Troubleshooting Guide - Trane XT500C Owner's Manual

TROUBLESHOOTING GUIDE

Symptom
Display does not come
on.
Temperature setting
does not change
(Example: cannot set the
heating higher or the
cooling lower).
Possible Cause
Thermostat is not being
powered.
The upper or lower temperature
limits were reached.
Check if the thermostat is mounted and latched on the
wallplate—mount and latch the thermostat on the
wallplate.
Check if the circuit breaker is tripped—reset the circuit
breaker.
Check if the fuse is blown—replace the fuse.
Check if the system switch at the equipment is in the Off
position—set to the On position.
Check wiring between thermostat and HVAC equipment—
replace any broken wires.
If 24 Vac is present, proceed with troubleshooting.
Check that the temperature setpoints are:
Heating: 55 to 85 F (13 to 29 C)
Cooling: 65 to 99 F (18 to 37 C).
60
Action
(continued)
Pub. No. 22-5128-02
69-1216