EMERSON White Rodgers 1F81 Programmable Heat Pump Thermostat Installation and Operation Instructions

EMERSON White Rodgers 1F81 Programmable Heat Pump Thermostat

 

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

Your new White-Rodgers 5-Day/1-Day/1-Day Digital Thermostat 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.

Features

• Separate 5-day (weekday), 1-day (Sat), and 1-day (Sun) Programming with four separate time/temperature periods per day
• Simultaneous heat and cool program storage
• Preprogrammed temperature control
• LCD continuously displays set point and alternately displays time and room temperature
• Backlit display when any key is pushed
• Temperature override until the next program period
• Manual program override (HOLD temperature)
• Temporary HOLD
• °F/°C convertibility
• Temperature range 45° to 90°F
• R, C, W, W2, G, Y and Y2 terminals
• Optional C terminal (Dual Power option)
• Program storage in case of power loss.
• 2 “AA” Energizer® alkaline batteries included.

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. Do not exceed the specification ratings. All wiring must conform to local and national electrical codes and ordinances. This control is a precision instrument and should be handled carefully. Rough handling or distorting components could cause the control to malfunction.

CAUTION
To prevent electrical shock and/or equipment damage, disconnect electric power to the system at the main fuse or circuit breaker box until installation is complete.

WARNING
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards. Do not short out terminals on the gas valve or primary control to test. Short or incorrect wiring will damage the thermostat and could cause personal injury and/or property damage. Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.

SPECIFICATIONS

ELECTRICAL DATA

• Electrical Rating: 20 to 30 VAC 50/60 Hz. or D.C.
  • 0.05 to 1.5 Amps (Load per terminal)
  • 1.5 Amps Maximum Total Load (All terminals combined)
• 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
• APPLICATIONS
  For use with:
  • Heat/cool systems with up to two stages of heat, two stages of cool
• DO NOT USE WITH:
  • Millivolt systems
  • Systems exceeding 30 VAC and 1.5 amps
  • 3-wire zoned hydronic heating systems

INSTALLATION

REMOVE OLD THERMOSTAT

1. Shut off electricity at the main fuse box until installation is complete. Ensure that the electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires still attached, remove the wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.
3. Disconnect the wires from old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.
4. Install new thermostat using the following procedures

ATTENTION!
This product does not contain mercury. However, this product may replace a unit that contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing nonabsorbent gloves, take up the spilled mercury and place it into a container that can be sealed. If a cell becomes damaged, the unit should be discarded. Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container. Refer to www.white-rodgers.com for a location to send the product containing mercury.

ELECTRIC HEAT SYSTEMS
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 thermostat base (see fig. 1) and switch it to the ELECTRIC position. This will allow the thermostat to energize the fan immediately on a call for heat. If you are unsure if the heating/ cooling system requires the thermostat to control the fan, and contact a qualified heating and air conditioning service person.

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently pull the cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit. If necessary, move the electric heat switch (see ELECTRIC HEAT SYSTEMS, above).
2. Connect wires beneath terminal screws on base using the appropriate wiring schematic (see figs. 2 through 4).
3. Place base over hole in wall and mark mounting hole locations on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two mounting screws. Place a level against the 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.
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.

BATTERY LOCATION
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. 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) HEATING SYSTEMS
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 CONFIGURATION MENU, page 5).

WIRING

NOTE
The following wiring diagrams show typical terminal identification and wiring. For proper installation, refer to the original manufacturer’s instructions.

 

NOTE Relay contacts shown are thermostatically operated. * The 24 Volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

Figure 2. Typical wiring diagram for single transformer systems

Figure 3. Typical wiring diagram for two-transformer systems with NO safety circuits

 

Figure 4. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems

CHECK THERMOSTAT OPERATION

If at any time during testing your system does not operate properly, contact a qualified service person. Turn on the power to the system.

Fan Operation
If your system does not have a G terminal connection, skip to Heating System.

1. Move the fan switch to the ON position. The blower should begin to operate.
2. Move the fan switch to the AUTO position. The blower should stop immediately.

Heating System

1. Move the SYSTEM switch to the HEAT position. If the heating system has a standing pilot, be sure to light it.
2. Press to adjust the thermostat setting above room temperature. The heating system should begin to operate.
3. Both stages of the heating system should begin to operate when the setpoint is set greater than 3˚F above ambient.
4. Press to adjust the temperature setting below room temperature. The heating system should stop operating.

CAUTION
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

1. Move the SYSTEM switch to the COOL position.
2. Press to adjust the thermostat setting below room temperature. The blower should come on immediately at high speed, followed by cold air circulation
3. Both stages of the cooling system should begin to operate when the setpoint is set greater than 3˚F below ambient.
4. Press to adjust the temperature setting above room temperature. The cooling system should stop operating.

THERMOSTAT QUICK REFERENCE

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
consists 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.

1. Raises temperature setting.
2. Lowers temperature setting.
3. TIME button.
4. PRGM (program) button.
5. RUN (run program) button.
6. HOLD temperature button.
7. FAN switch (ON, AUTO).
8. SYSTEM switches (COOL, OFF, HEAT).
9. Indicates day of the week.
10. The flame icon ( ) is displayed when the SYSTEM switch is in the HEAT position. Snowflake icon ( )is displayed (non-flashing) when the SYSTEM switch is in the COOL position. Snowflake is displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly.
11. Displays BATT when the 2 “AA” batteries are low and should be replaced.
12. Alternately displays current time and temperature.
13. The word HOLD is displayed when the thermostat is in HOLD mode. HOLD is displayed flashing when the thermostat is in a temporary HOLD Mode.
14. Displays currently programmed set temperature (this is blank when the SYSTEM switch is in the OFF position).
15. Displays FLTR when the system has run for the programmed filter time period as a reminder to change or clean your air filter.
16. One indicates first stage, +2 indicates the second stage

CONFIGURATION MENU

The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements. 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.

INSTALLER/CONFIGURATION MENU

The configuration menu table summarizes the configuration options. An explanation of each option follows. Press HOLD to change to the next menu item or press TIME to go back to the previous item in the menu. To exit the menu and return to the program operation, press RUN. If no keys are pressed within fifteen minutes, the thermostat will revert to normal operation.

Configuration Menu

Step	Press Button(s)	Displayed (Factory Default)	Press or to select:	COMMENTS
1	PRGM and RUN	HOLD (0:00)	0 to 8 hrs (in 15 minute increments)	Select temporary Hold time
2	HOLD*	(FA)	SL	Select FA or SL (Fast or Slow) heating cycle rate
3	HOLD*	d-L (ON)	OFF	Select display backlight OFF or ON
4	HOLD*	E (ON)	OFF	Select Energy Management Recovery OFF or ON
5	HOLD*	Filter (000)	0 to  1950  hours (in 50 hour increments)	Select filter replacement run time
6	HOLD*	LOC (OFF)	ON	Select compressor lockout OFF or ON
7	HOLD*	0 HI (0)	4 LO to 4 HI	Select temperature display adjustment higher or lower
		(F)	C	Select temperature display to F or C
9	HOLD*	1 + 2 FA   (ON)	OFF	Select ON to start 2nd stage immediately when the setpoint is manually raised more than 3°F in HEAT or lowered more than 3°F in COOL from room temperature
10	RUN			Returns to normal operation

Press HOLD to advance to next item or TIME to move backward to the previous item

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
   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 set reminder.
   3. After releasing the button, HOLD on the display will blink.
   4. Use or set the temperature to your preference. 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 programmed temperature and HOLD will no longer blink or display.
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 normal 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 approximately 1.5°F.
3. Select backlit display – The display backlight improves display contrast in low lighting conditions. Selecting the backlight 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. Select Energy Management Recovery OFF or ON
   – Energy Management Recovery (EMR) causes the thermostat 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, cooling 15 minutes early, for every 1° of temperature required to reach setpoint. Example: You select EMR and have your heating programmed 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 requires more time per degree because it takes longer to reach temperature.
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.
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 system loses power. It will also wait 5 minutes minimum between cooling cycles. This is intended to help protect the compressor but you have the option to change the display temperature to match your previous thermostat. 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.
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
8. Select F° or C° Readout – Changes the display readout to Centigrade or Fahrenheit as required.
9. Select Stage Fast (ON or OFF) – When selected ON, the second stage starts as soon as the setpoint temperature is manually raised 3°F in heat or lowered 3°F in cool from room temperature. When selected OFF, the second stage will delay approximately 15 minutes before starting.

OPERATION AND PROGRAMMING

MANUAL OPERATION

• HOLD TEMPERATURE — With the SYSTEM switch set to HEAT or COOL, momentarily press the HOLD button. HOLD will be displayed. Use or to adjust the temperature. The thermostat will hold the room temperature at the selected setting until you press RUN button to return to program operation.
• TEMPERATURE OVERRIDE — Press or until the display shows the temperature you want. The thermostat will override current programming and keep the room tem-perature at the selected temperature until the next program period begins. Then the thermostat will automatically revert to the program. Raising the temp in heating 3˚F above the room temp will activate any second-stage heating. Lowering the temp 3˚F below the room temp in cooling will activate any second-stage cooling.
• TEMPORARY HOLD TEMPERATURE —The thermostat can hold any temperature within its range for the length of time selected in the configuration menu. See Configuration Menu section, step 1.
• During early morning hours, the need for cooling is usually minimal.

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.

• When heating (cooling) your building, program the temperature to be cooler (warmer) when the building is vacant or during periods of low activity.

SAMPLE
Heating/Cooling Schedule Plan (Factory Program)

Period		WEEKDAYS (5 Day)		SATURDAY (1 Day)		SUNDAY (1 Day)
		Start Time	Temp	Start Time	Temp	Start Time	Temp
HEAT	1ST	6:00 AM	70°F	6:00 AM	70°F	6:00 AM	70°F
	2ND	8:00 AM	62°F	8:00 AM	62°F	8:00 AM	62°F
	3RD	5:00 PM	70°F	5:00 PM	70°F	5:00 PM	70°F
	4TH	10:00 PM	62°F	10:00 PM	62°F	10:00 PM	62°F
COOL	1ST	6:00 AM	78°F	6:00 AM	78°F	6:00 AM	78°F
	2ND	8:00 AM	85°F	8:00 AM	85°F	8:00 AM	85°F
	3RD	5:00 PM	78°F	5:00 PM	78°F	5:00 PM	78°F
	4TH	10:00 PM	82°F	10:00 PM	82°F	10:00 PM	82°F

Planning Your Program

Look at the factory preprogrammed times and temperatures are shown in the sample schedule. If this program will suit your needs, simply press the RUN button to begin running the factory preset program. If you want to change the preprogrammed times and temperatures, follow these steps. Determine the time periods and temperatures for your weekday and weekend programs. You must program four periods for both the weekday and weekend programs. However, you may use the same heating and cooling temperatures for consecutive time periods. You can choose start times, heating temperatures, and cooling temperatures independently for both weekday 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). 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

Heating/Cooling Schedule Plan

Period		WEEKDAYS (5 Day)		SATURDAY (1 Day)		SUNDAY (1 Day)
		Start Time	Temp	Start Time	Temp	Start Time	Temp
HEAT	1ST
	2ND
	3RD
	4TH
COOL	1ST
	2ND
	3RD
	4TH

Entering Your Program
Follow these steps to enter the heating and cooling programs you have selected.

Set Current Time and Day

1. Press the TIME button once. The display will show the hour only.
   EXAMPLE: PM
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.
   EXAMPLE:
4. Press and hold either or until you reach the correct minutes.
5. Press TIME once. The display will show the day of the week.
6. Press or until you reach the current day of the week.
7. Press RUN once. The display will show the correct time and room temperature alternately.

Enter Heating Program

1. Move the SYSTEM switch to HEAT.
2. Press PRGM once. “MO TU WE TH FR” (indicating weekday program) will appear in the display. Also displayed are the currently programmed start time for the 1st heating period and the currently programmed temperature (flashing).
3. This display window shows that for the 1st weekday period, the start time is 6:00 AM, and 68° is the programmed temperature (this example reflects factory preprogramming).
4. Press or to change the displayed temperature to your selected temperature for the 1st heating program period.
5. Press TIME once (the programmed time will flash). Press 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.
6. Press PRGM once. The currently programmed start time and setpoint temperature for the 2nd heating program period will appear.
7. Repeat steps 3 and 4 to select the start time and heating temperature for the 2nd heating program period.
8. Repeat steps 3 through 5 for the 3rd and 4th heating program periods. Weekday heating programs are now complete.
9. 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.
10. Repeat steps 3 through 7 to complete Saturday’s heating programming.
11. 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.
12. Repeat steps 3 through 7 to complete Sunday heating programming.  When you have completed entering your heating program, press RUN.

CAUTION
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 the SYSTEM switch to the COOL position.
2. Follow the procedure for entering your heating program, using your selected cooling times and temperatures.

CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming one
final time before beginning the thermostat operation.

1. Move the SYSTEM switch to the 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).
3. Press RUN.
4. Move the SYSTEM switch to the COOL position.
5. Repeat step 2 to check the cooling program.
6. Move the SYSTEM switch to HEAT or COOL and press RUN to begin program operation.

YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO PROVIDE MAXIMUM COMFORT AND EFFICIENCY

TROUBLESHOOTING

Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat 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 service person
or place of purchase. Batteries For optimum performance, we recommend replacing the batteries once a year with fresh “AA” Energizer® alkaline batteries.

Symptom	Possible Cause		Corrective Action
No Heat/No Cool/No Fan	1.	Blown fuse or tripped circuit breaker.	Replace fuse or reset breaker.
(common problems)	2.	Furnace power switch to OFF.	Turn switch to ON.
	3.	Furnace blower compartment door or	Replace door panel in proper position to engage
	4.	panel loose or not properly installed.	safety interlock or door switch.
No Heat	1.	Pilot light not lit.	Re-light pilot.
	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	Many furnaces have safety devices that shut the system down when
		be intermittent.	a lock-out condition occurs. If the heat works intermittently contact
	5.	Heating System requires service or	the furnace manufacturer or local service person for assistance.
		thermostat requires replacement.	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.
No Cool	1. 2. 3.	System Switch not set to Cool. Loose connection to thermostat or system. Cooling System requires service or thermostat requires replacement.	Set System Switch to Cool and lower setpoint below room temperature. Verify thermostat and system wires are securely attached. 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. 2. 3. 4.	Fan Switch set to Fan On. Possible short in wiring. Possible short in thermostat. Possible short in Heat/Cool/Fan system.	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 as described below. 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.
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	1.	AM or PM set incorrectly in program.	Check current clock and program settings including the AM or PM
Program	2.	AM or PM set incorrectly on the clock.	designations for each time period. If a voltage spike or static discharge
	3.	Voltage spike or static discharge.	occurs use the Reset Operation listed above.
Blank Display and/or Keypad Not Responding	1. 2.	Loss of power and dead batteries. 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.

White-Rodgers is a division of Emerson Electric Co.
The Emerson logo is a trademark and service mark 8 of Emerson Electric Co.www.white-rodgers.com www.emersonclimate.com

REFERENCE:

Download Manual: EMERSON White Rodgers 1F81 Programmable Heat Pump Thermostat Installation and Operation Instructions

EMERSON White Rodgers 1F81 Programmable Heat Pump Thermostat Installation and Operation Instructions