Hello, I am new to this site as a registered participant but have been lurking for a long time! I recently installed the new iaqualink IQ 900 (new main pcb) on my Jandy system. I was using the old PDA system until it quit communicating with my board so I figure it would be a good time to upgrade. My system was installed in 2006. I have the big beige main box which is the RS 8 I believe. I am having trouble reading the aquapure on the iPad it's telling me that it's not powered up. I can adjust the levels manually though. I was wondering first if anyone can tell me how to hook the aquapure 1400 board (Old one with the incorporated LCD screen) to the iaqualink board. Is it as simple as hooking the 485 from one to the other? I have done that and it basically turns off the aquapure board, all lights go out. Are the two boards incompatible because of the age? Everything else seems to work great! Jandy refuses to help because I'm a homeowner...Thanks for any help in advance.