User's Manual
Robomower RL500/RL550/RL800/RL850 
Safety Features 
1.  Child Guard / Safety Guard 
This menu option offers a safety feature to help prevent children or others not familiar with the 
safe operation of the mower to operate it freely. 
2.  Lift Sensor 
There is a sensor located on the front caster wheel of the mower.  In the event the front of the 
mower  is  raised  approximately  1-inch  from  its  resting  position  on  the  ground  during  blade 
operation, the blades will stop rotating immediately (< 1 second). 
3.  Sensor Equipped Bumpers 
The  front  and  rear  bumpers  are  equipped  with  contacts  that  will  activate  when  the  mower 
strikes  a  solid,  fixed  object  when  that  object  is  at  least  6-inches  in  vertical  height  from  the 
supporting surface of the mower.  When the bumper sensor is activated, the mower will stop 
movement in that direction and reverse itself away  from the  obstacle.  In manual blade 
operation, bumper activation will stop the rotation of the blades immediately (<1 second). 
4.  Emergency Stop Switch 
Located on the top outer surface of the manual controller, red in color.  Pressing this button at 
any  time  during  operation  will  stop all  mower  movement  and  stop the rotation of the blades 
immediately (<1 second). 
5.  Automatic Mode Recognition 
The  Robomower  is  designed  so  that  it  cannot  be  operated  in  the  manual  mode  while  the 
Manual  Controller  is  in  its’  pocket  and  it  cannot  operate  in  the  automatic  mode  while  the 
Manual Controller is removed. 
6.  Two-Step Operator Presence Control 
While  in  manual  mode,  it  requires  two  independent  finger  actions  in  order  to  engage  the 
mower  blades.  Once engaged, the mower blade button must remain depressed to continue 
blade operation. Once released, the two-step engagement process must be repeated. 
7.  Electronically Controlled Charging System 
The  Robomower  is  equipped  with  an  on-board  charge  control  system.    This  allows  you  to 
keep  the charger connected at all times, even after the battery is fully charged.  The control 
system will prevent an overcharge to the battery and keep it fully charged and maintained for 
the next use. 
8.  Sealed Power Pack 
The power pack that operates the Robomower is completely sealed and will not leak any type 
of fluids, regardless of position.  In addition, the power pack contains a one-time-use fuse in 
the event of a short-circuit or power malfunction. 
SAFETY 
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