A No Flow alert means that the flow has dropped below the no flow threshold. This can happen when:

• The solenoid plunger is not lifting to allow the valve to open
• The master valve is not opening if in use
• The pump start is not being activated
• A gate valve or isolation valve in the mainline has been closed

When this type of alert occurs, the controller will stop irrigation on the station and raise a No Flow alert. It will then move onto the next station in the scheduled sequence. If three consecutive stations have No Flow alerts, the controller stops irrigation.

Possible Fixes:

• Bleed the corresponding valve manually to determine if water pressure exists.
• Verify the Pump Start is operating correctly.
• Locate and open any closed gate valves.

To clear a No Flow alert from the controller after troubleshooting:

1.  Navigate to the ALERTS menu.

2.  Navigate to view flow status displays.

3.  Press Select then navigate to the affected station, then * button to clear the alert. 

To clear a No Flow alert from WeatherTRAK Central after troubleshooting:

1.  Hover over the Alerts tab and click on Alert List. A list of all active alerts will display.

2.  Place a checkmark next to the alert you would like to clear.

3.  Press the Clear Flow and Electrical Alerts button. A pop-up screen displays asking you to verify the change.

4.  Click Yes.

To learn more about the (NF) No Flow alert, watch the video below: