Troubleshooting, Enter Cooling Program

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

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.Press SYSTEM button to COOL position.

2.Follow Enter Heating Program for entering your cooling program, using your selected cooling times and tempera- tures.

If you are programming you r thermostat 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'sprogramming 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

Possible Cause

Corrective Action

No Heat/No Cool/No Fan

(common problems)

No Heat

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.

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

1F85-277 specifications

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