Trouble Shooting; Fault Messages - Husqvarna 420 Operator's Manual

9 Trouble Shooting

In this chapter, we have listed a number of messages which may be shown in the display if there is a malfunction.
There is a proposal as to the cause and steps to take for each message.
This chapter also presents some symptoms that can guide you if the robotic lawnmower does not work as expected.
More suggestions for steps to take in the event of malfunction or symptoms can be found on www.automower.com.

9.1 Fault Messages

A number of fault messages are listed below that can be shown on the display on the robotic lawnmower. Contact your
local dealer if the same message appears often.
Message
Wheel motor blocked,
left
Wheel motor blocked,
right
Blade motor blocked
Cutting height blocked
No loop signal
English - 80
1157866-26,420,430X,450X,EN_160314.indd 80
TROUBLE SHOOTING
Cause
Grass or other object has wrapped
around the drive wheel.
Grass or other object has wrapped
around the drive wheel.
Grass or other object has wrapped
around the blade disc.
The blade disc is lying in a pool of
water.
Grass or other object has wrapped
around the cutting height adjustment
or between the blade disc and
chassis.
Power supply not connected.
The low voltage cable is damaged or
not connected.
The boundary wire is not connected
to the charging station
Boundary wire broken.
ECO mode is activated and the
robotic lawnmower has attempted to
start outside the charging station.
The boundary wire is laid in the
wrong direction around an island.
Connection failed between the robotic
lawnmower and the charging station.
Disturbances from metal objects
(fences, reinforcement steel) or
buried cables close by.
Action
Check the drive wheel and remove the grass or
other object.
Check the blade disc and remove the grass or
other object.
Move the robotic lawnmower and if possible
prevent the collection of water in the working area.
Check the blade disc and the bellows around the
cutting height adjustment and remove any grass
or other objects that may have got stuck.
Check the wall socket connection and whether an
earth-fault breaker has tripped.
Check that the low voltage cable is not damaged.
Also check that it is properly connected to the
charging station and to the power supply.
Check that the boundary wire connector is fitted
properly to the charging station. Refer to 3.5
Connecting the Boundary Wire page 27.
Search for the brake see 9.5 Finding Breaks
in the Loop Wire on page 87. Replace the
damaged section of the loop with a new search
wire and splice using an original coupler.
Park the robotic lawnmower in the charging
station and press START and close the hatch,
see 6.9 Settings on page 61.
Check that the boundary wire has been laid
according to the instructions, see 3 Installation on
page 16.
Place the robotic lawnmower in the charging
station and generate a new loop signal, see 6.5
Security on page 47.
Try moving the boundary wire.
2016-03-14 17:00:03