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22 Troubleshooting Guide
The obstacle is not firmly 
attached to the ground – e.g. 
fallen fruit or tennis ball.
► Start all mowing operations at the docking station in 
suitable mowing areas, @ 15.6.
Driving tracks at edge of mowing 
area.
Too frequent edge mowing. ► Switch off edge mowing or reduce it to once per 
week, @ 15.3.
Starting points in use. ► Start all mowing operations at the docking station in 
suitable mowing areas, @ 15.6.
Battery is charged very frequently 
towards the end of its service life.
► Have the battery replaced by an authorized STIHL 
iMow servicing dealer.
Offset drive home (passage) not 
switched on.
► Switch on offset drive home, @ 15.2.
Unmowed grass at edge of 
mowing area.
Edge mowing switched off. ► Mow the edge once or twice per week, @ 15.3
Perimeter wire routed 
inaccurately.
► Check the routing of the perimeter wire, @ 10.7.
► Check the clearances with the iMow Ruler, @ 11.3.
Grass is out of reach of mowing 
blade.
► Cut the unmowed areas regularly using a suitable 
grass trimmer.
No wire signal Docking station switched off – the 
LED is off.
► Switch on the docking station, @ 12.
Docking station not connected to 
electrical socket – the LED is off.
► Check power supply to the docking station, @ 10.3.
Perimeter wire not connected to 
the docking station – red LED 
flashes.
► Connect the perimeter wire to the docking station, 
@ 10.5.
Break in perimeter wire – red LED 
flashes.
► Search for wire break (@ 22.3), then repair 
perimeter wire using wire connectors, @ 11.14.
Robotic mower and docking 
station are not linked.
► Link robotic mower and docking station, @ 10.6.
Electronics error. ► Contact an authorized STIHL iMow servicing dealer.
Installed perimeter wire too short 
– red LED flashes rapidly at 
intervals, @ 12.1.
► Install the STIHL Small Area Module AKM 100 
(special accessory).
► Contact an authorized STIHL iMow servicing dealer.
The robotic mower is not 
receiving any GPS signal.
The connection to the satellites is 
being established.
No further action required. It can take a few minutes 
for the connection to be established.
3 or fewer satellites within range. No further action required. It can take a few minutes 
for the connection to be established.
Always activate the disabling device before carrying out any inspection, cleaning or maintenance.
Condition Possible Cause Remedy