Honeywell T7350 Installation Instructions

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
62-0195—04 8
TROUBLESHOOTING GUIDE (TABLE 4)
Table 4. Troubleshooting Information.
Symptom Possible Cause Action
Display will not
come on.
Thermostat is not being powered. 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.
Temperature
display is
incorrect.
Room temperature display has
been recalibrated.
Use PDA configuration software to recalibrate as desired.
Thermostat is configured for °F or
°C display.
Press both Run Schedule and Copy, then reconfigure the
display.
Bad thermostat location. Relocate the thermostat.
Display shows three dashes and a
degree sign (all systems shut
down).
T7350 is set for remote sensing and sensor is missing or circuit
is either open or shorted.
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.

Honeywell T7350 Specifications

General

Brand	Honeywell
Model	T7350
Category	Thermostat
Language	English