Symptom - Husqvarna 420 Operator's Manual

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9.4 Symptom

If your robotic lawnmower does not work as expected, follow the troubleshooting guide below.
There is a FAQ (Frequently Asked Questions) on www.automower.com which provides more detailed answers to a
number of standard questions. It you still cannot find the reason for the fault, contact the local dealer.
Symptom
The robotic
lawnmower has
difficulty docking
with the charging
station
Uneven mowing
result
The robotic
lawnmower runs at
the wrong time
1157866-26,420,430X,450X,EN_160314.indd 85
TROUBLE SHOOTING
Weak signal as the boundary wire is
too long. Max length is 800 meters.
Defective circuit board in the
charging station
Cause
The charging station is on a slope
The boundary wire is not laid
correctly by the charging station.
The robotic lawnmower works too
few hours per day.
The shape of the working area
requires manual settings to be made
for the robotic lawnmower to find its
way to all remote areas.
Working area 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.
The robotic lawnmower clock needs
to be set.
The start and stop times for mowing
are incorrect.
No steps have to be taken if the robotic
lawnmower operates as expected.
Shorten the boundary wire by reducing the
working area or replacing islands with barriers the
robotic lawnmower can collide with.
Contact the local dealer.
Action
Place the charging station on a surface that is
entirely level. Refer to 3.2 Installation of Charging
Station page 17.
Check that the charging station has been
installed according to the instructions, see 3.2
Installation of Charging Station on page 17.
Increase the working hours, see 6.3 Timer on
page 43.
The Weather timer senses that the lawn has
been mowed more than it actually has. Increase
the intensity level in the Weather timer. Shut
down the Weather timer if this does not help.
Also use Lawn coverage > More to steer the
robotic lawnmower to one or more remote
areas, see Installation on page 79.
Try to limit the working area or extend the
working time, see 6.3 Timer on page 43.
Replace all the blades and screws so that the
rotating parts are balanced, see 8.7 Blades on
page 78.
Increase the cutting height and then lower
successively.
Check that the blade disc skid plate rotate easily.
If not, unscrew the blade disc and remove grass
and foreign objects, see 8.5 Transport and
Moving on page 77.
Set the clock, see 6.9 Settings on page 61.
Readjust the start and stop time setting for
mowing, see 6.3 Timer on page 43.
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2016-03-14 17:00:04