That is not something you would ever have a need to use. It reverses the polarity of the cell. The unit will normally reverse polarity automatically every several hours to reduce scale buildup. A technician would use that function, along with a multimeter, to verify that the reverse polarity circuit was working.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!