This morning I noticed that my Aqua Pod was flashing “check system” at the top. I watched the main screen as it went through its normal routine, but it never tells me what the problem is. I just cleaned my filters and salt cell last week and reset the timer, so it shouldn’t be that. Salt level is 3000, so I know it isn’t low salt. When I go outside to the actual Pro Logic box, the check system light is off. Only the Aqua Pod is flashing “check system”. How do I figure out what the problem is?