I'm experiencing the exact same issue and came across this thread.
- Rainbird system, 6 zones
- installed Gen2 few months back and has been working flawlessly
- Wifi signal is decent and app says it's connected
Got a notification last week that it ran but looked dry. Ran a manual this morning, says it's running but isn't.
Checked wires and took volt reading. Zone 1 and looked normal.
Zone 1 .66 volts. Zones that shouldn't be activated .01/.02. Wiring was good.
I don't have a water pump, just a backflow valve in the basement, which hasn't been touched. Water to the system is on/open.
The valves in the ground are old, but have been working fine for 10 years. Not sure how to turn one zone on manually from valve head. Doesn't appear to be screw or twist.
Any other thoughts?