Honeywell T7300D User Manual

T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
63-4355—223
Fig. 18. Use of external relay and transformer for auxiliary loads greater than 1.6A.
M4944
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
RELAY REQUIRED (R8222 OR SIMILAR).
Q7300 SUBBASE
TO
LOAD
AUXILIARY
RELAY
CONTACTS
A1
A2
A3
TROUBLESHOOTING GUIDE
Refer to Table 14 for troubleshooting information.
Table 14. 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 R or RH terminals.
— If missing 24 Vac:
— check if the circuit breaker is tripped; if so, reset the
circuit breaker.
— check if the system fuse is blown; if so, replace the
fuse.
— check if the power switch on the HVAC equipment is
in the Off position; if so, set to the On position.
— check wiring between thermostat and HVAC
equipment and 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.
Display shows two dashes and a
degree sign.
Installer Setup 22 is set for remote sensing and the sensor is
missing or the circuit is open or shorted.
Temperature settings
will not change.
(Example: Cannot
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)
set heating higher or
cooling lower.)
The setpoint temperature range
stops were configured.
Check Installer Setup number 34 and 35 and reconfigure the
setpoint stops.
Keypad is locked. When a locked
key is pressed,
LOC flashes on
the LCD.
• Reset DIP switch 1 on back of thermostat to enable keypad.
• Enter Installer Setup number 25 or 40 and reconfigure
keypad lockout level.
Unable to configure
Installer Setup
Installer Setup is locked out. Reset the DIP switch 1 on back of thermostat to enable
keypad.
(continued)

Honeywell T7300D Specifications

General

Brand	Honeywell
Model	T7300D
Category	Thermostat
Language	English