Lennox Touch Screen Programmable Communicating Thermostat Thermostat User Manual

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INSTALLER’S SYSTEM SETUP  
GUIDE  
2009 Lennox Industries Inc.  
Dallas, Texas, USA  
icomfortt Thermostat  
Touch Screen Programmable Communicating Thermostat  
CONTROLS  
506052−01  
11/09  
Litho U.S.A.  
Shipping and Packing List1  
1 − icomfortTouch Screen Communicating, 7−day Programmable  
Thermostat  
6 − Mounting Screws  
6 − Wall Anchors  
1 each − Installation Quick-Start Guide, Installer’s System Setup Guide,  
Homeowner’sManual, Warranty card, Warranty Audit tag  
*2P1109*  
*P506052-01*  
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Table of Contents  
WARNING  
icomfortThermostat Terms and Acronyms . . . . . . . . . . . . . . . . .  
icomfortTechnical Description . . . . . . . . . . . . . . . . . . . . . . . . . . .  
icomfortThermostat Features . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Installing icomfortThermostat . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Always turn off power at the main power source by switching the  
circuit breaker to the OFF position before installing or removing  
this thermostat.  
All wiring must conform to local and national building and electri-  
cal codes and ordinances.  
System settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Setting time and date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Add/remove/modify non−communicating devices . . . . . . . . .  
Do not switch system to cool if the outdoor temperature is below  
45°F (7°C). This can damage the cooling system.  
Modify communicating device settings . . . . . . . . . . . . . . . . . . 10  
Indoor air quality controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
CAUTION  
This is a 24VAC low−voltage thermostat. Do not install on volt-  
ages higher than 30VAC.  
Access installer program from User Home screen . . . . . . . . . . . . 22  
Editable parameters table (user and Installer) . . . . . . . . . . . . . . . . 25  
Alarm Codes and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31  
Do not short (jumper) across terminals on the gas valve or at the  
system control to test installation. This will damage the thermo-  
stat and void the warranty.  
IMPORTANT  
Read this manual before programming this thermostat.  
Use this thermostat only as described in this manual.  
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icomfortt Thermostat Terms and Acronyms  
Subnet Controller (SC): (part of the communicating thermostat) Local  
device that controls the system.  
tions, fan motor, and reversing valve and monitors all safety features in  
the unit.  
AC Control: Communicating air conditioning control. AC controls low  
and high speed compressor operation, fan motor operation, and all safe-  
ty monitors in the unit.  
Subnet: A part of the communication network that contains devices to  
control one functional HVAC system.  
RSBus − Residential Serial Bus − the means for transmitting data within  
the communicating system.  
Discharge Air Sensor (DAS): Communicating discharge air sensor.  
Provides discharge air temperature to Bus, UI, and IFC for proper opera-  
tion of equipment.  
Controller Area Network Protocol: Rules for networking, for transmis-  
sion and receipt of information between communicating systems.  
R: 24V power  
Baud Rate: Maximum speed of BUS 40K baud.  
C: 24V common  
i+: + data information connection  
i−: − data information connection  
Byte: 8 bits of information transmitted on the RSBus.  
IntegratedFurnace Control (IFC): Communicating control for furnace.  
IFC controls ignition, CAI, blower, and monitors all safety features in the  
unit.  
Configuration:Function that accrues during setup of system to identify  
other communicating devices. Configuration is also used in setup of a  
variable capacity furnace to properly set furnace parameters.  
Air Handler Control (AHC): Communicating control for air handler  
units. AHC controls operation of blower, heat strips, and monitors all  
safety features in the unit.  
Memory Fault Recall: Method of checking for errors  
Firmware:Software stored on a memory chip instead of being part of a  
program  
HP Control (Defrost Control) (UC): Communicating defrost control.  
UC controls low and high speed compressor operation, defrost opera-  
Software: Programming and applications for computer  
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icomfortt Technical Description  
The 24VAC icomfortthermostat stores system parameters and set-  
tings in a nonvolatile memory (i.e., it retains data when electrical power  
fails or is turned off). The thermostat (see figure 1) also:  
includes on-board help screens,  
Thermostat  
connections  
supports heat pumps or non−heat pump units, with up to 4 stage  
heat / 2 stage compressor operation. (2 stages of heat pump heat-  
ing and 2 stages of auxiliary backup heat are provided. Also, 2  
stages of emergency heat are provided),  
R
I+ I − C  
supports Indoor Air Quality with time-based notification of consum-  
ables including media filters, UVC bulbs, humidifier pads, and  
PureAircatalyst service / replacement,  
supports variable capacity / multistage heat/cool, universal com-  
patibility(gas/electric/heat pump/ac), and is dual fuel capable with  
two balance points.  
Maximum total length  
of all connections on  
the RSBus is limited  
to 1500ft.  
RSBUS  
Minimum wire size is  
18 gauge  
Important  
icomfortOutdoor Units Control  
icomfortFurnace Control  
icomfortAir Handler Control  
Always use correct software version as recommended for replacement  
configuration (discovery).  
External Sensors − outdoor temperature and humidity  
Humidify control  
Dehumidify control  
Connectionsto non communication outdoor units and all accessories is  
describedin the Quick−Start Installation guide. (Wiring diagrams are also  
Figure 1. icomfort thermostat system  
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icomfortt Thermostat Features  
Installing icomfortt thermostat  
Refer to the Quick Start Guide for all the information about installing the  
thermostatto a wall and for wiring diagrams for connecting the thermo-  
stat to the system using one of a number of possible configurations.  
Thermostat Type  
Electronic communicating, color display touch screen, 7−day program-  
mable.  
Supports  
After all the wiring is in place, apply power to the system. 24VAC will be-  
gin to power up the thermostat.  
Humidification Measurement and Control,  
Dew Point Adjustment Control,  
Dehumidification Measurement and Control,  
Continue with the Installer setup that follows.  
®
Humiditrol Enhanced Dehumidification Accessory (EDA),  
Multi-stage HVAC Systems,  
Equipment Maintenance Reminders.  
On-board Help Screens.  
The icomfortthermostat’s autochangeover mode permits control of  
heating, cooling, humidification, and dehumidification without user in-  
volvement.  
Outdoor Temperature Sensor  
Communicatingoutdoor units contain a built in outdoor temperature sen-  
sor.  
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After power is applied to the thermostat for the first time, the processor  
checks the system for installed communicating devices, the ꢀSystem  
ue.  
During the setup process, alerts may pop open to inform the installer  
some item of information that affects the setup (figure 4). Tend to any  
such alerts prior to continuing setup.  
critical alert  
SYSTEM DISCOVERY IN PROGRESS  
Active  
Critical Alert Code: 31  
AIR HANDLER reports:  
Lost Communication with  
THERMOSTAT −  
Figure 2. System discovery  
setup  
HELP  
Latest occurrence: 8/23/09  
1:57 PM  
close  
press for more  
Thermostat 1  
Figure 4. Alert window  
Use this Thermostat?  
press here  
Figure 3. Use this thermostat screen  
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ꢀSystem settingsꢀ (figure5) appear first. As you use the up/down arrows  
to scroll through the settings, the right hand side will show the current  
value, for example, Current Value: (35% ) shows the current setting of  
the Circulate Fan ON time.  
(Make time and date as described on Page 8.) After changes have  
been made, use save to store the changed data or cancel to exit the  
screen and return to the list of settings.  
setup  
HELP  
Daylight Saving Time  
up/down arrows  
scroll through a  
numeric range for  
some settings  
To view/edit a setting,  
highlight it, then press edit.  
system settings  
Enabled  
Time and Date  
Current Value:  
(35%)  
Daylight Saving  
Time  
Disabled  
cancel  
save  
Circulate Fan ON  
time  
edit  
Dealer Name  
Dealer Address  
typewriter tool to input  
names, address, phone  
numbers etc.  
Dealer Phone  
Number  
next step  
back  
Dealer Email  
Dealer Name  
Figure 5. System settings  
The following shows the range/condition and defaults for the settings.  
Lennox Repairman  
1
2
3
4
5
6
7
8
9
0
system setting  
range/condition  
default  
use  
q
w
e
r
t
y
u
i
o
p
Time and Date  
!
@
#
$
%
^
&
(
)
Daylight Saving Time  
Circulate Fan ON Time  
Enabled/Disabled  
15 to 45  
Enabled  
35%  
a
s
d
f
g
h
j
k
l
_
=
+
cancel  
save  
.
*
/
Dealer Name  
Lennox  
z
x
c
v
b
n
m
Dealer Address  
Dealer Phone Number  
Dealer Email  
use type  
writer to  
change  
back  
space  
CAPS  
ON  
(alpha−numeric  
characters)  
symbols  
space  
1−800−9−LENNOX  
Dealer Website  
Figure 6. Settings change tools  
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Setting time and date  
Press other boxes and adjust with the arrows for all time and date  
information. When the date and time is correct, press save to save  
settings and return to previous settings screen.  
Use the arrows to select Time and Date; press edit (see figure 7). Press  
tests  
setup  
HELP  
setup  
HELP  
to adjust a setting, highlight  
it, then press edit.  
Time and Date  
system settings  
Time and Date  
Current Value:  
(September 15, 2009,  
09:23 AM)  
Daylight Saving  
Time  
10 :19  
AM  
Circulate Fan ON  
time  
adjust  
Oct 15 2009  
edit  
Dealer Name  
cancel  
save  
Dealer Address  
Dealer Phone  
Number  
next step  
back  
Dealer Email  
Figure 8. Set current time and date  
Figure 7. View/edit time and date  
NOTE − After setting the time and date, if you don’t need to add any non−  
communicating devices, you may wish to accept the default system pa-  
rameters and skip forward to ꢀtests". To do so, repeatedly press next  
step on each screen until you get to the tests screen. From there, you  
can check the systems operation. Thereafter, should you need to  
change a communicating device parameter, access those settings by  
pressing the equipment tab in the installer section.  
When the ꢀTime and Date" screen appears, enter the correct date as fol-  
lows:  
Press one of the time and date boxes − the text will change to white  
Press the up/down arrows to change the data.  
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Add/remove/modify non−communicating devices  
setup  
HELP  
From this screen (figure 9), use the yes button to access a list of non−  
communicatingdevices for installing or removing. A list similar to that  
shown in figure 10 will appear.  
non−communicating  
device list  
to adjust a setting, highlight it,  
then press edit  
HUMIDIFIER  
Current Value:  
(Not Installed)  
setup  
HELP  
DEHUMIDIFIER  
UV LIGHT  
system devices  
edit  
HP  
XP19−060−230−06  
5809K00015  
Add or Remove  
Non−communicating  
equipment?  
yes  
AIR HANDLER  
CBX32MV−60  
5809K00020  
back  
THERMOSTAT  
49W95  
A109K00139  
Figure 10. Installing UV Light  
A typical Installed status screen (Figure 11) shows if the device is not  
installed or type of equipment installed. Use the arrows to change and  
use save to save the change. (Cancel goes pack to previous screen.)  
back  
next step  
SYSTEM  
Installed Status  
Figure 9. Add/remove/modify non−communicating devices  
Not Installed  
Humidification / Dehumidification Control Modes depend on a hu-  
midifierand/or dehumidifier being added to the system. Therefore, you  
must press yes on the button near "Add or Remove Non−communicating  
equipment?" Also, in order for the user’s display to show these controls,  
UV LIGHT  
cancel  
save  
Use the up/down arrows (see figure 10) to select a setting. The right hand  
side of the screen indicates what is currently selected, for example, Cur-  
rent Value: (Not Installed); press edit if you want to modify that setting.  
Figure 11. Typical non−communicating device edit screen  
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Modify communicating device settings  
setup  
HELP  
Use this screen (figure 12) to access communicating devices’ settings.  
Use back to return to the previous screen or next step to go on.  
to adjust a setting, highlight it,  
then press edit  
HP  
Equipment Name  
setup  
system devices  
HELP  
Compressor Short  
Cycle Delay  
Current Value:  
(Off)  
to adjust a device, highlight  
it, then press edit  
Defrost  
Termination Temp  
HP  
XP19−060−230−06  
5809K00015  
reset  
edit  
Compressor Shift  
Delay On/Off  
about  
AIR HANDLER  
CBX32MV−60  
5809K00020  
edit  
back  
reset ALL  
next step  
THERMOSTAT  
49W95  
A109K00139  
Figure 13. Modify communicating device settings  
SYSTEM  
back  
Settingsavailable for the devices are dependant on the components you  
have. Shown below is an example of changing the compressor shift  
delay on. After using the arrows to select On, press save to save the  
changes and return to the previous screen.  
Figure 12. Accessing communicating device settings  
With one of the devices highlighted, press about, then use arrow keys to  
see a list of data about the selected device. If you select reset ALL, and  
then confirm, ALL devices will be reset to their factory settings. (You  
Compressor Shift Delay On/Off  
With one of the devices in figure 12 highlighted, press edit to go to that  
On  
Off  
cancel  
Use the up/down arrows to scroll through the device’s settings and ob-  
serve the right hand side of the screen (figure 13) to see the current set-  
ting, for example, Current Value: (Off). Press edit if you want to modify  
that setting, or press back to return to the previous screen.  
save  
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If you select reset and then confirm, the highlighted device will be reset  
to its factory setting. You would see a screen similar to figure 14, but ref-  
erencing only the selected device.  
HP  
XP19−060−230−06  
5809K00015  
After a reset, the device which had its settings reset to  
default will display in the system devices screen in red  
type. You will be required to highlight the red−type de-  
vice(s) and use edit (see figure 12) to change, or at  
least view the changed settings of the red−type de-  
vices .  
AIR HANDLER  
CBX32MV−60  
5809K00020  
Resetting ALL devices to their factory default  
settings will cause the system to restart the  
setup process. If you want to continue, then  
press ’confirm’ or press ’cancel’.  
Equipment  
Name  
In the edit mode, the feature list will show the selected  
device’s changed features in red type. Use the up/  
down arrows to select each red−typed feature and  
press edit. Make changes to the settings using the  
Edit tools if desired, or at least, press save in each fea-  
ture screen. Upon saving, the previous screen will  
display and the type will again be black. Press back to  
return the Modify communicating device settings  
screen.  
Electric Heating  
Airflow  
cancel  
confirm  
Low Cooling  
Airflow  
Low Cooling  
Airflow  
Figure 14. Reset device confirmation note  
At this point press next step to advance to the test controls.  
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Indoor air quality controls  
setup  
tests  
equipment  
HELP  
(to adjust a device, highlight  
it, then press edit)  
An example of installing UV Light is shown in figure 10, Page 9.  
system devices  
XP19−060−230−06  
5809K00015  
To turn on humidification or dehumidification controls, in addition to  
the setup described on Page 9, work from either the setup tab or the  
equipment tab to get to the adjustment screen (figure 15). Use the arrows  
to highlight the SYSTEM selection. Press edit.  
AIR HANDLER  
CBX32MV−60  
5809K00020  
about  
edit  
A long list of features are listed on the right of the next screen (see figure  
16). Use the arrows to locate Humidification Control Mode and/or De-  
humidificationControl Mode. Press edit.  
THERMOSTAT  
49W95  
A109K00139  
reset ALL  
next step  
SYSTEM  
49W95  
A109K00139  
back  
Dependingon the type of equipment installed, the lists of options may be  
different than those shown in figure 17. In order for either or both of these  
controls to display, the selected option must be other than ꢀDisplay  
Only".  
Figure 15. Accessing the SYSTEM adjustment screen  
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HUMIDIFICATION modes  
setup  
tests  
equipment  
HELP  
BASIC & PRECISIONꢁthese modes allow user control of RH between  
15 and 45%. These conditions must be met for either mode to operate:  
(to adjust a setting, highlight  
it, then press edit)  
SYSTEM  
humidification mode has been enabled, and  
the unit is in HEAT mode, and  
humidification demand exists (24V present at H), and  
BASIC mode also requires heat demand exists (Y for HP heat, or W for  
gas heat [W may be energized with G de−energized]).  
Equipment Name  
Current Value:  
(Display Only)  
Filter 1 Timer  
Selection  
.
.
(various)  
DEW POINT CONTROLꢁDew point adjustment mode will change the  
humidificationsetpoint based on the outdoor temperature and a user−de-  
fined dew point adjustment setting.  
.
.
edit  
reset  
Dehumidification  
Control Mode  
DEHUMIDIFICATION modes  
InBASIC mode, dehumidification occurs if these conditions are met and  
signals are present at specific terminals:  
Humidification  
Control Mode  
back  
dehumidification has been enabled on installer settings, and  
the unit is in COOL mode, and  
dehumidification demand exists (RH above setpoint), and  
cooling demand exists (Y1 energized).  
Figure 16. SYSTEM adjustment screen  
In PRECISION mode, dehumidification occurs if all BASIC conditions  
are true, except cooling demand may or may not be present. Maximum  
overcool from cooling set point is 2ºF.  
Humidification Control Mode  
Dehumidification Control Mode  
Display Only  
Basic  
Display Only  
Basic  
HUMIDITROL or AUX. DEHUMIDIFIER mode requires:  
outdoor sensor must be installed and setup  
dehumidification has been enabled on installer settings, and  
the unit is in COOL mode, (or if in AUTO, at least one thermostat cooling  
call made prior to the dehumidification demand), and  
Precision  
Precision  
Humiditrol  
(or Auxiliary  
Dehumidifier)  
cancel  
save  
Dew Point Control  
cancel  
a dehumidification demand exists (RH above setpoint), and  
outdoor temp. below 95°F; indoor temp. above 65°F, and  
for HUMIDITROL, Humiditrol comfort adjust parameters as follows:  
save  
MAX adj. − Indoor temp > 2°F above heating setpoint  
HEAT SETPOINT+COOL SETPOINT  
MID adj. − Indoor temp >  
2
Figure 17. Selecting Dehumidification/Humidification mode  
MIN adj. − Indoor temp > 2°F below cooling setpoint  
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Tests − Page 1 of 1  
The tests feature is not available until after setup has been completed  
once. After you press next step in the final setup screen, the ꢀSelect  
tests to run" screen (figure 18) appears.  
When the tests screen opens, TEST ALL will be highlighted (but not yet  
selected).If you want to run TEST ALL, press select. Note your selection  
on the right side says ꢀselected test TEST ALL". Also, note there are now  
two buttons along the bottom labeled remove and start. Use remove to  
deselect a selected test.  
If you re−select the tests tab from any other screen, a message to ꢀpress  
Start button below to begin system testing" appears; press start.  
If you prefer, run tests one−at−a−time using the arrows to highlight a de-  
sired test and then press select.  
press start button below to begin system testing  
Press start to begin testing.  
start  
setup  
tests  
equipment  
HELP  
setup  
tests  
equipment  
HELP  
select tests to run  
select tests to run  
selected tests  
TEST ALL  
TEST ALL  
selected tests  
TEST ALL  
Blower  
Blower  
HP Heat − 1st  
Stage  
HP Heat − 1st  
Stage  
HP Heat − 2nd  
Stage  
select  
HP Heat − 2nd  
Stage  
select  
Defrost Now  
Defrost Now  
Cooling − 1st  
Stage  
Cooling − 1st  
Stage  
remove  
start  
Cooling − 2nd  
Stage  
skip tests  
Cooling − 2nd  
Stage  
alerts  
diagnostics  
EXIT  
alerts  
diagnostics  
EXIT  
Figure 18. Select tests to run  
Figure 19. Start running tests  
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Tests − Page 1 of 1  
After the tests have been started, the screen will describe which test is  
running (see figure 20). After concluding that the results are the desired  
results for any test, press next (if using TEST ALL) to proceed to the next  
test or done (if running a single test).  
After pressing done, the ꢀTesting finished" screen will appear (see figure  
21). At this point, use the EXIT tab (if you are finished with all setup), or  
use diagnostics tab (to analyze the system), or use equipment tab (if  
you wish to make any changes to device details).  
setup  
tests  
equipment  
HELP  
TEST ALL example  
CURRENT TEST: Blower  
The Testing Process is Finished  
Check Blower Operation  
cancel  
next  
single test example  
CURRENT TEST: Blower  
Check Blower Operation  
press the ’tests’ tab to run more tests.  
press the ’EXIT’ tab to start normal operation.  
cancel  
done  
alerts  
diagnostics  
EXIT  
Figure 20. Typical tests results screens  
Figure 21. Testing finished screen  
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Equipment − Page 1 of 1  
This feature allows the installer to edit details of devices in the system  
without having to re−run the setup program. The following appears after  
the equipment tab has been selected  
setup  
tests  
equipment  
HELP  
(to adjust a setting, highlight  
it, then press edit)  
SYSTEM  
press start button below to edit details of devices in  
the system  
Equipment  
Name  
Current Value:  
(System)  
Filter 1 Timer  
Selection  
start  
Filter 2 Timer  
Selection  
You may view information about or modify communicating devices as  
edit  
reset  
UV Bulb Timer  
Selection  
setup  
tests  
equipment  
HELP  
Humidifier Pad  
Timer Selection  
back  
to adjust a device, highlight  
it, then press edit  
system devices  
Figure 23. Equipment details edit  
HP  
XP19−060−230−  
06  
5809K00015  
Table on Page 25 shows a list of Editable Parameters for the currently  
availabledevices designed to communicate in this system. Other de-  
vices and additional parameters may be added at a later date. Check the  
unit installation manuals (i.e. furnace, air handler, heat pump, ac unit) for  
current information and default parameters.  
about  
AIR HANDLER  
CBX32MV−60  
5809K00020  
edit  
reset ALL  
next step  
THERMOSTAT  
49W95  
A109K00139  
back  
SYSTEM  
Figure 22. Equipment details edit  
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Diagnostics − Page 1 of 1  
If you need to run diagnostics to analyze the system, press thediagnos-  
open.  
select type of device to run  
diagnostics on  
run diagnostics on:  
HP  
HP  
XP19−060−230−  
06  
5809K00015  
select device to run  
diagnostics on  
run diagnostics on:  
AIR HANDLER  
CBX32MV−60  
5809K00020  
HP  
XP19−060−230−  
06  
5809K00015  
AIR HANDLER  
CBX32MV−60  
5809K00020  
select  
remove  
start  
diagnostics  
HP  
Diagnostics  
diagnostics  
Line Voltage  
220 volts  
Figure 24. Select device to run diagnostics  
24VAC Voltage  
24 volts  
Use the arrow buttons to scroll through the list of items found on the left of  
the screen. Then press select. The right side of the screen shows which  
item is selected (figure 25). Use start to begin the process. The screen  
will show ꢀDIAGNOSTICS IN PROGRESS..." briefly, then change to  
show the list of values and conditions discovered.  
Y1 − Output  
PSC Fan Relay  
ECM Fan 1  
ECM Fan 2  
Y2 Solenoid  
On  
Closed  
On  
On  
Use the arrow buttons to scroll through the information and take note of  
any found to be out of operating range.  
done  
On  
Pressdone when finished with the information and select another device  
to diagnose or use EXIT if finished.  
Figure 25. Running diagnostics  
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As described earlier on Page 6, alerts may pop up on the screen during  
setup. To view alerts otherwise, press the alerts tab. Up to 10 alerts are  
stored for recall by the technician.  
order of:  
1. critical first (red icon),  
The left side of the main alert screen shows a list of each communicating  
device discovered in the system and includes model and serial number  
information.The up/down arrows allow you to scroll through the list of  
discovered devices. The selected device is shown in bold lettering.  
2. service next (yellow icon).  
If the information in the alert box exceeds the box size, press press for  
more to see the remaining information.  
On the right side of the alert screen, press view active alerts to list all  
active alerts for either SYSTEM ALERTS (lists alerts from all communi-  
cating devices) or a selected device. If there are no alerts, the display will  
show ꢀThere are no new alerts that require service".  
alert description  
active alerts  
Press view cleared alerts to list previously active alerts that were  
cleared by the device or installer. Until at least one alert has been cleared  
by the device or the installer, the display will show ꢀThere are no new  
alerts that require service".  
ALERT 1 of 5  
remind later  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
use the arrows to  
System Devices  
select a device  
clear  
next alert  
EXIT  
SYSTEM ALERTS  
(08:45 PM)  
(4) Occurrences  
view active  
alerts  
HP  
XP19−060−230−06  
5809K00015  
back  
press for more  
AIR HANDLER  
CBX32MV−60  
5809K00020  
view cleared  
alerts  
alerts  
diagnostics  
THERMOSTAT  
49W95  
A109K00139  
Figure 27. Device alert  
alerts  
diagnostics  
EXIT  
Figure 26. System Devices alerts  
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Clearing alerts  
alert description  
set time for next reminder  
Acritical alert (red icon) identifies a system or device issue that can pre-  
vent the system from working properly or at all, and if allowed to run,  
could cause damage to the system. The issue raised by the alert must  
be addressed before clearing the alert.  
disabled  
ALERT 1 of 5  
3 months  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
6 months  
select  
12 months  
24 months  
custom time  
Press clear (see figure 27) to request  
press ’confirm’ to clear the  
alert, or press ’cancel  
clearing of a critical alert; then confirm  
the request (shown to the right). The de-  
vice will respond to the request indicating  
whether or not the alert can be cleared at  
that time. If it cannot be cleared, revisit  
the alert issue and make repairs accord-  
ingly.  
(08:45 PM)  
(4) Occurrences  
set  
cancel  
confirm  
cancel  
press for more  
Figure 28. Set new alert date  
After selecting a time period using either method and pressing set, the  
The edit date option is not available for a critical alert.  
A service alert (yellow icon) reminds users to service filters, humidifier  
pad, UV light and PureAirAir Purification system.  
alert description  
Press clear (see figure 27) to request  
the alert was cleared and  
moved to alert history.  
please press ’done’ to  
return to the list of  
active alerts.  
ALERT 1 of 5  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
clearing of a service alert. If you answer  
no to the ꢀwas action taken" screen  
(shown to the right), the alert reappears  
and is not cleared. Action must be taken,  
either to perform the maintenance re-  
quired, or instead of clearing, you may  
edit the time to again be reminded (de-  
scribed later).  
was action taken?  
yes  
no  
(08:45 PM)  
(4) Occurrences  
done  
press for more  
If you press yes to ’was action taken?’, the ꢀSet new alert date" screen  
(figure 28) appears. You may chose from the list of options or set a cus-  
Figure 29. Cleared alert confirmation  
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Using ꢀcustom time"  
set time for next reminder  
alert description  
ALERT 1 of 5  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
time for the reminder to appear. Press in one of the boxes to highlight it  
and use the up/down arrows to change the value in that box. Repeat for  
all boxes. When desired reminder is displayed, press set.  
1 day  
1 week  
1 month  
select  
3 months  
custom time  
(08:45 PM)  
(4) Occurrences  
alert description  
set time for next reminder  
set  
cancel  
10  
12  
19  
AM  
press for more  
ALERT 1 of 5  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
19 2009  
Figure 31. Remind later options  
After selecting a reminder time using the listed options or a custom time,  
press set; the ꢀRemind later confirmation" screen appears (see figure  
32).  
set  
(08:45 PM)  
(4) Occurrences  
alert description  
cancel  
press for more  
remind later  
ALERT 1 of 5  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
set for:  
Figure 30. Setting custom time  
Using ꢀremind later"  
1/19/10 9:49AM  
done  
(08:45 PM)  
(4) Occurrences  
You may chose remind later and select from ꢀRemind later options" list  
Figure 32. Remind later confirmation  
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View cleared alerts  
A history of cleared alerts allows the installer to review the cleared alerts.  
This information can help diagnose problems. Use the arrows to (figure  
34) select either SYSTEM ALERTS or a devicefrom the list (see figure  
34) and press view cleared alerts. Then scroll through the alerts using  
next alert (see figure 34). The back button returns to the system devices  
alerts screen.  
If no alert or only one alert is present in the history of cleared alerts, only  
the back button appears. If no alerts are present in the system or de-  
vice’s history, a message will state that ꢀThere are no new alerts that re-  
quire service".  
alert description  
history  
use the arrows to  
System Devices  
select a device  
SYSTEM ALERTS  
ALERT 1 of 5  
view active  
(Service) Alert Code − (0)  
(Thermostat) reports:  
(Replace Filter 1)  
Latest Occurrence  
(04/03/09)  
HP  
XP19−060−230−06  
5809K00015  
alerts  
AIR HANDLER  
CBX32MV−60  
5809K00020  
(08:45 PM)  
(4) Occurrences  
view cleared  
alerts  
THERMOSTAT  
49W95  
A109K00139  
next alert  
EXIT  
back  
alerts  
diagnostics  
alerts  
diagnostics  
EXIT  
Figure 33. System Devices alerts  
Figure 34. History display  
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To access the installer program after the unit has been placed in opera-  
tion and the user home screen is displayed, press the ꢀLennox" logo and  
hold for 5 seconds (see figure 35). The system will access the installer  
screens.  
Figure 36, ꢀQualified Lennox equipment installer warning" screen ap-  
pears; press yes to proceed (no returns the home screen).  
WARNING  
The following screens are intended for use by  
qualified Lennox equipment installers only.  
Do you want to proceed?  
yes  
no  
Figure 36. Qualified Lennox equipment installer warning  
When you press yes, the thermostat’s processor will search for commu-  
nicating devices in the system. The next display will be a summary of all  
alerts detected.  
After initial installation, if an alert is present when you are making  
changes to settings, no action on the alert is mandatory.  
Figure 35. Enter installation setup mode from home screen  
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To begin reconfiguring a system, press the setup tab.  
Press confirm to continue system configuration; the screen will change  
to the system discovery screen.  
The ꢀStart system configuration" screen (figure 37) appears; press start  
to proceed.  
setup  
tests  
equipment  
HELP  
tests  
equipment  
setup  
tests  
HELP  
configuring the system may affect some device settings.  
confirm to continue, or press cancel  
press start button below only if you wish to setup a  
new system, or to re−setup an existing system  
confirm  
cancel  
start  
back  
Figure 38. Re−configure confirmation  
Figure 37. Start system configuration  
If this is the first attempt to configure a system, the screen will change to  
the system discovery screen.  
SYSTEM DISCOVERY IN PROGRESS  
attempts to RE−CONFIGURE the system. It is a reminder that system  
configuration may affect some existing device settings and prompts to  
Figure 39. System discovery  
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Whilereconfiguring, the thermostat will have retained settings from the  
previous configuration. If a device has been replaced and re−configura-  
tion has detected its replacement device, it will know the original device  
Figure41 lists all communicating devices found and gives you an oppor-  
tunity to review the reconfigured devices. Use the arrow buttons to scroll  
through the list of items found on the left of the screen. Press about to  
highlightan option on the right side of the screen and view details about  
that device. If necessary, change SYSTEM settings as described on  
If this is the initial configuration, the ꢀCompatible device found" screen  
does not appear.  
setup  
HELP  
setup  
system devices  
HELP  
view/ edit selected device’s  
settings  
Missing  
(DEVICE ETN)  
Found Compatible  
(DEVICE ETN)  
HP  
XP19−060−230−  
06  
5809c00015  
Model No.(control model no.)  
Serial No. (control serial no.)  
Model No.(control model no.)  
Serial No. (control serial no.)  
about  
AIR HANDLER  
CBX32MV−60  
5809B00020  
edit  
reset all  
Settings were not copied  
THERMOSTAT  
49W95  
A109B00139  
next  
next step  
back  
SYSTEM  
Figure 40. Compatible device found  
Press next to accept the device and write the thermostat’s settings from  
the previous configuration to the found compatible device. The display  
changes to ꢀSettings were copied". Press next to advance to the next  
screen.  
Figure 41. System devices screen  
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Editable Parameters Table (User and Installer)  
Parameter Name:  
Default  
Parameter Value Setting  
Increment  
Installer settings  
Time and Date  
(Time/date elements screen)  
1%  
Daylight Saving Time  
Enabled  
Enabled, Disabled  
Circulate Fan − Percentage of Time ON  
Dealer Contact Information – Name  
Dealer Contact Information – Address  
Dealer Contact Information – Phone  
Dealer Contact Information – Email  
Dealer Contact Information – Website  
SYSTEM  
35%  
15 to 45%  
Lennox  
(Typewriter input screen)  
(Typewriter input screen)  
(Typewriter input screen)  
(Typewriter input screen)  
(Typewriter input screen)  
1−800−9−LENNOX  
Equipment Name  
(Typewriter input screen)  
Calendar Time, Run Time  
Calendar Time, Run Time  
Calendar Time, Run Time  
Calendar Time, Run Time  
Calendar Time, Run Time  
Enabled, Disabled  
Standard, Even Heat  
Staged, Modulating  
3 to 9ºF  
Filter 1 Timer Selection  
Calendar Time  
Calendar Time  
Calendar Time  
Calendar Time  
Calendar Time  
Disabled  
Filter 2 Timer Selection  
Humidifier Pad Timer Selection  
UV Bulb Timer Selection  
PureAir Timer Selection  
Smooth Setback Recovery  
Electric Heat Control Mode  
Gas Heat Control Mode  
Standard  
Modulating  
5ºF  
Autochangeover Temp Deadband  
Max Heat Setpoint  
1ºF  
1ºF  
1ºF  
90ºF  
40 to 90ºF  
Min Cool Setpoint  
60ºF  
60 to 99ºF  
Heat/Cool Stages Locked In  
Disabled  
Enabled, Disabled  
table continued on next page  
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Parameter Name:  
Default  
Parameter Value Setting  
Increment  
1st Stage Differential  
0.5ºF  
1.5ºF  
0.5 to 3ºF  
.5ºF  
.5ºF  
.5ºF  
.5ºF  
.5ºF  
.5ºF  
2nd Stage Differential  
0.5 to 8ºF  
0.5 to 8ºF  
3rd Stage Differential  
2.0ºF  
4th Stage Differential  
2.5ºF  
0.5 to 8ºF  
5th Stage Differential  
3.0ºF  
0.5 to 8ºF  
6th Stage Differential  
3.5ºF  
0.5 to 8ºF  
Stage Delay Timers  
Enabled  
20 Minutes  
20 Minutes  
20 Minutes  
20 Minutes  
20 Minutes  
Off  
Enabled, Disabled  
5 to 120 Minutes  
5 to 120 Minutes  
5 to 120 Minutes  
5 to 120 Minutes  
5 to 120 Minutes  
Off, 40F (4C), 45F (7C), 50F (10C), 55F (13C),  
Enabled, Disabled  
50 to 60ºF  
2nd Stage Delay  
5 Min  
5 Min  
5 Min  
5 Min  
5 Min  
3rd Stage Delay  
4th Stage Delay  
5thStage Delay  
6th Stage Delay  
Locked in 2nd Stage HP by Outdoor Temp  
Balance Point Control  
Defrost Target Discharge Temp  
Dehumidification Control Mode  
Humidification Control Mode  
Autochangeover Humidification Deadband  
Max Humidification Setpoint  
Max Dehumidification Setpoint  
OK/Humid Boundary  
Disabled  
55ºF  
1ºF  
Display Only  
Display Only  
5%  
Display Only, Basic, Precision  
Display Only, Basic, Precision, Dew Point Control  
5 to 10%  
1ºF  
45%  
15 to 45%  
1ºF  
40%  
40 to 60%  
1ºF  
50%  
45 to 60%  
1ºF  
table continued on next page  
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Parameter Name:  
Default  
Parameter Value Setting  
(Typewriter input screen)  
Increment  
AIR HANDLER  
Equipment Name  
Air Handler  
Electric Heating Airflow  
Low Cooling Airflow  
High Cooling Airflow  
5CFM  
5CFM  
5CFM  
nnnn CFM  
SEE NOTE −.  
NOTE: CFM Default and Values Settings are dependent on the tonnage of the unit  
1: No Delays,  
2: ON: No delays; OFF: 45 sec delay  
3: ON: 82%/7.5min; OFF: No delays  
4: ON: 50%/30s,82%/7.5min; OFF:50%/30s  
Cooling Airflow Profile  
1
Low Heating Airflow  
5CFM  
5CFM  
10CFM  
10CFM  
1%  
High Heating Airflow  
nnnn CFM  
SEE NOTE −.  
NOTE: CFM Default and Values Settings are dependent on the tonnage of the unit  
Continuous Indoor Blower Airflow  
Humidification Airflow  
Dehumidification Airflow  
Heating Indoor Blower OFF Delay  
Heating Indoor Blower ON Delay  
Cooling Indoor Blower OFF Delay  
Cooling Indoor Blower ON Delay  
HP Indoor Blower OFF Delay  
HP Indoor Blower ON Delay  
THERMOSTAT  
70%  
10 sec  
0 sec  
0 sec  
2 sec  
45 sec  
0 sec  
60 to 80% (percentage of reduction of High Cooling Airflow)  
0 to 10 Seconds  
0 to 5 Seconds  
0 to 30 Seconds  
0 to 10 Seconds  
0 to 60 Seconds  
0 to 30 Seconds  
1 sec  
1 sec  
2 sec  
1 sec  
5 sec  
5 sec  
Equipment Name  
(Typewriter input screen)  
−5ºF to 5ºF  
1ºF  
Temp Reading Calibration  
Humidity Reading Calibration  
0ºF  
0%  
−10 to 10%  
1%RH  
OUTDOOR EQUIPMENT  
Equipment Name (HP and AC)  
Outdoor Unit  
300 Seconds  
On  
(Typewriter input screen = up to 35 characters in string)  
60 Sec  
Compressor Short Cycle Delay (HP and AC)  
Compressor Shift Delay On/Off (HP only)  
Defrost Termination Temp (HP only)  
60 to 300 Seconds  
On, Off  
50ºF  
50 to 100ºF  
10ºF  
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Value  
Min.  
Default  
Max.  
Incr.  
Parameter Name  
FURNACE  
Dependency  
Note  
Heating indoor blower OFF delay  
Heating indoor blower ON delay  
Cooling indoor blower OFF delay  
Cooling indoor Blower ON Delay  
Heat pump indoor blower OFF delay  
Heat pump indoor blower ON delay  
DIP SW  
60  
15  
0
180  
45  
30  
10  
60  
30  
10  
5
None  
None  
DIP switch setting in Non−comm.  
45 sec fixed in Non−Comm. IFC  
Not used on Non Com. IFC  
2 sec fixed in Non−Comm. IFC  
Not used on Non Com. IFC  
Not used on Non Com. IFC  
45  
0
2
Outdoor Unit present  
Outdoor Unit present  
Heat Pump present  
Heat Pump present  
2
0
1
45  
0
0
5
0
5
Gas Heat Airflow Setting  
Heating Airflow Control Type  
0 – Fixed CFM  
DIP SW  
0
1
1
DATS installed  
0 – Text ID 0x000E (Fixed CFM)  
1 – Text ID 0x000F (Fixed DAT)  
Low Heating Airflow (CFM @ 40% heat)  
325  
500  
425  
625  
750  
800  
925  
1025  
1350  
1500  
110  
110  
110  
110  
110  
120  
130  
120  
120  
125  
450  
675  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
5
Heating Airflow Control Type = 0  
70,000 BTU; 1/2 HP fan  
90,000 BTU; 1/2 HP fan  
90,000 BTU; 1HP fan  
110,000 BTU; 1 HP fan  
135,000 BTU; 1HP fan  
70,000 BTU; 1/2 HP fan  
90,000 BTU; 1/2 HP fan  
90,000 BTU; 1HP fan  
110,000 BTU; 1 HP fan  
135,000 BTU; 1HP fan  
70,000 BTU; 1/2 HP fan  
90,000 BTU; 1/2 HP fan  
90,000 BTU; 1HP fan  
110,000 BTU; 1 HP fan  
135,000 BTU; 1HP fan  
70,000 BTU; 1/2 HP fan  
90,000 BTU; 1/2 HP fan  
90,000 BTU; 1HP fan  
110,000 BTU; 1 HP fan  
135,000 BTU; 1HP fan  
625  
875  
1025  
1100  
1250  
1425  
1850  
2050  
140  
High Heating Airflow (CFM @ 100%  
heat)  
DIP SW  
DIP SW*  
DIP SW*  
Heating Airflow Control Type = 0  
Heating Airflow Control Type = 1  
Heating Airflow Control Type = 1  
Low Heating Discharge Air Temperature  
(DAT @ 40% heat)  
140  
5
140  
5
140  
5
140  
5
High Heating Discharge Air Tempera-  
ture (DAT @ 100% heat)  
150  
5
160  
5
150  
5
150  
5
155  
5
* − Default DAT value is rounded to the closest number on 5 deg F resolution and limited by Minimum and Maximum value.  
table continued on next page  
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Value  
Min.  
Default  
Max.  
Incr.  
Parameter Name  
Dependency  
Note  
Cooling Airflow Setting  
High Cooling Airflow  
(CFM @ 100% cool)  
OU tons (OUNC) *  
400CFM  
Min CFM  
Min CFM  
Min CFM  
Min CFM  
0
Max CFM  
Max CFM  
Max CFM  
Max CFM  
3
25  
25  
25  
25  
1
Outdoor Unit present  
1/2 HP blower  
1 HP blower  
1/2 HP blower  
1 HP blower  
Low Cooling Airflow  
(CFM @ lowest cool stage)  
See Note1 below  
2+ stage Outdoor Unit present  
Outdoor Unit present  
Airflow Profile − Cooling  
DIP SW  
0–Text ID 0x0105  
(A:ON:50%/30s,82%/7.5min  
OFF:50%/30s)  
1–Text ID 0x0106 (B:ON:82%/7.5min;  
OFF: No delays)  
2–Text ID 0x0107 (C:ON: No delays;  
OFF: 45sec delay)  
3–Text ID 0x0108 (D:No delays)  
Heat Pump Airflow Setting  
High Heat Pump Airflow (CFM @  
100%)  
OU tons (OUNC) *  
400CFM  
Min CFM  
Min CFM  
Min CFM  
Min CFM  
Max CFM  
Max CFM  
Max CFM  
Max CFM  
25  
25  
25  
25  
Heat Pump present  
1/2 HP blower  
1 HP blower  
1/2 HP blower  
1 HP blower  
Low Heat Pump Airflow (CFM @ lowest  
stage)  
See Note 2 below  
2+ stage Heat Pump present  
Other Parameters  
Equipment Name  
Furnace  
N/A  
N/A  
N/A  
25  
None  
None  
Up to 35 characters  
1/2 HP blower  
Continuous Indoor Blower Airflow  
DIP SW (See  
Note 3)  
Min CFM  
Min CFM  
Min CFM  
Min CFM  
Max CFM  
Max CFM  
Max CFM  
Max CFM  
25  
1 HP blower  
Humidification Airflow  
Same as above  
25  
Humidifier present  
1/2 HP blower  
25  
1 HP blower  
Dehumidification Airflow Percentage  
140  
(=70%)  
120  
(=60%)  
160  
(=80%)  
2
(=1%)  
OU present AND SC algorithm support  
Percent of High Cooling Airflow  
Note 1: Minimum Outdoor Unit Cooling Stage as a percentage of High Cooling Airflow (value is rounded up to the closest number on 25 CFM resolution  
Note 2: Minimum Outdoor Unit Heating Stage as a percentage of High Heat Pump Airflow (value is rounded up to the closest number on 25 CFM resolution).  
Note 3: All communicating Installer Parameters default CFM values based on DIP switch setting (non−communicating value) are calculated using the CFM conversion tables and  
rounded up to closest number on 25 CFM resolution.  
Note 4: Parameter dependency − Certain parameters are dependent on others and may not be shown on the display.  
Note 5: Default Values − Jumper/DIP switches impact the default value of some parameters.  
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Parameter Name:  
Default  
Parameter Value Setting  
Increment  
User settings  
Time and Date  
Enabled  
35%  
(Time/date elements screen)  
Daylight Saving Time  
Circulate Fan − Percentage of Time ON  
Dealer Contact Information – Name  
Dealer Contact Information – Address  
Dealer Contact Information – Phone  
Dealer Contact Information – Email  
Dealer Contact Information – Website  
Language Displayed  
Enabled, Disabled  
15 to 45%  
1%  
Lennox  
(Typewriter input screen)  
(Typewriter input screen)  
1−800−9−LENNOX  
(Typewriter input screen)  
(Typewriter input screen)  
English  
(Typewriter input screen)  
English  
Temperature Display Scale  
Clock Format  
(F)  
(F) Fahrenheit, (C) Celsius  
12H  
12 Hour, 24 Hour  
Screen Lock−out  
Unlocked  
Always On  
100%  
Unlocked, Partially Locked, Fully Locked  
Power Save, Always On  
Backlight Setting  
Backlight Intensity  
20 to 100%  
20%  
Outdoor Temp Display  
Indoor Humidity Display  
Filter 1 Timer  
Disabled  
Enabled  
Disabled  
Disabled  
Disabled  
Disabled  
Disabled  
Disabled  
Disabled, Enabled  
Disabled, Enabled  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Disabled, 3 Months, 6 Months, 12 Months, 24 Months, Custom Time  
Filter 1 Timer  
Humidifier Pad Timer  
UV Bulb Timer  
Maintenance Timer  
PureAir Timer  
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Alarm Codes and Troubleshooting  
Alarm ID  
Message Name  
Action required to Clear/Recover  
10  
Unknown Device Detected − DEVICE2  
Reconfigure the system. Press and hold Lennox Logo, press setup tab, press start, and press confirm. If still  
persists, then check all DEVICE connections to make sure they are icomfort compatible.  
11  
Missing DEVICE2  
Check all connections and cycle system power. If problem persists, then reconfigure the system (procedure  
mentioned above).  
12  
14  
Incomplete System  
Thermostat did not find an Indoor Unit. Check connections and cycle power. Replace board if no response.  
Too Many Devices of the Same Type  
Thermostat found more than one outdoor unit, or more than 1 indoor unit, or more than 1 thermostat connected  
to the system. Check wiring and remove duplicate equipment.  
18  
19  
Low Ambient HP Heat Lockout  
Notification only − Outdoor Temp is below the Low Balance Point. HP will not be used to service a Heating Call.  
High Ambient Auxiliary Heat Lockout  
Notification only − Outdoor Temp is above the High Balance Point. Indoor Unit (Furnace or Electric Heat) will not  
be used to service a Heating Call.  
29  
Over Temperature Protection  
Indoor Temp went above 99ºF during a heating or cooling call. Heating is not allowed. Check that Thermostat  
Sensor is accurate. Check that Heating Equipment is not stuck ON (reversing value, etc.). Select system mode  
to cooling to try and cool the indoor space.  
30  
31  
32  
Low Temperature Protection  
Indoor Temp went below 40ºF. Cooling is not allowed. Check that cooling equipment is not stuck ON. Check  
accuracy of the thermostat temperature. Try to heat the space to above 40ºF.  
Lost Communication with DEVICE2  
Asynchronous Reset DEVICE2  
DEVICE2 is not communicating to the thermostat for more than 3 minutes. Check connections if fault persists,  
then cycle power.  
DEVICE2 is resetting by itself. Check power connections, and check 24VAC voltage at DEVICE. The alarm is  
only cleared by pressing the clear button on the Installer Alerts Tab. If fault persists after checking connections,  
replace board.  
34  
Must Program Unit Capacity for DEVICE2  
DEVICE2 is missing the programmed unit capacity. Go to DEVICE2 and program unit capacity manually. See  
unit IOM for instructions.  
35  
Incorrect Operation of DEVICE2  
Communication Problem  
DEVICE2 did not follow the command of the thermostat. Check connections and cycle power.  
105  
Equipment is unable to communicate. Check for miswired and/or loose connections and check for a high volt-  
age source of noise close to the system (welder etc.).  
110  
113  
114  
115  
116  
120  
124  
Low AC Line Voltage  
Line Voltage Low (Voltage lower than nameplate rating). Check voltage.  
Line Voltage High (Voltage higher than nameplate rating). Check voltage.  
No 60 Hertz Power (Check voltage and frequency).  
High AC Line Voltage  
AC Line Frequency/Distortion Problem  
Low Secondary (24VAC) Voltage  
High Secondary (24VAC) Voltage  
Unresponsive DEVICE2  
24 Voltage Low (Range is 18 and 30 volts ). Check voltage.  
24 Voltage High (Range is 18 and 30 volts ). Check voltage.  
Usually caused by delay in outdoor unit responding to indoor unit poling recycle power, check wiring.  
Equipment lost communication with the thermostat. Check connections and cycle power on the thermostat.  
Active Subnet Controller Missing  
table continued on next page  
Page 31  
icomfortTouch Screen 7−Day Programmable Thermostat  
 
href="
Alarm Codes and Troubleshooting  
Alarm ID  
Message Name  
Action required to Clear/Recover  
125  
Control Hardware Problem  
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is  
persistent.  
126  
Control Internal Communication Problem  
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is  
persistent.  
130  
131  
132  
Configuration Jumper Missing  
Corrupted Control Parameters  
Configuration jumper(s) missing on control board (applicable in non−communication only).  
Reconfigure the system. Replace board if service (heating cooling) is not viable.  
Failed Flash CRC Check (Check Sum) Software  
is corrupted.  
Recycle power, if re−occurs replace control.  
180  
Outdoor Temperature Sensor Problem  
Compare outdoor sensor resistance to temperature/resistance charts in installation instructions. Replace if  
necessary.  
200  
201  
202  
Rollout Limit Switch Open  
Correct unit cause of rollout trip or replace flame rollout switch and test furnace operation.  
Indoor blower communication failure including power outage. Check wiring to motor.  
Indoor Blower Motor Problem  
ID Blower Motor & Unit Size Mismatch  
Incorrect appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air  
Handler on configuration guide or in installation instructions.  
203  
Invalid Unit Code  
No appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air  
Handler on configuration guide or in installation instructions.  
204  
205  
207  
Gas Valve Problem  
Check operation and wiring of gas valve.  
Gas Valve Relay Contact Closed  
HSI Sensed Open  
Check wiring to relay; if wiring is correct, replace relay.  
Measure resistance of Hot Surface Ignition ignitor. Replace if open or not within specification range found in  
IOM.  
223  
224  
225  
226  
227  
Low Pressure Switch Open  
Check inches of water column closing pressure of low pressure switch on heat call, measure inches of water  
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.  
Low Pressure Switch Stuck Closed  
High Pressure Switch Failed to Close  
High Pressure Switch Stuck Closed  
Low Pressure Switch Open in Run Mode  
Check operation of low pressure switch for stuck closed on heat call, measure inches of water column of oper-  
ating pressure, inspect vent and combustion air inducer for correct operation and restriction.  
Check inches of water column closing pressure of high pressure switch on heat call, measure inches of water  
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.  
Check operation of high pressure switch for closing on heat call, measure inches of water column of operating  
pressure, inspect vent and combustion air inducer for correct operation and restriction.  
Check inches of water column closing pressure of low pressure switch on heat call, measure inches of water  
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.  
228  
240  
Inducer/Pressure Switch Calibration Failure  
Low Flame Current − Run Mode  
Unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.  
Check micro amperes of flame sensor in board diagnostics or field installed mode; clean or replace sensor.  
Measure voltage of neutral to ground for good unit ground.  
table continued on next page  
Page 32  
506052−01 11/09  
href="
Alarm Codes and Troubleshooting  
Alarm ID  
Message Name  
Action required to Clear/Recover  
241  
250  
252  
270  
271  
Flame Out of Sequence − Still Present  
Primary Limit Switch Open  
Shut off gas, check for gas valve leak.  
Check firing rate on furnace, blockage in heater, and air flow.  
Check temperature rise, air flow and input rate.  
Discharge Air Temperature High  
Watch Guard − Flame Failure on Ignite  
Watch Guard − Low Pressure Switch Open  
Check for gas flow, ignitor lighting burner, flame sensor current.  
Check inches of water column closing pressure of low pressure switch on heat call, measure inches of water  
column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.  
272  
Watch Guard − Low Pressure Switch Open Run  
Mode  
Check operation of low pressure switch for stuck closed on heat call, measure inches of water column of oper-  
ating pressure, inspect vent and combustion air inducer for correct operation and restriction. Check inches of  
water column closing pressure of high pressure switch on heat call, measure inches of water column of operat-  
ing pressure, inspect vent and combustion air inducer for correct operation and restriction.  
273  
Watch Guard − Flame Fail in Run Mode  
Watch Guard − Primary Limit Switch Open  
Check micro amperes of flame sensor in board diagnostics or field installed mode; clean or replace sensor.  
Measure voltage of neutral to ground for good unit ground.  
274  
275  
Check why limit is tripping, over fired, low air flow.  
Shut off gas, check for gas valve leak.  
Watch Guard − Flame Out of Sequence. No  
Flame  
276  
290  
Watch Guard − Calibration Failure  
Ignition Circuit Problem  
Unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.  
Measure resistance of Hot Surface Ignition ignitor, replace if open or not within specification; otherwise replace  
control.  
291  
292  
Heat Airflow Restricted Below Min.  
Indoor Blower Motor Start Problem  
Check for dirty filter, unit air flow restriction, blower performance.  
Indoor blower motor unable to start (seized bearing, stuck wheel, etc.). Replace motor or wheel if assembly  
does not operate or meet performance.  
294  
295  
Inducer Motor Over current  
Check combustion blower bearings, wiring, amps. Replace if does not operate or meets performance.  
Indoor Blower Over Temperature  
Indoor blower motor over temperature (motor tripped on internal protector). Check motor bearings, amps; re-  
place if necessary.  
310  
311  
312  
Discharge Air Sensor Problem  
Compare outdoor sensor resistance to temperature/resistance charts in installation instructions. Replace sensor  
if necessary.  
Heat Rate Reduced to Match Airflow  
Reduced Airflow − Indoor Blower Cutback  
Furnace blower in cutback mode due to restricted airflow. Check filter and ductwork. To clear, replace filter if  
needed or repair/add ductwork.  
Restricted airflow − Indoor blower is running at a reduced CFM (Cutback Mode − The variable speed motor has  
pre−set speed and torque limiters to protect the motor from damage caused by operating out of its designed  
parameters (0 to 0.8" w.g. total external static pressure). Check filter and ductwork. To clear, replace filter if  
needed or repair/add ductwork.  
table continued on next page  
Page 33  
icomfortTouch Screen 7−Day Programmable Thermostat  
href="
Alarm Codes and Troubleshooting  
Alarm ID  
Message Name  
Action required to Clear/Recover  
313  
Indoor/Outdoor Unit Capacity Mismatch  
Incorrect indoor/outdoor capacity code selected. Check for proper configuring in installation instructions. Alarm  
is just a warning. The system will operate, but might not meet efficiency and capacity parameters and alarm  
would clear when commissioning is exited.  
345  
346  
Relay O Failure  
O relay / Stage 1 failed (Pilot relay contacts did not close or the relay coil did not energize),  
HP Jumper not Removed  
Configuration jumper(s) not removed on control board cut O−R. Applicable with non communicating outdoor unit  
with communicating indoor system.  
347  
348  
349  
350  
Relay Y1 Failure  
Y1 relay / Stage 1 failed (Pilot relay contacts did not close or the relay coil did not energize),  
Y2 relay / Stage 2 failed (Pilot relay contacts did not close or the relay coil did not energize),  
Configuration link R to O needs to restored Applicable in non communicating mode,  
Relay Y2 Failure  
IFC Error Check Jumper O to R  
Electric Heat not Configured  
Heat call with no configured or mis−configured electric heat. Check for proper configuring under Configuring  
Electric Heat Stages in the air handler installation instructions.  
351  
Electric Heat Stage 1 Problem  
Heat section / Stage 1 failed (Pilot relay contacts did not close or the relay coil in the electric heat section did  
not energize).  
352  
353  
354  
355  
400  
Electric Heat Stage 2 Problem  
Electric Heat Stage 3 Problem  
Electric Heat Stage 4 Problem  
Electric Heat Stage 5 Problem  
LSOM Compressor Internal Overload Tripped  
Heat section / Stage 2 failed (Same as Code 351).  
Heat section / Stage 3 failed (Same as Code 351).  
Heat section / Stage 4 failed (Same as Code 351).  
Heat section / Stage 5 failed (Same as Code 351).  
Compressor protector is open. Check for high head pressure, check compressor supply voltage.  
Outdoor unit power disconnect is open.  
Compressor circuit breaker or fuse(s) is open.  
Broken wire or connector is not making contact.  
Low or high pressure switch open if present in the system.  
Compressor contactor has failed to close.  
401  
402  
403  
404  
405  
406  
407  
408  
409  
LSOM Compressor Long Run Cycle  
LSOM Outdoor Unit System Pressure Trip  
LSOM Compressor Short−Cycling  
LSOM Compressor Rotor Locked  
LSOM Compressor Open Circuit  
Compressor ran over 18 hours on one room thermostat demand.  
Outdoor unit pressure trip. Check dirty coil, fan motor, refrigerant charge.  
Compressor short cycling (Running less than 4 minutes).  
Check capacitor, wiring, hard−start kit, replace compressor.  
Check compressor for hot (cool down), check pressures, fan motor etc. Replace compressor if unable to get  
circuit to close and compressor to operate.  
LSOM Compressor Open Start Circuit  
LSOM Compressor Open Run Circuit  
LSOM Compressor Contactor Welded  
LSOM Compressor Voltage Low  
Replace contactor.  
Check power to unit.  
table continued on next page  
Page 34  
506052−01 11/09  
href="
Alarm Codes and Troubleshooting  
Alarm ID  
Message Name  
Action required to Clear/Recover  
410  
411  
Open Low Pressure Switch  
Remove any blockages or restrictions from indoor coils and/or fans. Check refrigerant charge and system operation.  
Low Pressure Switch Strikes Lockout  
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test  
mode or resetting low voltage power.  
412  
413  
Open High Pressure Switch  
Check system operating pressures and compare to unit charging charts.  
High Pressure Switch Strikes Lockout  
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test  
mode or resetting low voltage power.  
414  
415  
High Discharge Line Temperature  
Check system operating pressures and compare to unit charging charts.  
High Discharge Line Temperature Strikes Lock-  
out  
Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test  
mode or resetting low voltage power.  
416  
417  
Outdoor Coil Sensor Faulty  
Sensor being detected open or shorted or out of temperature range. Board will not perform demand or time/tem-  
perature defrost operation. (System will still heat or cool).  
Discharge Sensor Faulty  
The board detects open sensor or out of temperature sensor range. This fault is detected by allowing the unit to  
run for 90 seconds before checking sensor resistance. If the sensor resistances not within range after 90 sec-  
onds, the board will count one fault. After 5 faults, the board will lockout.  
418  
419  
420  
421  
530  
531  
532  
594  
700  
701  
702  
703  
704  
705  
W Output Hardware Fault  
Replace the control board.  
W Output Hardware Fault Lockout  
Defrost Out of Control  
Defrost longer than 20 minutes. Check HP operation.  
Check and correct the wiring.  
W External Miswire Alarm  
Damper End Switch Failed to Close  
Damper End Switch Failed to Open  
Damper Control Module Alarm  
Repair/replace damper.  
Repair/replace damper.  
Check/replace if needed.  
Discharge Air Temperature Sensor Problem  
Comfort Sensor Temperature Sensor Problem  
Comfort Sensor Temperature Too High  
Comfort Sensor Temperature Too Low  
Comfort Sensor Humidity Sensor Problem  
Comfort Sensor Humidity Too High  
Comfort Sensor Humidity Too Low  
Check wiring. Ohm out sensor and check to temperature/resistance chart.  
Recalibrate stat to clear, replace thermostat if needed.  
Recalibrate stat to clear, cool down stat, adjust setpoint, replace thermostat if needed.  
Recalibrate stat to clear, warm up stat, adjust setpoint, replace thermostat if needed.  
Recalibrate stat to clear, adjust setpoint, replace thermostat if needed.  
Recalibrate stat to clear, replace thermostat if needed.  
Recalibrate stat to clear replace thermostat if needed.  
Page 35  
icomfortTouch Screen 7−Day Programmable Thermostat  
href="
Wiring Diagrams − Communicating Systems  
icomfort  
FURNACE (IFC) OR AIR HANDLER (AHC)  
OPTIONAL DIS-  
CHARGE AIR SEN-  
SOR (SEE DAS  
NOTE)  
DAS NOTE − The discharge air sensor  
is intended to be mounted downstream  
of the heat exchanger and air condi-  
tioning coil. It must be placed in free  
airflow, where other accessories (such  
as humidifiers, UV lights, etc.) will not  
interfere with its accuracy. Wiring dis-  
tance between the IFC or AHC and the  
discharge air sensor should not exceed  
10ft when wired with 18−gauge thermo-  
stat wire.  
OPTIONAL OUT-  
DOOR AIR SENSOR  
(SEE OAS NOTE)  
icomfortꢁ  
THERMOSTAT  
OAS NOTE − Wiring distance between  
the IFC or AHC and the outdoor tem-  
perature sensor should not exceed  
200ft when wired with 18−gauge ther-  
mostat wire.  
icomfort  
OUTDOOR AIR  
CONDITIONING OR  
HEAT PUMP UNIT  
RSBus  
RSBus  
icomfort  
icomfort  
icomfort  
Thermostat  
Maximum total length of all connections  
on the RSBus is limited to 1500ft.  
Indoor Furnace or Air Handler  
Outdoor Condensing Unit or Heat Pump  
Wire gauge of RSBus wire is 18.  
Page 36  
506052−01 11/09  
 
href="
Wiring Diagrams − Communicating Indoor/non−Communicating Outdoor Systems  
icomfortAIR HANDLER (AHC)  
icomfortFURNACE (IFC) OR AIR HANDLER (AHC)  
OPTIONAL DIS-  
OPTIONAL DIS-  
CHARGE AIR SEN-  
SOR (SEE DAS  
OPTIONAL OUT-  
DOOR AIR SENSOR  
(SEE OAS NOTE  
CHARGE AIR SEN-  
SOR (SEE DAS  
OPTIONAL OUT-  
DOOR AIR SENSOR  
(SEE OAS NOTE  
icomfortꢁ  
THERMOSTAT  
icomfortꢁ  
THERMOSTAT  
RSBus  
RSBus  
Maximum total  
length of all connec-  
tions on the RSBus  
is limited to 1500ft.  
Maximum total  
length of all connec-  
tions on the RSBus  
is limited to 1500ft.  
STANDARD  
OUTDOOR AIR  
CONDITIONING  
UNIT − 1 OR 2  
STAGE  
STANDARD  
OUTDOOR HEAT  
PUMP UNIT − 1  
OR 2 STAGE  
Wire gauge of  
RSBus wire is 18.  
Wire gauge of  
RSBus wire is 18.  
icomfortThermostat  
icomfortThermostat  
icomfortIndoor Furnace or Air Handler  
Standard Outdoor Condensing Unit  
icomfortAir Handler  
Standard Outdoor Heat Pump  
Page 37  
icomfortTouch Screen 7−Day Programmable Thermostat  
href="
Optional Accessories for use with any icomfortt system  
NOTE: icomfortT’STAT SENSES HUMIDITY & CON-  
TROLS 24V ꢀH" OUTPUT (& 120V ꢀH" OUTPUT) TO  
CYCLE HUMIDIFIER BASED ON DEMAND. NO OTH-  
ER CONTROL OR HUMIDISTAT REQUIRED.  
icomfort  
FURNACE (IFC) OR  
AIR HANDLER (AHC)  
OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH  
HUMIDIFIER (IF NOT ALREADY IN THE SYSTEM FOR  
OTHER FUNCTIONS. BUILT INTO ALL icomfortOUT-  
DISCHARGE AIR SENSOR  
(REQUIRED FOR EVEN HEAT)  
icomfortꢁ  
THERMOSTAT  
RSBus  
Maximum total  
length of all con-  
nections on the  
RSBus is limited  
to 1500ft.  
Wire gauge of  
RSBus wire is 18.  
NOTE: 24V UV LIGHT  
APPLICATIONS  
Neither icomfort furnace nor  
icomfort air handler transformer  
will have adequate VA to power  
24V UV light applications. An  
additional transformer for UV  
light applications is required.  
Page 38  
506052−01 11/09  
href="
Optional Accessories for use with any icomfortt system  
icomfort  
FURNACE OR  
AIR HANDLER  
icomfort  
icomfort  
FURNACE OR  
AIR HANDLER  
OUTDOOR AIR  
CONDITIONING OR  
HEAT PUMP UNIT  
HEPA BYPASS FIL-  
TER X2680 HEPA  
INTERLOCK KIT  
PASS INDOOR BLOWER  
MOTOR COMMON WIRE  
THROUGH CURRENT LOOP.  
SEE HEPA INTERLOCK KIT  
FOR INSTALLATION DE-  
TAILS  
icomfort  
FURNACE OR  
AIR HANDLER  
STANDARD  
1 OR 2 STAGE  
AC OR HP UNIT  
icomfort  
FURNACE OR  
AIR HANDLER  
LVCS VENTILATION  
CONTROL SYSTEM  
SEE LVCS VENTILATION  
INSTRUCTIONS FOR DAMPER  
& SENSOR WIRING  
Page 39  
icomfortTouch Screen 7−Day Programmable Thermostat  

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