How to find and repair a wire break in your Automower® installation

If the charging station for your Automower® robotic lawn mower is displaying a blue flashing light and the Automower® Connect app or the mower display shows the error message No loop signal, there might be a damaged wire in your installation. You can perform some basic checks before starting with the troubleshooting. If these checks are unsuccessful, we will show you the necessary steps to identify and repair the damaged wire section.

Initial checks

Before diving into troubleshooting, perform the following visual checks:

  1. Ensure that the boundary wire and guide wire connectors to the charging station are properly connected and undamaged. See How to connect the boundary and guide wires to the charging station.

  1. Check the known splices in the loop wire to ensure that the wires are properly connected and that the couplers are not damaged. If available, use the map that was drawn during the installation to remind you where the wires were initially laid.

  1. If the error message persists after these initial checks, proceed with the troubleshooting steps below.

How to find a wire break

We recommend two methods to find a wire break:

Manual search

A broken wire in your Automower® installation can be found using a manual search method, where the basic idea is to keep splitting the boundary wire into halves until the damaged section is found. Here’s how to do it:

1. Switch off ECO mode

This search method won’t work if ECO mode is activated. Depending on your Automower® model, you can use the Automower® Connect app or the mower’s display to switch off ECO mode. Follow these steps:

  1. Place the mower in the charging station.
  2. Open the Automower® Connect app or press Menu on the mower’s display.
  3. Select Settings > ECO mode.
  4. Untick the box.

2. Switch connectors in the charging station

  • Switch the connections between the guide wire and boundary wire in the charging station to identify the damaged section.
  • Start by switching connection AL and G1. If the indicator lamp is lit with a solid green light, the break is somewhere on the boundary wire between AL and the point where the guide wire is connected to the boundary wire (thick black line in Image 1). This is where you should start looking for the break.
  • Note that some Automower® models have additional guide wires (G2, G3). You can repeat the procedure with them.

Image 1

3. Locate the break

To locate the damaged section of wire, you will need the following items:

  • Loop wire
  • Automower® couplers
  • Automower® connectors
  • Pliers
  • Wire cutting tool

Follow these steps:

  1. Disconnect the suspected damaged wire from the charging station.
  2. Connect one end of the new loop wire to a vacant slot on the charging station, either AL or AR, using a connector.
  3. Go to the middle of the suspected damaged section and cut it.
  4. Connect the other end of the new loop wire to the wire end that is still connected to the charging station (thin line in Image 2).
  5. Check the charging station indicator lamp.
  6. If the lamp is green, the break is in the section with the disconnected end (thick line in Image 2).
  7. Repeat this process until only a short section of the wire remains. This is where the break is located.

Tip! If the suspected damaged boundary wire section is short, it may be easier to replace it entirely than to try locating the exact location of the break.

Image 2

Image 3

Manual search with a wire break detector tool

To save time and avoid cutting any wires while troubleshooting, you can use a wire break detector tool. Note that this tool is useful for finding clean wire breaks, but may not be as effective with partial wire breaks.

Watch this video demonstrating how to use a wire break detector tool for searching for a boundary wire break in an Automower® installation (only available in English).

How to repair a damaged wire

Once you have located the damaged section of wire, you can proceed with the repair. You will need:

  • Loop wire
  • Automower® couplers
  • Pliers
  • Wire cutting tool

1. Trim the damaged wire

Trim about 60 centimetres (2 feet) from each end of the damaged wire to remove all damaged sections.

2. Insert the wire into the coupler

Insert both wire ends into the coupler, one end per hole. It doesn’t matter which hole is used for which wire end.

3. Check the wire insertion

Ensure that the wires are fully inserted into the coupler; use the transparent side of the coupler for verification.

If you are using PRO wire, remove the outer protective layer before inserting the wire into the coupler.

4. Press the coupler

Firmly press the coupler with pliers.

Watch this video for detailed instructions on how to connect a guide wire to the boundary wire:

5. Fix or bury the wire

Prevent new wire damage by burying the exposed boundary wire and coupler or securely fixing it to the ground with staples.

Why use an original Automower® coupler?

Automower® coupler is especially designed for repairing and extending the boundary wire and connecting the guide wire. It is durable, waterproof and ensures optimal performance.

Prevent wire break

There are some simple things you can do to prevent wire break in your Automower® installation. Click here to learn more.

Get professional help

If you need help with your Automower® installation, contact your local Husqvarna dealer. With their experience and using specialised tools, they can help you to get your Automower® robotic lawn mower working again in no time.

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