I was hoping V3 would have had open circuit detection. I think it is crucial. My customer on Monday had two zones that didn’t work. He thought everything was fine. It turns out the bug spraying company installed one of those termite bait spikes through the common wire. It happened months ago. An open circuit test would have known that. Seems a no brainer to me for a smart controller.
It does have fault detection, although it doesn’t seem very accurate yet.