Whenever the pool shuts off and then turns on the power pack resets the chlorination to 100% from whatever it was set to before. I changed the battery in the unit and it didn't change anything. The firmware version is C1. One thing I noticed is if I changed the chlorination % and the turned off the power pack by holding the power button down and then turning it back on it would stay at what i changed it to, but as soon as the pump turned off it would reset back to 100%. Any idea what could be causing this problem?