Troubleshooting a SmartNode

3 Minute Read

| How to determine if a SmartNode zone has stopped communicating and possible remedies

Objective - Use Facilisight Heatmap Zone condition indicators to determine if there is a communication issue between the SmartNode and the CCU.  

| Normal State

Normally, a SmartNode zone on a heat map shows a healthy green, indicating that the zone is close to the desired setpoint. In the example below, one of the zones is overly warm, and the other a little chilly, but you can tell the SmartNodes are fully functioning since the colors are solid and the current temperature is displayed beneath the zone name.

| Symptoms

In the example below, the larger zone on the right displays with diagonal lines instead of a solid color. Those diagonal lines indicate the zone is in a Zone Dead condition. The current temperature will also display as '0'.  Those are symptoms that the SmartNode is either no longer able to provide a temperature or communicate at all to the CCU.

| Remedy

Remedy for a Sensor Issue - The first thing to try when you see a zone in the Zone Dead condition would be to look at the display of the SmartNode to see if it is lit up. There should be the name of the zone and other status indicators.  If there is a good display, unplugging and replugging the sensor connection (top right side of the SmartNode labeled RTS) may resolve the issue. If that does not resolve the issue, the sensor itself may need to be replaced. 

Remedy for a Power Issue - A SmartNode needs constant 24VAC power to run. If you look at the display of a SmartNode and it is a blank screen, please verify that the wires going into the left side of the SmartNode labeled 'Power In' are properly seated and providing around 24VAC.  If the SmartNode is getting the proper voltage but does not have a lit display, it may need to be replaced.

Remedy for a Connection Issue - If the SmartNode is powered up and shows a good temperature on its display, but is still not providing that data to Facilisight, it may be due to a communication issue between the SmartNode and CCU.  To resolve that issue, delete the SmartNode module from the CCU and re-pair the SmartNode.  Otherwise, contact 75F support to troubleshoot a potential range issue.