Husqvarna 420 Operator's Manual page 59

Guide
Make sure Guide is checked. Otherwise use the right or
left arrow keys for marking and press OK.
Use the number keys to enter the delay time.
Automower ® 450X can have up to three guide wires and
Automower® 430X up to two guide wires.
Automower® 420 has only one guide wire.
Guide > Guide 1 delay
Move the cursor to Delay Guide 1 and enter the delay in
minutes.
The delay is normally specified as a figure between 0 and
10 minutes. Repeat this procedure if more than one guide
is being connected.
Boundary wire
Make sure the Follow boundary home checkbox is
marked. Otherwise use the right or left arrow keys for
marking and press OK.
Use the number keys to enter the delay time.
Move the cursor to Delay time and enter the delay in
minutes.
This time is normally longer than for any of the guides
as it is normally better if the robotic lawnmower follows
one of the guide wires home to the charging station. The
delay time is normally specified as a figure between 10
and 20 minutes but can be shorter if a guide wire is not
installed and it is unlikely that the robotic lawnmower can
find the charging station through an irregular search.
If the robotic lawnmower passes a guide wire when it is
following the boundary wire, it will interrupt the search
along the boundary wire and instead start following the
guide wire to the charging station.
If it is strictly inappropriate in the installation to follow the
boundary wire, the Follow boundary home checkbox must
be deactivated.
Charging station range
There may be reasons to reduce the range of the charging
station in rare cases. It may be necessary if for instance
the charging station is placed close to a bush or wall which
prevents the robotic lawnmower from docking with the
charging station despite making contact with the charging
station's signals. In these cases, it is normally better to
move the charging station, but if this is not possible, the
range of the charging station can be reduced.
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2016-03-14 16:59:27