Corey, thats the driver alarm going off. Unplug the pump, and check to see if there is a snail stuck in there, or some other obstruction. If it looks clear, give it a good bath in 50/50 vinegar and water. Let it set in there for a good 3 or 4 hours, and hit it with an old soft toothbrush. Clean it up really good. Then see if this fixes your problem. If it doesnt, its likely the driver box, or transformer.
I just recently had a 6000 do the same thing, and it ended up being a bad coil in the motor drive unit. (the actual power head itself)