I have a newly installed AquaPure AP 1400 but it isn’t generating chlorine as it keeps reading “no flow”. I have gone through the trouble-shooting options in the manual and none of those steps resolve my issue. When I unplug the interface from the board and plug it back in, it displays a few minutes of WAIT and then FLOW and CELL ON light come on. This lasts about a minute and then goes back to NO FLOW. Any ideas?