Problem: Machine moves few steps and then stops, considering there is an edge.

Reason: While moving machine manual through hand from 1 location to other location, the underneath sensors get hand print or dirt. Robotic Cleaner, take that as dark area and move back.

Solution:- Please follow the below steps:

1.  Please Turn off the Machine and put it upside down
2.  Take a dry cloth and clean all sensors, as shown below in video.
3.  Turn back the machine and start. It will work.
4.  Start the machine and it will work.