POC High Flow Shutdown

Info, impact, causes, and troubleshooting a "POC High Flow Shutdown" message.

Common Causes 

• Break on Mainline.  
• Flow limit is set too low.

What happens now?

• Alert: Control Point 1 (CP1) closed Mainline1. 
• Expected vs Actual Flow (measured in gallons per minute (GPM)) are given. The controller expected a 60 GPM, but it only measured a 71.5 GPM.
• The master valve closes and Mainline 1 is no longer pressurized and no water will be delivered to the zones, until the message is cleared. 

Troubleshooting 

• Involves inspecting and repairing any breaks in the mainline.
• It is also possible for the flow limit to be set too low and needs adjustment. 
• Once the issue is resolved, you can clear the message to resume irrigation.
  • To find flow limit in BaseManager → Flow Setup → Control Points.
    • Ex: under Design Flow may be set to 50 GPM based on the mainline hydraulic capacity. A 60 GPM high flow limit reflects a 20% variance. If the Shutdown box is checked, this means the system will both send an alert and shut down when that limit is exceeded.