I have a Hayward Swim Pure Plus SWG that came with the house I just bought. The salt cell needed replacing. I replaced the salt cell and added the appropriate amount of salt. When switching the SWG from the OFF position to Auto, the SWG seems to be working correctly. I get Cell Voltage readings of 24.6 and Cell Current readings of 4.8 which according to the manual is within the proper values when generating chlorine. However after about 30 minutes the SWG change to Cell Voltage of 32.2 and Cell Current of 0.00, which according to the manual is consistent with readings you would get when NO chlorine is being generated. Since I've never seen this or any SWG generator working before I'm not sure if this is the typical operation of the unit. Also when the latter voltage of 32.2 and current of 0.00 occur, the SWG panel still has the green "generating" light on. Can anyone tell me if this is normal operation or time to replace?