I have 2 systems with both using the Hunter Icc controllers. 1 has been controlling a pump in the pond using the Hunter pump start relay. The pump start relay is wired to the common terminal and the pmv terminal as in the hunter instructions. This all works great. The 2nd system has been on city water. I disconnected the city water supply and connected the pond supply to it. Water flow is great. I need to tie the 2 controllers to the pump start relay using 2 isolators. Hunter instructions show nothing but a pump start relay or a master valve to be wired to the common and pmv terminals. The first system had nothing on the terminals and was simple to wire in the pump start relay. The second system has 3 wires on the common terminal and 1 wire on the pmv terminal. When I pull these wires the controller displays P ERR. Sorry for the long post. My question is...how can I disable this without the controller shutting down. Thanks for any help.