7

lennox thermostat manual 51m32

LINK 1 ENTER SITE >>> Download PDF
LINK 2 ENTER SITE >>> Download PDF

File Name:lennox thermostat manual 51m32.pdf
Size: 4141 KB
Type: PDF, ePub, eBook

Category: Book
Uploaded: 24 May 2019, 21:45 PM
Rating: 4.6/5 from 812 votes.

Status: AVAILABLE

Last checked: 14 Minutes ago!

In order to read or download lennox thermostat manual 51m32 ebook, you need to create a FREE account.

Download Now!

eBook includes PDF, ePub and Kindle version

✔ Register a free 1 month Trial Account.

✔ Download as many books as you like (Personal use)

✔ Cancel the membership at any time if not satisfied.

✔ Join Over 80000 Happy Readers

lennox thermostat manual 51m32Consult authorities If you find any See figure 3. The FAN vals. This indicates that the equipment requires ser- tions. If ROOM the thermostat is in off mode, normal heat mode is enabled when the HEAT button is pressed. If the thermostat is in off mode, cool mode is en- ROOM abled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box. Also note the presence of a fan icon in the FAN box. After the desired balance point is reached, the HOME screen will reappear after about eight seconds. Please check your inbox, and if you can’t find it, check your spam folder to make sure it didn't end up there. Please also check your spam folder. The thermostat also includes a programmable filter change reminder and a system check indicator. The system check indicator will notify the user of the need for equipment service. Consult authorities having jurisdiction before installation. If you find any damage, immediately contact the last carrier. Refer to the installation manual for instructions regarding installation and wiring of the thermostat. This occurs as a normal part of thermostat initialization. Within a few seconds, the display will appear as shown in figure 2 After about 1 minute of warm?up time, the actual room temperature will be displayed. HEAT mode is the system default (as indicated in the SYSTEM box at lower right). The backlight will turn off 8 seconds after the last key is pressed. See figure 3. If the thermostat is in off mode, heat mode is enabled when the HEAT button is pressed. This is indicated by This is indicated by OFF in the SYSTEM box as shown in figure 5. When in heat mode, if the actual temperature is lower than the temperature setpoint, a heating demand is detected by the thermostat. The thermostat will then activate the heating equipment to satisfy the demand. Heating operation is indicated by a flame icon in the This indicates that the heating demand has been satisfied and that the heating equipment has been turned off.

Tags:
• lennox thermostat manual 51m32, lennox thermostat 51m32 installation manual, lennox thermostat manual 51m32, lennox thermostat 51m32 manual.

See figure 3. If the thermostat is in off mode, cool mode is enabled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box. This is indicated by OFF in the SYSTEM box. When in cool mode, if the room temperature is higher than the temperature setpoint, a cooling demand is detected by the thermostat. Cooling operation is indicated by a snowflake icon in the SYSTEM box as shown in figure 7. This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. Cooling equipment operation is locked out for 5 minutes after a demand has been satisfied. If another cooling demand occurs during this 5?minute interval, the snowflake icon will flash; however, the cooling equipment will not run until the 5?minute delay has elapsed. See figure 3. The FAN button can be used to select either continuous fan mode or auto fan mode. Also, ON will be displayed in the FAN box as shown in figure 9. In this case, AUTO will be displayed in the FAN box as shown in figure 10. Also note the presence of a fan icon in the FAN box. This icon indicates that the fan is running. The filter reminder can be set for 1, 3, 6, or 12?month intervals. The SETTINGS button, located behind the door on the right?hand side of the thermostat is used to set the filter reminder interval. See figure 3. Press the SETTINGS button from the HOME screen to display the Filter Reminder Settings screen as shown in figure 11. Use the UP arrow while in the Filter Reminder Settings screen to select the desired interval between reminders. It may be necessary to press the UP arrow several times to access the desired setting. The After the filter has been changed, reset the filter reminder by pressing the SETTINGS button for 4 seconds. The screen will blink for a few moments to indicate that the timer has been reset. This indicates that the equipment requires service from a qualified service technician. The SERVICE indicator is shown in figure 13. This can be useful on rare occasions when the the thermostat is behaving abnormally (e.g. after an electrical storm or power outage). The RESET button can be used to recover from this situation. The RESET button is visible in figure 3. Use a paper clip or small pencil to press the RESET button. After the RESET button is pressed, the thermostat settings will return to the defaults listed in the Displayed temperature is the average of the last four measurements. The thermostat also includes a programmable filter change reminder and a system check indicator. The system check indicator will notify the user of the need for equipment service. Consult authorities having jurisdiction before installation. If you find any damage, immediately contact the last carrier. Refer to the installation manual for instructions re- garding installation and wiring of the thermostat. This oc- curs as a normal part of thermostat initialization. Within a few seconds, the display will appear as shown in figure 2 (figure shows temperature in Fahrenheit units). The thermostat also includes a programmable filter change reminder and a system check indicator. The system check indicator will notify the user of the need for equipment service. Thermostat 51M32 is suitable for non-heat pump, single. General These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation. Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. Introduction This d ocument d escribes the o peration o f L ennox t hermost at 51M32. Refer to the installation manual for instructions re - garding installation and wiring of the thermostat. HEA T All display segments are momentarily activated. This oc- curs as a normal part of thermostat initialization. The thermostat also includes a programmable filter change reminder and a system check indicator. Page 2 Display ?https://events.citeve.pt/chat-conversation/dell-monitor-rev-a00-manual Home Screen ROOM 70 Heat Mode Enabled 69 ROOM FAN AUTO 64 SYSTEM SETPOINT HEAT FAN AUTO SYSTEM HEAT Figure 2 Figure 4 Figure 2 illustrates the HOME screen. After about 1 minute of warm?up time, the actual room temperature will be displayed. HEAT mode is the system default (as indicated in the SYSTEM box at lower right). If the thermostat is in heat mode, heat mode is disabled when the HEAT button is pressed. Page 3 Cooling Demand Heating Demand ROOM 72 88 ROOM FAN 79 FAN AUTO AUTO SYSTEM SYSTEM COOL HEAT Figure 6 Figure 7 When the actual temperature rises above the temperature setpoint, the flame icon will disappear. This indicates that the heating demand has been satisfied and that the heating equipment has been turned off. NOTE ? The cooling equipment is activated for at least 4 minutes if no buttons are pressed during the demand interval. Page 4 Fan Control Filter Reminder The FAN button is located behind the small door on the right-hand side of the thermostat. See figure 3. The FAN button can be used to select either continuous fan mode or auto fan mode. If continuous fan mode is enabled, the fan will run continuously regardless of whether the heating or cooling equipment is running. Also, ON will be displayed in the FAN box as shown in figure 9. The 51M32 thermostat includes a filter reminder feature. Page 5 Service Indicator Technical Specifications When abnormal equipment operation is detected, the SERVICE indicator will flash on the upper-right corner of the screen. This indicates that the equipment requires service from a qualified service technician. The thermostat also includes a programmable filter change reminder and a system check indicator. Page 8 Enabling and Disabling Heat Mode Display. Home Screen ROOM 70 Use the HEAT button to select normal heat mode, emergency heat mode, or to disable heat modes as desired. If the thermostat is in off mode, normal heat mode is enabled when the HEAT button is pressed. This is indicated by HEAT in the SYSTEM box as shown in figure 4. FAN AUTO SYSTEM Normal Heat Mode Enabled ROOM HEAT Figure 2 Figure 2 illustrates the HOME screen. Page 9 Enabling and Disabling Cool Mode Heat Mode Disabled 69 ROOM 64 SETPOINT Use the COOL button to enable or disable cool mode as necessary. If the thermostat is in off mode, cool mode is enabled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box. FAN AUTO If the thermostat is in cool mode, cool mode is disabled when the COOL button is pressed. This is indicated by OFF in the SYSTEM box. Page 10 Fan AUTO with Icon Setpoint Display and Adjustment 69 ROOM SETPOINT 64 ROOM FAN 73 FAN AUTO AUTO SYSTEM SYSTEM HEAT HEAT Figure 11 Figure 9 To change from continuous to auto fan mode and vice versa, press the FAN button. Also note the presence of a fan icon in the FAN box. This icon indicates that the fan is running. After the desired setpoint is reached, the HOME screen will reappear after about 8 seconds. Page 11 DOWN arrow keys to the right of the display screen. Display of Filter Reminder ROOM 72 FILTER After the desired balance point is reached, the HOME screen will reappear after about eight seconds. Page 12 Table 2 51M33 Terminal Designations Default Thermostat Settings Default Thermostat settings are in table 1. Page 13 Service Reminder IMPORTANT The SERVICE indicator is displayed only under the following conditions: if the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the R terminal; LCD Backlight Activated for 8 seconds when any key is pressed. NOTE ? During an electrical storm or similar disturbance, the backlight may activate for a few seconds. This is normal and will no longer occur after the electrical disturbance has passed. Page 14 Table 3 Thermostat Output States Condition W1 Y1 G X X X X X X O E Electric Heat Backup. No Outdoor Sensor small heat demand large heat demand emergency heat demand cool demand no demand X X X X dc Gas Heat Backup (Dual Fuel). No Outdoor Sensor small heat demand large heat demand emergency heat demand cool demand no demand X X X X X X X X X X X X X X X X X dc Electric Heat Backup. The system check indicator will notify the user of the need for equipment service. Thermostat 51M32 is suitable for non-heat pump, single. General These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation. Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. Introduction This d ocument d escribes t he o peration o f L ennox t hermost at 51M32. Refer to the installation manual for instructions re - garding installation and wiring of the thermostat. HEA T All display segments are momentarily activated. This oc- curs as a normal part of thermostat initialization. Within a few seconds, the display will appear as shown in figure 2 (figure shows temperature in Fahrenheit units). After about 1 minute of warm?up time, the actual room temperature will be displayed. HEA T mode is the system default (as indi- cated in the SYSTEM box at lower right). A p ale blue display backlight will turn on each time a key is pressed. The backlight will turn off 8 seconds af ter the last key is pressed. Heating Control The HEA T button is located behind the small door on the right?hand side of the thermostat. See figure 3. Figure 3 Additional Thermost at Buttons Enabling and Disabling Heat Mode Us e the HEA T button to enable or disable heat mode as de- sired. If the thermostat is i n of f mode, heat mode is enabled when the HEA T button is pressed. Thi s is in di ca te d by HEA T in the SYSTEM box as shown in figure 4. Figure 4 Heat Mode Enabled ROOM SETPOINT 69 64 FA N AUTO SYSTEM HEA T If the thermostat is in heat mode, heat mode is disabled when the HEA T button is pressed. This is indicated by OFF in the SYSTEM box as shown in figure 5. Figure 5 Heat Mode Disabled ROOM SETPOINT 69 64 FA N AUTO SYSTEM OFF Heating Demand The thermostat must be in heat mode in order to properly control the heating equipment. When in heat mode, if t h e actual temperature is lower than the temperature setpoint, a heating demand is detected by the thermost at. The thermo- stat w ill t hen a ctivate t he h eating e quipment t o s atisfy the d e- mand. Heating operation is indicated by a flame icon in the SYSTEM box as shown in figure 6. This indicates that th e heating demand has been satisfied and that the heating equipment has been turned off. NOTE ? The heating equipment is activated for at least 3 minutes if no buttons are pressed during the demand inter- val. Cooling Control The COOL button is located behind the small door on the right-hand side of the thermostat. See figure 3. Enabling and Disabling Cool Mode Use the COOL button to enable or disable cool mode as necessary. If the thermosta t is in o ff mode, cool mode is en- abled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box. If the thermostat is in cool mode, cool mode is disabled when the COOL button is pressed. This is indicated by OFF in the SYSTEM box. Cooling Demand The thermostat must be in cool mode in order to properly control the cooling equipment. When in cool mode, if the room temperat ure is higher than the temperature setpoint, a cooling demand is detected by the thermostat. The t hermostat will then activate the c ooling e quipment t o satisfy the demand. Cooling operation is indicated by a snowflake icon in the SYSTEM box as shown in figure 7. Wh en the actual temperature drops below the temperature setpoint, the snowflake icon will disappear. This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. Figure 7 ROOM 79 FA N AUTO SYSTEM COOL Cooling Demand NOTE. The cooling equipment is activated for at least 4 minutes if no buttons are pressed during the demand inter- val. Cooling equipment operation is locked out for 5 min- utes af ter a demand has been satisfied. If another cooling demand occurs during this 5?minute interval, the snowflake icon will flash; however, the cooling equipment will not run until the 5?minute delay has elapsed. Adjusting T emperature Setpoint The temperature setpoint represents the desired tempera- ture of the space around the thermostat. T o adjust the setpoint, press the UP or DOWN arrow keys to the right of the display screen. Th e existing setpoint will be displayed just below the actual room temperature as shown in figure 8. Use the UP or DOWN arrow keys to adjust the setpoint up or down. Setpoint Display and Adjustment Figure 8 ROOM SETPOINT 69 64 FA N AUTO SYSTEM HEA T Aft e r the desired setpoint is reached, the HOME screen will reappear after about 8 seconds. See figure 3. The F AN button can be used to select either continuous fan mode or auto fan mode. If continuous fan mode is enabled, the fan will run continu- ously regardless of whether the heating or cooling equip- men t is running. Also, ON will be displayed in the F AN box as shown in figure 9. Figure 9 Fan ON with Icon ROOM 73 FA N ON SYSTEM HEA T If auto fan mode is selected, the fan will only run when the heating or cooling equipment is running. In this case, AUT O will be displayed in the F AN box as shown in figure 10. Figure 10 Fan AUTO with Icon ROOM 73 FA N AUTO SYSTEM HEA T T o c hange f rom c ontinuous t o a uto f an m ode a nd v ice v ersa, press t he F AN b utton. A lso n ote t he p resence o f a f an i con i n the F AN box. This icon indicates that the fan is running. Filter Reminder The 51M32 thermostat includes a filter reminder feature. Th e filter reminder can be set for 1, 3, 6, or 12?month inter- vals. The SETTINGS button, located behind the door on the right?hand side of the thermost at is used to set the filter reminder inte rval. See figure 3. Press the SETTINGS but- ton from the HOME screen to display the Filter Reminder Settings screen as shown in figure 1 1. Figure 1 1 Filter Reminder Settings 0 Filter The default setting for the filter reminder is 0, which dis- ables the function. Use the UP arrow while in the Filter R e- minder Settings screen to select the desired interval be- tween reminders. It may be necessary to press the UP arrow several times to access the desired setting. The HOM E screen will reappear about 10 seconds after the ar- row key has been pressed for the final time. Aft er the programmed interval has elapsed, the FIL TER re- minder w ill be displayed as shown in figure 12. After the fil- ter has been changed, reset the filter reminder by pressing the SETTINGS button for 4 seconds. The screen will blink fo r a few moments to indicate that the timer has been reset. Figure 12 Display of Filter Reminder ROOM 72 FIL TER FA N AUTO SYSTEM HEA T This indicates that the equipment requires ser- vice from a qualified service technician. The SER VICE indi- cator is shown in figure 13. This can be useful on rare occasions when the the thermostat is behav- ing abnormally (e.g. after an electrical storm or power out- age). The RESET bu tton can be used to recover from this situation. The RESET button is an unlabeled, recessed button lo- cated behind the door on the right?hand side of the thermo- stat, just below the SETTINGS button. The RESET button is visible in figure 3. Use a p aper clip or small pencil to press the RESET button. After the RESET button is pressed, the thermostat settings will return to the defaults listed in the Default Settings section. Displayed temperature is the average of the last four measurements. Minimum el ap sed time between any compressor activation and the next compressor activation: 6 minutes. NOTE ? All protection timers (except the compressor OFF timer) can be over?ridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEA T, or COOL buttons. When programmed time has elapsed, a FIL TER indicator is dis- played. Service Reminder The SE RVICE indicator is displayed only under the follow- ing conditions:.Af - te r 24 hours of power loss, programmed settings will be lost and replaced with default settings. IMPORT ANT Power must be applied for at least six consecutive hours pr ior to a power loss in order for memory to be ret ained for the specified time. LCD Backlight Activated for 8 seconds when any key is pressed. NOTE ? During an electrical storm or similar disturbance, th e backlight may activate for a few seconds. This is normal an d will no lon ger occur af ter the electrical disturbance has passed. See table 2. T able 2 Thermostat Output s Condition W1 Y1 G Gas Heat, Auto Fan heat demand X cool demand X X no demand Gas Heat, Continuous Fan heat demand X X cool demand X X no demand X Electric Heat, Auto Fan heat demand X X cool demand X X no demand Electric Heat, Continuous Fan heat demand X X cool demand X X no demand X NOTE.The system check indicator will notify the user of the need for equipment service. General These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation. Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. Introduction This d ocument d escribes the o peration of L ennox thermost at 51M33. Refer to the installation manual for instructions re - garding installation and wiring of the thermostat. HEA T All display segments are momentarily activated. This oc- curs as a normal part of thermostat initialization. Within a few seconds, the display will appear as shown in figure 2 (figure shows temperature in Fahrenheit units). After about 1 minute of warm?up time, the actual room temperature will be displayed. HEA T mode is the system default (as indi- cated in the SYSTEM box at lower right). A p ale blue display backlight will turn on each time a key is pressed. The backlight will turn off 8 seconds af ter the last key is pressed. Heating Control The HEA T button is located behind the small door on the right?hand side of the thermostat. See figure 3. Figure 3 Additional Thermost at Buttons Normal Heat Mode In normal heat mode, both the heat pump and the backup heat source are used to provide heat. If the thermostat de- tects t ha t the heat pump is not able to provide enough heat (as may be the case in very cold weather), then the backup heat source is activated. Emergency Heat Mode In emergency heat mode, only the backup heat source is used to provide heat. The heat pump is disabled. The back- up heat source will be activated only when there is a heat demand. Enabling and Disabling Heat Mode Use the HEA T button to select normal heat mode, emer- gency heat mode, or to disable heat modes as desired. If th e thermostat is in off mode, normal heat mode is enabled when the HEA T button is pressed. This is indicated by HEA T in the SYSTEM box as shown in figure 4. Figure 4 Normal Heat Mode Enabled ROOM SETPOINT 69 64 FA N AUTO SYSTEM HEA T If the thermostat is in normal heat mode when the HEA T button is pressed, then emergency heat mode is enabled. This is indicated by EMG. HEA T in the SYSTEM box as shown in figure 5. If the thermostat is in emergency heat mode when the HEA T button is pressed, then heat modes are disabled. This is indicated by OFF in the SYSTEM box as shown in figure 6. Figure 5 Emergency Heat Mode Enabled ROOM SETPOINT 69 64 FA N AUTO SYSTEM EMG. HEA T W hen in either heat mode, i f t he a ctual t emperature i s lower t han t he t emperature s etpoint, a h eating demand i s de- tected b y t he t hermostat. T he t hermostat w ill t hen a ctivate t he heating equipment to satisfy the demand. Heating operation is indicated by a f lame icon in t he SYSTEM box as s hown in fi gu re 7. Figure 7 Heating Demand ROOM 72 88 FA N AUTO SYSTEM HEA T When the actual temperature rises above the temperature setpoint, the flame icon will disappear. This indicates that th e heating demand has been satisfied and that the heating equipment has been turned off. NOTE ? The heat pump is activated for at least 4 minutes if no buttons are pressed during the demand interval. The backup heat source is activated for at least 3 minutes if no buttons are pressed during the demand interval. Heat pump operation is locked out for 5 minutes af ter a de- ma nd has been satisfied. If another heat pump demand oc- curs during this 5?minute interval, the flame icon will flash; however, the heat pump will not run until the 5?minute delay has elapsed. Cooling Control The COOL button is located behind the small door on the right-hand side of the thermostat. See figure 3. Enabling and Disabling Cool Mode Use the COOL button to enable or disable cool mode as necessary. If the thermostat is in off mode, cool mode is en- abled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box. If the thermostat is in cool mode, cool mode is disabled when the COOL button is pressed. This is indicated by OFF in the SYSTEM box. Cooling Demand The thermostat must be in cool mode in order to properly control the cooling equipment. When in cool mode, if the room t emperature is higher than the temperature setpoint, a cooling demand is detected by the thermostat. The t hermostat will then activate the c ooling e quipment t o satisfy the demand. Cooling operation is indicated by a snowflake icon in the SYSTEM box as shown in figure 8. Wh en the actual temperature drops below the temperature setpoint, the snowflake icon will disappear. This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off. Figure 8 ROOM 79 FA N AUTO SYSTEM COOL Cooling Demand NOTE. The cooling equipment is activated for at least 4 minutes if no buttons are pressed during the demand inter- val. Cooling equipment operation is locked out for 5 min- utes af ter a demand has been satisfied. If another cooling demand occurs during this 5?minute interval, the snowflake icon will flash; however, the cooling equipment will not run until the 5?minute delay has elapsed. Adjusting T emperature Setpoint The temperature setpoint represents the desired tempera- ture of the space around the thermostat. T o adjust the setpoint, press the UP or DOWN arrow keys to the right of the display screen. Th e existing setpoint will be displayed just below the actual room temperature as shown in figure 9. Use the UP or DOWN arrow keys to adjust the setpoint up or down.Fan Control The F AN button is located behind the small door on the right-hand side of the thermostat. See figure 3. The F AN button can be used to select either continuous fan mode or auto fan mode. If continuous fan mode is enabled, the fan will run continu- ously regardless of whether the heating or cooling equip- men t is running. Also, ON will be displayed in the F AN box as shown in figure 10. Figure 10 Fan ON with Icon ROOM 73 FA N ON SYSTEM HEA T If auto fan mode is selected, the fan will only run when the heating or cooling equipment is running. In this case, AUT O will be displayed in the F AN box as shown in figure 1 1. Figure 1 1 Fan AUTO with Icon ROOM 73 FA N AUTO SYSTEM HEA T T o c hange f rom c ontinuous t o a uto f an m ode a nd v ice v ersa, press t he F AN b utton. A lso n ote t he p resence o f a f an i con i n the F AN box. This icon indicates that the fan is running. Filter Reminder The 51M33 thermostat includes a filter reminder feature. Th e filter reminder can be set for 1, 3, 6, or 12?month inter- vals. The SETTINGS button, located behind the door on the right?hand side of the thermost at is used to set the filter reminder inte rval. See figure 3. Press the SETTINGS but- ton from the HOME screen to display the Filter Reminder Settings screen as shown in figure 12. Figure 12 Filter Reminder Settings 0 Filter The default setting for the filter reminder is 0, which dis- ables the function. Use the UP arrow while in the Filter R e- minder Settings screen to select the desired interval be- tween reminders. It may be necessary to press the UP arrow several times to access the desired setting. The HOM E screen will reappear about 10 seconds after the ar- row key has been pressed for the final time. Aft er the programmed interval has elapsed, the FIL TER re- minder w ill be displayed as shown in figure 13. After the fil- ter has been changed, reset the filter reminder by pressing the SETTINGS button for 4 seconds. The screen will blink fo r a few moments to indicate that the timer has been reset. The balance point is only available with the out- door sensor. If the optional outdoor sensor (X2658) is connected to the thermostat, ba l ance point adjustment is available. The bal- ance point feature allows the measured outdoor tempera- ture t o govern operation of the heat pump and backup heat source. Us e the SETTINGS button to access the balance point set- ting. If the outdoor sensor is attached to the thermost at, press the SETTINGS button twice to access the Balance Point Settings screen (see figure 14). T o adjust the balance point up or down, press the UP or DOWN arrow keys to the right of the display screen. After the desired balance point is reached, the HOME screen will reappear after about eight seconds. This prevents excessive cycling of the equipment when the outdoor tem- perature is near the balance point. Service Indicator When abnormal equipment operation is detected, the SER VICE indicator will flash on the upper-right corner of the screen. This indicates that the equipment requires ser- vice from a qualified service technician. The SER VICE indi- cator is shown in figure 15. Figure 15 Service Indicator Flashing ROOM 73 SERVICE FA N AUTO SYSTEM HEA T Thermostat RESET Under some abnormal conditions, it may be desirable to re- set the thermostat to its default condition. The RESET but- ton can be used to return the unit to normal operation after an occurrence such as an electrical storm or power out age. The RESET button is an unlabeled, recessed button lo- cated behind the door on the right?hand side of the thermo- stat, just below the SETTINGS button. The RESET button is visible in figure 3. Use a p aper clip or small pencil to press the RESET button. After the RESET button is pressed, the thermostat settings will return to the defaults listed in the Default Settings section. See also Thermostat Output section. Minimum el ap sed time between any compressor activation and the next compressor activation: 6 minutes. NOTE ? All protection timers (except the compressor OFF timer) can be over?ridden if a heating or cooling demand is initiated or terminated using the UP, DOWN, HEA T, or COOL buttons. Equipment Protection Override Both the minimum compressor OFF timer and the mini- mum equipment cycle timer can be over?ridden by press- in g and holding either the HEA T or COOL button down for 4 seconds. When programmed time has elapsed, a FIL TER indicator is dis- played.Af - te r 24 hours of power loss, programmed settings will be lost and replaced with default settings. IMPORT ANT Power must be applied for at least six consecutive hours pr ior to a power loss in order for memory to be ret ained for the specified time. LCD Backlight Activated for 8 seconds when any key is pressed. NOTE ?