Trane XT500C Owner's Manual page 61

Troubleshooting Guide (continued).
Symptom
Heating does not come
on.
Cooling does not come
on.
Possible Cause
No power to the thermostat.
System selection is not set to Heat.
Heating setpoint is below room
temperature.
No power to the thermostat.
System selection is not set to Cool.
Cooling setpoint is above room
temperature.
Check that setpoint is above room temperature.
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 On position.
If 24 Vac is present, proceed with troubleshooting.
Wait five minutes for the system to respond (thermostat
displays Wait).
Set system selection to Heat.
Check that setpoint is below room temperature.
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 On position.
If 24 Vac is present, proceed with troubleshooting.
Wait five minutes for the system to respond (thermostat
displays Wait).
Set system selection to Cool.
61
Action
(continued)
Pub. No. 22-5128-02
69-1216