Lennox Ellite Series Thermostat User Manual

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OWNER’S  
GUIDE  
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Dallas, Texas, USA  
Elite® Series  
Programmable Touch Screen Thermostats  
IMPORTANT  
Read and save these instructions.  
505,045M  
1/2005  
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Table of Contents  
Thermostat Features  
Page 3  
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Page 6  
Page 7  
Page 8  
Page 11  
Page 12  
Page 13  
Page 14  
Page 15  
Page 16  
Page 17  
Page 18  
Page 19  
Page 21  
Page 22  
Page 23  
Page 23  
Page 24  
Page 25  
Page 30  
Thermostat Display  
System Settings  
Fan Settings  
Program Your Heating and Cooling Schedule  
Fan Schedule  
Cancel a Schedule Period  
Set the Time  
Override Temperature Setting −− Temporary Hold  
Override Temperature Setting −− Permanent Hold  
Override Temperature Setting −− Vacation Hold  
Temperature Recovery Feature  
Clean the Thermostat Screen  
Battery Replacement  
Reminder Timers  
Built−In Compressor Protection  
Outdoor Temperature  
Advanced Heat Pump Features  
Screen Lock  
Advanced Settings  
Troubleshooting Tips  
Page 2  
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Thermostat Features  
DLarge, clear display with backlight shows the current tem-  
perature, the current temperature setting and the time −−  
even in the dark.  
DMenu−driven programming makes set−up effortless.  
DTouch screen interaction.  
DReal−time clock keeps time during power failures and auto-  
matically converts to daylight savings time.  
DꢀSaving Changes" notification assures you that changes  
have been saved.  
DChange / check reminders let you know when it is time to re-  
place filters, UV lamps, batteries, etc.  
DOverride options allow you to easily override the pro-  
grammed schedule.  
DSame−schedule programming allows you to program a  
schedule for several days at once. No need to copy.  
DArmchair programming allows you to remove the thermo-  
stat from the wall while you program your schedules.  
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Thermostat Display  
SYSTEM  
SELECT EMERGENCY  
HEAT, HEAT, OFF OR COOL  
UP ARROW  
RAISES  
TEMPERATURE  
SETTING  
FAN  
SELECT AUTO,  
ON OR CIRC  
DOWN ARROW  
LOWERS  
TEMPERATURE  
SETTING  
TUE  
FAN  
Inside  
AUTO  
Set To  
Following  
Schedule  
SYSTEM  
Outside  
HEAT  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
SCHED  
SELECT TO  
ENTER  
SCHEDULE  
MODE  
CLOCK  
USED TO SET  
THE TIME  
FORWARD OR  
BACK  
MORE  
SHOWS FURNACE  
FILTER, UV LIGHT  
OR HUMIDIFIER  
PAD CHANGE  
REMINDER  
HOLD  
SCREEN  
SETS A PERMANENT  
HOLD AND ACTIVATES  
VACATION HOLD  
LOCKS TOUCH  
SCREEN FOR  
CLEANING  
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Thermostat Display (Continued)  
TUE  
SHOWS CURRENT  
DAY OF THE WEEK  
INSIDE  
SHOWS CURRENT  
INSIDE TEMPERATURE  
FAN  
SHOWS FAN  
SETTING  
SET TO  
SHOWS CURRENT  
TEMPERATURE  
SETTING  
TUE  
FAN  
Set To  
Inside  
AUTO  
Following  
Schedule  
SYSTEM  
Outside  
HEAT  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
SYSTEM  
SHOWS  
CURRENT  
SYSTEM  
POSITION  
OUTSIDE  
SHOWS CURRENT  
OUTSIDE TEMPERATURE  
(If system includes outside  
temperature sensor)  
FOLLOWING  
SCHEDULE  
TIME  
SHOWS CURRENT  
TIME OF DAY, HOLD  
INDICATES THAT  
THERMOSTAT IS  
FOLLOWING THE  
PROGRAMMED  
SCHEDULE  
TIME REMAINING OR  
NUMBER OF VACATION  
DAYS REMAINING  
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System Settings  
TUE  
FAN  
Set To  
Inside  
AUTO  
Following  
Schedule  
SYSTEM  
Outside  
HEAT  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
PRESS SYSTEM  
SELECT SETTING OF HEAT,  
OFF, COOL OR EM HEAT  
(Heat pump systems only)  
SYSTEM SETTINGS  
The system setting options vary based on your heating  
and/or cooling type.  
HEAT −− Thermostat controls heating system.  
OFF −− Both heating and cooling systems are off.  
COOL −− Thermostat controls cooling system.  
AUTO −− The thermostat switches the system from the  
heating mode to the cooling mode based on tempera-  
ture.  
EM HEAT −− Heat pump systems only −− Thermostat  
controls emergency heat and auxiliary heat, if needed.  
Heat pump compressor is not operational.  
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Fan Settings  
FAN SETTINGS  
ON −− Fan runs continuously. Use this setting for im-  
proved air circulation or for more efficient central air  
cleaning.  
AUTO −− Fan runs only when heating or cooling sys-  
tem is on.  
CIRC −− Fan runs randomly approximately 35% of the  
time. Use this setting for improved air circulation or for  
more efficient central air cleaning when you do not  
want the fan to run continuously.  
PRESS FAN.  
SELECT SETTING:  
ON, AUTO OR CIRC.  
TUE  
FAN  
Set To  
Inside  
AUTO  
Following  
Schedule  
SYSTEM  
Outside  
HEAT  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
Page 7  
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Program Your Heating and Cooling Schedule  
NOTE − The thermostat includes a battery which makes it  
possible for you to remove the thermostat from the wall-  
plate during program. See page 19.  
Your thermostat can control up to four different schedule peri-  
ods per day:  
Wake −− Time when you awaken and want your home at a  
comfortable temperature.  
Leave −− Time when you leave the home and prefer an ener-  
gy−saving temperature setting.  
Return −− Time when you return home and want your home to  
return to a more comfortable temperature setting.  
Sleep −− Time when you are asleep and prefer an energy−  
saving temperature setting.  
NOTE − Schedule times are in 15−minute intervals.  
EDIT THE SCHEDULE:  
1 − Press the SCHED key. The SCHEDULE screen will be  
displayed.  
2 − Press the EDIT key. The screen will change to display the  
days of the week across the top.  
MON  
TUE  
WED  
THU  
FRI  
SAT  
SUN  
OK TO PICK MULTIPLE DAYS  
CANCEL  
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Program Your Heating and Cooling Schedule (Cont.)  
3 − Select any combination of days to edit. You may select  
multiple days. These should be days that you wish to follow  
the same schedule. Check marks appear next to the days  
that are selected. After the first day is selected, the SCHED-  
ULE screen returns to the display.  
4 − Press the WAKE key. The WAKE key will flash to show it  
is selected.  
5 − Press the UP and DOWN keys to modify time and heat  
and cool temperatures shown on the screen.  
6 − Press LEAVE key and repeat step 5.  
7 − Press RETURN key and repeat step 5.  
8 − Press SLEEP key and repeat step 5.  
MON  
TUE  
WED  
THU  
FRI  
SAT  
SUN  
OK TO PICK MULTIPLE DAYS  
FAN  
HEAT  
CIRC  
CANCEL  
PERIOD  
AM  
COOL  
DONE  
WAKE  
LEAVE RETURN SLEEP  
CANCEL  
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Program Your Heating and Cooling Schedule (Cont.)  
NOTE − The FAN setting can be programmed for ON, AUTO  
or CIRC for each period selected. See following page for  
more information about fan setting options.  
9 − Press DONE key when finished. Saving changes screen  
appears to indicate that schedule changes are being saved to  
the days selected.  
10 − Repeat steps 1 through 9 to set a program schedule  
for the remaining days of the week. Example: If Mon − Fri  
was selected first, repeat steps 1 through 9 to program Sat  
and Sun.  
NOTE − To exit the schedule without saving changes, press  
CANCEL key at any time.  
MON TUEꢀꢀꢁꢂꢃWEDꢀꢀꢁꢂTHUꢀꢀꢄꢂꢃFRI  
SAVING CHANGES  
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Fan Schedule  
The FAN setting can be programmed for ON, AUTO or  
CIRC for each period selected:  
ON −− Fan runs continuously. Use this setting for improved air  
circulation or for more efficient central air cleaning.  
AUTO −− Fan runs only when heating or cooling system is on.  
CIRC −− Fan runs randomly approximately 35% of the time.  
Use this setting for improved air circulation or for more effi-  
cient central air cleaning when you do not want the fan to run  
continuously.  
Fan Status Display on Home Screen −− If the fan program is  
scheduled, AUTO is displayed as the fan setting, along with  
the particular fan setting that has been programmed. For ex-  
ample, if, during the WAKE period, the Fan has been set to  
AUTO, then AUTO is shown as the fan setting. However, if,  
during the WAKE period, the Fan has been set to ON, both  
AUTO and ON are displayed. AUTO indicates that the fan  
has been scheduled and ON indicates that the fan has been  
scheduled to be ON.  
Manually Override Scheduled Fan Setting −− If the fan set-  
ting is scheduled, press the FAN key, then press the desired  
fan setting to manually override the scheduled fan setting.  
Fan operation will return to the programmed operation when  
the next schedule period begins.  
THU  
FAN  
Inside  
Set To  
ON  
AUTO  
Following  
Schedule  
SYSTEM  
HEAT  
AM  
SCHED  
HOLD  
CLOCK SCREEN  
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Cancel a Schedule Period  
You may wish to cancel a period to match your lifestyle. For  
example, if someone is always home during the day on Tues-  
day, you can cancel the LEAVE and RETURN periods to  
have the thermostat hold the WAKE temperature until the  
SLEEP period is reached.  
1 − Press the SCHED key. The SCHEDULE screen will be  
displayed.  
2 − Press the EDIT key. The screen will change to display the  
days of the week across the top.  
3 − Select the day or days of the week that are affected by  
the schedule change.  
4 − Press the schedule period you want to cancel: WAKE,  
LEAVE, RETURN or SLEEP. Once selected the period will  
flash to show it is selected.  
5 − Press the CANCEL key. The time, temperature(s) and  
fan settings will all dissappear from the screen. The bar  
above the selected period is removed to indicate that the se-  
lected period was cancelled.  
6 − Press DONE key.  
NOTE − A schedule period may be reinstated at any time by  
entering the schedule edit screen, selecting the period and  
pressing the arrow keys to set the desired time and tempera-  
tures.  
SUN  
TUE WED  
THU  
FRI  
SAT  
MON  
OK TO PICK MULTIPLE DAYS  
FAN  
HEAT  
COOL  
DONE  
WAKE  
LEAVE RETURN SLEEP CANCEL  
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Set the Time  
1 − Press the CLOCK key. The current time setting will be  
displayed as shown below.  
2 − Use the arrows to set the correct time.  
3 − Press DONE key.  
IMPORTANT − The current day of the week should be dis-  
played correctly on this screen. If not, refer to the Advanced  
Settings section to correct the day of the week display.  
TUE  
AM  
DONE  
CANCEL  
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Override Temperature Setting −− Temporary Hold  
You may use the temporary hold function to override the pro-  
grammed temperature setting until the next scheduled period  
or until a particular time that you wish.  
1 − Press the UP or DOWN arrow next to the temperature  
display to adjust the temperature as desired.  
NOTE − ꢀHold Temperature Until" appears on the screen. The  
currently programmed start time of the next scheduled period  
also appears, as does an additional set of arrows.  
2 − Use the UP and Down arrows next to the displayed  
time to set the time that you wish for the thermostat to  
resume the schedule.  
NOTE − The time arrows are displayed for approximately  
seven seconds. Press the screen where the hold temperature  
time is shown to allow the arrows to reappear.  
3 − Press CANCEL or SCHED key to cancel temperature  
hold and resume schedule. ꢅFollowing Schedule" appears  
on the screen to indicate that the temporary hold has ended.  
TUE  
FAN  
Inside  
Set To  
AUTO  
SYSTEM  
Hold Temperature  
Until  
HEAT  
PM  
SCHED  
HOLD  
CLOCK  
SCREEN  
CANCEL  
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Override Temperature Setting −− Permanent Hold  
The permanent hold function overrides the programmed tem-  
perature setting until the permanent hold is cancelled.  
1 − Press the HOLD key.  
NOTE − ꢀPermanent Hold" appears on the screen under the  
current time.  
2 − Use the UP and Down to adjust the temperature to the  
setting that you want the thermostat to hold.  
3 − Press CANCEL key to cancel permanent hold and re-  
sume schedule. ꢅFollowing Schedule" appears on the  
screen to indicate that the hold has ended.  
TUE  
FAN  
Inside  
Set To  
AUTO  
SYSTEM  
HEAT  
AM  
Permanent  
Hold  
SCHED  
HOLD  
CLOCK  
SCREEN  
CANCEL  
Page 15  
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Override Temperature Setting −− Vacation Hold  
You may use the vacation hold function to override the pro-  
grammed temperature setting for a designated number of days.  
1 − Press the UP or DOWN arrow next to the temperature  
display to adjust the temperature as desired.  
NOTE − ꢀHold Temperature Until" appears on the screen. The  
currently programmed start time of the next scheduled period  
also appears, as does an additional set of arrows. This is the  
time of day that the override will expire after the hold period ends.  
2 − Press the HOLD key twice. Screen shows ꢅHold Tempera-  
ture Until" one day.  
3 − Press the UP and DOWN arrows to adjust the number of  
days you would like to override the schedule.  
NOTE − The arrows used to adjust the number of days are dis-  
played for approximately seven seconds. Press the screen  
where the number of days are shown to allow the arrows to re-  
appear.  
4 − Press the CANCEL key to cancel the vacation override  
early.  
NOTE − When the programmed vacation hold expires, the  
screen displays ꢀFollowing Schedule" to indicate that the hold  
has ended.  
THU  
FAN  
Inside  
Set To  
AUTO  
SYSTEM  
Hold Temperature  
Until  
HEAT  
DAYS  
SCHED  
CLOCK  
SCREEN  
CANCEL  
Page 16  
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Temperature Recovery Feature  
Your thermostat is equipped with a feature that accommo-  
dates recovery time to ensure your comfort.  
Recovery time is the time that it takes your heating and cool-  
ing equipment to recover from energy−saving settings pro-  
grammed during away or asleep periods. Recovery time  
depends on local weather, your schedule, the contruction of  
your home and your heating and/or cooling equipment.  
Your thermostat tracks the time that it takes for your system  
to reach your desired settings (recovery period). This allows  
the thermostat to accommodate this recovery period and to  
ensure your comfort at the programmed wake and return  
settings.  
For example, your WAKE period is programmed for 6:00  
a.m. and 70°F. The thermostat activates heating in advance  
of 6:00 a.m. to ensure that your desired comfort setting of  
70°F is reached by the time you awake.  
A recovery notice is displayed when the system is operating  
before the scheduled time.  
TUE  
FAN  
Set To  
Inside  
AUTO  
Following  
Schedule  
SYSTEM  
RECOVERY  
HEAT  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
Page 17  
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Clean the Thermostat Screen  
The thermostat screen may be cleaned, if necessary.  
1 − Press the SCREEN key. The thermostat locks the touch  
screen for 30 seconds to allow for cleaning.  
2 − Use a damp cloth slightly moistened with water or  
household glass cleaner to clean the screen.  
IMPORTANT − Do not spray any type of liquid directly onto the  
thermostat. Spray the water or household glass cleaner on a  
cloth, then use the cloth to clean the thermostat screen.  
3 − Repeat the above steps as necessary.  
4 − Press the DONE key to return to the home screen and  
normal operation.  
OK TO  
CLEAN  
SCREEN  
DONE  
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Battery Replacement  
If your thermostat has batteries, a low battery warning flashes  
on the home screen for approximately 30 days.  
IMPORTANT − Batteries should be replaced once per year to  
prevent leakage and to prevent loss of battery back−up in a  
power outtage. You may also wish to replace the batteries prior  
to leaving your home for more than a month.  
1 − When the low battery indicator is flashing, replace the  
batteries promptly with three fresh AAA alkaline batteries.  
2 − Remove the thermostat from the wallplate by pulling  
straight out.  
WALL  
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Battery Replacement (Continued)  
3 − Remove the old batteries and insert three fresh AAA  
alkaline batteries, as marked on the thermostat.  
BACK OF THERMOSTAT  
+
+
+
BATTERIES  
(3)  
4 − Align the terminal screw blocks with the pins on the  
back of the thermostat.  
5 − Push the thermostat straight onto the wallplate until it  
snaps into place.  
WALLPLATE  
PINS ON  
BACK OF  
THERMOSTAT  
TERMINAL  
SCREW  
BLOCK  
Page 20  
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Reminder Timers  
The reminder timers notify you when it is time to change the  
furnace filter, humidifier pad or ultraviolet lamp. When one of  
the set timers expires, a reset key appears on the home screen.  
Reset Timers  
1 − ꢀChange" reminder appears on the screen when the  
timer expires.  
2 − Press the RESET key to restart the timer. If more than  
one timer expires at the same time, press the RESET key until  
all timers have been reset.  
MON  
SUN  
TUE WED  
THU  
FRI  
SAT  
CHANGE FILTER  
Set to  
Inside  
Following  
Schedule  
View or Reset Timer Settings Before They Expire  
1 − Press the MORE key until the timer you want to modify  
appears on the screen.  
2 − Press the EDIT key to change the Timer Reload Value.  
Use the UP or DOWN arrow keys to change the number of run  
time days. See the Advanced Settings section, step 8 through  
10 for more information.  
3 − Press the DONE key to return to the selected timer.  
4 − Press the RESET key to reset the timer to the Timer Re-  
load Value.  
5 − Press the DONE or CANCEL key to return to the home  
screen.  
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Built−In Compressor Protection  
The thermostat provides built−in compressor protection (mini-  
mum−off timer) that prevents the compressor from restarting too  
early after a shutdown.  
The minimum−off timer is activated after the compressor shuts  
off.  
If there is a demand for compressor operation during the delay,  
the thermostat displays the WAIT message.  
When the minimum−off delay expires, COOL ON ( or HEAT ON  
in heat pump applications) is displayed solidly on the screen  
and the compressor and fan are allowed to operate to meet the  
demand.  
TUE  
FAN  
Set to  
Inside  
AUTO  
Wait Cool  
Following  
Schedule  
HEAT  
AM  
PM  
SCHEDꢀꢄꢂꢃHOLDꢀꢄꢂCLOCKꢀꢃSCREENꢀꢁꢂMORE  
Page 22  
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Outdoor Temperature  
If an optional outdoor temperature sensor has been installed  
with your thermostat, the outdoor temperature is displayed in  
the lower right corner of the home screen.  
If the temperature is not displayed and an outdoor temperature  
sensor has been installed, press the MORE key until the out-  
side temperature is displayed.  
TUE  
FAN  
Set To  
Inside  
AUTO  
SYSTEM  
Following  
Schedule  
HEAT  
Outside  
AM  
SCHED  
HOLD  
CLOCK  
SCREEN  
MORE  
Advanced Heat Pump Features (Select Models)  
Some thermostat models, when used in heat pump systems  
which include an optional outdoor temperature sensor, provide  
additional features. In these applications, the compressor and/or  
back−up heat lockout may be based on the outside temperature.  
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Screen Lock  
You can fully or partially lock the keys on the touch screen. See  
the Advanced Settings section for more information on this fea-  
ture. If the thermostat displays a ꢅScreen Locked" message,  
your thermostat screen is either fully or partially locked.  
TUE  
SCREEN LOCKED  
FAN  
Set To  
Inside  
AUTO  
Following  
Schedule  
SYSTEM  
HEAT  
PM  
SCHED  
HOLD  
CLOCK SCREEN MORE  
Partially Locked Screen  
When partially locked, all touch screen keys are locked except  
the temperature up and down arrow keys and the SYSTEM key  
access to the user set−up options. The Screen Locked message  
is displayed for 5 to 7 seconds each time the user attempts to  
press a key that is locked.  
When the screen is partially locked, you will be able to adjust  
the temperature setting up or down; but schedule settings will  
not be accessible. The temporary temperature change lasts  
until the next scheduled period. Refer to Temporary Tempera-  
ture Override section. To cancel the temporary temperature  
override and return to the programmed schedule, press the  
CANCEL key.  
Fully Locked Screen  
When the screen is fully locked, you will still be allowed to ac-  
cess the user set−up options through the SYSTEM key; howev-  
er, all other touch screen keys are locked and are not functional.  
The Screen Locked message is displayed continuously.  
Page 24  
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Advanced Settings  
Your thermostat has many advanced settings that can be used  
to match your desired use of this important tool. These items  
have been set by the installer during the installer set−up pro-  
cess; however, use the following information to customize the  
settings for your use.  
Use the following steps and the User Set−Up table on pages 25  
through 27 to customize your thermostat operation.  
1 − Press and release the SYSTEM key.  
2 − Press and hold the center blank key for approximately five  
seconds, until the screen changes.  
TUE  
CHANGE FILTER UV LAMP HUMIDIFIER PAD  
Set To  
Inside  
Following  
Schedule  
SYSTEM  
EM HEAT  
OFF  
PM  
CANCEL  
3 − Release the key when the thermostat display matches the  
display below.  
DONE  
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Advanced Settings (Continued)  
4 − Refer to the figure below to see how the thermostat buttons are  
used to make selections.  
5− Refer to the table on the following pages to make proper set−up  
choices for your application.  
6 − When all set−up selections have been made, press the DONE  
key to save your settings. The thermostat display will return to  
the main screen.  
ADVANCE TO NEXT  
USER SET−UP  
USER  
SET−UP  
NUMBER  
CURRENT  
SETTING  
DONE  
CHANGE THE  
CURRENT  
SETTING  
PRESS TO EXIT  
INSTALLER SET−UP  
RETURN TO PREVIOUS  
USER SET−UP  
Page 26  
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Advanced Settings (Continued)  
User  
Set−Up  
Number  
Set−Up  
Name  
Selection Description  
Date  
(Year/  
first)  
Select first two digits of current calen-  
dar year (20 for 2005, etc.)  
0120  
0130  
Date  
(Year/  
last)  
Select last two digits of current calen-  
dar year (05 for 2005, etc.)  
Options: 01 to 99 available.  
Select number that represents current  
calendar month. Options 1 through 12.  
Date  
(Month)  
0140  
0150  
Select number that represents current  
calendar date. Options 1 through 31.  
Date  
(Day)  
Select the type of scheduling that will  
be used.  
Schedule Options:  
0160  
0320  
0330  
Options 0 − non−programmable thermostat;  
4 − fully programmable thermostat  
with 7−day scheduling.  
Temp.  
Display used.  
Scale Options: 0 −− Fahrenheit; 1 − Celsius.  
Select the temperature display to be  
Options: 0 − Off. Thermostat time is  
not automatically adjusted for Daylight  
Daylight Savings in the Fall and Spring;  
Savings 1 − On. Thermostat time is automati-  
cally adjusted for Daylight Savings in  
the Fall and Spring;  
Page 27  
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Advanced Settings (Continued)  
User  
Set−Up  
Number  
Set−Up  
Name  
Selection Description  
Select option for filter change  
reminder timer. Options:  
0 − Reminder is off;  
Filter  
1 − 10 run time days;  
0500  
Change 2 − 30 run time days;  
Reminder 3 − 60 run time days;  
4 − 90 run time days;  
5 − 120 run time days;  
6 − 365 run time days.  
Select option for humidifier pad re-  
Humidifier  
Pad  
Replace-  
ment  
Reminder  
placement reminder timer. Options:  
0 − Reminder is off;  
1 − 90 run time days;  
2 − 180 run time days;  
3 − 365 run time days.  
0510  
0520  
UV Lamp Select option for UV lamp replace-  
Replace- ment reminder timer. Options:  
ment 0 − Reminder is off;  
Reminder 1 − 365 run time days.  
Select option for number of schedul-  
Number ing periods. Options:  
0540  
0640  
of  
2 − Two periods (wake and sleep);  
Periods 4 − Four periods (wake, leave, return,  
sleep).  
Select clock format. Options:  
12 − 12−hour clock;  
24 − 24−hour clock.  
Clock  
Format  
Page 28  
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Advanced Settings (Continued)  
User  
Set−Up  
Number  
Set−Up  
Name  
Selection Description  
Select screen lockout. Options:  
0 − All keys are functional. Screen is  
unlocked;  
1 − Screen partially locked −− only  
temp. up and down keys and ability to  
enter installer set−up mode and  
modify set−up selections are enabled;  
Screen  
Lock−Out  
0670  
2 − Screen fully locked −− only ability to  
enter installer set−up mode and  
modify set−up selections are enabled.  
Page 29  
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Troubleshooting Tips  
If . . .  
Then . . .  
Key to the right of  
the screen key is  
blank.  
MORE key remains blank unless the Fur-  
nace Filter Change Reminder has been  
turned on. See User Set−Up Number 0500.  
Display is blank.  
Check that fresh AAA alkaline batteries are  
installed as marked on the thermostat.  
Temperature set-  
tings do not change.  
Check that temperature settings are:  
Heating 40°F to 90°F (4.5°C to 32°C).  
Cooling 50°F to 99°F (10°C to 37°C).  
Heating system  
does not turn on.  
Set the system to heat by pressing the  
SYSTEM key.  
Check the heat temperature setting to be  
sure it is set above the room temperature  
and ꢅHeat On" is displayed solidly on the  
screen.  
Check the circuit breaker to make sure it  
is not tripped.  
Check the power switch at the heating  
and/or cooling system to make sure it is on.  
Check the furnace door to make sure it  
is closed securely.  
Wait five minutes for the heating system  
to respond.  
If the problem has not been identified  
and corrected, contact a qualified service  
technician.  
Page 30  
href="
Troubleshooting Tips (Continued)  
If . . .  
Then . . .  
Set the system to Cool by pressing the  
SYSTEM key.  
Cooling system  
does not turn on.  
Check the cool temperature setting to be  
sure it is set below the room temperature  
and ꢅCool On" is displayed solidly on the  
screen.  
Check the circuit breaker to make sure it  
is not tripped.  
Check the power switch at the heating  
and/or cooling system to make sure it is on.  
Check the furnace door to make sure it  
is closed securely.  
Wait five minutes for the cooling system  
to respond.  
If the problem has not been identified  
and corrected, contact a qualified service  
technician.  
Cannot set System  
setting to Cool.  
Check Installer Set−Up Number 170: Heating  
and/or Cooling Type*. Make sure the setting  
matches the installed heating and/or cooling  
system.  
"Heat On" is not dis- Set the System setting to Heat and set the  
played on the  
screen.  
temperature setting above the room temper-  
ature. If ꢅHeat On" is shown solidly in the  
display, but the heating system does not turn  
on, see ꢅHeating system does not turn on"  
suggestions on the previous page.  
"Cool On" is not dis- Set the System setting to Cool and set the  
played on the  
screen.  
temperature setting below the room temper-  
ature. If ꢅCool On" is shown solidly in the  
display, but the cooling system does not turn  
on, see ꢅCooling system does not turn on"  
suggestions at the top of this page.  
*Refer to Installation Instructions for access to Installer Set−Up pro-  
cedures.  
Page 31  
href="
Troubleshooting Tips (Continued)  
If . . .  
Then . . .  
ꢅWait" is displayed  
on the screen.  
Compressor minimum−off timer is activated.  
Wait up to five minutes for the compressor  
to turn on.  
Fan does not turn on Check Installer Set−Up 0180: Fan Control in  
in a call for heat  
(electric furnaces  
only)  
Heating*. Make sure Electric Heat option is  
selected.  
Both heating and Check Installer Set−Up Number 170: Heating  
cooling systems are and/or Cooling Type*. Make sure the setting  
operating at the  
same time.  
matches the installed heating and/or cooling  
system.  
Check to ensure that bare portions of wires  
are not touching.  
Heating is running in Check Installer Set−Up Number 170: Heating  
Cool mode.  
and/or Cooling Type*. Make sure the setting  
matches the installed heating and/or cooling  
system.  
Heating system Check Installer Set−Up Number 170: Heating  
does not turn off and and/or Cooling Type*. Make sure the setting  
the heat tempera-  
ture setting is set  
below the room tem-  
perature ("Heat On"  
is not shown in dis-  
play.)  
matches the installed heating and/or cooling  
system.  
Red LED is lit in the A system monitor is wired to the thermostat  
upper right corner of L terminal. Refer to suggestions given in  
the thermostat when Heating or Cooling System Does Not Turn  
the system monitor  
detects a possible  
problem.  
On sections in this table.  
*Refer to Installation Instructions for access to Installer Set−Up pro-  
cedures.  
Page 32  

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