1. Introduction
The Yard Force Compact 400Ri robotic lawn mower is designed for automated lawn maintenance on areas up to 400m². This device features quiet operation, making it suitable for use at any time. It integrates iRadar technology with ultrasonic sensors for safe navigation and obstacle avoidance. Powered by a 20V 2Ah lithium-ion battery and a brushless motor, it offers efficient mowing with a runtime of up to 60 minutes. The mower includes adjustable rain sensors and automatically returns to its charging station when the battery is low or during rain. Its mulching function contributes to a healthier lawn by returning finely cut grass clippings to the soil.
Figure 1: Front view of the Yard Force Compact 400Ri Robotic Lawn Mower.
2. Safety Information
Read all safety warnings and instructions carefully before operating the robotic lawn mower. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- Children and Bystanders: Keep children, pets, and bystanders away from the mowing area while the robot is operating.
- Obstacles: Remove all objects such as stones, toys, and wires from the lawn before mowing to prevent damage to the mower and potential hazards.
- Blades: The blades are sharp. Always wear protective gloves when handling the blades or performing maintenance.
- Power Supply: Use only the original charging station and power adapter provided with the product.
- Wet Conditions: Avoid operating the mower in heavy rain or extremely wet conditions, unless the rain sensor is activated to return it to the charging station.
- Maintenance: Always switch off the mower and disconnect it from the power supply before cleaning, adjusting, or performing any maintenance.
3. Package Contents
Verify that all items listed below are present in the package:
- Yard Force Compact 400Ri Robotic Lawn Mower
- Charging Station
- Charging Cable / Power Adapter
- Perimeter Wire
- Perimeter Pegs
- Spare Blades (set)
- User Manual (this document)
4. Setup
4.1. Charging Station Placement
Select a flat area with access to a power outlet. Ensure there is at least 2 meters of straight perimeter wire before and after the charging station for proper docking. The station should be protected from direct sunlight and heavy rain if possible.
4.2. Perimeter Wire Installation
Lay the perimeter wire around the designated mowing area. The wire defines the boundaries for the robotic mower. Secure the wire with the provided pegs. Maintain a distance of approximately 35cm from edges and obstacles. For areas with flowerbeds or trees, create islands by routing the wire around them. Ensure the wire is connected securely to the charging station terminals.
4.3. Initial Charging
Connect the charging station to a power outlet. Place the robotic mower onto the charging station. Allow the mower to charge fully before its first operation. The charging indicator on the mower or station will confirm charging status.
4.4. App Connection
Download the dedicated Yard Force application from your smartphone's app store. Follow the in-app instructions to connect your Compact 400Ri to your home Wi-Fi network. This enables remote control and scheduling functionalities.
Figure 2: Remote control via the Yard Force mobile application.
5. Operating Instructions
5.1. Starting and Stopping
To start the mower, press the 'Start' button on the control panel or via the app. To stop, press the 'Stop' button. The mower will cease operation and can be manually returned to the charging station or sent via the app.
5.2. Mowing Schedules
Use the Yard Force app to set customized mowing schedules. You can define specific days and times for the mower to operate. The mower will automatically leave its charging station, mow, and return when finished or when the battery is low.
5.3. Rain Sensor Function
The integrated rain sensors detect precipitation. If activated, the mower will automatically return to its charging station when rain is detected and resume its schedule once the lawn is dry.
5.4. iRadar Obstacle Avoidance
The iRadar technology uses ultrasonic sensors to detect obstacles in the mowing path. Upon detection, the mower will slow down, change direction, and navigate around the obstacle, ensuring safe operation without collisions.
Figure 3: Side view of the mower, showing the iRadar sensor.
5.5. Mulching Function
The Compact 400Ri is designed for mulching. It finely cuts grass clippings and distributes them back onto the lawn. This process naturally fertilizes the grass, promoting a healthier and greener lawn.
Figure 4: The robotic mower maintaining a lawn.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your robotic lawn mower. Always switch off the mower and remove it from the charging station before performing any maintenance.
6.1. Blade Replacement
Inspect the blades regularly for wear and damage. Replace dull or chipped blades with new ones from the spare blade set. Use protective gloves and the appropriate tool to unscrew and replace the blades. Ensure all screws are tightened securely.
6.2. Cleaning
Clean the mower regularly, especially the underside, wheels, and charging contacts. Use a soft brush or cloth to remove grass clippings, dirt, and debris. Avoid using high-pressure water jets or solvents. Ensure the rain sensors and iRadar sensors are clean and unobstructed.
6.3. Battery Care
The mower is equipped with a lithium-ion battery. For long-term storage, ensure the battery is partially charged (around 50%) and store the mower in a cool, dry place. Avoid extreme temperatures.
7. Troubleshooting
This section addresses common issues you might encounter with your robotic lawn mower.
| Problem | Possible Cause | Solution |
|---|---|---|
| Mower does not start | Low battery; Safety switch off; Error message on display. | Charge battery; Check safety switch; Refer to display error code for specific action. |
| Mower stays in charging station | No schedule set; Rain sensor activated; Perimeter wire issue. | Set a mowing schedule via app; Check rain sensor status; Verify perimeter wire connection and integrity. |
| Mower gets stuck frequently | Obstacles on lawn; Uneven terrain; Perimeter wire too close to obstacles. | Clear lawn of debris; Adjust perimeter wire distance from obstacles; Ensure iRadar sensors are clean. |
| Poor mowing result | Dull or damaged blades; Infrequent mowing; Grass too long. | Replace blades; Increase mowing frequency; Mow with a traditional mower first if grass is very long. |
| App connection issues | Weak Wi-Fi signal; Incorrect network settings; App not updated. | Ensure strong Wi-Fi signal near charging station; Reconfigure network settings in app; Update app to latest version. |
8. Specifications
Technical specifications for the Yard Force Compact 400Ri Robotic Lawn Mower:
- Model: Compact 400Ri
- Brand: Yard Force
- Recommended Lawn Area: Up to 400m²
- Battery Type: 20V 2Ah Lithium-ion (included)
- Motor Type: Brushless
- Mowing Time per Charge: Approximately 60 minutes
- Charging Time: (Information not provided, typical for Li-ion)
- Cutting Width: 16 cm
- Adjustable Cutting Height: 2 cm - 5 cm
- Max Slope: 30%
- Navigation: iRadar Ultrasonic Sensors, Perimeter Wire
- Features: Rain Sensor, Lift Sensor, Obstacle Sensor, Mulching Function, App Control
- Product Dimensions (L x W x H): 44 x 38.4 x 20.6 cm
- Product Weight: 7.4 kg
- Material: Plastic
- Color: Orange
- Included Components: Robot, Charging Station, Charging Cable, Spare Blades, Perimeter Pegs, Perimeter Wire
9. Warranty and Support
9.1. Manufacturer's Warranty
Yard Force offers a 2+1 year manufacturer's warranty for the Compact 400Ri Robotic Lawn Mower. Please retain your proof of purchase for warranty claims. The additional year of warranty may require product registration on the official Yard Force website.
9.2. Customer Support
For technical assistance, spare parts, or warranty inquiries, please contact Yard Force customer support. Refer to the official Yard Force website or your purchase documentation for contact details specific to your region.
