I am new to pools, mine was completed a couple a weeks ago. I have a Legend II cleaner, I have a VS-3050 pump, I turned the pump on full 3450 rpm with the return value turned on only about 1/5 and the Legend II will not move. I turned the return value off and I can turn the pump down to 2800 rpm and have the Legend II move and the minimum speed. Is this normal? I can never get a straight answer from my PB.