12
NOTE: Resetting the thermostat by pressing the RESET button will erase all entered
programs, current time of day, day of week and other 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.
NOTE: This thermostat requires 24 Volt AC power for normal operation and control of
the heating or cooling systems. This thermostat also requires two (2) properly installed
"AA" alkaline batteries to retain user settings and programs in the event of loss of AC
Power due to power outage or rolling blackouts.
6.8
Low Battery Detection and Replacement
6.9
Resetting Thermostat
This thermostat is equipped with a low battery detection feature that constantly monitors the
back-up batteries during normal operating mode to determine whether they have sufficient
power to provide proper back-up operation.
When this feature determines that the back-up batteries status is low, low battery indicator
will appear in the display. The thermostat will continue to function normally if AC power is
provided, but it is strongly recommended to change the back-up batteries as soon as
possible to avoid possible program loss due to AC power outage or rolling blackouts. This
thermostat requires 24 Volt AC Power for normal operation and control of the heating or
cooling systems.
6.10
LED Status Indicator
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 second stage of heating is active. The
auxiliary stage of heating is usually the least economical stage of heat.
ADDITIONAL
OPERATION FEATURES
6
cont.
Replacing the Back-up Batteries
6.8.1
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
˚F / ˚C temperature scale switch settings.
1.
To erase all entered programs, current time of day, day of week and other user 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
˚F / ˚C temperature scale switch settings.
13
TROUBLESHOOTING
7
cont.
Verify your program setpoint time entries. The heating and
cooling programs utilize the same setpoint times, but have
individual setpoint temperatures for the MORN, DAY, EVE and
NIGHT setpoints. See Setting Your Energy Saving Program
section of this manual.
Thermostat program has been temporarily overridden and
program indicator is flashing in the display. Wait till next
setpoint and the temporary override will expire or change
setpoint temperature to desired comfort level.
Thermostat program is in Permanent Hold (Vacation) Mode and
HOLD and TEMP is showing in display. Press HOLD button to
release permanent hold and return the thermostat to normal
program operation.
Thermostat turns
heating or cooling
system on too often
or not often enough.
Increase or decrease first stage temperature differential setting
as appropriate to provide the desired performance level. See
Setting Temperature Differential and Residual Cooling Fan
Feature section of this manual.
Thermostat turns on
second (auxiliary)
stage of heating or
cooling too quickly or
not quickly enough.
Increase or decrease second (auxiliary) stage temperature
differential setting as appropriate to provide the desired
performance level. See Setting Temperature Differential and
Residual Cooling Fan Feature section of this manual.
SYMPTOM POTENTIAL SOLUTION
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
section for full explanation of this feature.
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.
Thermostat will not
follow program
setpoints.
Check current time of day, day of week program settings. Make
sure to verify AM/PM indicator is accurately displaying desired
time settings. See Setting Current Time of Day and Day of Week
section of this manual.
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 several seconds.
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