iRobot 300 - Manual (Page 17)

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Maintenance and Adjustment
(cont...)
Cleaning the Impeller
1
Unplug the Power Supply. (Please keep the plug away from contact
with water.) Unplug the floating power cord from the Power Supply.

Remove the screws that attach the jet valve ports. (See Jet Valve
Housing Assembly illustration on page 7.)
Verro uses an impeller to pump water up through the vacuum intakes at the
bottom of the robot and out the jet valve housing at the top. If this impeller
becomes fouled by hair, string, etc. it will reduce the amount of water Verro
can pump and may reduce the life of the motor.
If you notice that Verro is not cleaning well or that it is having difficulty mov-
ing around the pool, and other measures (cleaning the filter bag, checking the
vacuum intakes, etc.) have not corrected the problem, check the impeller.

Remove the jet valve port.

Inspect the impeller, especially at the bottom, for hair, string, etc.

If the impeller is fouled, bend a large paper clip as shown.