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Trouble Number 04: Edge Sensors
Trouble number 04 means Bob’s edge sensors are blocked or dirty. Bob’s four, oval-
shaped edge sensors are located on his bottom, near his bumper.
What to do:
Wipe the sensors using a clean, dry cloth or dust them using compressed air.
If Bob displays this trouble number while working on dark-colored carpet or
patterned flooring, you may need to deactivate his edge sensors. See page 69
for instructions
Trouble Number 05: Wall Sensors
Trouble number 05 means Bob’s wall sensors are blocked or dirty.
What to do:
Do a visual check on the transparent stripe on Bob’s bumper. If it is too dirty
for you to see what is behind it, wipe it with a clean, damp cloth. To ensure
nothing is jammed under the bumper, gently tap it and use compressed air to
clear it of debris. If the issue persists, try running a checkup test on Bob.
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