I have a very simple lap pool in CA desert with solar, which had ancient Jandy 1.5 hp which worked fine for solar btw. Had new filter put in, pool is 8,000 vol. Solar trek recommended keeping it set at highest, but I believe 3 will do the job for solar and turnover for 8 hours. Speeds 5-8 were supposed to be disabled, but were working nonetheless, and I programmed the schedule to 4 speed. I cannot now change the speed/schedule, no how, no way no wahhh. I have pool service who installed this, but it's looking like this relationship has a short horizon. Anyone else had issues with reprogramming? (And yes, this has the RPM selection as well to make me more confused.) Any information you have would be much appreciated.