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OPERATION
heating program period 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.
5. Press PRGM once. The currently programmed start time
and setpoint temperature for the Monday's 2nd heating
program period will appear.
6. Repeat steps 3 and 4 to select the start time and heating
temperature for Monday's 2nd heating program period.
7. Repeat steps 3 through 5 for the 3rd and 4th heating
program periods. Monday heating programs are now
complete.
Enter Cooling Program
1.
2.
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.
Press SYSTEM button to COOL position.
Follow Enter Heating Program for entering your cooling
program, using your selected cooling times and tempera-
tures.
If you are programming you rthermostat for the first time and you
want programming for all days of the week to be the same as
Monday's program, press RUN or HOLD at this point, and
proceed to Enter Cooling Program. (This simplified COPY
DAY feature only works the first time you program your thermo-
stat. If you want to copy one day's programming to a specific day
programming, refer to COPY DAY FUNCTION in OPERATING
FEATURES. If you are changing your thermostat's program-
ming, you must program each day separately.)
8. Press PRGM once. "TU" (indicating Tuesday
program) wilt appear in the display, along with the
start time for the 1st heating period and the currently
programmed temperature.
9. Repeat steps 3 through 7 to complete Tuesday's
heating programming.
10.Continue entering each day's programming until all
heating periods time and temperatures have been
entered.
11.When you have complete entering your heating
program, press RUN.
CHECKYOUR PROGRAMMING
Follow these steps to check your thermostat programming
one final time before beginning thermostat operation.
1. Press SYSTEM button to HEAT position.
2. Press PRGM to view the 1st Monday heating period
time and temperature. Each time you press PRGM, the
next heating period time and temperature will be display-
ed in sequence for each weekday, then Saturday and
Sunday program periods (you may change any time or
temperature during this procedure).
3. Press RUN.
4. Press SYSTEM button to COOL position.
5. Repeat step 2 to check cooling program.
6. Press SYSTEM button to HEAT or COOL and press
RUN to begin program operation.
NOTE: Batteries are not required to keep your programming
or menu data. With two optional "AA" batteries installed,
your thermostat will maintain time and continuously
display the temperature during a loss of AC power.
Installed batteries will also allow programming prior to
installation.
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO
PROVIDE MAXIMUM COMFORTAND EFFICIENCY7
TROUBLESHOOTING
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermo-
stat by removing the wires from terminals R and C and removing batteries for 2 minutes. After resetting the thermostat, replace
the wires and batteries. If the thermostat has been reset and still does not function correctly, contact your heating/cooling
service person or place of purchase.
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
10
Possible Cause
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.
2. SYSTEM button not set to HEAT.
3. Loose connection to thermostat or
system.
4. Furnace Lock-Out Condition. Heat
may also be intermittent.
5. Heating system requires service or
thermostat requires replacement.
Corrective Action
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.
Press SYSTEM button to HEAT and raise setpoint
above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut down
when a lock-out condition occurs. If the heat works
intermittently contact the furnace manufacturer or
local service person for assistance.
Diagnostic: Press SYSTEM button to HEAT and
raise the setpoint above room temperature. Within a
few seconds the thermostat should make a soft click