Had new Hayward AQR15 system installed in 9/2015. Cell has been maintained according to directions & a test 2 weeks ago at a Hayward dealer indicates it is working as it should. For the past several months, weekly testing reveals that no matter where I set the Desired Output (%age of cell time on), the result is an FC reading of above 8 when tested using TFTestkit. I've lowered the %age in intervals of 10 from 70% to 20% during the past 6 weeks, but the FC readings remains at 8 or above. Only when I turn the unit off, does the FC figure drop. Testing last week was: FC at 8+; pH at 7.7; TA at 120; CH at 450; CYA at 45. Salt is holding steady at 3100. I've also noticed lately that when I adjust the Desired Output, the figure on the screen seems to drift up or down before settling, and then settles at about 15% higher than where I actually set the Desired Output knob. Would this indicate there might be a malfunction in the power board (or whatever it's called)? I know I need to make adjustments for CYA & TA. Would doing so affect the FC reading? Pump/filter runs 16 hours a day; 4 hours at 1350 rpm; 6 hours at 1100 rpm; and 6 hours at 2350 rpm. Many, many thanks.