Intellichlor by Pentair Cell Light not on and other issues

[TAS17]

I have a pentair easytouch sysytem IntelliChlor - the cell light is not on (the cell was cleaned).... the salt reading is 2200, but the chlorine level when I test it is high and my ph is high.. I put ph down in the pool, but it has not changed levels.... I keep getting DE in the pool from the returns... any suggestions, advice???? Thanks alot.....

[Pool Clown]

If your percentage is set to anything but 100, your cell light is going to be off according to the percentage. If it is set for 60% the cell light will be off for 40% of it's run time.

[polyvue]

I put ph down in the pool, but it has not changed levels....
I was wondering which product (dry acid - sodium bisulfate? muriatic acid?), how much is being added and what test you're using to determine this? Dry acid is usually contraindicated for pools chlorinated with a SWG; muriatic acid won't increase sulfates. What test kit/meter/strip is being employed to measure pH? In my pool, there is a rather constant acid demand -- not atypical for SWG pools -- however, a cup or two of 31.45% muriatic acid a week (for my 14K gallon pool) keeps the pH below 8.0. Recommend posting Total Alkalinity (TA) and pH numbers for more feedback.