Trane ReliaTel Diagnostic Manual page 70

Thermostats and Sensors
Error Codes
An error code indicates that technical assistance may be required.
Note: On the display, error codes toggle with the clock.
BAYSENS135A Non-Programmable zone sensor
Figure 47. BAYSENS135A
70
Heat failure Indicates that there is an error in the heating system.
Cool failure Indicates that there is an error in the cooling system.
Test mode Indicates that the system is operating in test mode.
Fan failure Indicates that a fan failure has occurred and service is required.
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RT-SVD03G-EN