So I have the Pentair with 4 relays in it. The third relay goes to the LV transformer for the lights. In the junction box all the lights are tied together.(pool and spa). I want the spa light to be seperate. The 4th relay is not being used. So I have Filter Pump, Cleaner (AUX1), Air Blower (AUX2), and Pool lights (AUX3). Will this unit recognize the fourth unused relay as AUX4? I broke out the spa light and ran it to the 4th relay and back to the LV transformer. It does not seem to recognize the AUX 4 which has the 4th relay plugged into aux 4 on the board. If it does not, will it work with something like Solar that I could use to energize the 4th relay with??? I could plug the 4th relay into the Solar on the board if that will work.....I would just have to know that it will say solar and not SPA LIGHT. Has anyone tried this before????