Spoke w/Pentair and they report that the reason I'm seeing the "off" light is due to the fact that I'm watching it right after the pumps turn on and theres a setting to not turn on IC for 5 minutes after pumps have been turned on. Been monitoring and haven't seen "off" light on during normal operation.
I do have one more thing to throw out there and I'd like some opinions. Depending on the test method and based on how much salt I added I think my salt level is between 2850 and 3100. I've used two digital testers, a strip and pool store and this is the range I'm in. The IC40 reports anywhere from 3650-3950 depending on the day. Manual suggests 3600. Manual also states the IC reading could be off +/-400-500 (can't remember exactly).
Should I toss another bag of salt in? Also, I'm losing about 1 FC per day in this hot Vegas sun, so it's producing, just not as much as it should be based on prior three seasons.
Thanks!