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

320011007 2

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

3 320011007

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

320011007 4

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

5 320011007

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.

120 OHM

RESISTOR

120 OHM

RESISTOR

C (GND)

+13 VDC

RESET

C (GND)

+13 VDC

RESET

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

7 320011007

CA B

PC/PLCGND RS-485

BUS

+13 VDC

RESET

C (GND)

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

+13 VDC

RESET

C (GND)

123 45

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

320011007 8

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.

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

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.

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