I recently upgraded to an Apex system. I have the WAV starter kit hooked up. One of the WAV pumps is working fine based on the schedule set. I have the 2nd WAV pump set up to the same schedule but the pump only turns on every 7-10 seconds and the propeller turns once and then turns off... then repeat. (In AUTO mode). When I turn the pump to ON it turns on full blast. Any ideas why/how this pump is not responding to the schedule?