The no flow light blinks for about 30 seconds when it detects flow and then it should be good.All I could ever accomplish was to get the no flow light to blink. So, I'm not sure what that means.
You might be able to use the current board with it set to AL-1 if you add a flow switch, but the timer would not work.
You could just put the pump and SWG on an external timer and power both at the same time with the timer.
Based on the serial number, you have a 1 year warranty and it was made on the 80th day of 2020.
If it was installed less than 1 year ago, file a warranty claim.