Inkbird iic-600

Questions & Answers
1

I’m using an Inkbird IIC-600 irrigation controller and I’m having trouble getting the valves to open electrically.

The controller powers on normally and I hear a click coming from the valve itself (not from the controller) when I manually turn on a zone. So the solenoid is getting some power. However, the valves do not open electrically.

If I open them manually (using the small bleed screw/knob), water flows fine — so pressure and plumbing are OK.

The solenoids are labeled 24V AC, so they should be compatible with the IIC-600.

Wiring setup

  • I do not have a master valve or pump output.

  • I have two irrigation zones.

  • Each zone has its own pair of wires.

  • Both zones share a single common wire, which is connected to the COM terminal on the IIC-600.

  • The individual zone wires are connected to Zone 1 and Zone 2 outputs on the controller.

So the wiring is:
Zone 1 → S1, Zone 2 → S2, and both commons → COM.

Symptoms

  • When I activate Zone 1 or Zone 2, I hear a click in the valve.

  • But the valve does not open electrically.

  • Both valves do open manually.

  • So it’s an electrical issue I think, not hydraulic.

What could be the issue here? My voltage seems correct and both valves are brand new.

Thanks.