You seem to know a lot about SWCs and we're new at this pool stuff and are having some trouble. We noticed some white flakes coming from the inflow when the filter cycle first starts, and that got us looking at the salt generator. Here's what I can tell you about our situation:
The salt test kit strips gives us one reading (a too high reading of 4000 PPM) and the SWC gives a different reading (a a still high range reading of 3600 PPM), and the owner's manual says it should be 3250 for our size pool. We get a trouble shooting code on the SWC that indicates there is a salt level problem.
When the pool kicks on for filtering, we've had recurring spurts of white flakes, which, just this morning, we've discovered build up of same on the salt cell, and cleaned it off using a water hose with a power nozzle.
The water temp was less than 55 F for a little while recently (over the past couple months) and we turned the SWC off for a period of time, then chlorine got a little low and the air temp bumps up to the 70s during the day, so with the solar, we can keep the pool temp above 55 and have been running the SWC regularly with an average pool temp of 60 F.
Aside from a few occasional spa sessions using the gas heater, there's been little pool activity since the beginning of November.
Our other test kit shows chlorine, free chlorine, PH, etc., to be fine.
We live in an area of southern California where the water is quite hard.
Bottom line, we're trying to determine what the PPM should be and how to minimize this buildup on our cell. Our pool is basically rectangular with a some 45 degree corners and a spa that juts into it and takes up some of the rectangle. Overall the pool part measures 30X14, with a depth of 5ft in the center, 3.5 feet on the shallowest end and 4.5 ft at the other end. The spa is 7 x 6.
Colette & Tom in Santee, CA