Trane Technologies X1316105702, Installation, Operation And Maintenance Manual

Page: 32 / 48

32 BAS-SVX10F-EN
Maintenance and Troubleshooting
Maintenance and Troubleshooting
This section describes sensor features that can be used for maintenance and troubleshooting.
LEDs
Some sensor models have LEDs. They are located on the front cover and convey the following
information:
Service LED (red)
The red service LED indicates that service is needed.
• The LED may blink or stay on solid, depending on the unit controller
Cool LED (green)
The green cool LED indicates that the system is in cooling mode.
• Stays on solid during normal cooling operation
• Blinks to indicate a cooling system failure
Heat LED (green)
The green heat LED indicates that the system is in heating mode.
• Stays on solid during normal heating operation
• Blinks to indicate a heating system failure
System LED (green)
The green system LED indicates the state of the system.
• Stays on solid to during normal operation
• Blinks to indicate that the system is in Test mode
Error Codes (Display Sensor)
For an explanation of error codes that can appear on the display, see “Error codes,” p. 31 .
Display Sensor: Output Values—Failure and Default Modes of
Operation
The following table provides output values for failure and default modes of operation, which can
be used for troubleshooting.
Heating
setpoint
output
Fan/System
output
Sensor has no power. Open Open Open Open
Thermistor in sensor has failed to either open or
close. Open Normal value
(See
Table 1 )
Normal value
(See
Table 1 )
N/A
Setpoint potentiometer has failed to either open or
close. Normal value
(See
Table 1 )
Open Open N/A
Situation
Zone
temperature
output
Zone setpoint
output