I have a pair of 6212 waveboxes. One has stopped working. It is a 6261 pump with a 6091 controller and a 9935 power supply with 24v jumper. The pump will run only if disconnected from the controller. I do run it with the potentiometer on high. When disconnected from the controller it works well, will run low or high power indefinitely. As soon as plugged to the controller it stops. I have to unplug the controller then unplug and replug the power to restart the pump. Any ideas or should i just send it in?