I have 3 zones. We have had system running for several weeks early in the morning. Yesterday I checked history & found all 3 zones had instead of a green checkmark icon, an orange wifi with red x icon (see photo below). I was able to try "run now", and only zone 1 worked. 

I ended up deleting ALL schedules & did a one time water on zones 2 & 3 & they worked. I made a new schedule for all 3 zones, and this morning i got the orange wifi icon on zone 1, & zones 2 & 3 ran just fine. 

Any ideas?   TIA!