Honeywell 7800 SERIES Operation manual

7800 SERIES
S7800A2142 4-Line LCD
Keyboard Display Module
PRODUCT DATA
32-00110-07
APPLICATION
The S7800A2142 Keyboard Display Module
(KDM) provides current system status along
with first-out annunciation and system
diagnosis using a five-row by 64 column
readout (Main screen shows 4 rows of text
for better long-distance legibility, all other
screens show 5 rows of text). The KDM
provides local or remote annunciation of
operation and fault information, remote
reset, report generation, burner control data
and diagnostic information. The KDM is
part of the 7800 SERIES of microprocessor-
based burner controls for gas, oil, coal
or combination fuel single burner
applications.
The 7800 SERIES is programmed to provide
a level of safety, functional capabilities
and features beyond the capacity of
conventional controls.
The S7800A2142 is required to program
the Valve Proving feature of selected 7800
Series devices.
The S7800A2142 KDM offers the following
technical advancements to the 7800
SERIES devices:
• Compatible with installed Honeywell
7800 SERIES systems.
• When used with the new 7800 SERIES
with Valve Proving Feature, the KDM
allows for programming the Valve
Proving Control feature and timing (Pass
Code protected feature).
• When used with the new 7800 SERIES
with Postpurge feature, the KDM allows
for programming the Postpurge time
(Pass Code protected feature).
• Allows for naming the S7830 Expanded
Annunciator terminals to match your
system drawings. (Displayed message
only.) (Pass Code protected feature.)
• An eight line (available by scrolling)
by twenty column readout set of “Call
Service” (Business Card) alpha/numeric
directions can be displayed instead of the
standard lockout display message. (Pass
Code protected feature).
• Enable ModBus communication feature.
• Configure language for English, Spanish,
or French.
• On-line troubleshooting guide.
Contents
FEATURES 2
SPECIFICATIONS 2
INSTALLATION 3
WIRING 5
TROUBLESHOOTING 10
APPENDIX A: DISPLAY SETUP 28
APPENDIX B: BURNER CONTROL
COMMISSIONING 43
APPENDIX C: DIAGNOSTICS 48
APPENDIX D: ANNUNCIATOR TERMINAL
MESSAGES 50
APPENDIX E: MODBUS FUNCTION 51

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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The Business Card (Call Service) and
Expanded Annunciator can be made up
using:
• Capital letters (A through Z in configured
language).
• Lower case letters (a through z in
configured language).
• Numbers (0 through 9).
• Symbols (!, @, #, $,%, etc.).
Programming can be done with the S7800
KDM mounted on a 7800 SERIES Relay
Module or with a 13 Vdc power source
connected to the KDM through the 203541
5-wire connector.
Since your Business Card (Call Service)
S7800A2142 will be left at the job site,
programming your personal three-number
password and personal lockout message
can be set up ahead of time without being
connected to a 7800 SERIES device.
FEATURES
• Application flexibility.
• Communication interface capability.
– Through Q7700 Network Interface Unit
– Through 203541 Connector on the
ModBus data high- way.
• Dependable, long-term operation
provided by microcomputer technology.
• First-out annunciation and system
diagnostics provided by a 5-line by
64-character display.
• First-out expanded annunciation with 24
limit and interlock Light Emitting Diodes
(LEDs).
• Local or remote annunciation of
operation and fault information.
• UL NEMA Class 4 rating when p/n
204729A,C NEMA 4 cover is used.
• Remote reset.
• Report generation.
• On-line troubleshooting guide.
• Burner controller data:
– Sequence status.
– Sequence time.
– Hold status.
– Lockout/alarm status.
– Flame signal strength.
– Expanded annunciator status.
– Total cycles of operation.
– Total hours of operation.
– Fault history of six most recent faults:
•Cycles of operation at time of fault.
•Expanded annunciator data at time
of fault.
•Fault message and code.
•Hours of operation at time of fault.
•Sequence status at time of fault.
•Sequence time at time of fault
– Diagnostic information:
•Device type.
•Flame amplifier type.
•Flame failure response time (FFRT).
•Manufacturing code.
•On-Off status of all digital inputs and
outputs.
•Prepurge time
•Postpurge time
•Valve Proving mode
•Valve Proving time
•Software revision and version of 7800
SERIES.
•Relay Module and KDM.
•Status of configuration jumpers.
•Status of Run/Test Switch.
•Reset count
•Reset reason
SPECIFICATIONS
Electrical Ratings:
Voltage and Frequency: 13 Vdc peak full
wave rectified (+20%/- 15%).
Power Dissipation: 7W maximum. VA
consumption: 2 VA maximum.
Terminal Ratings:
Power: 13 Vdc peak full wave rectified.
Earth Ground.
Environmental Ratings:
Ambient Temperature Ranges:
Operating: 0 °F (-18 °C) to +140 °F (+60 °C).
Storage: -22 °F (-30 °C) to +158 °F (+70 °C).
Humidity: 85% relative humidity
continuous, noncondensing.
NOTE: UL NEMA Class 4 rating when P/N
204729A,C NEMA 4 Cover is used.
Vibration: 0.5G environment.
Mechanical:
Dimensions: See Fig. 1.
Weight: 4 oz. (124 grams), unpacked.
Display:
5 rows by 64 columns with title and
navigation bar.
Languages:
S7800A2142 English/Spanish/French
Language display.
Approvals:
Underwriters Laboratories Inc. Listed: File
No. MP268, guide No. MCCZ.
Factory Mutual Approved: Report No.
J.I.1V9A0.AF. IRI: Acceptable.
Federal Communications Commission: Part
15, Class B emissions.

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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EN60730: For compliance with remote
KDM mounting require- ments, provide
electrical insulation separation by
insulation using double or reinforced
insulation. Do this by: Optically iso-
lating the communication or remote
reset lines from the control cabinet, or
provide physical separation from the
communication or remote display cover
assembly (part number 204729A) or other
suitable enclosure that meets the IP40
class of protection.
Accessories:
203541 ControlBus™ 5-wire Electrical
Connector.
S7810A1009 Data ControlBus™ Module.
203765 Remote Display Mounting Bracket.
221818A 60 in. (1.5 m) Extension Cable
Assembly.
221818C 120 in. (3 m) Extension Cable
Assembly.
204729A NEMA 4 Cover Assembly for
S7800A KDM.
204729C NEMA 4 Cover Assembly for
S7800A KDM with reset button.
205321B Remote Display Flush Mount Kit.
4.85
(123.3)
2.75
(69.8)
.17
(4.3)
2.63
(66.8)
.18
(4.6) .91
(23.1)
.99
(25.1)
.22
(5.7)
.59
(15)
.32
(8.1)
3.76
(95.4)
.21
(5.4)
.78
(19.8)
.11
(2.9)
.34
(8.8)
.52
(13.2)
1.14
(29)
4.19
(106.4)
1.97
(50)
.10
(2.5)
.10
(2.4)
1.84
(46.7)
Fig. 1. Approximate dimensions of S7800A2142
in. (mm).
INSTALLATION
WARNING
Electrical Shock Hazard.
Can cause severe injury, death
or property damage.
Disconnect the power supply before
beginning installation to prevent
electrical shock and equipment
damage. More than one power
supply disconnect can be involved.
When Installing This Product…
1. Read these instructions carefully.
Failure to follow them could damage the
product or cause a hazardous condition.
2. Check the ratings given in the
instructions and marked on the product
to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced,
flame safeguard service technician.
4. After installation is complete, check out
the product operation as provided in
these instructions.
5. Be sure wiring complies with all
applicable codes, ordinances and
regulations.
6. See Fig. 3 for S7800A unique wiring
connections.
IMPORTANT
1. This equipment generates, uses and can
radiate radio frequency energy and, if not
installed and used in accordance with the
instructions, can cause interference to radio
communications. It has been tested and
found to comply with the limits for a Class
B computing device of Part 15 of FCC rules
which are designed to provided reasonable
protection against such interference when
operated in a commercial environment.
Operation of this equipment in a residential
area can cause interference, in which case,
users, at their own expense, can be required
to take whatever measures are required to
correct this interference.
2. This digital apparatus does not exceed
the Class B limits for radio noise for digital
apparatus set out in the Radio Interference
Regulations of the Canadian Department of
Communications.
Humidity
Install the S7800A where the relative
humidity never reaches the saturation
point. The S7800 is designed to operate
in a maximum 85% RH continuous,
noncondensing, moisture environment.
Vibration
Do not install the S7800A where it can be
subjected to vibration in excess of 0.5G
continuous maximum vibration.

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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Temperature
Temperatures below 32 °F (0 °C) may cause
a slow screen refresh rate and ghosting.
This effect will be most evident during cold
start-up (display has not been operating
and is in a < 32 °F (0 °C) environment). This
is due to the time required for the display to
warm up. The display has a heater feature
which can be set to automatic/ON/OFF
(refer to page 42 Heater Mode)
If the display does not fully recover within 5
minutes, then check the systems line input
voltage to insure it is within specifications.
For certain RM/ EC7800xx models the
display heater (used to improve display
legibility in colder temperatures) will not be
available and will not function regardless
of what the setting is in the display module
Heater Mode.
Refer to page 43 Models that do not
use the Heater Function for a list of relay
models that do not use the heater function.
Weather
The S7800A is not designed to be weather
tight. If installed outdoors, the S7800A
must be protected by an approved
weather-tight enclosure such as the
204729A or 204729C NEMA 4 Enclosure
listed in Accessories.
S7800A2142 Embedded Features
See Appendix A to set up the following
features:
• Call Service (Business Card) information
displayed when burner system is in
Lockout of the 7800 SERIES device.
• Customizing of Expanded Annunciator
(S7830) message to match a given
installed limit string. If ModBus Feature
is required, use S7810M1003 ModBus
Module.
• ModBus communication setup and
enable feature: Note that this will
occupy terminals 1, 2, 3 of the 203541
Connector on the KDM, which disables
the Expanded Annunciator Features.
SERVICE NOTE:
The S7800A2142 can either do the
Expanded Annunciator Feature or
ModBus -- not both. If BOTH are
required, order the S7810M1003
ModBus Module for the ModBus
option.
B. The S7800A2142 KDM is also used to
program the Valve Prov- ing and Post-
purge feature of Select RM7800 SERIES
devices. See Appendix B.
Mounting KDM on 7800 SERIES
Relay Module.
1. Align the two interlocking ears of the
KDM with the two mating slots on the
7800 SERIES Relay Module. See Fig. 2.
Fig. 2. Keyboard Display Module mounting.
2. Insert the two interlocking ears into
the two mating slots and, with a hinge
action, push on the lower corners of the
KDM to secure it to the 7800 SERIES
Relay Module.
3. Make sure the KDM is firmly in place.
Remote Mounting KDM
The KDM can be mounted either on the
face of a panel door or on other remote
locations. When mounting the KDM on the
face of a door panel, closely follow these
instructions:
1. Select the location on the door panel for
flush mounting.
2. Pay attention to the insertion
dimensions of the two KDM screws, two
interlocking ears, and the two plug-
in connections to allow for sufficient
clearance.
3. Use the KDM or Data ControlBus
Module™ as a template (Fig. 28)
and mark the two screw locations,
interlocking ear locations and the two
plug-in connector locations.
4. Drill the pilot holes for the mounting
screws.
5. Cut holes in the door panel for the
interlocking ears and the two plug-in
connectors.
6. Mount the KDM, securing it with the
two screws provided in the KDM bag
assembly.
Remote Display Mounting Bracket
Use the 203765 Remote Display Mounting
Bracket when mounting the KDM on a wall
or remote location:

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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1. Use the 203765 Remote Display
Mounting Bracket as a template to mark
the four screw locations.
2. Drill the pilot holes for the four
mounting screws.
3. Mount the 203765 Remote Display
Mounting Bracket by securing the four
no. 6 screws (M3.5 x 0.6).
4. Mount the KDM by aligning the two
interlocking ears with the two mating
slots on the remote mounting bracket.
5. Insert the two interlocking ears into the
two mating slots.
6. Push on the lower corners of the KDM
to secure it to the remote mounting
bracket.
7. Make sure the KDM is firmly in place.
WIRING
WARNING
Electrical Shock Hazard.
Can cause severe injury or
death.
To prevent electrical shock and
equipment damage, disconnect
the power supply from the main
disconnect before beginning
installation. More than one
disconnect can be involved.
1. Refer to Fig. 3 for proper wiring.
2. Make sure all wiring complies with all
applicable electrical codes, ordinances
and regulations.
3. For recommended wire size and type,
see Table 1.
4. For Recommended grounding practices,
see Table 2.
5. For KDM: The KDM is powered from a
low voltage, energy- limited source. It
can be mounted outside of a control
panel if it is protected from mechanical
damage.
NOTE: A 13 Vdc power supply must be
used any time more than one
KDM is used. A maximum of two
KDM, Data ControlBus™ Modules
or S7810B Multi-Drop Switch
Modules are allowed in any
combination.
Application Recommend-
ed Wire Size
Recom-
mended
Part Num-
ber
Keyboard Dis-
play Module
22 AWG two-
wire twisted pair
with ground, or
five-wire.
Belden 8723
shielded
cable or
equivalent.
Data Control-
Bus™ Module
22 AWG two-
wire twisted pair
with ground, or
five-wire.
Belden 8723
shielded
cable or
equivalent.
Remote Reset
Module
22 AWG two-
wire twisted pair,
insulated for low
voltage.
—
Commu-
nications
Interface
ControlBus
Module™
22 AWG two-wire
twisted pair with
ground.
Belden 8723
shielded
cable or
equivalent.
13 Vdc full
wave rectified
transformer
power input.
18 AWG wire,
insulated for
voltages and
temperatures for
given applica-
tions.
TTW60C,
THW75C,
THHN90C
Table 1. Recommended Wire Size and Part Number.
Ground Type Recommended Practice
Signal ground
(KDM, Data Con-
trolBus™ Module,
Communica-
tions Interface
ControlBus
Module™).
Use the shield of the signal
wire to ground the device to
the signal ground terminals
[3(c)] of each device. Con-
nect the shield at both ends
of the daisy chain to ground.
Table 2. Recommended Grounding Practices.
6. Recommended wire routing:
a. ControlBus:
(1) Do not route the ControlBus cable
in conduits that carry line voltage
circuits.
(2) Avoid routing the ControlBus cable
close to ignition transformer leadwires.
(3) Route the ControlBus cable outside
of conduit if properly supported and
protected from damage.
b. Remote Reset:
(1) Do not run high voltage ignition
transformer wires in the same conduit
with the Remote Reset wiring.
(2) Do not route Remote Reset wires in
conduit with line voltage circuits.
7. Maximum wire lengths:
(a) KDM: The maximum length
interconnecting wire is 4000 ft
(1219m).

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
320011007 6
(b) Remote Reset leadwires: The
maximum length wire is 1000 ft
(300m) to a Remote Reset push-
button.
8. Install all electrical connectors.
9. Restore power to the panel.
KDM Display
The first line of the KDM display provides
current status of the burner sequence
(STANDBY, PURGE, PILOT IGN, MAIN IGN,
RUN and POSTPURGE), timing information
(PURGE, PILOT IGN, MAIN IGN and
POSTPURGE) in minutes and seconds, hold
information (PURGE HOLD), and lockout
information (Lockout, Fault Code, Message
and Sequence). The second line will display
selectable or preemptive messages. A
selectable message supplies information
for flame strength, system status
indication, system or self-diagnostics and
troubleshooting. A preemptive message
has parentheses around the message and
supplies a detailed message to support the
sequence status information. A preemptive
message can also be a lockout message. A
preemptive message replaces a selectable
message to support the sequence status
information. The 7800 SERIES Relay
Module LED provide positive visual
indication of the Relay Module sequence.
The LED is energized simultaneously with
the correct sequence description.
1
1
2
3
3
2
120 OHM
RESISTOR
1
120 OHM
RESISTOR
A B
A B
C (GND)
+13 VDC
RESET
C (GND)
+13 VDC
RESET
123 45
123 45
MOMENTARY
PUSH BUTTON
SWITCH
S7810 DATA CONTROLBUS MODULEª
(MOUNTED ON 7800 SERIES RELAY MODULE)
7800 REMOTE KEYBOARD DISPLAY MODULE
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120
OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTIONS OVER 100 FEET. CABLE SHIELD MUST BE
TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED
CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.
M5285C
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULEª, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).
221818A OR C EXTENSION CAN BE USED IN PLACE OF THE
S7810 DATA CONTROLBUS MODULEª IF DISPLAY IS TO
A CABINET DOOR.
Fig. 3. Wiring Keyboard Display Module for remote
mounting.

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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CA B
1
2
5
3
PC/PLCGND RS-485
BUS
+-
+13 VDC RESET
B
C (GND)
A
MULTI-DROP RS-485 COMMUNICATION BUS. UP TO 31 S7800 SERIES 5 OR GREATER DISPLAYS CAN BE CONNECTED TO A SINGLE BUS
WITHOUT AN RS-485 REPEATER. UP TO 99 MODBUS™ (SUBNETWORKS) CAN BE CONNECTED TO A BUS WITH RS-485 REPEATERS. WHEN
USING AN RS-485 REPEATER, THE REPEATER MUST BE INSTALLED EVERY 30TH MODULE.
THE SUBNETWORKS MUST BE WIRED IN A DAISY CHAIN CONFIGURATION. RECOMMEND THAT THE PC/PLC BE AT ONE END OF THE
DAISY CHAIN.
THREE WIRE SHIELDED CABLE (BELDEN 8723 SHIELDED OR EQUIVALENT) IS RECOMMENDED AND SHOULD BE GROUNDED AS
FOLLOWS: IF NO INTERFERENCE IS PRESENT, OR TO REDUCE CAPACITIVE INTERFERENCE, THE SHIELD SHOULD BE GROUNDED
AT ONE END. WHEN GROUNDING ONLY ONE END OF THE THE SHIELD, THE SHIELD END CLOSEST TO THE S7810M MODBUS™
MODULE SHOULD BE ATTACHED TO EARTH GROUND. TO REDUCE INDUCTIVE INTERFERENCE (RF INTERFERENCE), THE SHIELD
SHOULD BE GROUNDED AT BOTH ENDS.
TERMINAL NUMBERS ARE ON 203541 5-WIRE CONNECTOR (SUPPLIED WITH REMOTE MOUNTING BRACKET).
M24190
123 45
123 45
+13 VDC RESET
B
C (GND)
A
123 45
123 45
6
4
6
1
6
MODBUS™ COMMUNICATION BUS TERMINATION RESISTORS:
A. WITHOUT RS-485 REPEATER:
MODULES AT THE CLOSEST AND FARTHEST END OF THE DAISY CHAIN REQUIRE TERMINATION RESISTORS.
INSTALL A 120 OHM, 1/4 WATT RESISTOR BETWEEN TERMINALS A AND B OF THE PC/PLC (IF INSTALLED AT ONE END THE DAISY CHAIN).
INSTALL A 120 OHM, 1/4 WATT RESISTOR BETWEEN TERMINALS 7 AND 8 OF THE LAST S7810M MODBUS™ MODULE IN THE DAISY CHAIN.
B. WITH RS-485 REPEATER:
WHEN AN RS-485 REATER IS USED, TWO DAISY CHAIN CONFIGURATIONS ARE EFFECTIVELY FORMED. MODULES AT THE
CLOSEST AND FARTHEST ENDS OF EACH DAISY CHAIN REQUIRE TERMINATION RESISTORS. INSTALL A 120 OHM, 1/4 WATT
RESISTOR BETWEEN TERMINALS A AND B OF THE PC/PLC (IF INSTALLED AT THE END OF THE DAISY CHAIN. INSTALL A 120
OHM, 1/4 WATT RESISTOR BETWEEN INPUT TERMINALS DATA+ AND DATA- OF THE RS-485 REPEATER. INSTALL A 120 OHM,
1/4 WATT RESISTOR BETWEEN TERMINALS 7 AND 8 OF THE LAST S7810M MODBUS™ MODULE IN THE ADDITIONAL DAISY CHAIN.
LOCAL RS-485 COMMUNICATIONS BUS. THE DEVICES ON THIS BUS MUST BE WIRED IN A DAISY CHAIN CONFIGURATION. THE ORDER OF
INTERCONNECTION IS NOT IMPORTANT. THE MODULES ON THE CLOSEST AND FARTHEST ENDS OF THE DAISY CHAIN REQUIRE A 120 OHM,
1/4 WATT TERMINATION RESISTOR BETWEEN TERMINALS 1 AND 2 OR A AND B.
MOMENTARY
PUSHBUTTON
SWITCH
MOMENTARY
PUSHBUTTON
SWITCH
RM78xx SERIES DEVICE
WITH S7800 SERIES 5
OR GREATER DISPLAY.
RM78xx SERIES DEVICE
WITH S7800 SERIES 5
OR GREATER DISPLAY.
Fig. 4. Wiring for ModBusTM Feature.
NOTE: LED has been replaced by block characters visible on the MB address setup menu.

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
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Fig. 5. S7800 Keyboard Display Module
Keyboard Functions
The keyboard contains six push-buttons
that are used to navigate on each page and
between pages on the display module (see
Fig. 6). These buttons generally have the
following functions:
• Up arrow - move up on a page or
increment a value for an input control
• Down arrow - move down on a page or
decrement a value for an input control
• Left arrow - move to the left on a page
(tab left) or go to a previous page
• Right arrow - move to the right on a page
(tab right) or go to the next page when
applicable
• OK - approve/accept the highlighted item
or go to the next page when applicable
• Home - go to the Home (Main Status)
page
When the burner control module is in a
Lockout condition the “Home” button
navigates to the Lockout page instead of
the Home page to display the lockout.
These buttons are acted on when they
are pressed and released. In some cases
a button can be pressed and held, i.e., not
released, for repeated execution of the
button (arrow buttons). Buttons are active
on some pages only when the action for the
button makes sense for the position of the
input focus on the page. If the input focus
doesn’t make sense for the button action,
selecting the button is ignored.
KEYBOARD
BUTTONS
Fig. 6. Keyboard buttons.
Page Structure
The Home and Lockout pages display text
using a larger font size than all other pages
so that information on them can be more
easily viewed from distances farther away
from the display module (see Fig. 7 and Fig.
8).
Up to 4-5 lines of text are displayed
(dependent on font size) at a time on the
page. When the page has more than 4 lines
of text to display a scroll bar is present on
the right-hand side of the page to indicate
this situation. The “Up arrow” and “Down
arrow” buttons are used to scroll up and
down the lines of the page. Each line is
highlighted with a white background to
indicate that it currently has input focus for
any button actions. The scroll bar adjusts to
give a relative position of the current view
with respect to all lines that the page can
display.
When a line has a right arrow symbol
positioned on the righthand side it
indicates that this line can navigate to
another page, “Next page”, related to the
subject of the line when that line has input
focus. A “Right arrow” or “OK” button can
be pressed when the focus is on this line to
navigate to the next page.
4 LINES
SCROLL
BAR
LINE WITH
INPUT
FOCUS
RIGHT ARROW SYMBOL INDICATES
“NEXT” PAGE IS AN OPTION
Fig. 7. Home page

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
9 320011007
4 LINES
GO TO
LOCKOUT
DETAIL
Fig. 8. Lockout page
For pages other than Home and Lockout a
smaller font size is used to display the text
and pages have a format like the one shown
in Fig. 9.
TITLE BAR
NAVIGA
TION
BAR
MAIN
BODY
Fig. 9. Page structure
The top line of the page is a title that
describes the context or purpose of the
page (see Fig. 9).The bottom line of the
page is a navigation bar which indicates
the more important button actions that can
be performed for the current input focus
(see Fig. 10). The middle or main body
of the page contains the lines that show
information or allow for user input. Up to 5
lines of text may be displayed in the main
body. Solid lines separate the title and
navigation bar from the main body.
NE
W INPUT
FOCUS
INPUT FOCUS
Fig. 10. Input focus
An item on a page that has input focus
is usually highlighted with an inverse
look (black text on white background) to
distinguish it from the rest of the page.
The arrow buttons move the input focus
to another selectable item if another one
exists on the page (some pages may only
have a single focus item).
For pages that allow user input (see Fig.
10) the input value is edited on the page
and then is acknowledged or confirmed at
another tab position on the page (“Yes” tab
in the above example). This confirmation
action permits the user to cancel the editing
and not commit to the change or to accept
the edited value.
Home Page
The Home page is the main status page
that displays primary status of the burner
control operation (see Fig. 11). This page is
intended to be the primary one displayed
most often when the user is not specifically
looking for other information or configuring
the display. The following information is
displayed by default:
• Burner control sequence or lockout state
• Flame signal strength
• Total cycles count
• Total run-time hours count
• Annunciator connection status
• Remote command status
The burner control sequence state may
be displayed in one or two lines due to the
length of the text. In case of two lines the
remaining lines are pushed down to make
room for the second line.
This page also permits navigation to the
following pages:
• Lockout message (when burner control is
in a lockout condition)
• Fault history
• Burner control diagnostic status
• Annunciator diagnostic status (when
annunciator is connected)
• Burner control commissioning
(supported models only)
• Display menu
MAY BE 1 OR 2
LINES (SEQUENCE
STATE)
GO TO FAULT
HISTORY
GO TO
COMISSIONING (ONLY
SOME MODELS)
GO TO DISPLAY
MENU
GO TO BURNER
DIAGNOSTICS
Fig. 11. Home page status
An additional status line can be displayed
between the burner control sequence line(s)
and the flame signal strength line when
configured (see “Selected Status Message”
on page 30). Fig. 12 shows an example
with the T6 terminal (“Demand”) status
displayed.
OPTIONAL
SELECTED
STATUS
Fig. 12. Home page status

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
320011007 10
The lines are scrollable using the up and down arrows. For lines that navigate to another
page the right arrow or OK button is pressed when the line has input focus (highlighted) to
go to the new page.
TROUBLESHOOTING
After the KDM is installed, return the 7800 SERIES to normal operation, restore power
and run the system through at least one complete automatic cycle. For complete
Troubleshooting and System Checkout information, see form 65-0229.
7800 SERIES System Diagnostics
Troubleshooting control system equipment failures is made easier with the 7800 SERIES
self-diagnostics and first-out annunciation. The S7800 provides visual annunciation by
displaying a fault code and fault or hold message on the display.
Self-diagnostics of the 7800 SERIES enables it to detect and annunciate both external
and internal system problems. Internal faults and external faults such as interlock failures,
flame failures and false flame signals are annunciated by the KDM via the 7800 SERIES
Relay Module.
The KDM displays a sequence status message indicating STANDBY, PREPURGE, PRE-
IGNITION, SAFETY 1, PILOT IGN, PILOT STAB., MAIN IGN, RUN or POSTPURGE, as
appropriate. The selectable messages also provide visual indication of current status and
historical status of the equipment, such as: Flame Signal, Total Cycles, Total Hours, Fault
History, Diagnostic Information and Expanded Annunciator terminal status (if used).
With this information, most problems can be diagnosed without extensive trial-and-error
testing.
Table 3 provides the sequence and status hold messages. These messages along with the
fault messages (Table 5) can be viewed on-line in the KDM.