My Liberty 600 isn't reaching the steps
Make sure the robot isn't set on Floor Only mode. On Regular, Ultra-Clean, and the 1-week Eco Mode settings, the robot will ascend steps and sun ledges.
We recommend setting the robot to Regular or Ultra-Cleaning mode. The robot will reach the steps during the 2/3-hour cleaning cycle. The robot uses its jet spray from the bottom to push debris off the steps, and then it cleans any debris that lands on the floor.
For best results with sun-ledge cleaning, the robot needs a water depth of 14". The feature may work differently on 12"-14" deep sun ledges.
It is crucial for the robot to scan the pool and map out the location of the stairs or sun ledge during the first few cycles.