0478 131 8349 A - EN
80
Fault:
Display in a foreign language
Possible cause:
– Language setting has been changed
Remedy:
– Set the language (Ö 11.11)
Fault:
Brown (earthy) patches appear in the 
mowing area
Possible cause:
– Mowing duration is too long in relation 
to the mowing area
– Perimeter wire has been routed with 
excessively tight radii
– Size of mowing area set incorrectly
Remedy:
– Reduce the mowing duration (Ö 11.8)
– Correct the routing of the perimeter wire 
(Ö 9.10)
– Create a new mowing plan (Ö 11.8)
Fault:
Mowing operations are significantly 
shorter than usual
Possible cause:
– Grass is very high or too wet
– Machine (mowing deck, drive wheels) is 
very dirty
– Battery has reached end of service life
Remedy:
– Adjust the cutting height (Ö 9.6)
Set the rain sensor (Ö 11.12)
Change the active times (Ö 11.7)
– Clean the machine (Ö 16.2)
– Replace the battery – observe 
corresponding recommendation in the 
display (#), (Ö 23.)
Fault:
The robotic mower is docked, the battery is 
not charging
Possible cause:
– The battery does not need to be 
charged
– Docking station not connected to power 
supply
– Incorrect docking
– Charging contacts corroded
Remedy:
– No action necessary – battery charging 
occurs automatically below a certain 
voltage
– Check power supply to the docking 
station (Ö 9.9)
– Place the robotic mower in the mowing 
area and send it back to the docking 
station (Ö 11.5), check for correct 
docking – if necessary, correct the 
position of the docking station (Ö 9.1)
– Replace the charging contacts (#)
Fault:
Docking not working
Possible cause:
– Uneven entry area to docking station
– Dirty drive wheels or dirty floor plate
– Perimeter wire incorrectly routed in 
area of docking station
– Ends of perimeter wire not cut
Remedy:
– Level out the entry area to the docking 
station (Ö 9.1)
– Clean the drive wheels and the floor 
plate of the docking station (Ö 16.2)
– Re-route the perimeter wire – ensure 
correct routing in the area of the 
docking station (Ö 9.10)
– Cut the perimeter wire as described and 
route it without excess length – do not 
roll up protruding ends (Ö 9.11)
Fault:
The robotic mower travels past the 
docking station or docks at an angle
Possible cause:
– Wire signal affected by
– Perimeter wire incorrectly routed in 
area of docking station
Remedy:
– Link the robotic mower and docking 
station again – ensure that the robotic 
mower is in correct alignment to the 
docking station (Ö 11.16)
– Re-route the perimeter wire – ensure 
correct routing in the area of the 
docking station (Ö 9.10)
Check for correct connection of the 
perimeter wire ends in the docking 
station (Ö 9.11)
Fault:
The robotic mower has crossed the 
perimeter wire
Possible cause:
– Perimeter wire incorrectly routed, 
clearances are not correct
– Slope inclination of mowing area too 
steep
– Interference affecting the robotic mower
Remedy:
– Check the routing of the perimeter wire 
(Ö 11.14); check the clearances with 
the iMow Ruler (Ö 12.5)
– Check the routing of the perimeter wire; 
block off areas with excessively steep 
slope inclinations (Ö 11.14)
– Contact your STIHL specialist dealer 
(#)