XT500C DELUXE PROGRAMMABLE HEAT-PUMP THERMOSTAT
11
69-1404
Pub. No. 18-HD25D2-2
3. Press Increase ▲ again to display the software
identification code.
(Example: 200 = software ID code 200)
4. Press Increase ▲ again to display the software revision
number (Example: 001=Revision number 1).
5. Press the Increase ▲ again to display the model
identification number. (Example: 314 = Model ID 314)
6. Press Run Program to exit the self-test. The self-test
mode times out 5 minutes after the last key press.
CHECKOUT
Outdoor Temperature Sensor
(optional accessory)
Expose the outdoor temperature to outdoor air for a minimum
of five minutes before reading.
TROUBLESHOOTING GUIDE
(
continued
)
Symptom Possible Cause Action
Display will not come
on.
Thermostat is not being
powered.
Check for 24 Vac between R and W terminals.
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the system fuse is blown—replace the fuse.
Check if the power switch on the HVAC equipment is in the Off
position—set to the On position.
Check wiring between thermostat and HVAC equipment—replace any
broken wires and tighten any loose connections.
If 24 Vac is present, proceed with troubleshooting.
Temperature display is
incorrect.
Room temperature
display has been
reconfigured.
Enter Installer Setup number 37 and reconfigure the display.
Thermostat is configured
for °F or °C display.
Enter Installer Setup number 14 and reconfigure the display.
Bad thermostat location. Relocate the thermostat.
Temperature
displaying digits as
dashes (---).
Internal temperature
measurement failure.
Contact distributor or retailer.
Temperature settings
will not change.
(Example:
The upper or lower
temperature limits were
reached.
Check the temperature setpoints:
Heating limits are 55 to 85°F (13 to 29°C).
Cooling limits are 65 to 99°F (18 to 37°C).
Cannot set the
heating higher or the
cooling lower.)
The setpoint temperature
range stops were
configured.
Check Installer Setup numbers 34 and 35 and reconfigure the
setpoint stops.
Heating will not come
on.
No power to the
thermostat.
Check for 24 Vac between R and W terminals.
If missing 24 Vac:
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the system fuse is blown—replace the fuse.
Check if the power switch on the HVAC equipment is in the Off
position—set to the On position.
Check wiring between thermostat and HVAC
equipment—replace any broken wires and tighten any loose
connections.
If 24 Vac is present, proceed with troubleshooting.
M14615
M14616
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