During the rainy season I would turn off the sprinklers and only turn them on when you go for a few days with no rain.
My rain sensor turns the system back on too soon - a few hours - after a rain so it does not do any good to use it.
For the first few years of a new lawn you need to water deep so the roots go down into the soil. After a few years you can cut back on the water.
Go on line and look up your instruction manual.
How many zones, how long do you have then set to run, how many days, how much water do you use?
Also turn your system on and check each head to see that they are working correctly. I have to fix one about once a year or a little more offen.
The run time for a zone depends on the type of sprinkler head you have. If they are new you probably need 90 minutes on a new lawn. What you are trying to do is to put down about an inch or inch and 1/2 of water slowly. Not sure about the inches, seems high as I write this so maybe some one else can comment. You can put out some cans to catch the water and measure how much water you are using. I think the Central Florida University is a good site to check on landscaping and I think they have free help.
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