0478-131-3050-A
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English 
5 IMPORTANT SAFETY INSTRUCTIONS
5.1 Intended Use
WARNING
■ This robotic mower is intended for autonomous, 
programmable lawn care. Use for other purposes may 
increase the risk of personal injury and property damage.
■ The robotic mower is intended for cutting grass in yards up 
to approximately a quarter of an acre (1000 m²).
■ The ADO 401 docking station and the OWA-60U-27VUSM 
power supply are designed for charging the lithium ion 
battery integrated into the robotic mower and supplying 
low voltage electrical current to the perimeter wire. Use of 
the docking station or power supply for any purpose not 
authorized or intended may result in serious injury or 
death.
■ Improper or unauthorized use of the robotic mower, its 
integrated battery or the docking station and power supply 
could result in personal injury or property damage. Use 
the ADO 401 docking station, the STIHL RMI 422 PC-L 
robotic mower and its integrated battery only as described 
in this manual.
5.2 Operator
WARNING
■ According to STIHL's current information, the electric 
motor of this robotic mower should not interfere with a 
pacemaker.
– However, persons with a pacemaker or other 
implanted medical device should consult their 
physician and device manufacturer  before operating 
this robotic mower.
5.3 Personal Protective Equipment
WARNING
■ To reduce the risk of personal injury, always wear proper 
clothing and protective apparel when:
– installing the docking station and setting up the robotic 
mower for operation;
– installing or repairing the perimeter wire;
– entering the mowing area or approaching the mower 
while in operation;
– replacing the mowing blade;
– inspecting or cleaning the robotic mower;
■ To reduce the risk of eye injury:
Never stand on, sit on or attempt to ride the 
robotic mower or allow others to do so. Serious 
personal injury and damage to the robotic 
mower could result, @ 5.6.3.
Never immerse the robotic mower in water or 
other liquids, @ 5.6.3.
Always disable the robotic mower by pressing 
and holding the STOP button for 5 seconds 
before lifting, transporting, inspecting, cleaning 
or servicing, @ 5.6.3.
5 IMPORTANT SAFETY 
INSTRUCTIONS
Wear goggles or close-fitting protective 
glasses with adequate side protection that 
are impact-rated and marked as complying 
with ANSI Z87 "+"  when setting up the 
docking station and robotic mower, 
installing or repairing the perimeter wire, 
inspecting or cleaning the mower, 
replacing the mowing blade and any time 
you are in the mowing area during 
operation.