What to do if my AL-KO Robolinho 4000 displays 'CN119: R-Bumper deflected CN120: L-Bumper deflected'?
- LLuke JohnsonSep 5, 2025
If your AL-KO Lawn Mower displays 'CN119: R-Bumper deflected CN120: L-Bumper deflected', it indicates that the automatic lawnmower has encountered an obstacle and cannot move clear for safety reasons, for example, collisions close to the base station. Remove the obstacle and acknowledge the fault message.