Yard Force NX100i Robotic Mower Operator's Manual

Yard Force Customer Service is available to provide assistance. In the case of a damaged or missing part, most replacement parts ship directly from our facility. For immediate help with assembly, or for additional product information, please visit YardForceUSA.com or email support@MerotecUSA.com.

SAVE THIS MANUAL FOR REFERENCE

You will need this manual for safety instructions, operating procedures, and warranty information. The original sales receipt is required for warranty service.

Boundary Wire Installation Guidelines

The following guidelines ensure optimal performance and safety when installing the boundary wire:

• Maintain a minimum distance of 12 inches (approx. 30 cm) from lawn edges, obstacles, and paths.
• Clear lawn areas of small rocks (less than 4 inches high) and stones with round or sloped edges. Larger rocks or those that might cause the mower to get stuck require exclusion with the boundary wire.
• For trees with exposed roots lower than 4 inches, use the boundary wire to exclude the area to protect the mower's blades and wheels.
• The Robotic Mower can navigate slopes up to a maximum of 40% incline or decline.
• The boundary wire should not be placed perpendicular to inclines exceeding 10%. Maintain a strip of at least 6.5 feet (approx. 2 meters) between slopes of 10% or steeper and the boundary wire to prevent the mower from going over the wire, especially on wet ground.
• For paths, driveways, or roads, allow a safety distance of 12 inches (approx. 30 cm) between the driveway and the boundary wire. If a driveway is elevated, it is recommended to keep it outside the mowing area.
• If creating a boundary corridor for access (e.g., to a driveway), ensure it is at least 6.5 feet wide and a maximum of 26 feet long.
• When installing boundary wire around flowerbeds, two options exist: keep wires more than 2 inches apart (mower treats as an obstacle) or less than 2 inches apart (mower crosses, requires an obstacle on the wire).
• Exclude ponds and pools from the cutting area. A fence around pools is recommended for added safety.
• When installing pegs for the boundary wire, maintain approximately 30 inches (approx. 75 cm) spacing in straight lines, and less in tight curves. Ensure pegs' hooks and wire slits face outwards from the boundary.
• For neighbors using similar mowers, maintain a distance of at least 20 inches (approx. 50 cm) between boundary wires and position docking stations at least 33 feet (approx. 10 meters) apart. Use different signal settings (S1/S2) if necessary.

Safety Instructions

Safety Symbols: Symbols are used to draw attention to potential dangers. Always read and understand their explanations.

• Caution! These instructions must be read. [!]
• Danger of injury due to flung-out material! Keep bystanders well away from the machine.
• WARNING - Do not ride on the machine.
• CAUTION - Do not touch rotating blade.
• WARNING Keep your hands and feet away from the rotating blades. Never place your hands or feet close to or under the body when the Robotic Mower is in operation.
• Class III equipment [Symbol for Class III electrical equipment]

General Safety Warnings:

• This machine can cause serious injuries. Follow instructions to reduce risk of accident and injury.
• Preparation: Read and understand all instructions. Ensure familiarity with controls and proper use. Never allow children or persons with reduced physical, sensory, or mental capabilities, or lack of experience to use the machine without supervision. Local regulations may restrict operator age. The operator is responsible for accidents involving others or their property. Periodically inspect the mowing area for debris. Inspect blades, bolts, and cutter assembly for wear or damage, replacing them in sets to preserve balance. Never leave the machine unattended, especially with children or pets present. Never use the machine to level uneven patches. If blades are dull or the motor is overloaded, check and replace worn parts.
• Use: Do not put hands or feet near or under rotating parts. Never pick up or carry the machine while the motor is running. Remove the plug from the mains before clearing blockages, checking, cleaning, or maintaining the machine, or after striking an object. Start the mower only after ensuring hands and feet are clear of rotating blades. Never lift or carry the mower with the main power switch ON. Do not let untrained persons use the mower. Do not place objects on the mower or docking station. Do not use the mower with defective parts. Avoid operating in wet grass.
• Work Interruptions: The cutting cylinder may continue to rotate briefly after the machine is turned off. Keep hands and feet away. Switch off the device and remove blockages only when the machine is completely still. Switch off the power when transporting, lifting, or tilting the machine.
• Electrical Safety: Before each use, inspect power and extension cords for damage. Connect to a power socket with a residual-current circuit breaker (max 30 mA). Keep extension cables away from cutting tools. If a power cable is damaged, disconnect it from the mains immediately and do not touch it. The supply cord cannot be replaced; if damaged, the appliance should be scrapped. Keep extension cables away from blades and moving parts. Check that the mains voltage matches the rating plate.
• Transport: Use original packaging for long distances. Press the STOP button, switch the main power OFF, and carry using the rear handle, keeping the blade disc away from your body.
• Product Safety Warnings: Do not touch moving parts until they have stopped. Do not store heavy items on the mower or docking station. Never use the device if the main power switch is damaged or malfunctions. Set the main power switch to OFF for storage or when not in use.
• Lightning Protection: To prevent lightning damage, do not place the docking station under tall trees.

Parts List

The Robotic Mower includes the following components:

• 1. STOP button
• 2. Ultrasonic sensor
• 3. Charging inlet
• 4. Rear wheel
• 5. Height adjustment dial
• 6. Control panel
• 7. Blade plate
• 8. Carry handle
• 9. Power switch button

Scope of Delivery: Robotic Mower, Docking station, Switching Power Supply, Extension cord, Wire pegs, Spare blades, Connectors, Boundary wire, Measurement ruler, Manuals.

Intended Use

The Robotic Mower is exclusively designed for mowing lawns for private use. Any other use not specified in these instructions can result in damage to the mower and pose a serious danger to the user. This appliance must not be used by children or persons with reduced physical, sensory, or mental capabilities, or lack of experience, unless supervised or instructed by a responsible person. The owner or operator is responsible for accidents or harm to others and their property. The manufacturer is not liable for damage caused by incorrect operation or use outside the intended purpose.

Technical Specifications

Model: NX 100i

Max cutting area: 1/3 Acre

Battery pack: 28 V / 2850 mAh

Switch power supply: Input: 100-120 VAC, 50/60 Hz, 56 W; Output: 32V, 1.5 A

Power supply model: FY3201500S3

Mowing time on one charge: 80 min

Rated voltage: 28 V

Rated power: 50 W

No load speed: 3500 min⁻¹

Cutting width: 7 in

Cutting height: 1-1/3" - 3"

Charging time: 90 min

Blade model: 846210

Weight: 18.7 lb

Frequency Band: 0-148.5 kHz

Magnetic Field Strength: 70 dBuA/m

Wifi Frequency Band: 2400~2483.5MHz

Wifi Magnetic Field strength: 20dBm

Max sound pressure level: LpA=53 dB, K=3 dB

Max sound power level: LwA=64 dB, K=3 dB

Degree of protection: Robotic Mower: IP24; Switching power supply: IP67, Plug IP44

Spare parts: Spare Blades (9 Pcs), Boundary pegs (220 Pcs), Boundary wire (720'), Connectors (6 Pcs).

WARNING: For recharging the battery, only use the detachable supply unit provided with this appliance.

Assembly and Installation

This chapter explains how to install the Robotic Mower. Please read this completely before starting.

Introduction

Create a drawing of your lawn, including obstacles, to plan the docking station position and boundary wire layout. Tools needed: hammer, wire cutters, pliers, or scissors.

Pre-Cut Your Lawn

Prepare your lawn by pre-cutting it to a height of 2.5 inches.

Cutting Limitations

The mower uses collision sensors to detect rigid obstacles over 4 inches high (walls, fences, furniture). Upon detection, it stops, backs up, and changes direction. For long-term solutions, lay the boundary wire to protect obstacles. Ensure the mower is never more than 65 feet from the boundary wire.

Trees

Treat trees as obstacles. If tree roots are exposed and lower than 4 inches, exclude this area with the boundary wire to protect the roots, blades, or rear wheels.

Stones

Clear small rocks (under 4 inches) and stones with round or sloped edges. The mower might try to climb such rocks, leading to it getting stuck and requiring user intervention. Contact with stones can damage the blades.

Slopes

The mower can navigate slopes up to 40% incline/decline. The boundary wire should not be perpendicular to inclines over 10%. Leave at least 6.5 feet between slopes of 10% or steeper and the boundary wire.

Paths, Driveways and Roads

If an elevated driveway crosses your lawn, keep it outside the boundary wire. Allow a 12-inch safety distance between the driveway and the boundary wire.

Driveway Crossing

If the driveway and lawn are at the same level, use the boundary wire to create a corridor for the mower to cross.

Uneven Lawn Surfaces

Uneven lawn areas can cause blades to touch the ground. Level the lawn or exclude uneven areas with the boundary wire.

Placing the Docking Station

Choose a location with a permanent mains connection, considering the nearest power outlet. Ensure 5 feet of straight wire to the front and 12 inches to the side of the docking station facing the cutting area for smooth return. A shaded location is beneficial for battery charging. Place the station on an even, flat surface away from ponds, pools, or stairs. Consider protection from elements (e.g., robot port or garage). Avoid placing too close to slopes. Ensure left and right inclination does not exceed 5 degrees.

Pegging Your Boundary Wire

Mow the lawn to 2.5 inches or less before laying the boundary wire. Burying the wire is optional; closer placement to the ground reduces tripping hazards. Use the included ruler for the 12-inch distance from obstacles. The recommended distance between pegs is about 30 inches in straight lines, less in curves. Ensure pegs' hooks and wire slits face outwards. Do not drive pegs fully into the ground initially; use a light hammer. Locate pegs at approximate distances from lawn edges (12 inches) and obstacles.

Flowerbeds

Use boundary wire to exclude flowerbeds. Options:

• Keep parallel wires more than 2 inches apart: The mower recognizes it as an obstacle and bounces off.
• Keep parallel wires less than 2 inches apart (do not cross wires): The mower crosses. Requires an obstacle (e.g., rock, pole) near position A, surrounded by a 3.3 ft x 3.3 ft flat area, to allow the machine to exit the circle.

Ponds and Pools

Exclude any pools from the cutting area. Submersion can severely damage electronic parts. A fence around pools is recommended.

Inventory and Garage

If a boundary corridor is created, it should be at least 6.5 feet wide and a maximum of 26 feet long. If too narrow or long, the mower may not navigate it.

Connect the Docking Station to the Boundary Wire

Run the boundary wire under the front of the docking station. Connect one end to the left (black) 'F' connector and the other end to the right (red) 'B' connector. Insert the mains plug into a properly installed socket. The blue LED confirms connection. Test the mower's function. Check the LED regularly. Place the mower near the docking station, set the main power switch to ON, and check the S1 signal. Press the unlock button (4 times) to unlock the panel.

After docking, the display shows "Charging", and S1/S2 indicators flash alternately. The mower remains in the station until fully charged. Secure pegs fully once docking is confirmed.

Neighboring Mowers

To prevent interference with neighbors' mowers, maintain a 20-inch distance between boundary wires and position docking stations at least 33 feet apart. Use different signal settings (S1 or S2) if necessary. Press the "signal" button on the charging station to switch to S2, then press the "S2" button on the control panel.

Signal Selection: The default signal is S1. Change to S2 if neighbor's signal causes interference.

Operation

Control Panel

The control panel features a keypad, menu buttons, and status indicators.

Initial Interface

After powering on and entering the default PIN 0000, the initial interface displays signal status, working time, and battery capacity.

Before Starting Your Robotic Mower

Adjust time settings:

1. Press the MENU button to enter the menu.
2. Press '1' for time setting.
3. Press '1' to set the system date (e.g., 2021-01-29).
4. Press '2' to set the system time (e.g., 13:57).
5. Press '3' to proceed to working date/time settings.
6. Press '1' to select the working date.
7. Press '2' to select the working time slot (e.g., 02:50-13:50).

NOTE: If a working day is activated, the cursor moves to the time setting.

Sensor Settings

• Ultrasonic Sensor: Detects obstacles. When activated, the robot stops, turns around, and resumes. Press '2' to switch off or select detection distance.
• Rain Sensor: Not recommended to mow in rain. The sensor stops the mower and returns it to the charging station. It will remain there until the rain stops. Be careful not to short-circuit sensors with metal objects. Press '2' to switch off or '3' to set extra delay time.

PIN Code

Set a passcode to prevent theft or unauthorized changes. The default is "0000". Enter the old PIN, then the new PIN twice. Press OK to confirm.

Language

Select your preferred language from the menu.

WiFi Settings

Options include Config (for APP connection), Status (current WiFi status), and Mode (Client Mode or Direct Mode).

Signal Setting

Set your required signal by pressing S1 or S2.

Cutting Height Adjustment

Adjust the cutting height using the dial on top of the machine, ranging from 1-1/3" to 3".

NOTE: For optimal performance, pre-cut lawns to below 2.5 inches before using the Robotic Mower.

Start Mowing

1. Press the unlock button (4 times).
2. Press the start button and close the lid. The mower will begin working.

Return to Docking Station

1. Press the unlock button (4 times).
2. Press the return button and close the lid. The mower will return to the docking station.

Emergency Stop

Press the STOP button to halt the mower at any time.

Maintenance and Storage

Maintenance not described here must be performed by an authorized servicing agency using original parts.

Maintenance

Regularly check and clean your mower. Replace worn parts as needed. Use a dry brush, damp cloth, or wooden piece. Never use flushing water. Proper maintenance extends the mower's service life.

Battery Life

The mower has a maintenance-free Li-ion battery with an estimated life of over 2 years, depending on usage.

Winter Storage

Store the mower, docking station, and power supply in a dry place (shed, garage, or indoors). Recharge the battery fully, set the main power switch to OFF, clean the mower, unplug power supply and disconnect boundary wire. Protect the boundary wire against corrosion with water-free grease or sealing tape. Repack in original packaging if possible. A winter service is available from the service center.

Preparing for Spring

Clean charging contacts on the mower and docking station using fine abrasion paper or a brass brush for optimal charging efficiency.

Cleaning the Mower Body

Remove dirt with a soft brush. Use a manual water spray with mild household detergent for intensive cleaning, then wipe with a moist rag.

Disposal

Dispose of the product and batteries responsibly according to local regulations. Batteries may contain toxic heavy metals and require special treatment.

Replacing the Battery

1. Ensure the main power switch is OFF. Clean the underside.
2. Set the mower to the lowest cutting height.
3. Turn the mower upside down. Remove the 5 screws from the battery compartment lid (one is under the blade protector).
4. Pull out and disconnect the battery.
5. Clean the lid and compartment edge.
6. Connect and insert the replacement battery, close the compartment, and secure the lid with screws. Do not turn on the mower before placing it back on its wheels. Beware of sharp blades!

Blade Maintenance

The mower has three blades. Blades typically last up to five months with everyday use. Weekly inspection of blades and screws is advised. Blades are double-edged; when blunt, loosen the screw, flip the blade, and re-fix. Ensure the blade moves freely.

A set of spare blades is included. Always replace all three blades simultaneously. Use only manufacturer-recommended spare parts.

Cleaning the Underside

With the power switch OFF and wearing gloves, turn the mower on its side. Clean the blade disc and frame with a soft brush or damp cloth. Rotate the blade disc to ensure free movement and that blades can pivot without obstruction.

Cleaning Contact Pins and Charging Strips

Use wire wool, metal cleaner, or fine emery paper to clean contact pins and charging strips on the mower and docking station. Remove debris for efficient charging.

Reversing or Replacing Blades

WARNING! Ensure the mower is completely shut off before cleaning, adjusting, or replacing blades. Always wear protective gloves.

WARNING! For maximum cutting efficiency and safety, use only recommended replacement blades and mounting parts.

Troubleshooting

Robotic Mower Cannot Dock with Docking Station

• Check that the boundary wire in front and underneath the charger is straight.
• Verify the docking station's position is suitable as per manual instructions.

Robotic Mower Runs in Circles or Returns to Docking Station

• Ensure no power cable runs parallel and close to the boundary wire; reposition if necessary.
• Check if a front wheel is stuck.
• If a neighbor has a similar mower, signals may interfere. Try setting your docking station and mower to the alternative boundary signal (S1 to S2).
• Driving motor may be damaged; contact customer support.

The Robotic Mower is Noisy

• Inspect and tighten blade fixing screws.
• Inspect blades for damage and replace if necessary.
• Grass may be too high; increase cutting height or pre-mow with a standard mower.
• Cutting motor failure; contact after-sales service.

Mower Remains at or Returns to Docking Station When Pressing START Button

• Check if the mower has completed its programmed working time for the day.
• Battery is low; the mower needs to be charged.

LED Signal Indicator on Docking Station

• S1/S2 indicator lights on: Boundary wire signal in good condition.
• S1/S2 indicator flashes: Boundary wire broken, no signal.
• S1/S2 indicator flashing alternately: Mower is charging in the docking station.

Charging Troubleshooting

Mowing Troubleshooting

Warranty

Yard Force Two-Year Limited Warranty

Keep your original purchase receipt as proof of purchase. Warranty coverage begins on the purchase date from an authorized retailer and applies only to the original purchaser. This warranty is valid for products purchased and used in the USA and Puerto Rico. Commercial use voids the warranty. It does not cover accidental damage, unreasonable use, normal wear and tear, neglect, or failure to follow operating, safety, and maintenance instructions. Unauthorized service or modifications will void the warranty. Only manufacturer/authorized parts and accessories may be used.

Ninety-Day Warranty (Accessories)

Accessories like blades are warranted against manufacturer defects for residential use for 90 days from the purchase date. This warranty does not cover loss of use or consequential damages, nor repairs attempted by unauthorized persons. It is void if the product is used for commercial, rental, or industrial purposes. Parts subject to normal wear and tear are excluded.

Service and Warranty Claims Process

Contact Yard Force Support Center toll-free at (866) 902-9690, Monday-Friday, 8:30 AM - 5:00 PM Eastern Time. Service agents can help troubleshoot problems. For service or warranty inspection:

1. Contact Yard Force USA at (866) 902-9690 or support@merotecusa.com.
2. Provide proof-of-purchase and serial number to confirm warranty coverage.
3. Yard Force USA will provide an RGA number for all communications and a list of authorized service centers if evaluation/repair is needed.
4. All shipments to Yard Force USA must have an RGA number clearly marked on the box; shipments without one will be refused.
5. Shipments must be pre-paid; Yard Force USA does not cover shipping costs for service or evaluation. Use a carrier that provides tracking.

For more information, call toll-free (866) 902-9690 or email support@merotecusa.com.

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