Find Breaks In The Loop Wire - Husqvarna AUTOMOWER 420 Operator's Manual

Symptoms
The product is
parked for hours in
the charging station.
Uneven mowing re-
sults.

7.6 Find breaks in the loop wire

Breaks in the loop wire are usually the result of
unintentional physical damage to the wire such as when
gardening with a shovel. In countries with ground frost,
also sharp stones that move in the ground can damage
the wire. Breaks can also occur due to the wire being
stretched excessively during installation.
Mowing the grass too low right after the installation can
damage wire insulation. Damage to the insulation may
not cause disruptions until several weeks or months
later. To avoid this, always select the maximum cutting
height the first weeks after installation and then lower
the height one step at a time every second week until
the desired cutting height has been reached.
A damaged splicing of the loop wire can also lead to
disruptions several weeks after the splice was done.
A faulty splice can, for example, be the result of the
coupler not being pressed together hard enough with a
pair of pliers, or that a coupler of lower quality than the
original coupler has been used. Please first check all
known splices before further troubleshooting is done.
A wire break can be located by gradually halving the
distance of the loop where the break may have occurred
until there is only a very short section of the wire left.
1201 - 007 - 20.02.2023
Cause
The hatch is closed but the START button is
not pushed.
Parking mode is activated.
The product is not allowed to operate if the
battery temperature is too high or too low.
The product works too few hours per day.
The shape of the work area requires the use
Lawn coverage function for the product to
of
find its way to all remote areas.
How often? setting is incorrect in relation
The
to the layout of the work area.
The work area is too large.
Dull blades.
Long grass in relation to the set cutting
height.
Accumulation of grass by the blade disc or
around the motor shaft.
Action
Push the STOP button to open the hatch.
Enter the PIN code and confirm with the OK
button. Push the START button and then
close the hatch.
Change the operating mode. Refer to
ating modes - Park on page 35 .
Check that the charging station is placed in
an area with protection from the sun.
Increase the mowing time. Refer to
on page 24 .
Steer the product to a remote area. Refer to
Lawn Coverage on page 27 .
Check that the correct
selected.
Try limiting the work area or extending the
schedule. Refer to
Replace all the blades. Refer to
ment of the blades on page 37 .
Increase the cutting height and then succes-
sively lower it.
Check that the blade disc rotates freely and
easily. If not, screw off the blade disc and
remove grass and foreign objects. Refer to
Chassis and blade disc on page 36 .
The following method does not work if
activated. Make sure first that
off. Refer to ECO mode on page 30 .
1. Check that the indicator lamp in the charging
station flashes blue, which indicates a break in
the boundary loop. Refer to
charging station on page 45 .
2. Check that the boundary wire connections to the
charging station are properly connected and not
damaged. Check that the indicator lamp in the
charging station is still flashing blue.
Oper-
Schedule
How often? value is
Schedule on page 24 .
Replace-
ECO mode is
ECO mode is switched
Indicator lamp in the
Troubleshooting - 47