AquaRite Chlorine Generator keeps telling me to check salt. It reads 2500 but my test strips and the local pool supply company checks my water at 3100  I have recalibrated the defaut screen, checked power supplies and followed the AquaRite diagnostic manual to check voltages and Ohms.  I have had the T cell checked twice and have not found any issues. I actually chaged the PCB and have the same problem.  I am at a loss as to what the next step should be... Any suggestions?