White Rodgers 1F80 224 Thermostat User Manual

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1F80-224  
Programmable Electronic Digital Thermostat  
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 24-Hour Digital Thermostat uses the  
technology of a solid-state microcomputer to provide precise  
time/temperature control. This thermostat offers you the flexibil-  
ity to design heating and cooling programs that fit your needs.  
• °F/°C convertibility  
Features:  
• Temperature range 45° to 90°F  
• RC, RH, W, Y, G , O and B terminals  
• Simultaneous heat and cool program storage  
• Preprogrammed temperature control  
• Four separate time/temperature settings  
• B and O terminals for single stage heat pumps (no auxiliary  
heat) or damper operation  
• Program storage in case of power loss  
• 2 “AA” Energizer® alkaline batteries included  
• LCD continuously displays setpoint, and alternately  
displays 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 150°F  
DO NOT USE WITH:  
• Multi-stage systems  
• Systems exceeding 30 VAC and 1.5 amps  
• 3-wire zoned hydronic heating systems  
WHITE-RODGERS  
PART NO. 37-6350C  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
Printed in U.S.A.  
Replaces 37-6350B  
0326  
ST. LOUIS, MISSOURI 63123-5398  
www.white-rodgers.com  
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INSTALLATION  
REMOVE OLD THERMOSTAT  
Screw anchors  
1. Shut off electricity at the main fuse box until installation is  
complete. Ensure that electrical power is disconnected.  
2. Remove the front cover of the old thermostat. With wires  
still attached, remove wall plate from the wall. If the old  
thermostat has a wall mounting plate, remove the thermo-  
stat and the wall mounting plate as an assembly.  
3. Identify each wire attached to the old thermostat using  
the labels enclosed with the new thermostat.  
4. Disconnect the wires from old thermostat one at a time. DO  
NOT LET WIRES FALL BACK INTO THE WALL.  
5. Install new thermostat using the following procedures.  
Mounting  
holes  
ATTENTION!  
Electric/Gas  
switch  
This product does not contain mercury. However, this product  
may replace a unit which contains mercury.  
Mounting  
holes  
Do not open mercury cells. If a cell becomes damaged, do not  
touch any spilled mercury. Wearing nonabsorbent gloves, take  
upthespilledmercurywithsandorotherabsorbentmaterialand  
place into a container which can be sealed. If a cell becomes  
damaged, the unit should be discarded.  
Figure 1. Thermostat Base  
6. Push excess wire into wall and plug hole with a fire-resistant  
material (such as fiberglass insulation) to prevent drafts  
from affecting thermostat operation.  
Mercury must not be discarded in household trash. When the  
unit this product is replacing is to be discarded, place in a  
suitablecontainerandreturntoWhite-Rodgersat2895Harrison  
Street, Batesville, AR 72501-2117 for proper disposal.  
BATTERY LOCATION  
ELECTRIC HEAT OR SINGLE-STAGE  
HEAT PUMP SYSTEMS  
2 "AA" alkaline batteries are included in the thermostat at the  
factory with a battery tag to prevent power drainage. You must  
remove the battery tag to engage the batteries.  
This thermostat is configured from the factory to operate a heat/  
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured  
correctly for any system that DOES NOT require the thermostat  
to energize the fan on a call for heat. If your system is an electric  
heat or heat-pump system that REQUIRES the thermostat to  
turn on the fan on a call for heat, locate the GAS/ELECTRIC  
switch on the back of the thermostat (see fig. 1) and switch it to  
the ELECTRIC position. This will allow the thermostat to ener-  
gize the fan immediately on a call for heat. If you are unsure if  
the heating/cooling system requires the thermostat to control  
the fan, contact a qualified heating and air conditioning service  
person.  
If BATT is displayed, the batteries are low and should be  
replaced with fresh "AA" Energizer® alkaline batteries. To  
replace batteries, install the batteries along the top of the base  
(see Fig. 1). The batteries must be installed with the positive (+)  
end to the left.  
HYDRONIC (HOT WATER OR STEAM)  
HEATINGSYSTEMS  
This thermostat is set to operate properly with a forced-air  
heating system. If you have a hydronic heating system (a  
system that heats with hot water or steam), you must set the  
thermostat to operate properly with your system. Change the  
second option in the configuration menu to SL (see CONFIGU-  
ATTACH THERMOSTAT BASE TO WALL  
1. Remove the packing material from the thermostat. Gently RATION MENU, page 4).  
pull the cover straight off the base. Forcing or prying on the  
thermostatwillcausedamagetotheunit. Ifnecessary, move  
the electric heat switch (see ELECTRIC HEAT SYSTEMS,  
above).  
CHECKTHERMOSTATOPERATION  
If at any time during testing your system does not operate  
properly, contact a qualified service person.  
2. Connect wires beneath terminal screws on base using  
appropriate wiring schematic (see figs. 2 through 7).  
Turn on power to the system.  
3. Place base over hole in wall and mark mounting hole  
locations on wall using base as a template.  
Fan Operation  
4. Move base out of the way. Drill mounting holes.  
If your system does not have a G terminal connection, skip to  
Heating System.  
5. Fasten base loosely to wall, as shown in fig. 1, using two  
mounting screws. Place a level against bottom of base,  
adjust until level, and then tighten screws. (Leveling is for  
appearance only and will not affect thermostat operation.) If  
you are using existing mounting holes, or if holes drilled are  
too large and do not allow you to tighten base snugly, use  
plastic screw anchors to secure subbase.  
1. Move fan to ON position. The blower should begin to  
operate.  
2. Move fan switch to AUTO position. The blower should  
stop immediately.  
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JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Hot  
Y
B
O
G
W
RC  
RH  
THERMOSTAT  
SYSTEM  
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  
Y
B
O
G
W
RC  
RH  
SYSTEM  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Cooling  
System Relay  
Fan  
Y
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  
Y
B
O
G
W
RC RH  
THERMOSTAT  
SYSTEM  
SYSTEM  
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  
24 VAC  
120 VAC  
Neutral  
* Reversing valve is energized when the  
system switch is in the HEAT position  
Neutral  
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  
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.  
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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).  
SYSTEMswitch(COOL, OFF,HEAT).  
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1) Select Temporary Hold Time - The thermostat can hold  
any 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  
The Display  
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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.  
Example:  
1. You have selected 3:00 hours for the Temporary Hold  
time period.  
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.  
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.  
10  
3. After releasing the button, HOLD on the display will  
blink.  
11  
12  
Alternately displays current time and temperature. Dis-  
plays LO in the minutes field when batteries are low.  
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.  
The word HOLD is displayed when the thermostat is in the  
HOLDmode. HOLDisdisplayedflashingwhenthethermo-  
stat is in a temporary HOLD Mode.  
13  
Displays currently programmed set temperature (this is  
blank when SYSTEM switch is in the OFF position).  
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.  
CONFIGURATIONMENU  
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.  
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.  
The configuration menu table summarizes the configuration  
options. An explanation of each option follows.  
4) 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.  
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.  
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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  
Select display backlight OFF or ON  
SL  
2
3
HOLD  
*
*
(FA)  
d-L  
(ON)  
OFF  
HOLD  
4
5
LOC  
(OFF)  
ON  
HOLD  
*
*
Select compressor lockout OFF or ON  
Select temperature display adjustment higher or lower  
0 HI  
(0)  
4 LO to  
4 HI  
HOLD  
6
7
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  
• CONFIGURATION MENU — Allows you to customize  
certain thermostat options.  
5
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.  
PROGRAMMING YOUR THERMOSTAT  
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.  
6) Select F° or C° Readout - Changes the display readout to  
Centigrade or Fahrenheit as required.  
• When heating (cooling) your building, program the  
temperatures to be cooler (warmer) when the building is  
vacant or during periods of low activity.  
• During early morning hours, the need for cooling is  
usually minimal.  
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.  
• 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.  
Planning Your Program  
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.  
• 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.  
If you want to change the preprogrammed times and tempera-  
tures, follow these steps.  
Determine the time periods and temperatures for your program.  
You must program four time periods. However, you may use the  
same heating and cooling temperatures for consecutive time  
periods.  
• HOLD TEMPERATURE — The thermostat can hold any  
temperature within its range for an indefinite period without  
reverting to the programmed temperature. Momentarily  
press HOLD button. HOLD will be displayed. Then choose 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.  
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.  
SAMPLE  
Heating/Cooling Schedule Plan  
Heating/Cooling Schedule Plan (Factory Program)  
Start  
Time  
Start  
Time  
Period  
Temperature  
Period  
Temperature  
70˚F  
1ST HEAT  
1ST HEAT  
6:00 AM  
2ND HEAT  
3RD HEAT  
4TH HEAT  
1ST COOL  
2ND COOL  
3RD COOL  
4TH COOL  
2ND HEAT  
3RD HEAT  
4TH HEAT  
1ST COOL  
2ND COOL  
3RD COOL  
4TH COOL  
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  
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Enter Cooling Program  
Entering Your Program  
Follow these steps to enter the heating and cooling programs  
you have selected.  
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.  
Set Current Time  
1. PressTIMEbuttononce. Thedisplaywillshowthehouronly.  
PM  
EXAMPLE:  
1. Move SYSTEM switch to COOL position.  
2. Follow the procedure for entering your cooling program,  
using your selected cooling times and temperatures.  
2. Press and hold either  
or  
until you reach the correct  
hour and AM/PM designation (AM begins at midnight; PM  
begins at noon).  
3. Press TIME once. The display window will show the minutes  
only.  
CHECKYOURPROGRAMMING  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
EXAMPLE:  
1. Move SYSTEM switch to HEAT position.  
4. Press and hold either  
minutes.  
or  
until you reach the correct  
2. Press PRGM to view the 1st heating period time and  
temperature. Each time you press PRGM, the next heating  
period time and temperature will be displayed in sequence  
(you may change any time or temperature during this proce-  
dure).  
Enter Heating Program  
1. Move the SYSTEM switch to HEAT.  
2. PressPRGMonce. Displayedarethecurrentlyprogrammed  
start time for the 1st heating period and the currently  
programmed temperature (flashing).  
3. Press RUN.  
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.  
AM  
EXAMPLE:  
YOURTHERMOSTATISNOWCOMPLETELYPROGRAMMEDAND  
READY TO PROVIDE MAXIMUM COMFORT AND EFFICIENCY!  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 70° is the programmed  
temperature(thisexamplereflectsfactorypreprogramming).  
3. Press  
or  
to change the displayed temperature to  
TROUBLESHOOTING  
your selected temperature for the 1st heating program  
period.  
Reset Operation  
If a voltage spike or static discharge blanks out the display or  
4. Press TIME once (the programmed time will flash). Press  
or  
until your selected time appears. The time will causes erratic thermostat operation you can reset the thermo-  
change in 15 minute increments. When your selected time  
is displayed, press TIME again to return to the change  
temperature mode.  
stat by pressing  
,
and TIME at the same time. This also  
resets the factory defaults to the configuration menu and  
program. If the thermostat has power, has been reset and still  
does not function correctly contact your heating/cooling ser-  
vice person or place of purchase.  
5. Press PRGM once. The currently programmed start time  
and setpoint temperature for the 2nd heating program  
period will appear.  
Batteries  
6. Repeat steps 3 and 4 to select the start time and heating  
temperature for the 2nd heating program period.  
For optimum performance, we recommend replacing batteries  
once a year with fresh "AA" Energizer® alkaline batteries.  
7. Repeat steps 3 through 5 for the 2nd, 3rd and 4th heating  
program periods. Programming is now complete.  
For Troubleshooting information, see next page  
8. When you have completed entering your program, press  
RUN.  
6
                                                                                 
                                                                                 
                                                                                   
                                                                                   
                                                                                     
                                                                                     
                                                                                       
                                                                                       
                                                                                        
                                                                                        
                                                                                         
                                                                                         
                                                                                           
                                                                                           
                                                                                            
                                                                                            
                                                                                              
                                                                                              
                                                                                                 
                                                                                                 
                                                                                                   
                                                                                                   
                                                                                                    
                                                                                                     
                                                                                                      
                                                                                                      
                                                                                                                                                         
                                                                                                                                                         
                                                                                                                                                           
                                                                                                                                                           
                                                                                                                                                             
                                                                                                                                                             
                                                                                                                                                              
                                                                                                                                                              
                                                                                                                                                               
                                                                                                                                                                
                                                                                                                                                                 
                                                                                                                                                                 
                                                                                                                                                                   
                                                                                                                                                                   
                                                                                                                                                                    
                                                                                                                                                                    
                                      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TROUBLESHOOTING  
Symptom  
Po  
s
s
i
b
l
e
Cause  
C
o
r
r
e
c
t
i
v
e
A
c
t
i
o
n
NoHeat/NoCool/NoFan  
(common problems)  
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.  
Turn switch to ON.  
Replace door panel in proper position to engage  
safety interlock or door switch.  
Re-light pilot.  
No Heat  
2. System Switch not set to Heat.  
Set System Switch to Heat and raise setpoint  
above room temperature.  
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.  
Diagnostic: Set System Switch to Heat 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.  
No Cool  
1. System Switch not set to Cool.  
Set System Switch to Cool and lower setpoint  
below room temperature.  
2. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
3. Cooling System requires service or thermostat  
requires replacement.  
Same procedure as diagnostic for No Heat  
condition except set the thermostat to Cool and  
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).  
Heat, Cool or Fan Runs Constantly.  
1. Possible short in wiring.  
Check each wire connection to verify they are  
not shorted or touching together. No bare wire  
should stick out from under terminal screws.  
Try resetting the thermostat. If the condition  
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.  
2. Possible short in thermostat.  
3. Possible short in Heat/Cool/Fan system.  
4. Fan Switch set to Fan On.  
Furnace Cycles Too Fast or Too Slow  
(narrow or wide temperature swing)  
1. The location of the thermostat and/or the size  
of the Heating System may be influencing the  
cycle rate.  
Item 2 in the Configuration Menu is the adjustment  
that controls the cycle rate. If an acceptable cycle  
rate is not achieved using the FA (Fast) or SL  
(Slow) adjustment contact a local service person for  
additional suggestions.  
Cooling Cycles Too Fast or Too Slow  
(narrow or wide temperature swing)  
1. The location of the thermostat and/or the size  
of the Cooling System may be influencing the  
cycle rate.  
The cycle rate for cooling is fixed and can not be  
adjusted. Contact a local service person for  
suggestions.  
Thermostat Setting and Thermometer  
Disagree  
1. Thermostat thermometer setting requires  
adjustment.  
The thermometer can be adjusted +/- 4 degrees as  
listed in item 7 of the Configuration Menu. No other  
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.  
Heat or Cool Starts Early  
1. EMR activated  
See Configuration Menu (Item 4).  
Thermostat Does Not Follow Program  
1. AM or PM set incorrectly in program.  
2. AM or PM set incorrectly on the clock.  
3. Voltage spike or static discharge.  
Check current clock and program settings including  
the AM or PM designations for each time period.  
If a voltage spike or static discharge occurs use the  
Reset Operation listed above.  
Blank Display and/or Keypad Not  
Responding  
1. Loss of power and dead batteries.  
2. Voltage Spike or Static Discharge.  
Replace batteries and check heat/cool system for  
proper operation. If a voltage spike or static discharge  
occurs use the Reset Operation listed above.  
7

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