Thanks for looking into this. FYI I have seen it happen on zone 1 in the past…but any way…Zone 1 is a Hunter PVG101 with three pop up rotors. The Master Valve is tied to my PSR to energize the well pump. I do not have a pressure tank. Are you guys looking for load or resistance on the Zone 8 terminal during operation? That could be an issue as this is not connected to a valve. It only turns the pump on for when I have the hose bib open. Still trying to figure out if the anomaly you are alerting on is from the Master Valve or the zone terminals. Induction voltage from the PSR or no load on Zone 8?
RACHIO>Master Valve Wire>PSR>220Volt RELAY>WELL PUMP>Hose BIB(normally closed)>Manifold
RACHIO>Zone 1 Wire>PVG>3 Rotor Heads
RACHIO>Zone 2-7 NOT PROGRAMMED or wired
RACHIO>Zone 8 Used When Hose Bib is open (nothing connected to zone 8 terminals) I run zone 8 to force the PSR on only.