Lennox ComfortSense 8500 Series Assembly instructions

507611-03
7/2019
Supersedes 11/2018
Installation and Setup
Guide
ComfortSense®8500 Commercial
Programmable Thermostat Series -

2
Table of Contents
Shipping and Packing List..................................3
CS8500 Features..................................................3
Product Dimensions............................................4
Unit Dimensions (H x W x D) ......................................... 4
Wall Plate Dimensions (H x W) ...................................... 4
Wiring Specications..........................................4
Communication Wire ..................................................... 4
Remote Sensor Wire ..................................................... 4
Transformer Wire............................................................ 4
Installation............................................................5
Terminal Connections .........................................6
Purpose.......................................................................... 6
Wiring CS8500 (with or without COSensor)................. 7
Installing Indoor Temperature Sensors ......................... 7
Installing Occupancy Sensor ......................................... 7
iCON™ by Lennox / L Connection
Equipment............................................................8
Network Thermostat Control (NTC) Setup ..................... 8
M1 / M2 Unit Controller Setup........................................ 9
M1 / M2 Unit Controller - Control Mode and
Backup Set Points Setup ............................................... 9
M3 Unit Controller Setup................................................ 9
CS8500 Setup.............................................................. 10
BACnet with M3 Unit Controller.......................10
Network Topology......................................................... 10
CS8500 Set Point Change ........................................... 10
CS8500 Occupancy Override ...................................... 11
BACnet Canceling Override ......................................... 11
Sensor Inputs ............................................................... 11
M3 Unit Controller Setup.............................................. 11
CS8500 Setup.............................................................. 13
CS8500 Sensor Failure................................................ 13
Functions Not Supported ............................................. 13
CS8500 Troubleshooting.............................................. 13
M3 Unit Controller - Setting Return Air
Temperature Limits ...........................................14
Menu ...................................................................14
Technician Settings ...................................................... 14
Parameter Settings Based on System Conguration... 15
Parameter Descriptions................................................ 16
System Status Descriptions.............................19
Error Codes and Reminders.............................23

3
Shipping and Packing List
Verify the following items have been included with
in the packing:
Table 1. Packing List
Quantity Item
1CS8500 (non-zoning) with back
plate
1Wall plate
2Wall anchors
2Screws (M3.5x24mm self-tapping)
1Warranty
1User guide
1Setup and installation guide
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed
by a licensed professional HVAC installer (or
equivalent) or service agency.
CS8500 Features
The ComfortSense®8500 (CS8500) is a commer-
cial, electronic, 7-day, multi-stage, programmable,
touchscreen thermostat. This CS8500 provides
temperature control for packaged gas/electric and
electric/electric for up to 4-heat / 4-cool multi-stage
roof top unit systems (not for heat pump systems).
• Models are available with or without COsensing
capabilities.
• For use with Energence®commercial rooftop
units equipped with Prodigy®.
• For use with iCON Intelligence Connected™ by
Lennox®building-automation solution.
• COmodels can be used to control Lennox’
premium rooftop unit Demand Control Ventilation
features based on COset points and conditions
stored in the unit controller.
The CS8500 also feature enhanced capabilities
    -
cation and control, economizer control and custom
reminders.
• 

• Built-in carbon dioxide monitoring version only


77°F (25°C). Sensor has built-in self-calibration
algorithm.

4
• Temperature monitoring - two internal
thermistors, range 32°F (0°C) to 99°F (37°C).

• External indoor temperature sensor connections

sensor in parallel may be used.
• External occupancy sensor connection (24VAC).
• 
• Maximum load per terminal - 1 amp
• Power supply range 18 to 30 VAC
• 
Product Dimensions
Unit Dimensions (H x W x D)

x 22mm)
Wall Plate Dimensions (H x W)

Wiring Specications
Communication Wire
Use one of the following Lennox communication ca-
bles (twisted pair with shield plenum):
Table 2. Twisted Pair Communication Wiring
(S-Bus - Yellow)
Catalog
Numbers Item
27M19 500 foot roll
 1000 foot roll
 2500 foot roll
CAUTION
This is a 24VAC low-voltage sensor. Do not install
on voltages higher than 30VAC.
Do not short (jumper) across terminals to test
installation. This will damage the sensor and void
the warranty.
Remote Sensor Wire
All remote sensors use standard non-shielded ther-
mostat wiring; sensors may be wired using two
wires of a multiple wire cable.
NOTE: Outdoor and indoor sensor wire runs
should not exceed 300 feet (100m).
Transformer Wire
Standard thermostat wire (one pair 20 AWG mini-
mum) may be used to wire the CS8500 to the op-
tional wall plug 24VAC transformer (18M13) or other
     -
former.

5
Installation
1. Unpacked the CS8500 and open the case
with a thin-blade screwdriver (see “Figure 1.
Removing Back Plate” on page 5).
2. Place between wall base and unit and twist to
separate unit from base.
Figure 1. Removing Back Plate
3. 

good air circulation at average temperature.
4. Do not install the CS8500 where it can be
󰀨
• Drafts or dead spots behind doors and in
corners.
• Entrance or automatic doors.
• Heat generating equipment such as kitchen
equipment.
• Enclose environment unless a remote indoor
sensor is used.
• Hot or cold air from ducts.
• Radiant heat from sun or appliances.
• Concealed pipes and chimneys.
• Non-heated or non-cooled areas such as an
outside wall behind the sensor.
5. Use the following steps:
a. Determine location using best practices.
b. Use the provided wall plate as a template
to determine location cutout for wiring and
location for wall anchors.
NOTE: The use of the provided wall plate is
optional.
Wall Anchor Locations
Use a level to align wall plate horizontally
Cutout location
for thermostat
wiring
Figure 2. Level Wall Plate
c. Cut or drill a small hole approximately 3/4”
x 3/4” for wiring.
d. Pull about three inches of all wiring through
opening and remove outer communication
wire jacket.
e. Trim 1/4” insulation from end of each wire.
f. 
for wall anchors.


g. Route the CS8500 and outdoor tempera-
ture sensor (optional) wiring from wall
through center openings on wall plate (use
is optional) and back plate (see “Figure 3.

Wall Plate (optional)
Thermostat
Back Plate
Run thermostat wire
through openings
Figure 3. Route Wiring
h. Secure back plate and wall plate (option-
al) to wall with the two provided mounting
screws.
Wall Plate (optional)
Thermostat
Back Plate
Screw
Figure 4. Secure Back Plate
NOTE: Remember to seal the hole in the wall with
a suitable material to prevent drafts from
entering the zone sensor case. Not doing
so could aect the internal temperature
and humidity sensors.
Terminal Connections
External sensors use standard thermostat wiring;
and may be wired using two wires of a multiple wire
cable. Wire run should not exceed 300 feet (100m).
        -
enced in “Table 2. Twisted Pair Communication Wir-
ing (S-Bus - Yellow)” on page 4.
Table 3. Twisted Pair Communication Wiring
(S-Bus - Yellow)
Terminals Purpose
R24VAC
T T External indoor temperature sensor

OC OC Occupancy sensor
 S-Bus communication
C24VAC common
IMPORTANT!
Damage to the ComfortSense 8500 may occur if
24VAC polarity is not maintained.

7
Wiring CS8500 (with or without COSensor)
Below are the terminal designations and a general
description of their purpose.
1. Connect wiring between CS8500 and
applicable controller.
2. Connect external sensors if applicable.
3. Seal the hole in the wall with a suitable material
to prevent drafts from entering the CS8500
case.
4. 
type and test system.
24VAC transformer with
overcurrent protection
required (6.5VA/Zone)
ComfortSense 8500
Figure 5. CS8500 Connections (both versions)
Installing Indoor Temperature Sensors
Wire external sensors as illustrated below. Up to
nine sensors may be used in averaging sensor
     

sensitive.
Figure 6. Temperature Sensor Wiring
(parallel)
The CS8500 will calculate the average temperature
readings from all connected external temperature
sensors. If any of the sensors malfunction, they
may still report a temperature value. Only when the
average value of the connected temperature sen-
sors including any malfunction sensor(s) is lower
than -40°F, or higher than 158°F, will the CS8500
determine that an external temperature sensor(s)
has failed and switch automatically to the CS8500’s
internal temperature sensor. A error message will be
displayed on the home screen and under the noti-
     
sensor” error.
Installing Occupancy Sensor
The occupancy sensor will output:
• 24VAC in occupied mode.
• 0VAC in unoccupied mode.

8
The following is an example on how to make connections for a occupancy sensor.
Figure 7. Occupancy Sensor Connections and 24VAC Transformer
iCON / L Connection Equipment
A single CS8500 can be connected directly to the
S-Bus connection on the Prodigy Unit Controller.
The optional settings (M2 ECTOs or M3 Parame-
ters) can be adjusted using Unit Controller software,
a PC with UC software, and L Connection PC con-
verter.
All parameters can also be set directly at the Unit
Controller. Refer to the applicable unit controller
application guide to edit the required ECTOs or pa-
rameters.
Network Thermostat Control (NTC) Setup
• NTC ECTO A4.07 is factory set to option 0
(local). In this system mode, the NTC will
operate the unit based on input from a local
sensor.
• NTC ECTO A4.07 must be set to option 1
(remote) if an L Connection communication
compatible ComfortSense 8500 is used. In
this system mode, the NTC will operate the unit
based on input from the ComfortSense 8500.

9
M1 / M2 Unit Controller Setup
From the main menu, perform the following naviga-
tion through the menus to set the S-Bus address for
L Connection.
Go to: Settings > Control > Guided Setup > Enter
Advanced Guide Setup > Set Control >
LCONN > ADDR
Enter the S-Bus address for L Connection. Once
done select the Set option to save the settings.
M1 / M2 Unit Controller - Control Mode and
Backup Set Points Setup
The following unit controller ECTOs must be set
when using the CS8500.
ECTO 5.27 - This is use and depends on the avail-
able sensors on the CS8500. Room temperature
reading is standard on all models. The following set-
ting instructs the M1/M2 unit controller what source
to get zone temperature, CO, and indoor RH input.
• 2 = Room temperature (A2)
• 
• 10 = Room temperature and indoor RH (A91)
• 11 = Room temperature, IAQ, and indoor RH
ECTO 6.01        
controller control mode and back-up set points to
use. Options are:
• 1 = Zone sensor mode with no backup.
• 2 = Zone sensor mode with local sensor backup.
• 3 = Zone sensor mode with return air sensor
backup.
M3 Unit Controller Setup
From the main menu, perform the following naviga-
tion through the menus to set the S-Bus address for
L Connection.
1. Go to SETUP > NETWORK INTEGRATION >
L-CONNECTION > LCONN ADDRESS.
2. Enter the desired LCONN ADDRESS (S-Bus)
and select SAVE to continue.
3. Set CONTROL MODE = ROOM SENSOR and
select SAVE to continue.
4. NETWORK SENSOR CO2(if equipped)
needs to be set to YES (if choosing COfrom
CS8500). Select SAVE to continue.
5. RELATIVE HUMIDITY needs to be set to YES
(if choosing RH from CS8500). Select SAVE
to continue.
 TEMPERATURE will need to be set to YES (if
choosing temperature from CS8500).
7.      
questions until it returns you to the NETWORK
INTEGRATION menu option.
NOTE: Once the conguration is saved, then
S-Bus communication will be lost and
alarm 110 (low priority) will be raised. This
will be cleared automatically when any
demand goes to M2/M3.

10
CS8500 Setup
1. From the CS8500’s home screen, go to MENU
> TECHNICIAN SETTINGS and enter 864 and
press OK to proceed.
2. Both the RTU and the CS8500 must be set
to the same S-Bus address. The rooftop
unit’s default address is 2 unless it has been
changed. Set the CS8500 S-Bus address to
match the rooftop unit’s S-Bus address.
3. Set operation with Smart Hub (central hub or
NCP) to ON/OFF.
• If the CS8500 is setup with the rooftop units
with a NCP set this to ON.
• If the CS8500 is setup with the rooftop units
and no NCP set this to OFF.
• If the CS8500 is being used in an iCON by
Lennox automation system with a Central
Hub, set this to ON.
NOTE: It may take 30 seconds up to two minutes
for the CS8500 to connect.
BACnet with M3 Unit Controller
This section describes how a CS8500 operates in a
BACnet environment with a M3 unit controller.
Network Topology
• All rooftop units are connected to the BACnet
front-end.
• Each rooftop unit is connected to one CS8500.
• The CS8500 communicates with the rooftop
units using the Lennox proprietary S-Bus
protocol.
CS8500 Set Point Change
The BACnet front-end provides the occupied and
unoccupied set points to the roof top unit.
The roof top unit (RTU) sends the same set points
to CS8500. The rooftop units uses these set points
until the CS8500 provides a new set point. When the
user changes the set point at the CS8500, it com-
municates the same to M3 unit controller. Upon re-
ceiving this information, the M3 unit controller starts
an override timer and uses the new set points until
the timer expires.
• While the timer is active, if BACnet queries the
M3 unit controller, it will be informed that the
rooftop units is using the override set points.
• When the timer expires, both the M3 unit
controller and CS8500 reverts to the set points
provided by BACnet.

11
BACNET
CONTROL
BACNET
S-Bus S-Bus
CS8500
CS8500
RTU
RTU
Figure 8. BACnet and CS8500
CS8500 Occupancy Override
• Rooftop units use occupied or unoccupied set
points based on the occupancy status supplied
by the BACnet front-end.
• The user has the option to force the system into
occupied status using the CS8500.
• When the user overrides occupancy at the
CS8500, it communicates the same to M3 unit
controller.
• Upon receiving this information, the M3 unit
controller starts an override timer and uses the
occupied set points until the timer expires.
• The CS8500 also remains in the occupied mode
as long as the override timer is active.
• While the timer is active, if BACnet queries the
M3 unit controller, it will be informed that the
rooftop unit is using the occupied set points.
• When the timer expires, both the M3 unit
controller and CS8500 reverts to the occupancy
status provided by BACnet.
BACnet Canceling Override
When the user changes the set point or occupancy
mode at the CS8500, it puts the M3 unit controller
into override mode. The BACnet front-end has the
option to cancel the override timer at any time by
sending a value of 3to BACnet Analog Object 103.
When the timer is canceled, the rooftop units and
CS8500 returns to using the occupancy status or set
points provided by the BACnet front-end.
Sensor Inputs
-
perature, relative humidity and/or COprovided by
the CS8500.
NOTE: Occupancy sensor input from the CS8500
cannot be utilized in this mode.
M3 Unit Controller Setup
BACnet compatibility with the M3 unit controller
  
        
CS8500 use the following procedure:
1. Go to MAIN MENU > SETTINGS > RTU
OPTIONS > EDIT PARAMETERS. Edit
parameter 385 and set to 1.
NOTE: Modifying 385 to 1 allows both the CS8500
and M3 unit controller to co-exist.)

12
2. Go to Prodigy MAIN MENU > SETTINGS >
GENERAL and set CONFIGURATION ID1,
position 5to B.
3. Go to SETUP and select NETWORK
INTEGRATION.
4. Use the adjust and set values arrows to display
L-CONNECTION and press the SAVE button
to continue.
5. Adjust the L-CONNECTION ADDRESS if
required and press SAVE button to continue.
NOTE: Both the L-Connection address and
CS8500 address setting will need to be
exactly the same.
 CONTROL MODE will need to be set to ROOM
SENSOR. Press the SAVE button to continue.
7. NETWORK SENSOR > CO2needs to be set
to YES (optional). Press the SAVE button to
continue.
8. NETWORK SENSOR > RELATIVE HUMIDITY
needs be set to YES (optional). Press the
SAVE button to continue.
9. NETWORK SENSOR > TEMPERATURE will
need to be set to YES (optional).
10.      
questions until it returns you to the NETWORK
INTEGRATION menu option.
NOTE: Once the conguration is saved, then
S-Bus communication will be lost and
alarm 110 (low priority) will be raised. This
will be cleared automatically when any
demand goes to M2/M3.
11. Go to SETUP and select NETWORK
INTEGRATION.
12. Use the adjust and set values arrows to
display BACNET and press the SAVE button
to continue.
13. Adjust the BACNET ADDRESS if required and
press SAVE button to continue.
NOTE: BACnet address and baud rate is to be
determined and/or set by the systems
integrator.
14. Adjust the BACNET BAUD RATE and press
SAVE button to continue.
15. CONTROL MODE will need to be set to ROOM
SENSOR. Press the SAVE button to continue.
 NETWORK SENSOR > CO2(if equipped)
needs to be set to NO (if choosing COfrom
CS8500). Press the SAVE button to continue.
17. NETWORK SENSOR > RELATIVE HUMIDITY
needs be set to NO (if choosing RH from
CS8500).
18. NETWORK SENSOR > TEMPERATURE will
need to be set to NO (if choosing temperature
from CS8500).
19.      
questions until it returns you to the NETWORK
INTEGRATION menu option.
NOTE: Once the conguration is saved, then
S-Bus communication will be lost and
alarm 110 (low priority) will be raised. This
will be cleared automatically when any
demand goes to M2/M3.

13
CS8500 Setup
1. From the CS8500’s home screen, go to MENU
> TECHNICIAN SETTINGS settings and enter
OK to proceed.
2. Both the RTU and the CS8500 must be set
to the same S-Bus address. The RTU default
address is 2 unless it has been changed. If it
has not change then set the CS8500 S-Bus
address to 2.
3. Set operation with Smart Hub (Central Hub) to
ON.
CS8500 Sensor Failure
If the CS8500 sensor fails, the RTU will revert to its
return air temperature for space temperature and
set points from BACnet.
Functions Not Supported
• Zoning
• Occupancy sensor input from the CS8500.
• BACnet in monitor mode.
• BACnet cannot refresh/reload set point override
timer.
CS8500 Troubleshooting
1. Make sure 24VAC is supplied to the CS8500.
2. Make sure the CS8500 S-Bus address setting
matches the M2/M3 unit controller address.
NOTE: NCP is required when using an NTC.
3. Check communication cable wiring.
4. Verify that the sensor data from the CS8500
display matches the Prodigy Unit Controller
display.
5. For the M1 unit controller (IMC), use the IMC
MODE TEMP switch to display the data.
 For the M2 unit controller:
Go to: DATA > SENSORS menu to display the data.
7. For the M3 unit controller:
Go to: DATA > IN/OUTPUT > SENSORS >
NETWORK

14
M3 Unit Controller - Setting Return Air
Temperature Limits
The M3 unit controller may be set up to monitor
return air temperature and interrupt the demand if
return temperature is above the heating adjustable
limits. To enable this feature set parameters 113 and
115 locally at the M3 unit controller which is located
inside the Lennox rooftop unit.
• Adjusting parameter 113 enables return room
temperature limits. Default is 0(OFF). To enable
set to 1(ON).
Go to: SETTINGS > RTU OPTION > EDIT
PARAMETER = 113 (EN RET AIR TMP LMT).
• Adjusting parameter 115 is used to interrupt a
heating demand. Default is 85.0°F. Adjustable

Go to: SETTINGS > RTU OPTION > EDIT
PARAMETER = 115 (HEAT RET AIR LIMIT)
If return air temperature is above the adjustable lim-
its, alarm code 40 will be displayed but not stored in
memory for recall.
Menu
Select the three lines in the upper right-hand corner
of the home screen to access the menu. Selectable

NOTE: Refer to the included user guide for more
details on the following menu selections.
• Notications - When a system error or reminder
occurs, a pop-up screen will appear indicating the
condition. (See user guide for details.)
• Performance Reports (only available when
“Operation with Smart Hub” is set to OFF.) (See
user guide for details.)
NOTE: Smart Hub reference is concerning Central
Hub
• Edit Schedule (only available when “Local
Scheduling Function” is set to ON.) (See user
guide for details.)
• Owner Settings (See user guide for details.)
• Technician Settings (See the following section
for details).
Technician Settings
During initial power up of the CS8500, the technician

option must be selected and a address set before
you can proceed. Use either the minus/plus buttons
or numeric keypad to enter the address. After the
S-Bus address is set, press the back button to return
to the technician settings menu.
NOTE: If you need to access the technician
settings option in the future, go to the home
page, press menu > technical settings and
enter technician PIN code 864. This code
cannot be changed.

15
Parameter Settings Based on System
Conguration
      
need to be set. Available bus addresses are 1
through 31.
Other settings are available based on whether oper-
ations with smart hub and local scheduling functions
is set to ON or OFF.
The second and third parameter is operation with
smart hub and local scheduling.
That option is either ON or OFF for both. Default
is OFF for both. Available parameters settings are
dependent on whether either parameter is ON or
OFF. See the following table to determine available
parameters based on OFF or ON.
Table 4. Parameter Settings based on System Conguration
Parameters
Setting Available when
Operation with Smart Hub is
ON or OFF
Setting Available when
Local Scheduling is set
to ON or OFF
Display on home screen ON or OFF ON or OFF
Contractor info ON or OFF ON or OFF
 ON or OFF ON or OFF
Smooth setback recovery (SSR) OFF ON
󰀨 ON or OFF ON or OFF
Temperature adjustment range ON or OFF ON or OFF
Remember override set point OFF ON
Schedule hold setting OFF ON
Reminders OFF ON or OFF
Reset to factory defaults ON or OFF ON or OFF
Change owner pin ON or OFF ON or OFF
RTU fan on/auto user control ON or OFF ON or OFF


Parameter Descriptions
1. S-Bus Address
Options are 1 through 31. Select address and
press the set button to save the setting and
return to the technician setting screen.
NOTE: S-Bus address should be the same as the
address being used by either the NTC or
unit controller which you wish to control
with the CS8500.
2. Operation with Smart Hub
󰀨
directly with a Prodigy Unit Controller via the
󰀨
In addition, when set to ON, this function will
allow the CS8500 to operate in a BACnet
network with an M3 Unit Controller or operate
with an iCON Hub / NTC.
3. Local Scheduling Function
This feature provides the ability to setup a local
schedule. When set to ON, several options are

the scheduling function can be turned on from
the home screen by selecting heat/cool on the
home screen and select mode schedule.
If the ComfortSense 8500 is in stand-alone
mode, local scheduling can be used. Adjusting
the temperature set points on the CS8500 will
put the unit in an override period.
4. Display on Home Screen
Turn ON or OFF for the followings options.
Factory default is set to OFF.
• RTU Fan
• COvalue (only on models with COsensor)
• RTU function state
• Service required alert
Factory default is OFF for all of the above
options. Press <in the upper left-hand corner
of the screen to return to the technician settings
menu.
5. Contractor Info
Information to be completed for this option is
name, address, phone, email and website.
Press <in the upper left-hand corner of the
screen to return to the technician settings
menu.
 Temperature Sensor Cong
Temp. Sensor source by default is set to
internal temp. sensor. The other option is
external temp. sensor(s). When external temp.
sensor(s) is selected, the following settings

• Number of external temp. sensor. Default is
1 and up to 9 can be selected.
• Type of external sensor. Options are 10k
sensor type 2 (47W37) or 11k sensor type

type 2.

17
Press <in the upper left-hand corner of the
screen to return to the technician settings
menu.
7. Smooth Setback Recovery (SSR)
Options are enable or disable. Default is
Enabled.
When enabled, smooth set recovery
begins recovery up to two hours before the
programmed time so that the programmed
       
corresponding programmed event time and
is applicable for all equipment settings. With
smooth set recovery disabled, the control will
start a recovery at the programmed time.
8. O󰀨sets
•    󰀨 󰀨  
built-in temperature sensor (internal) is -5°F

• 󰀨
when external temp. sensor is selected
    󰀨

Default is 0°F.
• 󰀨

• CO󰀨󰀨 sensor

(Only on models with internal COsensor.)
9. Temperature Adjustment Range
The adjustment range for screen unlock is 0
to 10 degrees in increments of one degree.
The default setting is 2. There is a ON / OFF
adjustment for screen lock as well.
When the Local Scheduling function is set to
OFF and operations with the Smart Hub is set
to OFF, the CS8500 will use the heating and
cooling, unoccupied and occupied set points
from the Prodigy controller. These can only be
adjusted at the rooftop unit.
10. Remember Override Set Point
This setting is only available when local
scheduling is set to ON. When an override is
set the status text will display “Period of Time”
instead of “Schedule Hold”
When an override is set the unit will remember
this override setting for the current occupied
period and re-apply it at the same occupied
period, every time it occurs.
This setting will be able to be enabled or
disabled.
11. Schedule Hold Settings
This is a setting for hold until next scheduled
period option. Options are enable or disable.
Default is enabled.
When a user sets an override the unit will allow
the user to set the duration of the override to
“1 hour, 2 hours, or Until the Next Scheduled
Period.”

18
The Technician Settings can allow a user to
disable the “Until Next Scheduled Period”
option when unoccupied. This option applies to
stand-alone mode.
12. Reminders
Two customer reminders can be set and a
routine system check up.
• For both reminders, the name change be
customized and date and time set.
• For routine system check up the date and
time can be set.
13. Reset to Factory Defaults

reset and all reset.
• Reset reminders.
• Reset schedule.
• Reset all settings - Resets everything to
default.
• Reset all owner settings - Resets all
owners settings listed under general display
menus.
• Reset technician settings: Resets all
technician settings listed on the technician
menu.
Press <in the upper left-hand corner of the
screen to return to the technician settings
menu.
14. Change Owner Pin
This option is used to create or change
the owner pin number when screen lock is
enabled under the owner settings > generals
settings
lock can be set from home screen > menu >
owner settings > general. Screen lock ON or
OFF. Default is OFF.
15. RTU Fan On/Auto User Control
Options are OFF and ON. Default is OFF.
When this is set to on:
• RTU FAN is displayed on the home screen.
• FAN setting option is displayed under owner
settings menu.
When this is set to OFF, fan is not displayed
and fan option under owner settings is not
available.

19
System Status Descriptions
The system status screen icons can be access by pressing the ··· (three dots) which is located on the left
side of the home screen. Then press the view status option.
       
access that screen.
NOTE: The technician pin cannot be changed.
Table 5. System Status Descriptions
State (Icon) Icon Location Description
Home Screen When current RTU function is heating, this icon will
be displayed.
Home Screen When current RTU function is cooling, this icon will
be displayed.
Home Screen When current RTU function is dehumidifying, this
icon will be displayed.
Home Screen When fan operation was set to auto, if blower of
RTU is ON, this icon will be displayed.
Home Screen When fan operation was set to on, if RTU blower is
ON, this icon would be displayed.
Home Screen This icon is displayed on the screen in COmode. If
display function is turned on

20
Table 5. System Status Descriptions
State (Icon) Icon Location Description
Home Screen
When either of following error occur, this icon would
be displayed.
• Some RTU compr. Locked
• All RTU compr. Locked
• RTU fault state - fault detected
• CS fault state - fault detected
Home Screen Display during smooth setback recovery (SSR)
execution.
Technician Status
Screen There are communication errors.
Technician Status
Screen Lost communications with host.
Technician Status
Screen There are no communication errors.
Technician Status
Screen
When RTU state is warm-up mode coming out of an
unoccupied state, this icon will be displayed.
Technician Status
Screen
When RTU state is cool-down mode coming out of
an unoccupied state, this icon will be displayed.