White Rodgers 90 manual System and Thermostat Diag- nostics, Temporary Program Override

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The following steps will allow you to change the number of hours for filter change-out.

1.If CHNG FLTR is on the display, press the FILTER key once to reset the timer. If you do not see CHNG FLTR proceed to step 2.

2.Press the FILTER key, The display will show SET FILTER TIME and the number of hours remaining before

CHNG FLTR indicator will display.

3.Press the FILTER key a second time. The display will show SET FILTER TIME and will show the number of hours to filter change.

4.Press TIME FWD or TIME BACK to change the time to your require- ments.

5.Press PROGRAM RUN to return to the normal operating mode.

NOTE: If unsure what interval to use between filter changes or cleaning,

contact the manufacturer of your heating/cooling equipment.

System and Thermostat Diag- nostics.

The display will indicate CHECK SYS if the room temperature does not rise within two hours of the call for heat. After two hours the thermostat will quit calling for heat for one minute (this allows some furnaces to reset) and call for heat again. It will repeat this sequence three times. If the temperature still does not rise, it will continue to call for heat. This normally indicates the heating system is not working correctly. You may wish to consult your furnace manufacturer or service person.

The display will indicate CHECK STAT if one of the following occurs.

•One of the keys is stuck down or in. Check the keys, make sure nothing is pushing them in.

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•The thermostat sensor is not functioning. If using a remote sensor, check connections, wiring and power.

After checking the above, press PROGRAM RUN to reset the display. If this does not clear the display, disconnect power for five minutes.

If these checks fail to solve the problem, the thermostat should be replaced.

Temporary Program Override.

Any time your program is running and you would like to override it for a specific amount of time, press

or until the temperature you want is displayed. The display will indicate HOLD, and the number of hours remaining in the hold period will be indicated with the word HRS. To adjust the length of time for the override, press TIME FWD or TIME BACK . HOLD TILL will be displayed

Features

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Contents Page Page Introduction Thermostat Buttons OrientationDisplay Configuration User Menu Keypad Lockout Menu access from User Menu Programmed Operation Planning Your Program ProgrammingEntering Your Program To Set the Clock To Set the DayFAN Sample Program Schedule Shows factory programming Personal Program Schedule Selectable Energy Management Recovery EMR FeaturesFahrenheit or Celsius Tempera- ture Display Outdoor Temperature SenseOne Shot Fan Control Beeper onFactory Preprogrammed Times and Temperatures Traditional Features Automatic ChangeoverActivate RUN PRG by Telephone Compressor Run Time and Auxiliary Run TimeProgrammable Fan Control Air Filter Change-Out IndicatorTemporary Program Override System and Thermostat Diag- nosticsIndefinite Program Hold Programmable Vacation Time/ Temperature OperationOptional Remote Temperature Sense Program View and ADV. to Arm Chair Programming Daylight Savings Time ButtonLarge Lighted Liquid Crystal Display LCD Thermostat Startup After Total Power Loss Index Features
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