Hi Guys and Gals,
I think I know the answer to my questions, but thought I would post here as a last resort.
Some background first, I have a 14 kgal inground plaster salt water pool. I had a Zodiac LM2 SWCG that finally gave up after 6 years. My salt levels were very high, close to 5000 ppm, mostly due to my inexperience when I took over the pool 6 years ago (I added salt when the low salt light was on, but it was really just a bad cell). The Zodiac actually was able to operate fairly well at that high salt level. Before replacing my SWCG, I had RO service done to my pool to both bring down my salt level as well as reduce my calcium which was approaching 700 ppm.
Since I already had a Pentair Intelliflo pump, I decided to go with a Easy Touch + IC40 system. I purchased the system on Amazon in the end of July and then installed it myself in August after the RO service was completed in early August. I added salt until the system was happy with the salt level. It was slightly over the recommended 3400 ppm, but only by a couple of hundred ppm. I am using the Taylor drop-based test to measure salt content. I added the salt in stages and the measured increase in salt concentration jived with what was expected based on the kg of salt and the pool volume.
Once I got the salt concentration correct, everything was working well for 2-3 months, but then noticed my chlorine start to drop and the IC40 was reporting low salt and as a result was not generating chlorine. Test of the salt level with the same Taylor kit showed a salt level of 3800 ppm while the Easy Touch reported very low salt at 2300 ppm. The water temperature is cool, but not cold at 63F.
I checked the cell, it looked fine, but acid cleaned it nonetheless. I contacted Pentair, but apparently self installed units have only a 60 day (I bought in July and now its December) warranty which is completely ridiculous in my opinion, but that is probably a complaint for another thread. I really am just shaking my head at the 60 day "warranty."
Any suggestions on other things to troubleshoot? My TA is 100-120 (a little high for SWCG but I expect to come down as I maintain my pH), my calcium is ~350, and my pH is 7.4, but I don't think these levels are relevant to my issue at this point. I guess I am just a little p***d that Pentair says that I am SOL at this point.