
Boiler Control Instruction & Operation Manual, Rev 1
Page
48
of 64
Troubleshooting
Sensors Status
Supply
-768 F
Shorted
Figure 22: Sensor Screen
The sensor status screen is selected from the
DIAGNOSTICS
menus. A failed sensor is shown with a white bar and
the type of failure in text below that. Not all analog I/O can be displayed at the same time on the page, so a horizontal
scroll bar is used to move the view left and right to show all analog I/O status.
Each Sensor is provided with the following diagnostic information:
Indication
Possible Cause
Open
Check sensor wiring. Sensor open will show if the sensor has not yet been wired to the
boiler or if a wire is loose.
Shorted
Check sensor wiring. Sensor terminals are connected to each other of the sensor has
failed.
Outside low range
Outside high range
Sensor input is out of range. Sensor is defective or is being subjected to electrical noise.
Not reliable
Sensor is unreliable. Sensor is defective or is being subjected to electrical noise.