Went out to check the pool this morning and I notice that the red ligth was flashing on my autopilot. It was giving me a check flow/clean cell warning, so I took it a part the strainer was clean and the cell looks good. After putting it back together it now is giving a purifier off/check flow warning. Its showing 0 voltage, so what do I need to do. Do you think the cell is shoot. Its a sc60 cell thats 4yrs old. Up until this point I havn't had many problems with this system.