Kit,
This is a known issue.. As long as the salt light on the cell is green, then the cell knows what the salt level is, it is just not being read by the EasyTouch..
If the cell is under warranty, call your pool builder, or Pentair, and have it fixed.. If not under warranty, there is no need to fix it at all, unless you just want to.. The problem has been "fixed" by replacing the Flow Switch, the cell itself, the cell's power supply card (surge card) inside the EasyTouch and also the main EasyTouch board.. Obviously the cheapest thing to try is the flow switch..
I suspect it is a timing issue.. I have ScreenLogic and when I bring up the Chlorinator page, the initial reading is zero. About 1/2 a second later it will change to my salt level.. Every once in a while, it will stay at zero.. When it does, the EasyTouch panel itself will also be zero.. Most of the time just reloading the page, will make it work.. If that fails, rebooting the system makes it work for me.. For a lot of others, parts have to be replaced before it starts working again.
Thanks,
Jim R.