Troubleshooting Guide - Honeywell SERIES 2000 T7300D User Manual

T7300D SERIES 2000 COMMERCIAL MICROELECTRONIC THERMOSTAT
5. Press the increase
EEPROM identification code. (Example: 314=
EEPROM ID 314)
6. Press the increase
subbase identification code. (Example: C=
conventional subbase)
7. Press Run Program to exit the system test. The
system test times out after four minutes without any
key presses.
Setting Keypad Lockout Switch
The DIP switch 1 on the back of the thermostat activates
the lockout feature. The switch must be set to the ON
position (up) to activate the lockout feature. See Fig. 7.

TROUBLESHOOTING GUIDE

Symptom
Display will not
come on.
Temperature display
is incorrect.
Temperature settings
will not change.
(Example: Cannot
set heating higher or
cooling lower.)
62-0123—3
key again to display the
M4933A
key again to display the
M10289
Possible Cause
Thermostat is not being
powered.
Room temperature display
has been reconfigured.
Thermostat is configured for
F or C display.
Bad thermostat location.
Display shows two dashes
and a degree sign.
Upper or lower temperature
limits were reached.
The setpoint temperature
range stops were configured.
Keypad is locked. When a
locked key is pressed, LOC
will flash on the LCD.
The factory-setting is off (down). Remove the thermostat
from the subbase and set the switch to ON if keypad
lockout is desired. Setting DIP switch 1 to the ON position
disables all of the keys on the thermostat.
BACK OF THERMOSTAT
Fig. 7. Setting the keypad lockout DIP switch 1
on the back of the thermostat.
NOTE: DIP switch 1 should be set to ON prior to entering
Installer setup. This only applies when changing
Installer setup number 25 or 40.
• 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—reset the
circuit breaker.
— check if the system fuse is blown—replace the
fuse.
— check if the power switch on the HVAC
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.
Enter Installer Setup number 37 and reconfigure the display.
Enter Installer Setup number 14 and reconfigure the display.
Relocate the thermostat.
Installer Setup 22 is set for remote sensing and the sensor is
missing or the circuit is open or shorted.
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)
Check Installer Setup number 34 and 35 and reconfigure the
setpoint stops.
• Reset DIP switch 1 on back of thermostat to enable
keypad.
8
ON
1
1 2
1 DIP 1 IS ON
2 DIP 2 IS NOT USED.
Action
2
M10235
(continued)