Install Instructions

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
7 62-0195—06
Temperature
settings will not
change.
(Example:
Cannot set
heating higher or
cooling lower.)
Upper or lower temperature limits were
reached.
Check the temperature setpoints:
• Heating limits are 40 to 90°F (7 to 31°C)
• Cooling limits are 45 to 99°F (9 to 37°C)
Occupied setpoint temperature range
stops were configured.
Using a PDA, check setpoint stops. If necessary,
reconfigure the stop(s).
Keypad is locked. When a locked key is
pressed, LOCKED appears momentarily
on the LCD.
• Use PDA (Set, Display) to unlock keypad.
• Press both Run Schedule and Copy, then change
keypad lock level.
Room
temperature is
out of control.
Remote temperature sensing is not
working.
Check all remote sensors.
Heat 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 RH terminals.
If missing 24 Vac:
• Check if circuit breaker is tripped; if so, reset circuit
breaker.
• Check if system fuse is blown; if so, replace fuse.
• Check if the HVAC equipment power switch is in the
Off position; if so, set to the On position.
• Check wiring between thermostat and HVAC
equipment. Replace broken wires and tighten loose
connections.
If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off time is activated. Wait up to five minutes for the system to respond.
Use PDA to configure heating response.
System selection is set to Off or Cool. Set system selection to Heat or Auto.
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 RH terminals.
If missing 24 Vac:
Check if circuit breaker is tripped; if so, reset circuit
breaker.
Check if system fuse is blown; if so, replace fuse.
Check if the HVAC equipment power switch is in the Off
position; if so, set to the On position.
Check wiring between thermostat and HVAC
equipment. Replace broken wires and tighten loose
connections.
If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off time is activated. Wait up to five minutes for the system to respond.
Use PDA to configure cooling response.
System selection is set to Off or Heat. Set system selection to Cool or Auto.
System indicator
(flame: heat,
snowflake: cool)
is displayed, but
no warm or cool
air is coming from
the registers.
The call for heat or cool is not yet given. Check if any stage indicators (dots next to the system
indicator) are displayed. With no display of stage
indicators, no call for cool/heat is yet given.
For T7350M models only: Check the information
screens. A MODHEAT or MODCOOL percentage of
zero indicates a signal of 4 mA from the given terminal.
Conventional heating equipment turns the
fan on only after the furnace has warmed
to a setpoint.
Wait one minute after seeing the on indicator and then
check the registers.
Heating or cooling equipment is not
operating.
Verify operation of heating or cooling equipment in self-
test.
Table 4. Troubleshooting Information. (Continued)
Symptom Possible Cause Action