I own a hot tub repair company. Pretty familiar with electronics and plumbing. A client of mine has a Sundance hot tub that I found to have a bad relay on the board, low speed on pump #1 will not work, FLO error. I have verified that the pump works on both speeds by switching the red and black wires. The model has 2 pumps but no circ pump. I had a spare control pack that I used to replace the defective one, but it is for a Sundance tub WITH a circ pump. How can I wire the circ pump output on the board to run the low speed of pump #1? When pump #1 is running on low the FLO message goes away.