Chances are your professional contractor programmed the controller when they were finished installing the system. They probably also gave you a schedule (or schedules) you could enter into the controller during different seasons of the year. If not, you should contact an irrigation professional in your area who can give you guidance as to the number of minutes each zone should water, and on how many days of the week.
Each climate has different requirements; each plant material will have varying needs, as well. In addition, be sure to account for the fact that different types of sprinklers apply water at varying rates. Please click on the link for more information on how to determine correct watering times: www.wateright.org