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ADDITIONAL
5
OPERATION FEATURES
Recirculating Fan Mode
(see section 4.4)
5.3
The Recirculating Fan Mode provides more even temperature distribution and improves
indoor air quality by circulating air through the furnace filtration system more often.
The Recirculating Fan Mode can be selected by moving the fan switch to the recirculate
position
. If no call for heating or cooling occurs within the fan off cycle set in section
®
4.4, the fan will run for 12 minutes. The highest setting, 120 minutes (factory default), will
run the fan least often–10% minimum run time. The lowest setting, 40 minutes, will run the
fan most often–30% minimum run time. During any call for heating or cooling, fan control
operates in the AUTO mode. This feature is available in the HEAT, OFF, or COOL mode.
Keypad Lockout
5.4
To prevent accidental or undesired adjustment of the
thermostat set point, the Keypad Lockout feature
disables the operation of the temperature setting keys,
but not the backlight key. In order to enable the
keypad lock, press and hold either the
or
together with the backlight button for 5 seconds. The
LOCK icon in the display will flash once per second,
then appear continuously in the display. The keypad is now locked.
To unlock the keypad, press and hold either the
for 1 second. The LOCK icon will disappear from the display, and the keypad is now unlocked.
Compressor Protection
5.5
This thermostat includes an automatic compressor protection feature to avoid potential
damage to the system from short cycling. This thermostat automatically provides a 5-minute
delay after turning off the cooling output to protect the compressor.
NOTE:
The installer can reset the thermostat and bypass the compressor protection
features by pressing the RESET button. This will erase all user program settings and should
only be used during installation for testing purposes or to reset a thermostat to regain normal
operation. This will return all thermostat settings to their default values. The user will have to
re-program all of the erased settings.
cont.
button
or
button together with the backlight key
6
ADDITIONAL
5
OPERATION FEATURES
Resetting Thermostat
5.6
The Reset feature allows the user to completely reset the thermostat. To erase all entered
program settings, gently press the RESET button using a paper clip or a small pencil tip.
This will return all thermostat settings to their default values and register all new manual
switch settings.
LED Status Indicator
5.7
The LED status indicator located on the front of your thermostat above the display will notify
you of key system information.
AUX (Green): This will turn on when the auxiliary stage of heating or cooling is active.
6
TROUBLESHOOTING
SYMPTOM
POTENTIAL SOLUTION
Check to see if OFF is shown in display. This indicates that the
Thermostat does not
system is turned off at the thermostat. Move the system selector
turn on heating or
switch to the HEAT or COOL position. After the compressor short
cooling system.
cycle protection 5-minute period expires, the system should
start within a minute.
Compressor protection features may be in effect due to
compressor short cycle conditions. See Compressor Protection
section for full explanation of this feature.
Check thermostat wiring to make sure that the heating and
Thermostat turns on
cooling stages are connected to the correct terminals on the
heating instead of
wiring terminal block. See Installation and Wiring Diagram
cooling or cooling
sections of this manual.
instead of heating.
Thermostat turns
Increase or decrease first stage temperature differential setting
as appropriate to provide the desired performance level. See
heating or cooling
Setting Temperature Differential and Residual Cooling Fan
system on too often
Feature section of this manual.
or not often enough.
Thermostat turns on
Increase or decrease second (auxiliary) stage temperature
differential setting as appropriate to provide the desired
second (auxiliary)
performance level. See Setting Temperature Differential and
stage of heating or
Residual Cooling Fan Feature section of this manual.
cooling too quickly or
not quickly enough.
OFF is shown in
This indicates that the system is turned off at the thermostat.
Move the system selector switch to the HEAT or COOL position.
thermostat display
After the compressor short cycle protection 5-minute period
and heating or
expires the system should start within several seconds.
cooling system will
not start.
cont.
7
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