iRobot 4110 - Manual (Page 7)

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Roomba Accessories
Virtual Walls create a keyhole shaped area that Roomba will not
enter. Virtual Walls are great for keeping Roomba in or out of
rooms, or away from cords and other spots you don't want
Roomba to clean.
Virtual Walls will automatically shut off after approximately
130 minutes.
You can set Virtual Walls to block areas up to 13 feet wide.
Remember, at 13 feet, the far end of the beam will be very
wide.
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Virtual Wall
Frequently Asked Questions
What can I do if Roomba's battery does not seem to be charging?
If Roomba's battery is not charging, you should first make sure it is properly seated in Roomba.
When you insert the battery, you should hear two clicks. Then confirm that the green light on the
charging “brick” is a solid green and that the power indicator light is pulsing. If this does not work,
call customer service at 877-855-8593.
What should I do if Roomba repeatedly starts and stops, or just spins in place?
If Roomba is repeatedly starting and stopping, or just spinning in place, you may have a blocked cliff
sensor.Try cleaning the cliff sensors, located under the bumper, with a Q-tip or compressed air.You
also should remove and clean Roomba's brushes and brush bearings.
What can I do if Roomba is cleaning longer than I'd like in a particular room?
Roomba automatically calculates room size and run time based on a number of factors. Roomba
will clean for longer in rooms with more debris and furniture. Roomba also spends a little bit
longer cleaning rugs than hard floors. In an empty 8x10 room with hard floors, Roomba will clean
for approximately 20 minutes. Removing obstacles from a room will decrease the amount of time
Roomba needs to spend in a room.