Trane TAYSTAT 575 Installation Instructions Manual page 11

Symptom
Cooling does not No power to the thermostat.
come on.
Thermostat minimum off time is
activated.
System selection is not set to
Cool.
System On Heating equipment is not
indicator is lit, but operating.
no heat is being
delivered.
Outdoor Option not activated.
temperature
a
not displayed .
Outdoor sensor is connected
Outdoor
incorrectly.
temperature
display is
Incorrect sensor.
a
incorrect .
a
Available on select models.
Troubleshooting Guide (Continued)
Possible Cause
ELECTRONIC HEAT PUMP THERMOSTAT
• Check that B terminal is connected to the system
transformer.
• Check for 24 Vac between B and R and Y 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 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 and tighten
any loose connections.
— If 24 Vac is present, proceed with troubleshooting.
• Wait up to five minutes for the system to respond.
• Enter Installer Setup mode number 33. Reconfigure
minimum off time (if required).
Set system selection to Cool.
Verify operation of heating equipment in system test.
Enter Installer Setup mode number 24 and set to 01.
Thermostat must have OT terminals and a TAYSENS100A
installed.
Refer to TAYSENS100A installation instructions and check
wiring between the thermostat and sensor.
Replace sensor with TAYSENS100A Sensor.
11
Action
Pub. No. 11-HD28D2-1
69-1591–1