05-06-2010, 01:30 AM
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This from a site might help you:
"Make sure to clean the impeller regularly, also clean the area the impeller “nests” (impeller well) to prevent debris from stopping the impeller. If the impeller stops, check for carbon caught in this area and make sure impeller itself is not broken. The design of HOB (power Filters) tends to allow carbon, or other grit such as rock, gravel, even particles of volcanic rock or other media to get caught in the impeller well between the impeller magnet and well wall. A “buzzing” noise is a tell tale sign of this problem. All filter media, cartridges, carbon, volcanic rock, etc should always be rinsed to prevent this. Removal of this debris, is generally quite simple, often a back flush with water while turning the filter upside down will clear out the problem debris; if not removal of the motor unit with the impeller and physically removing the impeller and cleaning out the debris will remedy the problem (please note, the Penguin motor is built in, so you have to remove the impeller from the top to service this filter).
The impeller should be to turn 359 degrees before locking, if the impeller spins freely or not at all, it is broken.
Clean filter intakes with a foxtail brush to prevent build up that will slow the filter (a sponge pre-filter helps prevent this).
For bio wheels, make sure the Teflon ends on the bio wheel axle are clean and have no build ups of calcium, you can replace these with Teflon tape in a pinch. Also make sure the bio wheel assembly is not to tight, simply remove the bio wheel and gently stretch the assembly apart so the wheel can spin more freely."