Grieve Corporation S7800A Installation Manual

S7800A Keyboard Display Module

APPLICATION

The S7800A Keyboard Display Module (KDM) provides first­out annunciation and system diagnosis using a two-row by
twenty-column readout. 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.

7800 SERIES

PRODUCT DATA

FEATURES

• Application flexibility.

• Communication interface capability (RM78XX only).

• Dependable, long-term operation provided by
microcomputer technology.

• First-out annunciation and system diagnostics
provided by a 2-row by 20-column display.

• First-out expanded annunciation with 24 limit and
interlock Light Emitting Diodes (LED).

• Local or remote annunciation of operation and fault
information.

• Remote reset.

• Report generation.

• 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 selected.

• Software revision and version of 7800 SERIES
Relay Module and KDM.

• Status of configuration jumpers.

• Status of Run/Test Switch.

® U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • All Rights Reserved

Contents

Application .......................................................................... 1

Features .............................................................................. 1

Specifications ...................................................................... 2

Ordering Information ........................................................... 2

Installation ........................................................................... 3

Wiring .................................................................................. 4

Troubleshooting .................................................................. 11

65-0090-3

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

,

,

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: -40°F (-40°C) to +140°F (+60°C).

Storage: -60°F (-51°C) to +150°F (+66°C).
Humidity: 85 percent relative humidity continuous,

noncondensing.
Vibration: 0.5G environment.

Mechanical:

Dimensions: See Fig. 1.
Weight: 4 ounces (124 grams), unpacked.

Display:

40 character (2 rows by 20 columns).

Languages:

S7800A1001 English language display.
S7800A1035 French language display.
S7800A1043 German language display.
S7800A1050 Italian language display.
S7800A1068 Spanish language display.
S7800A1118 Japanese (Katakana) language display.
S7800A1126 Portuguese language display.

BURNER CONTROL

2-3/4
(69)

15/
32
(12)

1-15/16
(49)

29/32
(23)

SCROLL MODE

19/32
(15)

5/32 (4)

4-27/32 (123)

1-1/4
(32)

7/16 (11)

2-7/16 (62)

3-7/8 (99)

SAVE

4-3/32 (104)

1-1/32
(26)

13/
32
(11)

5/32
(4)

1/2
(13)

5/16
(8)

2-1/32
(52)

5/15
(8)

29/32
(23)

M5002B

Fig. 1. Approximate dimensions of S7800 in in. (mm).

Approvals:

Underwriters Laboratories Inc. Listed:

File No. MP268, Guide No. MCCZ.

Canadian Standards Association Certified:

No. LR9S329-3.
Factory Mutual Approved: Report No. J.I.1V9A0.AF.
IRI: Acceptable.
Federal Communications Commission: Part 15,

Class B emissions.
EN60730: For compliance with remote KDM mounting

requirements, provide electrical insulation separation by

insulation using double or reinforced insulation. Do this

by: Optically isolating the communication or remote

reset lines from the control cabinet, or provide physical

separation from the communication or remote display

cover assembly (part number 204718A) or other

suitable enclosure that meets the IP40 class of

protection.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:

1. Your local Home and Building Control Sales Office (check white pages of your phone directory).

2. Home and Building Control Customer Logistics
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 [phone]

In Canada—Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, Ontario M2H 3N7.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

65-0090—3 2

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Accessories:

203541 ControlBus 5-wire Electrical Connector.
S7810A1009 Data ControlBus Module™.
203765 Remote Display Mounting Bracket.
221818A 60 in. (1.5m) Extension Cable Assembly.
221818C 120 in. (3m) Extension Cable Assembly.
204718A NEMA 4 Cover Assembly for S7800A KDM.
204718B NEMA 1 Cover Assembly for S7800A KDM.
204718C NEMA 4 Cover Assembly for S7800A KDM with

reset button.

205321B Remote Display Flush Mount Kit.

INSTALLATION

WARNING

Electrical Shock Hazard.
Can cause serious injury or death.

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.

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.

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 204718A or 204718C
NEMA 4 Enclosure listed in Accessories.

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.

5. Be sure wiring complies with all applicable codes,
ordinances and regulations.

6. See Fig. 5, 6 and 7 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.

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. See Fig. 3. When mounting the
KDM on the face of a door panel, closely follow these
instructions:

65-0090—33

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Fig. 3. Panel mounting of a keyboard display module.

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. 16) 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.

Use the 203765 Remote Display Mounting Bracket when
mounting the KDM on a wall or remote location:

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).
See Fig. 4.

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.

Fig. 4. Remote mounting of a keyboard display module

using a 203765 Remote Display Mounting Bracket.

WIRING

WARNING

Electrical Shock Hazard.
Can cause serious 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. 5, 6, and 7 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.

65-0090—3 4

Application Recommended Wire Size Recommended Part Numbers

1

1

120 OHM
RESISTOR

1

120 OHM
RESISTOR

A

B

A

B

C

C (GND)

+13 VDC

RESET

1

23

4

5

1

23

MOMENTARY
PUSH BUTTON
SWITCH

S7800 KEYBOARD DISPLAY MODULE
(MOUNTED ON 7800 SERIES RELAY MODULE)

QS7800 COMMUNICATIONS
INTERFACE CONTROLBUS
MODULE, MOUNTED IN
Q7700 COMMUNICATIONS
INTERFACE MODULE

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120
OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTIONS OVER 100 FEET (30 METERS). CABLE SHIELD
MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS.
IF SHIELDED CABLE IS NOT USED, TWISTED PAIR
WIRE MUST BE USED.

WHEN CONNECTING THE KEYBOARD DISPLAY MODULE, DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).

M1990E

2

2

Keyboard Display Module 22 AWG two-wire twisted pair with ground, or five-wire. Belden 8723 shielded cable or

Data ControlBus Module™ 22 AWG two-wire twisted pair with ground, or five-wire. Belden 8723 shielded cable or

Remote Reset Module 22 AWG two-wire twisted pair, insulated for low voltage. —
Communications Interface

ControlBus Module™
13 Vdc full wave rectified

transformer power input.

Ground Type Recommended Practice

Signal ground (KDM, Data ControlBus
Module™, Communications Interface
ControlBus Module™).

6. Recommended wire routing:
a. ControlBus:

1. Do not route the ControlBus cable in

2. Avoid routing the ControlBus cable close to

3. Route the ControlBus cable outside of

b. Remote Reset:

1. Do not run high voltage ignition transformer

2. Do not route Remote Reset wires in conduit

7. Maximum wire lengths:
a. KDM: The maximum length interconnecting wire

is 4000 ft (1219m).

b. Remote Reset leadwires: The maximum length

wire is 1000 ft (300m) to a Remote Reset push­button.

8. Install all electrical connectors.

9. Restore power to the panel.

Table 1. Recommended Wire Size and Part Number.

22 AWG two-wire twisted pair with ground. Belden 8723 shielded cable or

18 AWG wire insulated for voltages and temperatures
for given applications.

Table 2. Recommended Grounding Practices.

Use the shield of the signal wire to ground the device to the signal ground
terminals [3(c)] of each device. Connect the shield at both ends of the daisy
chain to ground.

conduits that carry line voltage circuits.

ignition transformer leadwires.

conduit if properly supported and protected
from damage.

wires in the same conduit with the Remote
Reset wiring.

with line voltage circuits.

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

equivalent.

equivalent.

equivalent.
TTW60C, THW75C, THHN90C

Fig. 5. Wiring the keyboard display module.

65-0090—35

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

S7800 KEYBOARD DISPLAY MODULE
(MOUNTED ON 7800 SERIES RELAY MODULE)

MOMENTARY
PUSHBUTTON

A

B

C (GND)

23 54

1

120 OHM
RESISTOR

120 OHM
RESISTOR

1

A

S7800 REMOTE KEYBOARD DISPLAY MODULE

1

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO
120 OHM TERMINATING RESISTORS ARE REQUIRED FOR
CONNECTING OVER 100 FEET [30 METERS]. CABLE SHIELD
MUST BE TERMINATED TO EARTH GROUND AT BOTH ENDS.
IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE
MUST BE USED.

2

WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).

3

7800 SERIES RELAY MODULE CAN SUPPORT ONE S7800
KEYBOARD DISPLAY MODULE. A 13 Vdc POWER SUPPLY
IS REQUIRED FOR EACH ADDITIONAL DISPLAY.

4

UP TO 36 S7800 KEYBOARD DISPLAYS CAN BE CONNECTED
TO A SINGLE 7800 RELAY MODULE NOT TO EXCEED
4000 FEET (1219M) TOTAL LEADWIRE RUN. DAISY CHAIN 1 TO 1,
2 TO 2, 3 TO 3 AND PROVIDE 13 Vdc POWER SUPPLY FOR
EACH S7800 DISPLAY.

1

1

23 54

B

C (GND)

+13 VDC

2

+13 VDC

RESET

RESET

SWITCH

3

13 Vdc
POWER
SUPPLY

4

2

L1
(HOT)

L2

M5006F

Fig. 6. Wiring for multiple keyboard display modules.

available. 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.

S7810 DATA CONTROLBUS MODULE™
(MOUNTED ON 7800 SERIES RELAY MODULE)

MOMENTARY
PUSH BUTTON

A

1

120 OHM
RESISTOR

120 OHM
RESISTOR

1

A

7800 REMOTE KEYBOARD DISPLAY MODULE

THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO 120

1

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.

2

WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQUIREMENTS (SEE APPROVALS).

3

221818A OR C EXTENSION CAN BE USED IN PLACE OF THE
S7810 DATA CONTROLBUS MODULE™ IF DISPLAY IS TO
A CABINET DOOR.

B

C (GND)

23

1

1

23

B

C (GND)

+13 VDC

4

4

+13 VDC

RESET

5

5

RESET

SWITCH

3

2

M5285C

Fig. 7. Wiring keyboard display module for remote

mounting.

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),
see Fig. 8. The extreme right side of the first line will be either
blank or will show a small arrow pointing to the second line
followed by a two-letter code (DI—Diagnostic Information,
Hn—Fault History Information (where n equals the number of
the fault), and EA—Expanded Annunciator). When the arrow
and two-letter code are displayed, it indicates the second line
is showing a selectable message submenu. 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. It also replaces a selectable
message after 60 seconds if it or a lockout message is

65-0090—3 6

FIVE WIRE CONNECTOR FOR
COMMUNICATIONS, REMOTE KEYBOARD

DI = DIAGNOSTICS
H1 = HISTORY
EA = EXPANDED ANNUNCIATOR

SEQUENCE
STATUS

SELECTABLE
MESSAGE OR
PREEMPTIVE
MESSAGE

DISPLAY AND REMOTE RESET

M7412

Fig. 8. S7800 Keyboard Display Module.

Keyboard Functions

The keyboard contains four push-buttons with separate
functions (SCROLL-down, SCROLL-up, MODE, and
CHANGE-LEVEL). The MODE and CHANGE-LEVEL, when
pressed together, provide a SAVE function.

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

1. SCROLL down-up push-buttons (◊). See Fig. 9. The

SCROLL down-up push-buttons (◊) are used to scroll
through the selectable messages. The double-headed
arrow (◊), which is located in the lower left position of
the second line of the display, represents the SCROLL
down-up push-buttons. The SCROLL down-up push­buttons (◊) can be pressed to display the selectable
messages one at a time or held down to scroll through
the selectable messages at the rate of two per second.
When the last item of the selectable message is
viewed, the display wraps around and displays the first
selectable message again.

2. CHANGE-LEVEL push-button (↔), see Fig. 10. The

CHANGE-LEVEL push-button is used to change

BURNER CONTROL

RUN
Total Cycles 333

SCROLL

MODE

SAVE

between the first hierarchy of selectable messages to a
subset of selectable messages. The CHANGE-LEVEL
push-button can also be used to change from a subset
message to a first level selectable message. The
symbol (<), located on the second line in the lower right
corner of the display, represents a subset of selectable
messages.

3. MODE push-button, see Fig. 11. Use the MODE push­button to instantaneously switch the display from a
second-line selectable message to a second-line
preempted message. The sixty second time-out
function can also be used for this task. The MODE
push-button only works if there is a second-line
preempted message or a lockout message.

BURNER CONTROL

RUN
Total Hours 1332

SCROLL

MODE

SAVE

Fig. 9. (

BURNER CONTROL

PILOT IGN 00:05
Fault History

SCROLL

MODE

SAVE

Fig. 10. (

BURNER CONTROL

LOCKOUT 17 DI
Main Valve T9 = O

◊) SCROLL push-button function.

BURNER CONTROL

PILOT IGN 00:10 H1
Fault Cycle 174

SCROLL

÷ ) CHANGE-LEVEL push-button function.

BURNER CONTROL

LOCKOUT 17
*Main Flame Fail*

M1932A

MODE

SAVE

M1933A

SCROLL

MODE

SAVE

Fig. 11. MODE push-button function.

SCROLL

MODE

SAVE

M1934C

65-0090—37

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

4. SAVE function, see Fig. 12. The SAVE function enables
users to identify the selectable message they want to
view upon power restoration. The second line
selectable message are restored to the most recently
saved selection when power returns. The SAVE
function is performed is by pressing and holding the
MODE key and then pressing the CHANGE-LEVEL key
(↔). The second line of the display briefly notes
“…SAVING…” to confirm the keys were pressed.

BURNER CONTROL

PURGE 00:30
... SAVING ...

Selectable Messages

For the second line display, two-level hierarchy, see Table 3.

SCROLL

MODE

SAVE

The display values are as follows:

n represents a numbered value.
T represents the terminal number.

M1935A

x represents the suffix letter of the Relay Module.

Fig. 12. SAVE function.

Table 3. Selectable Messages.

Selectable

Message/Display Description

Flame Signal Flame signal strength. 0 - 5.0 Vdc Flame

Total Cycles Total number of equipment

operating cycles.

Total Hours Total number of equipment

operating hours.

Possible States/

Range (Terminals) Comments

Flame relay pull-in and drop-out

Amp (+ and - (Com))
0 - 99,999

(250,000) cycles
0 - 99,999

(250,000) hours

a

value 1.25 Vdc.
Cycle will be updated each time

a

main valve is energized.
Hour will be updated each time

main valve output is energized for
60 minutes.

Fault History >
(Six most recent faults)

Fault Cycle H1 Cycle when fault occurred. 0 - 99,999 cycles

First level prompt for history
information. Has subset level.

——

—

(250,000) cycles

Fault Hours H1 Run hour when fault occurred. 0 - 99,999

(250,000) hours

Fault Code H1 Number that identifies the

0 - 999 —

a

—

reason for lockout.
*Fault Message* H1 Indicates cause of lockout. — —
Sequence Message H1 Indicates where in the sequence

——

the lockout occurred.
(Second Line Message) H1 Second line message explains

——
any further information that is
available from the 7800 SERIES
or may be blank if there is not a
preemptive second-line.
H2…H6 etc.

Diagnostic Information > First level prompt for diagnostic

——
information. Has subset level.

Device Device type number. RM78XXX or EC78XXX —
Device Suffix Device suffix number. nnnn —
Run/Test Sw. Position of Run/Test Switch. RUN or TEST Indicates if 7800 SERIES is in

RUN or TEST mode.

OperControl T6 Operating Control Input. = 1 or 0 Indicates if input is on or off,

energized or de-energized.

Interlock T7 Running/Lockout Interlock. = 1 or 0 Indicates if input is on (1) or off

(0), energized or de-energized.

a

European Approved Controls.

(continued)

65-0090—3 8

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 3. Selectable Messages (continued).

Selectable

Message/Display Description

Pilot Valve T8 Pilot Valve. = 1 or 0 Indicates if output terminal is on

Main Valve T9 Main Fuel Valve. = 1 or 0 Indicates if output terminal is on

Ignition

T10 Ignition.

LowFire Sw T18 Low Fire Switch. = 1 or 0 Indicates if input is on or off,

HighFireSw T19 High Fire Switch. = 1 or 0 Indicates if input is on or off,

PreIgn ILK T20 or T17a Preignition Interlock = 1 or 0 Indicates if input is on or off,

Valv/Start T21 Interrupted/Intermittent

Pilot Valve, First Stage Oil
Valve or Start Input.

Jumper 1 Pilot Flame Establishing Period

(PFEP).

First Safety Time (for
RM/EC7850).

Jumper 2 Pilot Valve. INTACT/CLIPPED Display shows state of Pilot

Main Trial Time (for
RM/EC7850).

Jumper 3 Start-up Airflow Switch (AFS)

check.

Amp Type Defines type of amplifier

installed.

Flame Response Amplifier Flame Failure

Response Time (FFRT) in
seconds.

Purge Time Timing value of purge card. mm:ss Two seconds to 30 minutes.

a

Preignition Interlock Terminal 17 or 20 is model dependent.

Possible States/

Range (Terminals) Comments

or off, energized or de-energized.

or off, energized or de-energized.

= 1 or 0 Indicates if output terminal is on

or off, energized or de-energized.

energized or de-energized.

energized or de-energized.

energized or de-energized.

= 1 or 0 Indicates if output is on or off,

energized or de-energized.

INTACT/CLIPPED Display shows state of PFEP

jumper. If jumper is intact, 7800
SERIES was 10 second PFEP. If
jumper is clipped, 7800 SERIES
has 4 second PFEP.

INTACT/CLIPPED Display shows state of First

Safety Time (EC7850) jumper. If
jumper is intact, EC7850 has 5
second First Safety Time. If
jumper is clipped, the EC7850
has 3 second First Safety Time.

Valve (terminal no. 21). If jumper
is intact, RM7800G has
Intermittent Pilot Valve. If jumper
is clipped, RM7800G has 15 or
30 second Interrupted Pilot
Valve.

INTACT/CLIPPED Display shows state of Main Trial

Time (EC7850)Valve (terminal no.

21). If jumper is intact, EC7850
has 5 second Main Trial Time. If
jumper is clipped, EC7850 has 3
second Main Trial Time.

INTACT
Disabled/CLIPPED
Enabled

Display shows state of Start-up
AFS check jumper. If jumper is
clipped, RM7800 AFS check is
enabled and if jumper is intact,
AFS check is disabled.

STANDARD/AMP­CHECK/SHUTTER

Display shows type of flame
detection system installed (i.e.,
as STANDARD, AMP­CHECK/AMPLI-CHECK™ and
SHUTTER/ Dynamic Self­Checking).

.8s, 1s, 2s, or 3s —

(continued)

65-0090—39

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 3. Selectable Messages (continued)

Selectable

Message/Display Description

Mfg Code Manufacturing code is five digit

number representing date code.

SW Rev. Software revision and version

code for 7800 SERIES and
Keyboard Display Module.

Expanded Annunciator First level prompt for history

information. Has subset level;
see Table 2.

Remote Command Status of firing rate command

from remote controller.

Expanded Annunciator Messages (Table 4)

Possible States/

Range (Terminals) Comments

nnnnn —

nnnn/nnn —

——

NONE/HOLD HF/LF —

The Expanded Annunciator (EA) may or may not be
connected because it is an optional device. If the EA is not
connected, a display message of “(EA not connected)” is
shown. If the EA is connected, display messages are shown;

Table 4. Expanded Annunciator.

Selectable Messagea (Second Line) Display Value (Second Line)

↕Expanded Annun.↔

↕Expanded Annunciator (EA not connected)<
↕Current Status (CS:)

↕Valve Closure (Valve Close) T4 =1 or 0< ↓EA
↕Burner Switch (Burner Sw.) T5 =1 or 0< ↓EA
↕Operating Control (OperControl) T6 =1 or 0< ↓EA
↕Auxiliary Limit (Aux Limit 1) T7 =1 or 0< ↓EA
↕Auxiliary Limit (Aux Limit 2) T8 =1 or 0< ↓EA
↕Low water Cutoff (LWCO) T9 =1 or 0< ↓EA
↕High Limit (High Limit) T10 =1 or 0< ↓EA
↕Auxiliary Limit (AuxLimit 3) T11 =1 or 0< ↓EA
↕Oil Selection Switch (Oil Select) T12 =1 or 0< ↓EA
↕High Oil Pressure Switch (Hi OilPres) T13 =1 or 0< ↓EA
↕Low Oil Pressure Switch (LowOilPres) T14 =1 or 0< ↓EA
↕High Oil Temperature Switch (Hi OilTemp) T15 =1 or 0< ↓EA
↕Low Oil Temperature Switch (LowOilTemp) T16 =1 or 0< ↓EA
↕Atomizing Switch (Atomize Sw) T19 =1 or 0< ↓EA
↕Gas Selection Switch (Gas Select) T17 =1 or 0< ↓EA
↕High Gas Pressure Switch (Hi GasPres) T18 =1 or 0< ↓EA
↕Low Gas Pressure Switch (LowGasPres) T19 =1 or 0< ↓EA
↕Airflow Switch (Airflow Sw) T20 =1 or 0< ↓EA
↕Auxiliary Interlock (Aux ILK 4) T21 =1 or 0< ↓EA
↕Auxiliary Interlock (Aux ILK 5) T22 =1 or 0< ↓EA
↕EA Fault Code nnn< ↓EA
↕Software Revision (SW Rev.) nnnn< ↓EA

a

see Table 4 (Note that 1 means ON and 0 means OFF).
When accessing Expanded Annunciator messages, follow the
same operations as used with the Selectable messages.

b

EA Message< ↓EA

First Line Message

65-0090—3 10

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

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.

Table 5. Keyboard Display Module Sequence and Status Hold Messages.

Sequence Status

INITIATE mm:ss The Keyboard Display Module (KDM) indicates the burner status, INITIATE, a stabilization period

If the relay module is in an INITIATE HOLD status, the following conditions could exist:
INITIATE HOLD:

(AC Frequency/Noise)

INITIATE HOLD:
(AC Line Dropout)

INITIATE HOLD:
(AC Frequency)

INITIATE HOLD:
(Low Line Voltage)

STANDBY The KDM indicates the burner status, STANDBY. The burner can be placed in STANDBY by

If the relay module is in a STANDBY HOLD status, the following conditions could exist:
STANDBY HOLD:

F/G (Flame Detected)

STANDBY HOLD: T20
(Preignition Interlock)

STANDBY HOLD: T7
(Lockout Interlock)

for the relay module to check for any fluctuations in ac line voltage inputs or control inputs on
power up or during normal operation. The timing of the INITIATE period is either two seconds or
ten seconds, depending on the model, before entering STANDBY.

The KDM indicates the burner status and that it is waiting for excess line noise to clear up, which
prevents sufficient reading of the line voltage inputs. The burner sequence does not advance
into STANDBY until the excess line noise ceases or a line frequency error occurs; this is
caused by using a 60 Hz device on a 50 Hz line, or vice versa on devices with a date code
earlier than 9804, is corrected.

The KDM indicates the burner status and that ac line power has momentarily dropped out. The
burner sequence does not advance into STANDBY until the ac line voltage has stabilized
throughout the INITIATE sequence.

The KDM indicates the burner status and that line frequency is faster than the expected value.
The burner sequence does not advance into STANDBY until the line frequency returns to the
proper value; this is perhaps caused by using a 60 Hz device on a 50 Hz line for devices with a
date code earlier than 9804.

The KDM indicates the burner status and that low line voltage (10% lower than rated voltage) has
occurred. The burner sequence does not advance into STANDBY until the line voltage is at a
sufficient level for proper operating parameters.

opening the burner switch or if the operating controller indicates its setpoint is satisfied. If a
demand is present for burner operation, the burner sequence does not advance from STANDBY
to PURGE until the recycle limits close. If an Expanded Annunciator is connnected, the display
messages are enhanced.

The KDM indicates the burner status and that a flame is detected. A demand is present for
burner operation. The sequence does not advance to PREPURGE until the flame signal clears.
If the flame signal does not clear within 40 seconds, the relay module locks out.

The KDM indicates the burner status and that the Preignition Interlock is not closed. A demand
is present for burner operation, but the burner sequence does not advance to PREPURGE until
the Preignition Interlock proves closed. If this time exceeds a 30 second hold, the relay module
locks out.

The KDM indicates the burner status and that the Lockout Interlock is closed. A demand is
present for burner operation, but the burner sequence does not advance to PREPURGE until
the Lockout Interlock proves open. If this time exceeds the 120 second hold, the relay module
locks out.

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, PREIGNITION, 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-and­error testing.

Table 5 provides the sequence and status hold messages.

(continued)

65-0090—311

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 5. Keyboard Display Module Sequence and Status Hold Messages (continued).

Sequence Status

STANDBY HOLD: T7
(Running Interlock)
T17 for EC/RM7810,
7820, EC/RM7830,
7850 devices

PURGE The KDM indicates the burner status, PURGE, which is the period of time the blower motor is

If the relay module is in a PURGE HOLD status, the following conditions could exist:
PURGE HOLD: T19

(High Fire Switch)

PURGE DELAY: T19
(High Fire Switch
Jumpered)

PURGE HOLD: TEST
(Run/Test Switch)

PURGE HOLD: T18
(Low Fire Switch
Jumpered)

PURGE HOLD: F/G
(Flame Detected)

PURGE HOLD: T18
(Low Fire Switch)

PURGE HOLD: T7
(Running Interlock)

PILOT IGN mm:ss The KDM indicates the burner status, PILOT IGN, and the timing of the PILOT IGN trial begins,

If the relay module is in a PILOT HOLD status, the following condition could exist:
PILOT HOLD: TEST

(Run/Test Switch)

MAIN IGN mm:ss The KDM indicates the burner status, MAIN IGN, and the timing of the MAIN IGN trial begins, in

RUN The KDM indicates the burner status, RUN, which is the period of time after the Ignition Trials

If the relay module is in a RUN HOLD status, the following condition could exist:
RUN LOWFIRE:

TEST (Run/Test
Switch)

POSTPURGE mm:ss The KDM indicates the burner status, POSTPURGE, which is the period of time after the RUN

Waiting for
connection...

The KDM indicates the burner status and that the Running Interlock is closed. A demand is
present for burner operation, but the burner sequence does not advance to PREPURGE until
the Running Interlock proves open. If this time exceeds the 120 second hold, the relay module
locks out.

running before the Ignition period. The timing of the PURGE period is selectable.

The KDM indicates the burner status and that the High Fire Switch is not closed. The firing rate
motor is driving to its PURGE rate position. If this time exceeds four minutes and fifteen
seconds, the relay module locks out.

The KDM indicates the burner status and that the High Fire Switch is jumpered. The High Fire
Switch is bypassed, welded or otherwise prematurely closed. The system automatically adds 30
seconds to allow the firing rate motor additional drive time to reach or near the open damper
position before starting the PURGE sequence.

The KDM indicates the burner status and that the Run/Test Switch is in the TEST position. The
sequence does not continue until the Run/Test Switch is placed in the RUN position.

The KDM indicates the burner status and that the Low Fire Switch is jumpered. The Low Fire
Switch is bypassed, welded or otherwise prematurely closed. The system automatically adds 30
seconds to allow the firing rate motor additional drive time to reach or near the closed damper
position before starting the ignition sequence.

The KDM indicates the burner status and that a flame is detected. The burner sequence does
not advance through PREPURGE because a flame is detected as being present. The sequence
holds waiting for the flame signal to clear. If the time exceeds 30 seconds, the relay module
locks out.

The KDM indicates the burner status and that the Low Fire Switch is not closed. The firing rate
motor is driving to its Low Fire position in preparation for Ignition Trials. If this time exceeds four
minutes and fifteen seconds, the relay module locks out.

The KDM indicates the burner status and that the Running Interlock is not closed. The sequence
does not advance to ignition until the Running Interlock proves closed. If this time exceeds 30
seconds, the relay module locks out.

in seconds. During this period, the relay module permits the pilot valve to open and the pilot
flame to establish.

The KDM indicates the burner status, PILOT IGN, and that the Run/Test Switch is in the TEST
position. The sequence does not continue until the Run/Test Switch is placed in the RUN
position.

seconds. During this period, the relay module permits the main valve to open and the main
flame to establish.

and before the operating controller setpoint is reached. During this time, the burner is firing
under control of the firing rate control.

The KDM indicates the burner status and that the Run/Test Switch is in the TEST position.
Normal modulation or operation does not continue until the Run/Test Switch is placed in the
RUN position.

period when the blower motor continues to run. The timing of the POSTPURGE period is fifteen
seconds.

The KDM has power but is waiting to receive a signal from the relay module to continue
operation.

(continued)

65-0090—3 12

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 5. Keyboard Display Module Sequence and Status Hold Messages (continued).

Sequence Status

If the relay module is in a RUN HOLD status, the following condition could exist (continued):
RESET/ALARM TEST The KDM indicates the burner status, RESET/ALARM TEST. This condition indicates that the

Additional Sequence Status Information When An Expanded Annunciator Is Connected To The Relay Module:
BURNER OFF: T6

(Burner Switch)
STANDBY The KDM indicates the burner status, STANDBY, and that the Operating Control is not closed.

STANDBY HOLD: T6
(EA Hold Message)

STANDBY HOLD: T6
(Circuit Fault)

reset button is pressed. If it is held for more than four seconds, the alarm output is energized.
The alarm output is de-energized when the reset button is released.

The KDM indicates the Burner Switch is not closed. The burner sequence does not advance to
PREPURGE until the Burner Switch closes.

The burner sequence does not advance to PREPURGE until the Operating Control closes.
The KDM indicates the burner status, STANDBY, and that a limit is not closed. The burner

sequence does not advance to PREPURGE until one or all limits close downstream from the
Operating Control.

The KDM indicates the burner status, STANDBY, and that the control input is not closed. The
burner sequence does not advance to PREPURGE until the control input closes.

The S7800 provides diagnostic information to aid the service
mechanic in obtaining information when troubleshooting the
system. See Table 6 for information on accessing historical
and diagnostic selectable messages. Information available in
the Diagnostic Information includes Device Type, Device
Suffix, Software Revision, Manufacturing Code, Flame
Amplifier Type, Flame Failure Response Time (FFRT),
Selectable Jumper Configuration Status, Run/Test Switch
Status and Terminal Status.

Table 6. Accessing Historical and Diagnostic Selectable Messages.

Step Operation Press Display Comments

1. Press SCROLL key to access
Diagnostic Information.

2. Press Change Level key to
Access Diagnostic Information.

3. Continue display of Diagnostic
Information.

4. Continue through remaining
Diagnostic Information display
following step 3 as required.

5. Press the Change Level key to
return to the first level of
Diagnostic Information data
prompt or to other selectable
messages.

(↕) STANDBY

↕Diagnostic Info>

(↔) STANDBY

↕Diagnostic Info>

(↕) STANDBY DI

↕Device RM7800<

—— —

(↔) STANDBY

↕Diagnostic Info>

Historical Information Index

The S7800 displays historical information for the six most
recent lockouts. Each of the six lockout records retains the
cycle when the fault occurred, a fault code, a fault message,
and burner status when the fault occurred. See Table 7.

Use the Down/Up SCROLL keys to access the
selectable message. The second line will display
Diagnostic Information.

Use the Change Level key to access the
Diagnostic Information.

Push the (↕) SCROLL key to scroll to the next
Diagnostic Message.

Another display can be selected or discontinue
accessing Diagnostic Information review.

65-0090—313

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 7. Selectable Messages (see Table 1).

Selectable

Message/Display Description

Flame Signal Flame signal strength. 0 - 5.0 Vdc Flame

Total Cycles Total number of equipment

operating cycles.

Total Hours Total number of equipment

operating hours.

Fault History >
(Six most recent faults)

First level prompt for history
information. Has subset level.

Fault Cycle H1 Cycle when fault occurred. 0 - 99,999 cycles

Fault Hours H1 Run hour when fault occurred. 0 - 99,999

Fault Code H1 Number that identifies the

reason for lockout.
*Fault Message* H1 Indicates cause of lockout. — —
Sequence Message H1 Indicates where in the

sequence the lockout

occurred.
(Second Line Message) H1 Second line message explains

any further information that is

available from the 7800

SERIES or may be blank if

there is not a preemptive

second-line. H2…H6 etc.
Diagnostic Information > First level prompt for

diagnostic information. Has

subset level.
Device Device type number. RM78XXX or EC78XXX —
Device Suffix Device suffix number. nnnn —
Run/Test Sw. Position of Run/Test Switch. RUN or TEST Indicates if 7800 SERIES is in

OperControl T6 Operating Control Input. = 1 or 0 Indicates if input is on or off,

Interlock T7 Running/Lockout Interlock. = 1 or 0 Indicates if input is on or off,

Pilot Valve T8 Pilot Valve. = 1 or 0 Indicates if output terminal is on

Main Valve T9 Main Fuel Valve. = 1 or 0 Indicates if output terminal is on

Ignition T10 Ignition. = 1 or 0 Indicates if output terminal is on

LowFire Sw T18 Low Fire Switch. = 1 or 0 Indicates if input is on or off,

HighFireSw T19 High Fire Switch. = 1 or 0 Indicates if input is on or off,

PreIgn ILK T20 or

T17

Preignition Interlock. = 1 or 0 Indicates if input is on or off,

a

Valv/Start T21 Interrupted/Intermittent Pilot

Valve, First Stage Oil Valve or

Start Input.

Possible States/

Range (Terminals) Comments

Flame relay pull-in and drop-out

Amp (+ and - (Com))
0 - 99,999

(250,000) cycles
0 - 99,999

(250,000) hours

value 1.25 Vdc.
Cycle will be updated each time

main valve is energized.
Hour will be updated each time

main valve output is energized for
60 minutes.

——

—

(250,000) cycles

—

(250,000) hours
0 - 999 —

——

——

——

RUN or TEST mode.

energized or de-energized.

energized or de-energized.

or off, energized or de-energized.

or off, energized or de-energized.

or off, energized or de-energized.

energized or de-energized.

energized or de-energized.

energized or de-energized.

= 1 or 0 Indicates if output is on or off,

energized or de-energized.

(continued)

65-0090—3 14

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 7. Selectable Messages (continued).

Selectable

Message/Display Description

Jumper 1 Pilot Flame Establishing

Period (PFEP).

First Safety Time (for
EC7850).

Jumper 2 Pilot Valve. INTACT/CLIPPED Display shows state of Pilot

Main Trial Time (for EC7850). INTACT/CLIPPED Display shows state of Main Trial

Jumper 3 Start-up Airflow Switch (AFS)

check.

Amp Type Defines type of amplifier

installed.

Flame Response Amplifier Flame Failure

Response Time (FFRT) in

seconds.
Purge Time Timing value of purge card. mm:ss Two seconds to 30 minutes.
Mfg Code Manufacturing code is five

digit number representing date

code.
SW Rev. Software revision and version

code for 7800 SERIES and

Keyboard Display Module.
Expanded Annunciator First level prompt for history

information. Has subset level;

see Table 2.
Remote Command Status of firing rate command

from remote controller.

Possible States/

Range (Terminals) Comments

INTACT/CLIPPED Display shows state of PFEP

INTACT/CLIPPED Display shows state of First

INTACT
Disabled/CLIPPED
Enabled

STANDARD/AMP­CHECK/SHUTTER

.8s, 1s, 2s, or 3s —

nnnnn —

nnnn/nnn —

——

NONE/HOLD HF/LF —

jumper. If jumper is intact, 7800
SERIES was 10 second PFEP. If
jumper is clipped, 7800 SERIES
has 4 second PFEP.

Safety Time (EC7850) jumper. If
jumper is intact, EC7850 has 5
second First Safety Time. If
jumper is clipped, the EC7850
has 3 second First Safety Time.

Valve (terminal no. 21). If jumper
is intact, RM7800G has
Intermittent Pilot Valve. If jumper
is clipped, RM7800G has 15 or
30 second Interrupted Pilot
Valve.

Time (EC7850)Valve (terminal no.

21). If jumper is intact, EC7850
has 5 second Main Trial Time. If
jumper is clipped, EC7850 has 3
second Main Trial Time.

Display shows state of Start-up
AFS check jumper. If jumper is
clipped, RM7800 AFS check is
enabled and if jumper is intact,
AFS check is disabled.

Display shows type of flame
detection system installed (i.e.,
as STANDARD, AMP­CHECK/AMPLI-CHECK™ and
SHUTTER/ Dynamic Self­Checking).

65-0090—315

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

SERVICE NOTE: If the KDM is scrambled, remove and

reinstall the KDM and reset the 7800
SERIES Relay Module. Reset the 7800
SERIES Relay Module by pressing the
RESET button on the relay module, or
pressing the remote reset push-button
wired through the KDM, Data
ControlBus™ Module or Remote Reset
Module. A power-up reset causes an
electrical reset of the 7800 SERIES
Relay Module but does not reset a
lockout condition.

Lockout Messages

When the 7800 SERIES is locked out, it displays a repeating
cycle of messages. See Table 8. There are four states in the
cycle:

1. State 1 (Fig. 13). A first state message display lasts six
seconds. First line displays the word LOCKOUT
followed by the fault code number and possibly a lower
case letter if an Expanded Annunciator is connected.
The letter corresponds to the first-out code supplied by
the Expanded Annunciator. The lockout reason
corresponding to the fault code number is displayed on
the second line, highlighted by asterisks on each side.

2. State 2 (Fig. 14). Display of the second state message
lasts two seconds.

BURNER CONTROL

Condition at the
time of lockout ...

SCROLL

MODE

SAVE

M1992A

Fig. 14. Lockout message, State 2.

3. State 3 (Fig. 15). Display of the third state message

lasts three seconds. It is a replica of the burner status
as it existed at the time of the lockout. The second line
is blank if the burner status at the time of lockout did
not include a preemptive message (in parentheses) for
the second line.

BURNER CONTROL

LOCKOUT 23p
*Airflow Sw.*

SCROLL

MODE

SAVE

Fig. 13. Lockout message, State 1.

M1991C

BURNER CONTROL

PURGE
(Airflow Sw.)

SCROLL

MODE

SAVE

M1993C

Fig. 15. Lockout message, State 3.

4. State 4: In the fourth state, both lines are blanked for

one-half second, then the display sequences to the first
state.

NOTE: For further explanation of Lockout Messages,

Troubleshooting and Checkout, refer to
form 65-0229.

65-0090—3 16

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary.

Fault Code System Failure Recommended Troubleshooting

Fault 1

*No Purge Card*

Fault 2

*AC Frequen/Noise*

Fault 3

*AC Line Dropout*

Fault 4

*AC Frequency*

Fault 5

*Low Line Voltage*

Fault 6

*Purge Card Error*

Fault 7

*Flame Amplifier*

Fault 8

*Flame Amp/Shutr*

Fault 9

*Flame Detected*

Fault 10

*Preignition ILK*

Fault 11

*Running ILK On*

No card is plugged into
the purge card slot.

Excess noise or device
running on slow ac.

Ac line dropout
detected.

Device running on fast
ac.

Low ac line detected.

Purge card timing
changed since card was
initially read.

Flame sensed when
flame not present.

Flame sensed when no
signal expected during
shutter-check or Ampli­Check™ versions.

Flame sensed when no
flame is expected
during STANDBY.

Preignition Interlock
fault during STANDBY
*EC/RM7800, 7840,
7838B only).

Running Interlock
powered at improper
sequence point.

1. Make sure the purge card is seated properly.

2. Inspect the purge card and connector on the relay module for
damage or contaminants.

3. Reset and sequence the relay module.

4. If the fault code reappears, replace the purge card.

5. Reset and sequence the relay module.

6. If the fault persists, replace the relay module.

1. Check the relay module and display module connections.

2. Reset and sequence the relay module.

3. Check the relay module power supply and make sure that both
frequency and voltage meet the specifications.

4. Check the backup power supply, as appropriate.

1. Make sure the purge card is seated properly.

2. Inspect the purge card and connector on the relay module for
damage or contaminants.

3. Reset and sequence the relay module.

4. If the fault code reappears, replace the purge card.

5. Reset and sequence the relay module.

6. If the fault persists, replace the relay module.

1. Check wiring and correct any errors. Make sure that flame sensor
wires are in separate conduits. Check for noise coupling into the
flame detector leadwires.

2. Make sure that flame detector and flame amplifier are compatible.

3. Remove the flame amplifier and inspect connections. Reseat the
amplifier.

4. Reset and sequence the relay module.

5. If the code reappears, replace the amplifier.

6. If the fault persists, replace the flame detector.

7. If the fault persists, replace the relay module.

1. Check that flame is not present in the combustion chamber;
correct any errors.

2. Check wiring and correct any errors. Make sure that flame sensor
wires are in separate conduits. Check for noise coupling into flame
detector leadwires.

3. Remove the flame amplifier and inspect its connections. Reseat
the amplifier.

4. Reset and sequence the relay module.

5. If the code reappears, replace the amplifier and/or the flame
detector.

6. If the fault persists, replace the flame detector.

7. If the fault persists, replace the relay module.

1. Check wiring and correct any errors.

2. Check Preignition Interlock switches to assure proper functioning.

3. Check fuel valve operation.

4. Reset and sequence the relay module; monitor the Preignition
Interlock status.

5. If the code persists, replace the relay module.

1. Check wiring to make sure that interlocks are connected properly
between terminals 6 and 7. Correct any errors.

2. Reset and sequence the relay module.

3. If the fault persists, measure the voltage between terminals 6 and
L2(N) (ground), then terminals 7 and L2(N). If there is line supply
voltage present at terminal 6 when the controller is off, the
controller switch may be bad or is jumpered.

(continued)

65-0090—317

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 12

*Lockout ILK On*

Fault 13

*Airflow Sw. On*

Fault 14

*High Fire Sw.*

Fault 15

*Flame Detected*

Fault 16

*Flame-Out Timer*

Fault 17

*Main Flame Fail*

Fault 18

*Flame Detected*

Lockout Interlock
powered at improper
point in sequence.

Combustion airflow
interlock fault during
STANDBY.

High Fire Interlock
Switch failure to close
during PREPURGE.

Flame sensed when no
flame is expected
during STANDBY.

No-flame detected
during Pilot Flame
Establishing Period.

Main flame failure
during RUN after flame
is established and on
for at least 10 seconds.

Flame sensed when
shutter is open and no
flame is expected
during PREPURGE.

4. If steps 1 through 3 are correct and there is line supply voltage
present at terminal 7 when the controller is closed and the fault
persists, check for a welded or jumpered Running Interlock, Lockout
Interlock, or Airflow Switch. Correct any errors.

5. If steps 1 through 4 are correct and the fault persists, replace the
relay module.

1. Check wiring and correct any errors.

2. Reset and sequence the relay module.

3. Use either the manual motor potentiometer to drive the motor to
the High Fire position or use the Run/Test Switch option, if
available. Sequence to Prepurge drive to High Fire and place in the
Test position. Adjust the High Fire Switch while in this state to
make sure that it closes properly.

4. Measure the voltage between terminal 19 and L2(N) while in the
Prepurge drive to High Fire state. Line supply voltage should be
present. If not, the switch adjustment is incorrect and/or the switch
is defective and needs replacing.

5. Reset and sequence the relay module. If line supply voltage was
present between the High Fire Switch and terminal 19, and the fault
still persists, replace the relay module.

1. Check that the flame is not present in the combustion chamber;
correct any errors.

2. Make sure that the flame amplifier and flame detector are
compatible.

3. Check wiring and correct any errors.

4. Remove the flame amplifier and inspect the connections. Reseat
the amplifier.

5. Reset and sequence the relay module.

6. If the code reappears, replace the amplifier and/or the flame
detector.

7. If the fault persists, replace the relay module.

1. Measure the flame signal. If one exists, make sure it meet
specifications. Make any necessary burner adjustments using
manufacturer instructions.

2. Make sure that the flame amplifier and flame detector are
compatible.

3. If the code reappears, replace the amplifier and/or the flame
detector.

4. If the fault persists, replace the relay module.

1. Inspect the main fuel valve(s) and connection(s).

2. Make sure that the fuel pressure is high enough to supply fuel to
the combustion chamber.

3. Check the flame detector sighting for adequate flame signal
throughout the burner firing rate.

1. Check that flame is not present in the combustion chamber.
Correct any errors.

2. Make sure that the flame amplifier and flame detector are
compatible.

3. Check the wiring and correct any errors. Make sure F and G wires
are in individual conduits and protected from stray noise pickup.

4. Remove the flame amplifier and inspect the connectors. Reseat
the flame amplifier.

5. Reset and sequence the relay module.

6. If the code reappears, replace the flame amplifier and/or the flame
detector.

7. If the fault persists, replace the relay module.

(continued)

65-0090—3 18

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 19

*Main Flame Ign.*

Fault 20

*Low Fire Sw. Off*

Fault 21

*Running ILK*

Fault 22

*Lockout ILK*

Fault 23

*Airflow Switch*

Fault 24

*Call Service*

Fault 25

*Call Service*

Fault 26

*Man-Open Sw. Off*

Fault 27

*Start Switch On*

Flame was lost during
MFEP or the first 10
seconds of the RUN
state.

Low Fire Interlock switch
failure to close during
PREPURGE.

Running Interlock fault
during PREPURGE.

Lockout Interlock fault
during PREPURGE.

Combustion airflow
interlock fault during
PREPURGE.

The flame interlock
(relay module) was on
when it should be off.

The flame interlock
(relay module) was off
when it should be on.

The Manual Open Valve
Switch was off when it
should be on (RM7838B
only).

Start Switch was on
during PREPURGE
(RM7838A, RM7838B
only).

1. Inspect the main fuel valve(s) and connection(s).

2. Make sure that the fuel pressure is high enough to supply fuel to
the combustion chamber.

3. Make sure the flame detector is positioned to obtain the required
flame signal strength; reset and recycle.

1. Check wiring and correct any errors.

2. Reset and sequence the relay module.

3. Use either the manual motor potentiometer to drive the motor to
the Low Fire position or use the Run/Test Switch option, if
available. Sequence to Prepurge drive to Low Fire and place in the
Test position. Adjust the Low Fire Switch to make sure that it
closes properly.

4. Measure the voltage between terminal 18 and L2(N) while in the
Prepurge drive to Low Fire state. Line supply voltage should be
present. If not, the switch adjustment is incorrect and/or the switch
is defective and needs replacing.

5. Reset and sequence the relay module. If line supply voltage was
present between the Low Fire Switch and terminal 18, and the fault
still persists, replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the fan; make sure there is no blockage of the air intake
and that it is supplying air.

3. Make sure the Interlock Switches are working properly and that all
switch contacts are free of contaminants.

4. Reset and sequence the relay module to PREPURGE (place the
Run/Test Switch in the Test position, if available). Measure the
voltage between terminals 7 and L2(N). Line voltage should be
present.

5. If steps 1 through 4 are correct and the fault persists, replace the
relay module.

1. Check for F leadwire routing. Make sure routing is in its conduit and
isolated from noise-producing circuits.

1. Check wiring and correct any errors.

2. Make sure that the Manual Open Valve Switch is fully open.

3. Make sure that the Manual Open Valve Switch is functioning
properly and that the switch contacts are free from contaminants.

4. Reset and sequence the relay module.

5. Make sure that the Manual Open Valve Switch provides an electrical
path when closed. Verify that the relay module is receiving power at
terminal 17.

6. If steps 1 through 5 are correct and the fault persists, replace the
relay module.

1. Start Switch held on too long.

2. Check wiring; verify that Start Switch is correctly connected.

3. Make sure that the Start Switch is functioning properly and that the
switch contacts are free of contaminants.

4. Reset and sequence the relay module to PREPURGE; set the
Run/Test Switch to Test. Make sure there is no power at terminal 6
during PREPURGE.

5. If steps 1 through 3 are correct and the fault persists, replace the
relay module.

(continued)

65-0090—319

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 28

*Pilot Flame Fail*

Fault 29

*Lockout ILK*

Fault 30

*Running ILK*

Fault 31

*Low Fire Sw. Off*

Fault 32

*Airflow Switch*

Pilot flame failure. 1. Check pilot valve wiring and operation. Correct any errors.

Lockout Interlock fault. 1. Check wiring; correct any errors.

Running Interlock fault. 1. Inspect the Running Interlocks, including the Airflow Switch, and the

Low Fire Interlock
Switch failure to close
during RUN (RM7838B
only).

Combustion Airflow
Interlock fault.

2. Check fuel supply.

3. Check pilot pressure and repeat pilot turndown test.

4. Check ignition transformer electrode, flame detector, flame
detector sighting and flame amplifier.

5. If steps 1 through 4 are correct and the fault persists, replace the
relay module.

2. Inspect the fan; make sure that there is no blockage of the air
intake and that it is supplying air.

3. Make sure that the Lockout Interlock Switches are working properly
and that all switch contacts are free of contaminants.

4. Reset and sequence the relay module to PREPURGE (place the
Run/Test Switch in the Test position, if available). Measure the
voltage between terminals 7 and L2(N). Line voltage should be
present.

5. If steps 1 through 4 are correct and the fault persists, replace the
relay module.

connections.

2. Make sure that the Running Interlocks, including the Airflow Switch,
are functioning properly and that switch contacts are free of
contaminants.

3. Reset and sequence the relay module to PREPURGE. Set the
Run/Test Switch, if available, to Test. Measure the voltage between
terminal 7 and L2(N). Line voltage should be present.

4. If steps 1 through 3 are correct and the fault persists, replace the
relay module.

1. Check wiring; correct any errors.

2. Reset and sequence the relay module.

3. Use either the manual motor position to drive the motor to the Low
Fire position, or use the Run/Test Switch option, if available.
Sequence to Run drive to Low Fire and place in the Test position.
Adjust the Low Fire Switch while in this state to make sure it is
closing properly.

4. While in Run, drive to Low Fire state, measure the voltage between
terminal 18 and L2(N). Line voltage should be present. If not, the
switch adjustment is incorrect and/or the switch is defective and
needs replacement.

5. Reset and sequence the relay module. If line voltage was present
between the Low Fire Switch and terminal 18 and the fault persists,
replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the fan; make sure there is no blockage of the air intake
and it is supplying air.

3. Make sure the Airflow Interlock Switches are working properly and all
switch contacts are free of contaminants.

4. Reset and sequence the relay module to PREPURGE. Place the
Run/Test Switch in the Test position, if available. Measure the
voltage between terminals 7 and L2(N). Line voltage should be
present.

5. If steps 1 through 4 are correct and the fault persists, replace the
relay module.

(continued)

65-0090—3 20

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 33

*Preignition ILK*

Fault 34

*Control On*

Fault 35

*Call Service*

Fault 36

*Call Service*

Fault 37

*Call Service*

Fault 38

*Call Service*

Fault 39

*Call Service*

Fault 40

*Call Service*

Fault 41

*Main Valve On*

Fault 42

*Pilot Valve On*

Fault 43

*Ignition On*

Fault 44

*Pilot Valve 2 On*

Preignition interlock
fault.

CTL input was energized
at the wrong time for
the relay module. This
fault implies a field
wiring error.

Safety relay was off
when it should be on or
the internal fuse has
blown.

Main valve terminal was
off when it should be
on, or the internal fuse
has blown.

Pilot (ignition) valve
terminal was off when it
should be on, or the
internal fuse has blown.

Ignition terminal was off
when it should be on, or
the internal fuse has
blown.

V2S valve terminal
(usually terminal 21)
was off when it should
be on, or the internal
fuse has blown.

Safety relay was on
when it should be off.

Main valve terminal was
on when it should be
off.

Pilot (ignition) valve
terminal was on when it
should be off.

Ignition terminal was on
when it should be off.

V2S valve terminal,
used as a pilot, is on
when it should be off.

1. Check wiring; correct any errors.

2. Inspect the Preignition Interlock switches and make sure they
function properly.

3. Check fuel valve operation. Valve must close within five seconds.

4. Reset and sequence the relay module.

5. During STANDBY or PREPURGE, measure the voltage between
terminal 20 and L2(N). For EC/RM7810, 7820, EC/RM7830, 7850,
check voltage between terminal 17 and L2(N). Line voltage should
be present. If not, the Preignition Interlock switches can be
defective and need replacing.

6. If the fault persists, replace the relay module.

1. Check wiring; correct any errors.

2. Reset and sequence the relay module.

3. If fault persists, replace the relay module.

1. Reset and sequence the relay module. If fault repeats, replace
relay module, but be sure to test for excessive loads on
appropriate terminals described by fault code.

2. If fault does not repeat on next cycle check for electrical noise
being coupled into the relay module through the loads on
appropriate terminals described by the fault code.

3. If fault persists, replace the relay module.

WARNING

Explosion Hazard.
Can cause explosion, serious injury or death.

1. Remove system power, turn off fuel supply.

2. Check for wiring errors that could provide power to terminals
described by the fault. Correct any errors.

3. Re-power system; reset and sequence the relay module.

4. If fault persists, replace the relay module.

5. When fault is corrected, turn on fuel supply.

(continued)

65-0090—321

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 45

*Low Fire Sw. Off*

Fault 46

*Flame Amp Type*

Fault 47

*Jumpers Changed*

Fault 48
*Delayed MV On*
(2nd Stage Valve)

Fault 49

*Man-Open Sw. On.*

Low Fire Interlock switch
failure to close or stay
closed.

This fault indicates:
a. The Flame Failure

Response Time
(FFRT) or TYPE
input from the
amplifier changed
while the device
was powered; or

b. A standard

amplifier was used
in a pilot valve
application; or

c. A three-second

FFRT Amplifier was
used with the relight
option on the
RM7890 Relay
Module.

The configuration
jumpers differ from the
sample taken at
startup.

V2S valve terminal,
used as a delayed main
valve, was on when it
should be off.

The manual open switch
was on when it should
be off.

1. Check wiring; correct any errors.

2. Reset and sequence the relay module.

3. Use either the manual motor position to drive the motor to the Low
Fire position, or use the Run/Test Switch option, if available.
Sequence to Run, drive to Low Fire and place in the Test position.
Adjust the Low Fire Switch while in this state to make sure it is
closing properly.

4. While in Run, drive to Low Fire state, measure the voltage between
terminal 18 and L2(N). Line voltage should be present. If not, the
switch adjustment is incorrect and/or the switch is defective and
needs replacement.

5. If steps 1 through 4 are correct and the fault still persists, replace
the relay module.

1. Remove power to the device.

2. Reseat the flame amplifier and reset and sequence the relay
module.

3. For EC/RM7890 only; make sure that Jumper JR2 is completely
clipped if a three-second FFRT amplifier is being used. If Jumper
JR2 is intact (relight option is selected), use 0.8 second FFRT
amplifier.

4. For RM7838B only; make sure that a Shutter Check Flame
Amplifier is being used with the Pilot Valve Hold option selected.

1. Inspect the jumper connections. Make sure that clipped jumpers
are completely removed.

2. Reset and sequence the relay module.

3. If fault persists, replace the relay module.

WARNING

Explosion Hazard.
Can cause explosion, serious injury or death.

1. Remove system power, turn off fuel supply.

2. Check wiring; correct any errors.

3. Inspect the V2S Fuel Valve and its connections. Make sure
the switch is working correctly and is not jumpered or
welded.

4. Reset and sequence the relay module.

5. If fault persists, replace the relay module.

WARNING

Explosion Hazard.
Can cause explosion, serious injury or death.

1. Remove system power, turn off fuel supply.

2. Check wiring; correct any errors.

3. Inspect the Manual-Open Switch and its connections. Make
sure the switch is working correctly and is not jumpered or
welded.

4. Reset and sequence the relay module.

5. If fault persists, replace the relay module.

(continued)

65-0090—3 22

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 50

*Jumpers Wrong*

Fault 51

*Flame Too Strong*

Fault 52

*Call Service*

Fault 53

*Lockout Switch*

Fault 54

*Comb. Pressure*

Fault 55

*Purge Fan Sw. On*

Fault 56

*Block Intake*

Fault 57

*Purge Fan Sw. Off*

The sequence logic
detected a combination
of jumpers that is illegal
for the sequence eg, if
it is correct to clip
Jumper JR1 or Jumper
JR2, but not both, this
fault would be used
when both are clipped
(RM7888 only).

Flame signal value is
too high to be valid.

Pilot Valve 2 (terminal

21) was off when it
should be on.

Lockout Input fault
(EC7810, 7820,
EC/RM7830, 7850
only).

Combustion pressure
switch fault (Fulton
pulse only).

Purge fan switch is on
when it should be off
(Fulton pulse only).

Block intake fault
(Fulton pulse only).

Purge Fan Switch is off
when it should be on
(Fulton pulse only).

1. Inspect the jumpers and refer to the installation instructions for
compatible jumper configurations.

2. Make sure that clipped jumpers are completely removed.

3. Reset and sequence the relay module.

4. If fault persists, replace the relay module.

1. Make sure that flame detector and flame amplifier are compatible.

2. Remove the flame amplifier and inspect the connections. Reset
the flame amplifier.

3. Reset and sequence the relay module.

4. Check the flame detector sighting position, reset and cycle.

5. Verify that no ignition noise is present in the F lead due to wire
routing.

6. Measure the flame strength. Verify it meets specifications. If not,
refer to the flame amplifier and/or flame detector checkout
procedures.

7. If the code reappears, replace the flame amplifier.

8. If the code reappears, replace the flame detector.

9. If the fault persists, replace the relay module.

1. Inspect terminal 21 and connections. Make sure that the valve is
operating properly.

2. Reset and sequence the relay module.

3. If the fault persists, replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the Lockout Switch to make sure it is working properly.

3. Reset and sequence the relay module. During STANDBY or
PREPURGE, measure the voltage between terminal 20 and L2(N).
Supply voltage should be present. If not, the lockout switch is
defective and needs replacing.

4. If the fault persists, replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the Combustion Pressure Switch to make sure it is working
correctly.

3. Reset and sequence the relay module.

4. During STANDBY or PREPURGE, measure the voltage between
terminal 20 and L2(N). Supply voltage should be present. If not,
the Combustion Pressure Switch is defective and needs replacing.

5. If the fault persists, replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the Purge Fan Switch terminal 18 and its connections.
Make sure the switch is working correctly and is not jumpered or
welded.

3. Reset and sequence the relay module.

4. If the fault persists, replace the relay module.

1. Check wiring; correct any errors.

2. Inspect the Block Intake Switch and make sure it is working
properly.

3. Reset and sequence the relay module.

4. During PREPURGE, measure the voltage between terminal 7 and
L2(N). Supply voltage should be present. If not, the Block Intake
Switch is defective and needs replacing.

5. If the fault persists, replace the relay module.

1. Inspect the Prepurge Fan Switch terminal 18 and the connections.
Make sure the switch is working properly.

2. Reset and sequence the relay module.

3. If the fault persists, replace the relay module.

(continued)

65-0090—323

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Faults 58 - 66
*Call Service*

Fault 67

*AC Phase*

Fault 68

*Preignition ILK*

Fault 69 - 70

*Call Service*

Fault 71

*Dynamic LFS*

Fault 71

*Limits Complete*

Fault 72

*Dynamic HFS*

Fault 72

*Spec.Func.2*

Fault 73

*Spec.Func.3*

Fault 75

*Flame Proven

Feedback*

Fault 76 - 93

*Accessory Fault*

Fault 94 - 104
*Call Service*

Fault 105

*Call Service*

Unused faults —

L1 and L2
miswired/exchanged
(EC/RM7830, 7850
only).

Preignition Interlock
fault.

Unused faults. —

Low Fire Switch closed,
High Fire Switch must
be open
(EC/RM7850 only).

Limit input (terminal 7)
is off when it should be
on (RM7888 only).

High Fire Switch closed;
Low Fire Switch must be
open
(EC/RM7850 only).

Special Function 2
Input
(terminal 17) is off when
it should be on.
(RM7888 only)

Special Function 3
Input
(terminal 19) is off when
it should be on.
(RM7888 only)

Flame Indication
Feedback (terminal 21)
either on when it should
be off or off when it
should be on.
(RM7888 only)

——

——

Relay Module self-test
failure.

1. Check L1 and L2 for proper line phasing.

1. Check wiring; correct any errors.

2. Inspect the Preignition Interlock switches and make sure they work
properly.

3. Check fuel valve operation. Valve must close within five seconds.

4. Reset and sequence the relay module.

5. During STANDBY or PREPURGE, measure the voltage between
terminal 17 and L2(N). Supply voltage should be present. If not,
the Preignition Interlock switches are defective and need replacing.

6. If the fault persists, replace the relay module.

1. Check firing rate position switches (usually in Modutrol® Motor) for
proper operation.

2. Check wiring, correct any errors.

3. Reset and sequence the relay module.

4. If the fault persists, replace the relay module.

1. Check limits to make sure they are satisfied after resetting.

2. Check electrical connections to terminal 7 of wiring subbase.

3. Reset relay module.

4. If the fault persists, replace the relay module.

1. Check firing rate position switches (usually in Modutrol® Motor) for
proper operation.

2. Check wiring, correct any errors.

3. Reset and sequence the relay module.

4. If the fault persists, replace the relay module.

1. Check operation of Special Function 2 of PLC.

2. Check electrical connection to terminal 17 of wiring subbase and
confirm presence of supply power when Special
Function 2 is activated.

3. Reset relay module.

4. If the fault persists, replace the relay module.

1. Check operation of Special Function 3 of PLC.

2. Check electrical connection to terminal 19 of wiring subbase and
confirm presence of supply power when Special
Function 3 is activated.

3. Reset relay module.

4. If the fault persists, replace the relay module.

1. Remove wire to terminal 21 and reset relay module.

2. If the fault persists, replace relay module.

3. Reconnect wire to terminal 21. If the fault returns, verify wiring.

1. Reset and sequence the relay module.

2. If the fault reappears, remove power from the relay module

(continued)

65-0090—3 24

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

,

Table 8. Hold and Fault Message Summary (continued).

Fault Code System Failure Recommended Troubleshooting

Fault 106

*Call Service*

Fault 107

*Call Service*

Fault 109

*Call Service*

Fault 110

*Call Service*

Fault 111

*Call Service*

Fault 112 - 126

*Call Service*

Fault 127

*Call Service*

Relay Module self-test
failure.

Relay Module flame
signal crosscheck
failure.

Negative cycle test
failed, earth ground
absent or line voltage
phasing improper.

The configuration
jumpers differ from
stored values.

Relay Module
configuration jumper
test failure.

Relay Module self-test
failure.

Safety relay feedback
circuit was in an
improper state.

and reapply the power; reset and sequence the relay module.

3. If the fault persists, replace the relay module.

1. Make sure a good earth ground connection exists at the installation
site and all earth ground connections are complete and correct.

2. Make sure the relay module and all loads operate at the same line
voltage phase.

3. Reset and sequence the relay module.

4. If the fault persists, replace the relay module.

1. Inspect the jumper connections. Make sure they match the original
selection and clipped jumpers are completely removed.

2. Reset and sequence the relay module.

3. If the fault persists, replace the relay module.

4. Configuration jumpers must be selected prior to 200 hours of
operation. If configuration jumpers are changed after 200 hours of
operation, lockout 110 occurs. Relay module cannot be reset and
must be replaced.

1. Inspect the jumper connections. Make sure they match the original
selection and clipped jumpers are completely removed.

2. Reset and sequence the relay module.

3. If the fault persists, replace the relay module.

1. Reset and sequence the relay module.

2. If the fault persists, replace the relay module.

1. Reset and sequence the relay module.

2. If the fault persists, replace the relay module.

Expanded Annunciator Messages

If an Expanded Annunciator is wired to the limit control and
interlock control strings, and connected to the 7800 SERIES
Relay Module, additional hold messages, fault messages or
code numbers enhance the original hold messages, fault

Fig. 16. KDM flush mounting outline.

messages or code numbers. See the Expanded Annunciator
specification, form 65-0101, for detailed information. The
message demonstrates which device opened first in a
monitored string of limits or interlocks.

1/8 in. DIA. (2)
(3.175 mm)

M5082B

65-0090—325

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

65-0090—3 26

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

65-0090—327

7800 SERIES S7800A KEYBOARD DISPLAY MODULE

Home and Building Control

Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524

Honeywell Latin American Region

480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325

65-0090—3 G.R. Rev. 9-98

65-0090—3 28

Home and Building Control

Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7

Honeywell Europe S.A.

3 Avenue du Bourget
1140 Brussels
Belgium

Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.

Honeywell Asia Pacific Inc.

Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong

www.honeywell.com