1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your YARD FORCE SA900B Robotic Lawn Mower. Please read this manual thoroughly before first use and keep it for future reference.
The YARD FORCE SA900B is designed to maintain lawns up to 900 m² with features like a powerful 28V 2.9Ah Lithium-ion battery, a brushless motor for quiet and powerful cutting, and Bluetooth connectivity for app control.
2. Safety Instructions
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury.
- Read all instructions carefully before operating the robotic lawn mower.
- Keep hands and feet away from the cutting blades.
- Do not operate the mower in wet conditions or during rain. The mower is equipped with a rain sensor.
- Ensure the boundary wire is correctly installed and secured to prevent tripping hazards.
- Turn off the mower and remove the safety key before performing any maintenance or cleaning.
- Keep children and pets away from the working area of the mower.
3. Package Contents
Verify that all items are present in the package:
- 1x Robotic Lawn Mower
- 1x Charging Station
- 160 m Boundary Wire
- 200 pcs Fixing Pegs
- 9 m Power Cable
- 9 pcs Replacement Blades
- 3 pcs Replacement Screws
- 3 pcs Cable Connectors
- 1x Spacer Ruler
- 1x User Manual (this document)
Image: The YARD FORCE SA900B robotic lawn mower with its charging station, boundary wire, fixing pegs, power cable, replacement blades, screws, and cable connectors.
4. Setup
4.1. Charging Station Placement
Place the charging station on a flat, level surface in an area with good Wi-Fi signal if you plan to use the app. Ensure there is at least 1 meter of clear space to the front and 0.5 meters to the sides of the station.
4.2. Boundary Wire Installation
The boundary wire defines the mowing area. Lay the wire around the perimeter of your lawn, securing it with the provided fixing pegs. Ensure the wire is taut and buried or securely pegged to prevent damage. Leave sufficient distance from obstacles and edges as specified in the detailed installation guide.
Image: The YARD FORCE SA900B robotic lawn mower in action, demonstrating its ability to cover areas up to 900 m².
4.3. Initial Charging
Connect the charging station to a power outlet. Place the robotic mower onto the charging station. The mower will begin charging automatically. Allow the mower to fully charge before its first operation (approximately 60 minutes for a full charge).
5. Operating the Mower
5.1. Manual Operation
To start the mower manually, press the START button on the control panel. The mower will begin its mowing cycle according to its programmed schedule or default settings.
5.2. Bluetooth App Control
The YARD FORCE SA900B can be controlled via a dedicated smartphone app using Bluetooth. Download the "Yard Force" app from your device's app store. Follow the in-app instructions to pair your mower. The app allows for remote control, scheduling, and monitoring of the mower's status up to 50 meters away.
Image: The YARD FORCE SA900B highlighting its brushless motor and easy operation via Bluetooth and smartphone app.
5.3. Cutting Height Adjustment
The cutting height can be adjusted between 20 mm and 60 mm in 5 levels. Locate the cutting height adjustment knob on the mower and rotate it to your desired setting.
5.4. Mulching Function
The mower features a mulching system that finely cuts grass clippings and distributes them back onto the lawn. This acts as a natural fertilizer, promoting a healthier lawn.
5.5. Edge Cutting Function
The SA900B includes an edge-cutting function to ensure a neat and tidy finish along the borders of your lawn.
6. Maintenance
6.1. Blade Replacement
Regularly inspect the blades for wear and damage. Replace dull or damaged blades using the provided replacement blades and screws. Always wear protective gloves and ensure the mower is turned off and the safety key is removed before handling blades.
6.2. Cleaning
Clean the mower regularly, especially the cutting deck and wheels, to prevent grass buildup. Use a soft brush or cloth. Do not use high-pressure water jets directly on the mower.
6.3. Battery Care
The mower uses a 28V, 2.9Ah Lithium-ion battery. For optimal battery life, store the mower in a dry, cool place during off-season and ensure the battery is partially charged (around 50%) before long-term storage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mower not starting | Battery low; Safety key not inserted; Mower stuck. | Charge battery; Insert safety key fully; Clear obstruction. |
| Mower not charging | Charging station not powered; Mower not correctly docked. | Check power connection; Re-dock mower ensuring contacts align. |
| Uneven cutting | Dull blades; Incorrect cutting height setting. | Replace blades; Adjust cutting height. |
| Mower gets stuck frequently | Uneven terrain; Obstacles in mowing area. | Level terrain where possible; Remove obstacles; Adjust boundary wire. |
8. Specifications
- Model: SA900B
- Battery: 28V, 2.9Ah Lithium-ion
- Cutting Width: 180 mm (18 cm)
- Cutting Height: 20 mm - 60 mm (5 levels)
- Max. Lawn Area: Up to 900 m²
- Max. Incline: 40%
- Motor Type: Brushless
- Control: Bluetooth App & On-board Panel
- Product Dimensions (L x W x H): 57 x 39 x 26 cm
- Weight: 8.5 kg
- Material: Plastic
Image: A detailed front view of the YARD FORCE SA900B robotic lawn mower, showcasing its design.
9. Warranty and Support
Yard Force products are designed for reliability and durability. This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions.
Spare parts availability for this model is stated to be 5 years from the date of purchase.
For technical support, spare parts, or warranty claims, please contact Yard Force customer service. Contact information can typically be found on the official Yard Force website or on your purchase receipt.
Note: The repairability index for this product is available for guidance.
Image: The official Yard Force logo.
