I have the IntelliChlor IC40 on a 20,000gal gunite pool. Lately the "add salt" has been staying on. Per the manual, the add salt light comes on when the salt level is between 2500 and 2900ppm. When the add salt light is on the chlorine outoput is reduced.

I had the salt level checked and it is at 3300ppm.

I checked the unit for scaling. Its clean. Its only been in service for 2 months but I bought it about 6 months ago when the pool dig began. I used the pass-through cell during the pool startup.

A couple of days ago I noticed the "green salt" light was on. I thought the problem cleared by itself. I went inside and checked the equipment readout through the IntelliTouch controller. It said I had 3400ppm salt. Now a day or so later, the "add salt light is back on.

I'm still waiting for Pentair to return my call and/or e-mail.

Question: Is there any type of calibration that can be done? Perhaps through a hidden service menu.

Thanks