8
NOTE: Resetting the thermostat by pressing the RESET button will erase all user settings.
This will return all Thermostat settings to their default values. Changing ˚F / ˚C temperature
scale default should be done prior to installation and before any programming to avoid loss
during reset step.
6.6
Changing Fahrenheit (°F) to Celsius (°C)
6.8
Resetting Thermostat
6.7
Low Battery Detection and Replacement
1.
Release the front thermostat body from the rear thermostat body by pressing the release
latch on the bottom of the thermostat.
2.
Gently separate the two thermostat halves and turn the front thermostat body over exposing
the rear view of the circuit board.
3.
Locate the internal ˚F / ˚C switch on the circuit board.
4.
Using your fingers, gently flip the switch towards the preferred temperature ˚F / ˚C scale.
5.
Re-attach the front thermostat body by locating the top mounting lugs and swinging the
thermostat down until the release latch locks.
6.
Press the RESET button on the front of the thermostat using a paper clip or a small pencil
tip.This will register the new temperature scale default.
This thermostat requires two (2) properly installed "AA" alkaline batteries to provide power
for the thermostat to properly control the system operation. The system must have 24 Volt AC
power present for proper system operation and control.
This thermostat is equipped with a low battery detection feature that constantly monitors the
batteries during normal operating mode to
determine whether they have sufficient power
to provide proper operation.
When this feature determines that the battery
status is low, a low battery indicator will appear
in the display. It is recommended that the
batteries be replaced immediately to maintain
system operation and program settings.
Replacing the Batteries
6.7.1
1.
Open front thermostat door and locate the battery compartment door.
2.
Gently remove the two "AA" alkaline batteries located in the battery compartment.
3.
Install two new "AA" alkaline batteries into battery compartment. Make sure to match
the positive (+) ends of the batteries with the positive (+) terminals located in the battery
compartment.
4.
Close battery compartment and verify that the low battery indicator does not appear in
the display.
The Reset feature allows the user to completely reset the thermostat to register new manual
switch settings and return to factory set software settings.
1.
To erase all entered programs settings, gently press RESET button using a paper clip or a
small pencil tip.
2.
This will return all Thermostat settings to their default values and register all new manual
switch settings for proper operation.
ADDITIONAL
OPERATION FEATURES
6
cont.
9
TROUBLESHOOTING
7
cont.
SYMPTOM POTENTIAL SOLUTION
Thermostat turns
heating or cooling
system on too often
or not often enough.
Increase or decrease temperature differential setting as
appropriate to provide the desired performance level. See
Setting Temperature Differential section of this manual.
Thermostat does not
turn on heating or
cooling system.
Check to see if OFF is shown in display. This indicates that the
system is turned off at the thermostat. Move the system selector
switch to the HEAT or COOL position. After the compressor short
cycle protection 5-minute period expires the system should start
within a minutes time.
Compressor protection features may be in effect due to
compressor short cycle conditions. See Compressor Protection
Feature section for full explanation of this feature.
Heating or cooling system may be malfunctioning. Call a
professional service technician immediately to verify system
operation.
Thermostat turns on
heating instead of
cooling.
Check thermostat wiring to make sure that the heating and
cooling stages are connected to the correct terminals on the
wiring terminal block. See Installation and Wiring Diagrams
sections of this manual.
Thermostat turns on
cooling instead of
heating.
Check thermostat wiring to make sure that the heating and
cooling stages are connected to the correct terminals on the
wiring terminal block. See Installation and Wiring Diagrams
sections of this manual.
Low battery indicator
is shown in
thermostat display.
Replace batteries immediately to maintain proper system
operation. See Low Battery Detection and Replacement section
of this manual.
OFF is shown in
thermostat display
and heating or
cooling system will
not start.
This indicates that the system is turned off at the thermostat.
The must be in HEAT or COOL modes of operation to control the
heating or cooling system. Move the system selector switch to
the HEAT or COOL position.
Thermostat display
is blank.
It is possible that the batteries are drained and not providing
power for the thermostat to control the system. Replace
batteries immediately to maintain proper system operation. See
Low Battery Detection and Replacement section of this manual.
If you replace the batteries and the display does not appear, call
a professional service technician to verify thermostat and
system performance.
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