Problems Caused by Boundary Wire Faults – and How to Fix Them

Common Faults and Troubleshooting

Error Codes and Messages:
Robot lawn mowers often display specific error codes related to boundary wire issues or when the robot’s operation is obstructed.

Note that the indicator light on the charging station should be steadily green. If it flashes red, this indicates poor connections or a wire break.

1. No signal detected – E11
   • Cause: Wire break or faulty connection.
   • Solution:
     1. Inspect the wire for visible damage or breaks.
     2. Use a cable tester to locate the break.
     3. Repair using waterproof connectors or repair kits.
2. “Weak signal”, the machine makes periodic errors, sometimes runs in circles and stops mid-lawn due to lack of signal from the boundary wire.
   • Cause: Long cable runs, interference, or moisture.
   • Solution:
     1. Start by checking the machine’s driving log in the app for error messages. If related to the boundary wire, proceed with the following points.
     2. Check that the total cable length does not exceed the manufacturer’s limits.
     3. Investigate if nearby devices are causing electromagnetic interference.
     4. Check for moisture in connectors or cables, as this can cause oxidation and signal problems. Replace defective connectors and repair damaged cable areas.
     5. Tighten the boundary wire behind the charging station.
     6. Avoid excess boundary wire being coiled behind the charging station.
     7. Ensure that the boundary wire is not lying too close together and interfering with the signal (see the manual for the recommended spacing for your model).
3. “Lawn mower runs outside the area” – E1
   • Cause: Incorrect cable placement or signal interference.
   • Solution:
     1. Adjust the boundary wire to ensure proper coverage.
     2. Check if similar products are installed in the area as they can cause signal interference, e.g., at a neighbour’s. Adjust the distance between boundary wires and charging stations according to the manual for your model.
4. “Intermittent connection”
   • Cause: Loose joints or physical damage to the boundary wire.
   • Solution:
     1. Repair breaks in the cable again.
     2. Replace worn or corroded connectors.
     3. Check the output terminal and boundary wire ends for corrosion/rust.

       5. Alternative Solutions
                      Check the charging station for insects:

1. Insects can often find their way into the charging station, which can cause blockages or disruptions in its function. The inspection should include the following:
2. -Inside the charging station: Check for cobwebs, dead insects or live pests that may affect the electrical components.
3. -Ventilation openings: Ensure that ventilation openings are free from blockages such as insects or dirt.
4. -Charging points: Inspect the charging contacts for insect residues that may prevent proper charging.
5. -General area around the charging station: Inspect the area around the station for insect nests or signs of activity that could lead to recurring problems.

Note! A test area is an effective method for diagnosing faults in the boundary wire by setting up a test area (approx. 2 m x 1.5 m) on a small scale and testing the robot within this area.
If the machine works well in the test area, the fault is likely in the boundary wire in the garden.