Husqvarna Automower 305 Technical Manual page 80

The robotic
lawnmower travels in
a small circle or one
wheel locks up when
turning instead of
rotating backwards.
The robotic
lawnmower does not
react when pressing
the STOP button
The robotic
lawnmower does not
react when the cover
is closed.
6.2.2 Symptoms during searching
Table 9: Symptoms during searching
Symptom
The robotic
lawnmower runs, but
the blade disc does
not rotate.
The robotic
lawnmower does
not run along the
guide wire when it
is searching for the
charging station.
English - 78
6. TROUBLESHOOTING
The wheel motor's gearbox is
slipping.
Defective microswitch.
Faulty microswitch
Cause
The robotic lawnmower
searches for the charging
station. The blade disc does
not rotate when the mower
is searching for the charging
station.
The guide wire is broken.
The robotic lawnmower cannot
travel the distance from the
guide wire as the set guide
width defines.
Check the wheel motors' function
when idling via the Tools menu or use
Autocheck EXP. The battery voltage
should be more than 18 V in this test.
Check that both the wheel motors start
with 50% power. Then increase the power
to 100%. At 100% the speed of each
wheel should be at least 35 cm/second.
Check that the motors' gearboxes are not
slipping by blocking the respective wheel.
In connection with blocking the speed
should be 0 cm/second. Replace the
wheel motor if there is a fault.
Check and replace the STOP button's
microswitch if necessary.
Check and replace if necessary the STOP
button's microswitch.
Action
This behaviour is normal; no action
required.
Check LED signals on the charging
station. "6.4 Troubleshooting loop signal"
on page 83.
Reduce the guide width until the robotic
lawnmower is able to follow the guide
wire. Check using the Test out function.
Increase the distance between the
boundary wire and the guide wire. The
distance between the boundary wire and
the guide wire should be at least 30 cm.