press and hold the power button |
| Robot cannot return to charging dock | Docking station obstructed; Robot too far from dock | Clear obstacles around dock; Manually place robot near dock |
| Poor cleaning performance | Brushes tangled; Dust bag full; Filter clogged | Clean brushes; Replace dust bag; Clean/replace filter |
| App connection issues | Incorrect Wi-Fi password; Router issues | Verify Wi-Fi password; Restart router and robot; Re-pair device in app |
9. Specifications
Technical specifications for the Xiaomi Robot Vacuum H40:
| Feature | Detail |
|---|---|
| Brand | Xiaomi |
| Model Name | H40 |
| Model Number | OV51JCZ |
| Product Dimensions (L x W x H) | 16 x 32.6 x 34 cm |
| Product Weight | 3.64 kg |
| Color | White |
| Special Features | LiDAR Navigation, Cordless, Scheduling, Smart Mapping, No-Go Zone |
| Controller Type | App Control, Remote Control, Voice Control |
| Battery Composition | Lithium Ion |
| Voltage | 100V (AC), 20V (AC) |
| Dust Bag Capacity | 4 Liters |
| Batteries Included | Yes |
| Manufacture Year | 2026 |
| Country of Origin | China |
| Manufacturer | Xiaomi Communications Co., Ltd |
10. Warranty and Support
For warranty information and customer support, please refer to the warranty card included in your package or visit the official Xiaomi website. You can also contact Xiaomi customer service for assistance with product inquiries, troubleshooting, and service requests.
Please retain your proof of purchase for warranty claims.





