CYA doesn't consume chlorine, but it does slow down it doing it's breakdown--a 2-edged sword.

There's NOTHING wrong with running higher CYA if you use the correct Free Chlorine level. It's just fine and won't consume more chlorine once you reach the ideal level. You just need a FAS-DPD test kit for FC--Ben's kit has it and there are some others out there, too.