Tech Bulletin - iRobot Roomba Customer Support Booklet

Roomba Customer Support Booklet
Tech Support Bulletin 2.0
Released 10-08-2002
THE PROBLEM
A limited number of units were assembled using acetal drive wheel pulleys. When
operated in environments that may cause the wheels to stall (i.e. deep carpet,
rooms with furniture that Roomba could become wedged under, etc), it is possible
that the pulley could thermally deform or that the drive belt could break. In these
circumstances, mobility will be impaired, and Roomba may appear to rotate in
circles around the damaged wheel.
We have solved this problem on all units manufactured after 090602 by replacing
the acetal pulley with one made of brass, which does not deform and creates a
more effective interface with the belt.
DIAGNOSIS
There are two possible failure modes.
1. The pulley thermally deforms: the wheel module will be very difficult to spin
by hand, or may even be impossible to rotate.
2. The drive belt breaks: the wheel module will offer very little resistance when
spun by hand, and may even rotate freely.
Either of these symptoms will appear EVERY time Roomba is turned on and
started.
Confirmation may be obtained by asking the customer to rotate the drive wheels by
hand. The wheel should offer some resistance as the drivetrain spins (this is
normal).
THE SOLUTION
Return to store for exchange
DATE CODE AFFECTED
083002 - 090602
SEVERITY
Limited number of units affected
Can't find the answer to your support question? Call Roomba Customer Support at 1-877-855-8593 or email us at
roomba-support@irobot.com
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