Step-by-Step Guide
When a POC high pressure shutdown occurs, the message displays the following information:
POC High Pressure Shutdown with the date and time of the event (for example, January 1st, 2021 at 8:30 AM). The priority level is marked as High.
The message indicates that Control Point High Pressure Detected and that Control Point Water Has Been Shut Down.
Key details included in the message are:
- Control Point number (for example, Control Point = 1)
- Pressure Sensor identification (for example, Pressure Sensor = P000309)
- Limit Versus Value showing the pressure threshold compared to the actual pressure reading (for example, Limit Versus Value = 60 versus 63.5)
What Happens During a High Pressure Shutdown
When the high pressure shutdown is triggered, the master valve closes immediately. This means the affected mainline has no pressurized water, and no water will be supplied to any zones on that mainline until the pressure changes and the message is cleared.
For example, if the master valve controlling mainline 1 is closed, mainline 1 becomes isolated and all zones downstream of that mainline will not have water. Other mainlines in the system, such as mainline 2, are not affected by the shutdown on mainline 1.
How Pressure Sensors Work with Control Points
Pressure sensors like the BL5406 allow pressure to influence a control point or master valve. These sensors can also be used to trigger other actions based on set pressure values.
In the example message, control point 1 closed due to the pressure input from sensor P000309. The limit and value pressures are measured in pounds per square inch (PSI). The pressure trigger point was set to 60 PSI, and the controller reacted when the pressure increased to 63.5 PSI.
Common Causes for POC High Pressure Shutdown
The most common cause for a POC high pressure shutdown message is setting up a pressure sensor to influence a control point, and then the pressure changing enough to trigger that control point to shut down.
Troubleshooting a POC High Pressure Shutdown
When troubleshooting a POC high pressure shutdown, first determine whether this is simply an alert or an actual problem that needs to be addressed.
If you normally have pressure fluctuations in your system, this may be an expected alert. However, if pressure fluctuations are not normal, you need to find the cause of the pressure increase.
One possibility is that the pressure limit is set too low and needs to be adjusted to accommodate normal operating conditions.
Once the underlying issue has been resolved, clear the message to allow irrigation to begin again.
Locating and Adjusting the Control Point Pressure Limit
The control point pressure limit settings are found on the Flow Setup tab under Control Points.
Within the control point settings, locate the High Pressure Limit field. This is where you set the pressure threshold in PSI (for example, 60 PSI).
Below the pressure limit value, you'll find a Shutdown checkbox. When this box is checked, the system will both generate a message and execute a shutdown if the pressure limit is exceeded. If the box is unchecked, the system may only generate an alert without shutting down the control point.
Video Walkthrough
Video originally published July 2021.
If you have questions, here are 3 ways to get answers:
1. Search within this Baseline knowledgebase
2. Visit the Baseline support page
3. Call 866-294-5847 or email support@baselinesystems.com, hours are from 6:00 am to 7:00 pm Eastern Time or 4:00 am to 5:00 pm Pacific Time.