White Rodgers Thermostat 1F80 361 User Manual

1F80-361  
ProgrammableElectronicDigitalThermostat  
INSTALLATION AND  
OPERATIONINSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFOREINSTALLINGOROPERATINGTHISCONTROLCOULDCAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
• Temperature override until next program period  
• Manual program override (HOLD temperature)  
• Temporary HOLD  
Your new White-Rodgers 5-Day/1-Day/1-Day Digital Thermo-  
stat uses the technology of a solid-state microcomputer to  
provide precise time/temperature control. This thermostat offers  
you the flexibility to design heating and cooling programs that fit  
your needs.  
• °F/°C convertibility  
• Temperature range 45° to 90°F  
• RC, RH, C, W, Y, G , O and B terminals  
• Optional C terminal (Dual Power option)  
Features:  
• Separate 5-day (weekday), 1-day (Sat) and 1-day (Sun) pro-  
gramming with four separate time/temperature periods per day  
• Simultaneous heat and cool program storage  
• B and O terminals for single stage heat pumps (no auxiliary  
heat) or damper operation  
• Preprogrammed temperature control  
• Backlit display  
• Program storage in case of power loss  
• 2 “AA” Energizer® alkaline batteries included  
• LCD continuously displays setpoint, and alternately dis-  
plays time and room temperature  
PRECAUTIONS  
This thermostat is intended for use with a low voltage system; do  
not use this thermostat with a line voltage system. If in doubt  
about whether your wiring is millivolt, line, or low voltage, have  
it inspected by a qualified heating and air conditioning contractor  
or electrician.  
! WARNING  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
Do not exceed the specification ratings.  
Do not short out terminals on gas valve or primary  
control to test. Short or incorrect wiring will damage  
thermostat and could cause personal injury and/or  
property damage.  
Allwiringmustconformtolocalandnationalelectricalcodesand  
ordinances.  
This control is a precision instrument, and should be handled  
carefully. Rough handling or distorting components could cause  
the control to malfunction.  
Thermostat installation and all components of the  
system shall conform to Class II circuits per the NEC  
code.  
! CAUTION  
To prevent electrical shock and/or equipment damage,  
disconnect electric power to system at main fuse or  
circuit breaker box until installation is complete.  
SPECIFICATIONS  
ELECTRICAL DATA  
APPLICATIONS  
Electrical Rating:  
For use with:  
8 to 30 VAC 50/60 Hz. or D.C.  
0.05 to 1.0 Amps (Load per terminal)  
1.5 Amps Maximum Total Load (All terminals combined)  
• Standard heat/cool or heat only systems  
• Electric heat systems  
• Gas or oil fired systems  
• Gas systems with intermittent ignition devices (I.I.D.)  
and/or vent dampers  
• Hydronic (hot water or steam) systems  
• Single-stage heat pump systems (no auxiliary heat)  
• Millivolt systems  
THERMAL DATA  
Setpoint Temperature Range:  
45°F to 90°F (7°C to 32°C)  
Operating Ambient Temperature Range:  
32°F to 105°F  
Operating Humidity Range:  
0 to 90% RH (non-condensing)  
Shipping Temperature Range:  
-4°F to 149°F  
DO NOT USE WITH:  
• Multi-stage systems  
• Systems exceeding 30 VAC and 1.5 amps  
• 3-wire zoned hydronic heating systems  
PART NO. 37-6621B  
White-Rodgers is a division  
of Emerson Electric Co.  
Replaces 37-6621A  
0512  
 
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Hot  
Y
C
B
O
G
W
RC  
RH  
THERMOSTAT  
SYSTEM  
C
Y
B
O
G
W
RC  
RH  
Cooling  
System Relay System  
Fan  
Heating  
24 VAC  
120 VAC  
Neutral  
Fan  
Relay  
Heating  
System  
Hot  
HEATING  
TRANSFORMER  
24 VAC  
120 VAC  
Neutral  
NOTE  
For 2-wire Heat only,  
attach to RH and W  
Hot  
TRANSFORMER  
24 VAC  
120 VAC  
Neutral  
Figure 2. Typical wiring diagram for  
heat only, 3-wire, single transformer systems  
COOLING TRANSFORMER  
Figure 5. Typical wiring diagram for  
heat/cool, 5-wire, two-transformer systems  
JUMPER  
WIRE  
THERMOSTAT  
C
B
O
Y
G
W
RC  
RH  
SYSTEM  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Cooling  
System Relay  
Fan  
Y
C
B
O
G
W
RC RH  
Hot  
24 VAC  
120 VAC  
Neutral  
Reversing Compressor Fan  
Valve*  
Contactor Relay  
Hot  
TRANSFORMER  
24 VAC  
120 VAC  
Neutral  
Figure 3. Typical wiring diagram for  
cool only, 3-wire, single transformer systems  
* Reversing valve is energized when the  
system switch is in the COOL position  
TRANSFORMER  
Figure 6. Typical wiring diagram for heat pump  
with reversing valve energized in COOL  
NOTE  
RED jumper wire (provided with thermostat) must be  
connected between thermostat RH and RC terminals  
for proper thermostat operation with this system.  
JUMPER  
WIRE  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Y
C
B
O
G
W
RC RH  
THERMOSTAT  
SYSTEM  
C
B
O
Y
G
W
RC RH  
Cooling  
System Relay  
Fan  
Heating  
System  
Reversing Compressor Fan  
Valve*  
Contactor Relay  
Hot  
Hot  
24 VAC  
120 VAC  
Neutral  
24 VAC  
120 VAC  
Neutral  
* Reversing valve is energized when the  
system switch is in the HEAT position  
TRANSFORMER  
TRANSFORMER  
Figure 7. Typical wiring diagram for heat pump  
with reversing valve energized in HEAT  
Figure 4. Typical wiring diagram for  
heat/cool, 4-wire, single transformer systems  
The24VoltneutralconnectiontoterminalConthethermostatisnotrequiredifthebatteriesarereplacedonceayear  
with fresh "AA" Energizer® alkaline batteries.  
Cooling System  
Heating System  
! CAUTION  
To prevent compressor and/or property damage, if the  
outdoor temperature is below 50°F, DO NOT operate  
the cooling system.  
1. Move SYSTEM switch to HEAT position. If the heating  
system has a standing pilot, be sure to light it.  
2. Press  
toadjustthermostatsettingaboveroomtempera-  
ture. The heating system should begin to operate.  
1. Move SYSTEM switch to COOL position.  
3. Press  
to adjust temperature setting below room tem-  
2. Press  
toadjustthermostatsettingbelowroomtempera-  
perature. The heating system should stop operating.  
ture. The blower should come on immediately on high  
speed, followed by cold air circulation  
3. Press  
to adjust temperature setting above room tem-  
perature. The cooling system should stop operating.  
3
 
OPERATION  
Before you begin programming your thermostat, you should be  
familiar with its features and with the display and the location  
and operation of the thermostat buttons. Your thermostat con-  
sists of two parts: the thermostat cover and the base. To  
remove the cover, pull it straight out from the base. To replace  
the cover, line up the cover with the base and press until the  
cover snaps onto the base.  
The Thermostat Buttons and Switches  
1
Raises temperature setting.  
Lowers temperature setting.  
TIME button.  
2
3
4
5
6
7
PRGM (program) button.  
RUN (run program) button.  
HOLD temperature button.  
FAN switch (ON, AUTO).  
SYSTEM switch (COOL, OFF, HEAT).  
8
The Display  
Press HOLD to change to the next menu item or press TIME to  
gobackwardstothepreviousiteminthemenu. Toexitthemenu  
and return to the program operation, press RUN. If no keys are  
pressed within fifteen minutes, the thermostat will revert to  
normal operation.  
9
Indicates day of the week.  
Flame icon ( ) is displayed when the SYSTEM switch is in  
the HEAT position. Snowflake icon ( )is displayed (non-  
flashing)whentheSYSTEMswitchisintheCOOLposition.  
Snowflake is displayed (flashing) if the thermostat is in  
lockout mode to prevent the compressor from cycling too  
quickly.  
10  
1) Select Temporary Hold Time-Thethermostatcanholdany  
temperature you set it to for the amount of time you select on  
this option. Your choices are 0:00 to 8:00 hours in 15 minute  
increments. 0:00 disables the function  
11  
Displays “BATT” when the 2 "AA" batteries are low and  
should be replaced. Only “BATT” and “LO” in the minutes  
field are displayed when batteries are low with no system  
power.  
Example:  
1. You have selected 3:00 hours for the Temporary Hold  
time period.  
Alternately displays current time and temperature. Dis-  
plays “LO” in the minutes field when batteries are low.  
12  
13  
2. With the thermostat set to Heat or Cool, press HOLD for  
approximately five seconds until HOLD time (3:00  
indicating 3 hours) appears as a setting reminder.  
ThewordHOLDisdisplayedwhenthethermostatisinthe  
HOLD mode. “HOLD” is displayed flashing when the  
thermostat is in a temporary HOLD Mode.  
3. After releasing the button, “HOLD” on the display will  
blink.  
14  
15  
Displays currently programmed set temperature (this is  
blank when SYSTEM switch is in the OFF position).  
4. Use  
or  
to set the temperature to your prefer-  
ence. The thermostat will maintain this temperature  
setting for 3 hours with “HOLD” blinking to remind you  
it is in Temporary Hold. After 3 hours the thermostat will  
go back to the program temperature and “HOLD” will no  
longer blink or display.  
Displays “FLTR” when the system has run for the pro-  
grammedfiltertimeperiodasaremindertochangeorclean  
your air filter.  
CONFIGURATIONMENU  
2) Select FA or SL (Fast or Slow) Heating Cycle Rate - The  
FA setting is frequently used for gas, oil or electric heat. The  
SL setting produces a longer heating cycle which is nor-  
mally for hot water or steam (hydronic) systems. Both  
settings produce very accurate temperature control and  
can be set to your personal preference. FA cycles the  
system just under 1°F and the SL setting cycles at approxi-  
mately 1.5°F.  
The configuration menu allows you to set certain thermostat  
operating characteristics to your system or personal require-  
ments.  
Press RUN to make sure the thermostat is in the run program  
mode, then press PRGM and RUN at the same time to enter the  
configuration menu. The display will show the first item in the  
configuration menu.  
The configuration menu table summarizes the configuration  
options. An explanation of each option follows.  
3) Select backlit display - The display backlight improves  
display contrast in low lighting conditions. Selecting back-  
light ON will keep the light on for a short period of time after  
any key is pressed. Selecting OFF will keep the light off.  
4
 
Configuration Menu  
Step  
Press Button(s)  
Displayed (Factory Default) Press  
or  
to select:  
COMMENTS  
Select temporary Hold time  
1
HOLD  
(0:00)  
0 to 8 hrs (in  
PRGM  
and RUN  
15 minute increments)  
Select FA or SL (Fast or Slow) heating cycle rate  
SL  
2
3
4
5
6
HOLD  
*
(FA)  
d-L  
(ON)  
OFF  
OFF  
Select display backlight OFF or ON  
HOLD  
*
*
E
(ON)  
Select Energy Management Recovery OFF or ON  
HOLD  
Filter  
(000)  
0 to 1950 hours  
(in 50 hour increments)  
HOLD  
HOLD  
HOLD  
*
*
*
Select filter replacement run time  
LOC  
(OFF)  
ON  
Select compressor lockout OFF or ON  
Select temperature display adjustment higher or lower  
0 HI  
(0)  
4 LO to  
4 HI  
7
8
9
Select temperature display to F or C  
Returns to normal operation  
(F)  
C
HOLD  
RUN  
*
* Press HOLD to advance to next item or TIME to move backwards to previous item  
4)  
                           
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y
                                                  
                                                      
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y
                                                                                            
                                                                                                
O
                                                                                                
                                                                                                   
F
                                                                                                   
                                                                                                     
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o
                                                                                                          
                                                                                                            
r
                                                                                                            
                                                                                                               
O
                                                                                                               
                                                                                                                  
N
                                                                                                                  
-
OPERATINGFEATURES  
Now that you are familiar with the thermostat buttons and  
display, read the following information to learn about the many  
features of the thermostat.  
Energy Management Recovery (EMR) causes the thermo-  
stat to start heating or cooling early to make the building  
temperature reach the program setpoint at the time you  
specify. Heating will start 5 minutes early for every 1° of  
temperature required to reach setpoint.  
• SIMULTANEOUS HEATING/COOLING PROGRAM  
STORAGE — When programming, you can enter both  
your heating and cooling programs at the same time. There  
is no need to reprogram the thermostat at the beginning of  
each season.  
Example: You select EMR and have your heating pro-  
grammed to 65° at night and 70° at 7 AM. If the building  
temperature is 65° the difference between 65° and 70° is  
5°. Allowing 5 minutes per degree the thermostat setpoint  
will change to 70° at 6:35 AM. Cooling allows more time per  
degree because it takes longer to reach temperature.  
• TEMPERATURE OVERRIDEPress  
or  
untilthe  
display shows the temperature you want. The thermostat  
will override current programming and keep the room  
temperature at the selected temperature until the next  
program period begins. Then the thermostat will automati-  
cally revert to the program.  
5) Select filter replacement run time - The thermostat will  
display “FLTR” after a set time of operation. This is a  
reminder to change or clean your air filter. This time can be  
set from 0 to 1950 hours in 50 hour increments. A selection  
of 000 will cancel this feature. When “FLTR” is displayed,  
you can clear it by pressing HOLD and RUN at the same  
time. This resets the timer and starts counting the hours  
until the next filter change. Changing the time in the menu  
also resets the timer.  
• HOLD TEMPERATURE — The thermostat can hold any  
temperature within its range for an indefinite period without  
reverting to the programmed temperature. Momentarily  
pressHOLDbutton.HOLDwillbedisplayed.Thenchoose  
the desired temperature by pressing  
or  
. The  
thermostat will hold the room temperature at the selected  
setting until you press RUN button to start program opera-  
tion again.  
6) Select Compressor Lockout LOC OFF or ON - Selecting  
LOC ON will cause the thermostat to wait 5 minutes before  
turning on the compressor if the heating and cooling sys-  
tem loses power. It will also wait 5 minutes minimum  
between cooling cycles. This is intended to help protect the  
compressor from short cycling. Some newer compressors  
already have a time delay built in and do not require this  
feature. Your compressor manufacturer can tell you if the  
feature is already present in their system. When the  
compressor time delay occurs it will flash the (snowflake  
icon) for about five minutes then turn on the compressor.  
• CONFIGURATION MENU — Allows you to customize  
certain thermostat options.  
PROGRAMMINGYOURTHERMOSTAT  
This section will help you plan your thermostat’s program to  
meet your needs. For maximum comfort and efficiency, keep  
the following guidelines in mind when planning your program.  
• When heating (cooling) your building, program the  
temperatures to be cooler (warmer) when the building is  
vacant or during periods of low activity.  
7) Select Temperature Display Adjustment 4 LO to 4 HI -  
Allows you to adjust the room temperature display 4° higher  
or lower. Your thermostat was accurately calibrated at the  
factory but you have the option to change the display  
temperature to match your previous thermostat.  
• During early morning hours, the need for cooling is  
usually minimal.  
8) Select F° or C° Readout - Changes the display readout to  
Centigrade or Fahrenheit as required.  
5
 
Enter Heating Program  
Planning Your Program  
1. Move the SYSTEM switch to HEAT.  
Look at the factory preprogrammed times and temperatures  
shown in the sample schedule. If this program will suit your  
needs, simply press the RUN button to begin running the factory  
preset program.  
2. Press PRGM once. “MO TU WE TH FR” (indicating week-  
day program) will appear in the display. Also displayed are  
the currently programmed start time for the 1st heating  
period and the currently programmed temperature (flash-  
ing).  
If you want to change the preprogrammed times and tempera-  
tures, follow these steps.  
MO TU WE TH FR  
Determine the time periods and temperatures for your weekday  
and weekend programs. You must program four periods for  
both the weekday and weekend program. However, you may  
use the same heating and cooling temperatures for consecutive  
time periods. You can choose start times, heating tempera-  
tures, and cooling temperatures independently for both week-  
day and weekend programs (for example, you may select 5:00  
AM and 70° as the weekday 1st period heating start time and  
temperature, and also choose 7:00 AM and 76° as the weekday  
1st period cooling start time and temperature).  
AM  
EXAMPLE:  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 68° is the programmed  
temperature(thisexamplereflectsfactorypreprogramming).  
3. Press  
or  
to change the displayed temperature to  
your selected temperature for the 1st heating program  
period.  
4. Press TIME once (the programmed time will flash). Press  
Use the following table to plan your program time periods and  
the temperatures you want during each period. Fill in the  
complete table to have a record of your programs.  
or  
until your selected time appears. The time will  
change in 15 minute increments. When your selected time  
is displayed, press TIME again to return to the change  
temperature mode.  
Entering Your Program  
5. Press PRGM once. The currently programmed start time  
and setpoint temperature for the 2nd heating program  
period will appear.  
Follow these steps to enter the heating and cooling programs  
you have selected.  
6. Repeat steps 3 and 4 to select the start time and heating  
temperature for the 2nd heating program period.  
Set Current Time and Day  
1. PressTIMEbuttononce. Thedisplaywillshowthehouronly.  
7. Repeat steps 3 through 5 for the 3rd and 4th heating  
program periods. Weekday heating programs are now com-  
plete.  
PM  
EXAMPLE:  
8. Press PRGM once. “SA” (indicating Saturday program) will  
appear in the display, along with the start time for the 1st  
heating period and the currently programmed temperature.  
2. Press and hold either  
or  
until you reach the correct  
hour and AM/PM designation (AM begins at midnight; PM  
begins at noon).  
9. Repeat steps 3 through 7 to complete Saturday heating  
programming.  
3. Press TIME once. The display window will show the minutes  
only.  
10.Press PRGM once. “SU” (indicating Sunday program) will  
appear in the display, along with the start time for the 1st  
heating period and the currently programmed temperature.  
EXAMPLE:  
11.Repeat steps 3 through 7 to complete Sunday heating  
programming.  
4. Press and hold either  
minutes.  
or  
until you reach the correct  
12.When you have completed entering your heating program,  
press RUN.  
5. Press TIME once. The display will show the day of the week.  
6. Press or untilyoureachthecurrentdayoftheweek.  
7. Press RUN once. The display will show the correct time and  
room temperature alternately.  
SAMPLE  
Heating/Cooling Schedule Plan (Factory Program)  
Heating/Cooling Schedule Plan  
SATURDAY (1 DAY)  
SUNDAY (1 DAY)  
WEEKDAY (5 DAY)  
SATURDAY (1 DAY)  
SUNDAY (1 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Period  
1ST  
Temperature  
70˚F  
Temperature  
70˚F  
Temperature  
70˚F  
Period  
1ST  
Temperature  
Temperature  
Temperature  
6:00 AM  
6:00 AM  
6:00 AM  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
6
 
!
                                                        
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Enter Cooling Program  
CHECKYOURPROGRAMMING  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
If the outside temperature is below 50°F, disconnect  
power to the cooling system before programming.  
Energizing the air conditioner compressor during  
cold weather may cause personal injury or property  
damage.  
1. Move SYSTEM switch to HEAT position.  
2. Press PRGM to view the 1st weekday heating period time  
and temperature. Each time you press PRGM, the next  
heating period time and temperature will be displayed in  
sequence for weekday, then weekend program periods (you  
may change any time or temperature during this procedure).  
1. Move SYSTEM switch to COOL position.  
3. Press RUN.  
2. Follow the procedure for entering your cooling program,  
using your selected cooling times and temperatures.  
4. Move SYSTEM switch to COOL position.  
5. Repeat step 2 to check cooling program.  
6. Move SYSTEM switch to HEAT or COOL and press RUN to  
begin program operation.  
YOURTHERMOSTATISNOWCOMPLETELYPROGRAMMEDAND  
READY TO PROVIDE MAXIMUM COMFORT AND EFFICIENCY!  
TROUBLESHOOTING  
Reset Operation  
program. If the thermostat has power, has been reset and still  
If a voltage spike or static discharge blanks out the display or does not function correctly contact your heating/cooling ser-  
causes erratic thermostat operation you can reset the thermo- vice person or place of purchase.  
stat by pressing  
,
and TIME at the same time. This also  
Batteries  
resets the factory defaults to the configuration menu and For optimum performance, we recommend replacing batteries  
once a year with fresh "AA" Energizer® alkaline batteries.  
Symptom  
Possible Cause  
Corrective Action  
No Heat/No Cool/No Fan  
(commonproblems)  
1. Blown fuse or tripped circuit breaker.  
2. Furnace power switch to OFF.  
3. Furnace blower compartment door or  
panel loose or not properly installed.  
1. Pilot light not lit.  
Replace fuse or reset breaker.  
Turnswitch to ON.  
Replace door panel in proper position to engage  
safety interlock or door switch.  
Re-light pilot.  
No Heat  
2. SYSTEMSwitchnotsetto HEAT.  
Set SYSTEM Switch to Heat and raise setpoint  
aboveroomtemperature.  
3. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
4. Furnace Lock-Out Condition. Heat may also  
be intermittent.  
Many furnaces have safety devices that shut the  
system down when a lock-out condition occurs.  
If the heat works intermittently contact the furnace  
manufacturer or local service person for assistance.  
Diagonistic:Set SYSTEM Switch toHEAT and raise  
the setpoint above room temperature. Within a few  
seconds the thermostat should make a soft click  
sound. This sound usually indicates the thermostat  
is operating properly. If the thermostat does not  
click, try the reset operation listed above. If the  
thermostat does not click after being reset contact  
your heating and cooling service person or place  
of purchase for a replacement. If the thermostat  
clicks, contact the furnace manufacturer or a  
service person to verify the heating system is  
operating correctly.  
5. Heating System requires service or  
thermostat requires replacement.  
NoCool  
1. SYSTEMSwitchnotsettoCOOL  
SetSYSTEMSwitchtoCOOLandlowersetpoint  
belowroomtemperature.  
2. Looseconnectiontothermostatorsystem.  
Verifythermostatandsystemwiresaresecurely  
attached.  
3. Cooling System requires service or thermostat  
requiresreplacement.  
Same procedure as diagnostic for No Heat  
conditionexceptsetthethermostattoCOOLand  
lower the setpoint below the room temperature.  
There may be up to a five minute delay before  
the thermostat clicks in Cooling if the compressor  
lock-out option is selected in the configuration  
menu (Item 6).  
7
 
TROUBLESHOOTING  
Symptom  
Possible Cause  
Corrective Action  
Heat,CoolorFanRunsConstantly.  
1. FANSwitchsettoFanON.  
2. Possibleshortinwiring.  
3. Possibleshortinthermostat.  
4. PossibleshortinHeat/Cool/Fansystem.  
Checkeachwireconnectiontoverifytheyare  
notshortedortouchingtogether.Nobarewire  
shouldstickoutfromunderterminalscrews.  
Tryresettingthethermostat.Ifthecondition  
persists the manufacturer of your system  
or service person can instruct you on how  
to test the Heat/Cool system for correct  
operation. If the system operates correctly,  
replace the thermostat.  
FurnaceCyclesTooFastorTooSllooww  
(narroworwidetemperatureswing)  
1. Thelocationofthethermostatand/orthesize  
oftheHeatingSystemmaybeinfluencingthe  
cycle rate.  
Item2intheConfigurationMenuistheadjustment  
thatcontrolsthecyclerate.Ifanacceptablecycle  
rate is not achieved using the FA (Fast) or SL  
(Slow) adjustment contact a local service person for  
additional suggestions.  
CoolingCyclesTooFastorTooSlow  
(narroworwidetemperatureswwiinngg))  
1. Thelocationofthethermostatand/orthesize  
oftheCoolingSystemmaybeinfluencingthe  
cyclerate.  
Thecyclerateforcoolingisfixedandcannotbe  
adjusted.Contactalocalservicepersonfor  
suggestions.  
ThermostatSettingandThermometer  
Disagree  
1. Thermostatthermometersettingrequires  
adjustment.  
Thethermometercanbeadjusted+/-4degreesas  
listedinitem7oftheConfigurationMenu.Noother  
adjustment is possible.  
Clock Loses or Gains Time  
1. Loss of power to thermostat and low batteries.  
The thermostat will maintain its program in memory  
even with no power/no batteries but the clock time  
will be incorrect when power is restored. See No  
Heat/No Cool/No Fan (common problems) above  
for items to check in the system.  
HeatorCoolStartsEarly  
1. EMRactivated  
SeeConfigurationMenu(Item4).  
ThermostatDoesNotFollowProgram  
1. AMorPMsetincorrectlyinprogram.  
2. AM or PM set incorrectly on the clock.  
3. Voltage spike or static discharge.  
Checkcurrentclockandprogramsettingsincluding  
the AM or PM designations for each time period.  
If a voltage spike or static discharge occurs use the  
Reset Operation listed above.  
BlankDisplayand/orKeypadNot  
Responding  
1. Lossofpoweranddeadbatteries.  
2. VoltageSpikeorStaticDischarge.  
Replacebatteriesandcheckheat/coolsystemfor  
properoperation.Ifavoltagespikeorstaticdischarge  
occurs use the Reset Operation listed above.  
The Emerson logo is a  
trademark and a service mark  
of Emerson Electric Co.  
 

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