Hey Steve, I tried my dealer first and he was getting different answers from the help line so I thought I would go to the answer man.. Problem is, whenever I kill the power for a water change or have a power failure, the hush pump will not run. The cure is to go into the box and pull one of the jumpers and pop it back on a different spot, wait 15 seconds and put it back to the original spot. I think it is j-9.. I have a 730 with hush and no ozone.. Thanks again Steve, Ron