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 low 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.
- To find flow limit in BaseManager → Flow Setup → Control Points.