T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
63-4355—1
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CROSS REFERENCE
All T7300/Q7300 Series 2000 models are different from the existing T7300/Q7300 T8611 and T8621 devices as summarized in
Table 15.
Fig. 15. Differences from existing T7300/Q7300 to new T7300/Q7300 Series 2000 devices.
Table 14. Troubleshooting Information
(Continued).
Symptom
Possible Cause
Action
Heating will not come
on
(Continued).
Thermostat minimum off time is
activated and wait indicator is
displayed.
•
Wait up to five minutes for the system to respond.
•
Enter Installer Setup number 38. Reconfigure minimum off
time (if required).
System selection is not set to
Heat.
Set system selection to Heat.
Cooling will not come
on.
No power to the thermostat.
•
Check that X terminal is connected to the system transformer
•
Check for 24 Vac between X and R or RC 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.
Thermostat minimum off time is
activated and wait indicator is
displayed.
•
Wait up to five minutes for the system to respond.
•
Enter Installer Setup number 33. Reconfigure minimum off
time (if required).
System selection is not set to
Cool.
Set system selection to Cool.
System on
indicator (flame=heat,
snowflake=cool) is
Conventional heating equipment
turns on the fan when the furnace
has warmed up to a setpoint.
Wait a minute after seeing the on indicator and then check the
registers.
displayed, but no warm
or cool air is coming
from the registers.
Heating or cooling equipment is
not operating.
Verify operation of heating or cooling equipment in self-test.
(Continued)
Refer to Table 16 for thermostat and subbase cross referencing information.
Table 16. Thermostat and Subbase Cross Reference.
Model
Number
Description
Trade Replacement
Remarks
Q7300A
Multistage conventional subbase; system switch: none; fan switch: none.
Q7300A1000
One-stage heat and one-stage cool.
T7300F2002/Q7300A2008
Q7300A1018
Two-stage heat and two-stage cool.
T7300F2002/Q7300A2016
Q7300A1034
One-stage heat and one-stage cool; Trane
part no. BAS-0444.
T7300F2002/Q7300A2008
Feature/Function
Present T7300/Q7300, T8611, T8621 Families
T7300/Q7300 Series 2000 Family
System switching
Mechanical switch on Q7300 subbase
Keyboard entry on T7300 thermostat
Fan switching
Mechanical switch on Q7300 subbase
Keyboard entry on T7300 thermostat
Installer configuration
Field settings made via DIP switches on the back of
the thermostat and subbase
Field settings made through the T7300
thermostat keyboard
Device color
Beige or Premier White® color
Taupe or Premier White® color
