8
9
TROUBLESHOOTING
6
1.
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. Be 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.
In order to maximize comfort and energy efficiency, this thermostat is equipped with an
Adaptive Recovery Mode (ARM™). This feature minimizes the amount of time required by
heating or cooling system to reach the new setpoint, after a setback period is completed, and
assures your desired temperature is achieved at your set program times.
This feature activates when recovering room temperature from setback programs to comfort
programs, so it will only take place when the current (heating) program setpoint temperature is
lower than the upcoming program set point temperature, or the current (cooling) program
setpoint temperature is higher than the upcoming program setpoint temperature.
During ARM™, room temperature is recovered gradually by turning on the heating or cooling
before the end of the setback period. The set point temperature is changed to that of the
upcoming comfort program temperature. The start time of recovery is based on the difference
between the current room temperature and the upcoming comfort program setpoint
temperature. The recovery to the upcoming setpoint starts 10 minutes before the upcoming
setpoint time for each degree of temperature change required, up to a maximum of 2 hours.
ARM™ does not operate when the unit is in the
HOLD
mode, or if the program is temporarily
overridden.
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 minute’s time.
Compressor protection features may be in effect due to
compressor short cycle conditions, power outages or rolling
blackouts. See
Compressor Protection
, section 5.4 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 or 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. For heat pump systems, check that the
O/B switch is set to the correct position. See
Installation and
Wiring Diagrams
sections of this manual.
Verify your program time and temperature entries. The heating
and cooling programs utilize separate times and temperatures
for the
MORN
,
DAY
,
EVE
and
NIGHT
setpoints. See
Setting Your
Energy Saving Programs
, section 4.4 of this manual.
Thermostat program has been temporarily overridden and
program indicator is flashing in the display. Press
RETURN
button to return the thermostat to normal program operation or
wait until next setpoint and the temporary override will expire.
Thermostat program is in Extended Hold (Vacation) Mode and
HOLD
and
TEMP
is showing in display. Press
HOLD
or
RETURN
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,
section 4.3.1 of this manual.
Thermostat will not
follow program
setpoints.
Check current time of day, day of week program settings. Be
sure to verify
AM/PM
indicator is accurately displaying desired
time settings. See
Setting Current Time of Day and Day of Week,
section 4.2 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.
ADDITIONAL
OPERATION FEATURES
5
cont.
5.6
Adaptive Recovery Mode (ARM™)
The Reset feature allows the user to completely reset the thermostat to register new
manual switch settings. To erase all entered programs, current time of day, day of week
and other user settings, gently press the
RESET
button using a paper clip or a small
pencil tip.
5.8
Resetting the Thermostat
5.7
Filter Check Monitor (see section 4.3.3 for setting)
The Filter Check Monitor displays a reminder for required filter replacement or cleaning, by
flashing the
FILT
segment in the display. See instructions on your filter or heating/cooling
unit for recommendations for interval setting.
When the selected interval has been reached, and required cleaning or replacement has
been performed, press the
RETURN
button in any normal mode to reset the timer and turn
off the warning.
5.5
Low Battery Detection and Replacement
cont.
