Roger,
Setting up the Night Mode function is very simple. In order to do so, wait until the time of night you'd like them to go into Night Mode. Then, press and hold the Mode and Set buttons simultaneously on the Master. At this time, the controller will blink a red, white and blue pattern. Press and hold Mode and Set simultaneously again until the pump breathes white. At this point, your pumps are set in Night Mode and will enter this mode at the same time daily unless power is disrupted from the controller.