TweetyBird

I am new around these parts. We just had a 15X30 pool installed last week with the Goldline AQ-TROL-HP chloring generator. We have the salt levels right. I have been running the pump 24 hours a day. I went to use the timer on the Goldline AQ-TROL-HP today, and set it to run 5 hours. It cut off after 20 minutes or so. The question is, the timr has all the little switches. Do you need to pullall of them out for the run time, or just one? Confused. THX