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PRODUCT DATA

65-0288-1

7800 SERIES

S7800A1142 Keyboard Display Module

APPLICATION

The S7800A1142 Keyboard Display Module (KDM) provides

current system status along with first-out 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.

The S7800A1142 is required to program the Valve Proving

feature of select 7800 Series devices.

The S7800A1142 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).

• Allows for naming the S7830 Expanded Annunciator

terminals to match your system drawings. (Displayed

message only.)(Pass Code protected feature.)

• A three screen two-row 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). This “business

card” can be cloned to other displays to save setup time.

• Enable ModBus Communication feature.

The Business Card (Call Service) and Expanded Annunciator

can be made up using:

• Capital letters (A through Z).

• Lower case letters (a through z).

• Numbers (1 through 0).

• Symbols (!, @, #, $,%, etc.).

• Spanish symbols.

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) S7800A1142 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. A

clone function allows you to make multiple Business Cards

from the original display.

Contents

Appendix A:Display Setup—Clear All .............................. 27

Display Setup—CEA Assign ......................... 29

Display Setup—CS ON/OFF ........................ 31

Display Setup—CS EDIT .............................. 32

Appendix B:Valve Proving System ................................... 34

Setup of Valve Proving Function .................. 34

Appendix C: Setup of Post Purge ..................................... 36

Appendix D: Expanded Annunciator Tables ..................... 37

Appendix E: ModBus Function ......................................... 38

Contents

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

Features ........................................................................... 2

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

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

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

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

Troubleshooting ................................................................ 12

Hold and Fault Message Summary .................................. 16

Appendix A:Display Setup ............................................... 25

Display Setup—CLONE ............................... 25

Summary of content (48 pages)

PAGE 1
7800 SERIES S7800A1142 Keyboard Display Module PRODUCT DATA The S7800A1142 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). • Allows for naming the S7830 Expanded Annunciator terminals to match your system drawings. (Displayed message only.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE FEATURES SPECIFICATIONS • Application flexibility. Electrical Ratings: Voltage and Frequency: 13 Vdc peak full wave rectified (+20%/-15%). Power Dissipation: 7W maximum. VA consumption: 2 VA maximum. • Communication interface capability. — — Through Q7700 Network Interface Unit Through 203541 Connector on the ModBus data highway. • Dependable, long-term operation provided by microcomputer technology.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 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. 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.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 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. 4. 5. 6. Drill the pilot holes for the mounting screws. Cut holes in the door panel for the interlocking ears and the two plug-in connectors. Mount the KDM, securing it with the two screws provided in the KDM bag assembly.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 4. 5. For Recommended grounding practices, see Table 2. 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. Table 1. Recommended Wire Size and Part Number.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 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.
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800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE PC/PLC + A B GND C MOMENTARY PUSHBUTTON SWITCH RS-485 BUS 2 3 4 5 1 2 3 4 5 A B C (GND) +13 VDC 6 RESET 1 RM78xx SERIES DEVICE WITH S7800 SERIES 5 OR GREATER DISPLAY. MOMENTARY PUSHBUTTON SWITCH 1 2 3 4 5 1 2 3 4 5 A B C (GND) +13 VDC RESET 6 RM78xx SERIES DEVICE WITH S7800 SERIES 5 OR GREATER DISPLAY. 1 1 MULTI-DROP RS-485 COMMUNICATION BUS.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 1. 2. M24165 Fig. 9. S7800 Keyboard Display Module. 3. 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. When in the Setup Screen—Mode and Change Level serves as Menu or Enter. Down-up arrow push-buttons. See Fig. 10. The down-up arrow push-buttons are used to scroll through the selectable messages.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE BURNER CONTROL BURNER CONTROL LOCKOUT 17 *Main Flame Fail* LOCKOUT 17 DI Main Valve T9 = 0 EDIT: _ BACK - ENTER - + EDIT: _ BACK - ENTER - + M22873 Fig. 12. BACK push-button function. 4. SAVE function, see Fig. 13, 14, and 15. a. Enables users to identify the selectable 2nd line message they want to view upon power restoration. (See “Total Cycles” instead of “Flame Signal” for example.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 3. Selectable Messages . Selectable Message/Display Possible States/ Range (Terminals) Description Comments Flame Signal Flame signal strength. 0 - 5.0 Vdc Flame Amp (+ and Flame relay pull-in and drop- (Com)) out value 1.25 Vdc. Total Cycles Total number of equipment operating cycles. 0 - 99,999 (250,000; 999,999c) cyclesa Cycle will be updated each time main valve is energized. Total Hours Total number of equipment operating hours.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 3. Selectable Messages (Continued). Selectable Message/Display Possible States/ Range (Terminals) Description Comments Valv/Start T21 Interrupted/Intermittent Pilot Valve, First Stage Oil Valve or Start Input. = 1 or 0 Indicates if output is on or off, energized or de-energized. Jumper 1 Pilot Flame Establishing Period (PFEP). INTACT/CLIPPED Display shows state of PFEP jumper. If jumper is intact, 7800 SERIES was 10 second PFEP.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 4. Expanded Annunciator. Selectable Messagea (Second Line) Display Value (Second Line) First Line Message Expanded Annunciator↔ Expanded Annunciator (EA not connected)< Current Status (CS:)a a ÈEA EA Message< ÈEA Valve Closure (Valve Close) T5 = 1 or 0< ÈEA Burner Switch (Burner Sw.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 5. Keyboard Display Module Sequence and Status Hold Messages . Sequence INITIATE mm:ss Status The Keyboard Display Module (KDM) indicates the burner status, INITIATE, a stabilization period 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.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 5. Keyboard Display Module Sequence and Status Hold Messages (Continued). Sequence Status PURGE HOLD: T18 (Low Fire Switch) 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.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 6. Accessing Historical and Diagnostic Selectable Messages. Step Operation Press Display Comments 1. Press keys to access Diagnostic Information. STANDBY Diagnostic Info> Use the Down/Up SCROLL keys to access the selectable message. The second line will display Diagnostic Information. 2. Press key to Access Diagnostic Information. STANDBY Diagnostic Info> Use the Change Level key to access the Diagnostic Information. 3.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 4. State 4: In the fourth state, both lines are blanked for one-half second, then the display sequences to the first state. Hold and Fault Message Summary Fault Code 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* Table 7. Hold and Fault Message Summary.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 11 *Running ILK On* Fault 12 *Lockout ILK On* Fault 13 *Airflow Sw. On* System Failure Running Interlock powered at improper sequence point. Lockout Interlock powered at improper sequence point. Combustion airflow interlock fault during STANDBY. 1. 2. 3. 4. 5. Fault 14 *High Fire Sw.* High Fire Interlock Switch failure to close during PREPURGE. 1. 2. 3. 4. 5.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 19 *Main Flame Ign.* Fault 20 *Low Fire Sw. Off* System Failure Flame was lost during MFEP or the first 10 seconds of the RUN state. Low Fire Interlock switch failure to close during PREPURGE. 1. 2. 3. 1. 2. 3. 4. 5. Fault 21 *Running ILK* Fault 22 *Lockout ILK* Fault 23 *Airflow Switch* Running Interlock fault during PREPURGE. Lockout Interlock fault during PREPURGE.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 29 *Lockout ILK* System Failure Lockout Interlock fault. 1. 2. 3. 4. 5. Fault 30 *Running ILK* Running Interlock fault. 1. 2. 3. 4. Fault 31 *Low Fire Sw. Off* Low Fire Interlock Switch failure to close during RUN (Device specific). 1. 2. 3. 4. 5. Fault 32 *Airflow Switch* Combustion Airflow Interlock fault. 1. 2. 3. 4. 5.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 35 *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* System Failure 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.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 49 *Man-Open Sw. On* Fault 50 *Jumpers Wrong* Fault 51 *Flame Too Strong* System Failure The manual open switch was on when it should be off. The sequence logic detected a combination of jumpers that is illegal for the sequence, e.g., if it is correct to clip jumper JR1 or Jumper JR2, but not both, this fault would be used when both are clipped (Device specific).
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 56 *Block Intake* System Failure Block intake fault (Fulton pulse only). 1. 2. 3. 4. 5. 1. Fault 57 *Purge Fan Sw. Off* Purge Fan Switch is off when it should be on (Fulton pulse only). Fault 58 - 60 *Call Service* Fault 61 Unused faults. MV1 Off (Terminal 9); should be ON. 1. 2. 3. Fault 62 MV2 Off (Terminal 17); should be ON. 1. 2. 3.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 72 *Dynamic HFS* System Failure High Fire Switch closed; Low Fire Switch must be open (EC/RM7850 only). Fault 72 *Spec.Func.2* Special Function 2 Input (terminal 17) is off when it should be on (Device specific). Fault 73 *Spec.Func.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code Fault 110 *Call Service* System Failure The configuration jumpers differ from stored values. Fault 111 *Call Service* Relay Module configuration jumper test failure. Fault 112 - 126 *Call Service* Fault 127 *Call Service* Relay Module self-test failure. 1. 2. 3. 4. 1. 2. 3. 1. 2. 1. 2. Safety relay feedback circuit was in an improper state.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE APPENDIX A Display Setup The S7800A1142 Keyboard Display Module (KDM) requires a password to enter the Display Setup Menu. MASTER SLAVE 1 1 2 2 3 3 4 4 5 5 The Display Setup Menu offers the following functions: — — — — — — — — — — Clone—Allows the current display setup to be copied entirely to another display (Series 3 or greater)—page 25. MB Address---Enables the ModBus Feature and Location.
PAGE 26
7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Press ENTER by pressing the two ENTER buttons at the same time. The Select/Exit Screen (see Fig. 22) will appear. Choose Select. CHOICES ARE 0-99 ModBus Address: Clone Master: I am Transmitting. 01 BACK Fig. 24. Clone Master screen. Edit: - ENTER + The Slave display will change from Fig. 25 to many On/Off sweeps with periods of bright characters. M24013 Fig. 29. Up/Down arrows increase or decrease number.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Display Setup - MB Baud DISPLAY Setup ± PASSWORD: 000 DISPLAY Setup Select: MB BAUD Fig. 37. DISPLAY Setup screen. Fig. 32. MB Baud entered on Select screen. Display Setup MB Baud by pressing Enter. Scroll to MB BAUD screen. Select: M B B A U D. Enter your password if it has been changed from the Default Password. Press ENTER using the two ENTER buttons at the same time. The Select/Exit screen (see Fig. 33) will appear. Choose Select.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE To access the Change Password menu. Press the left three buttons of the KDM for one second, then release. The DISPLAY Setup screen (see Fig. 37) will appear. Press ENTER using the two ENTER buttons at the same time. Press the left three buttons of the KDM for one second, then release. DISPLAY Setup ± PASSWORD The Select/Exit Screen (see Fig. 33) will appear. Choose Select. Fig. 46. DISPLAY Setup/PASSWORD screen.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Repeat the above steps for the remainder of the custom descriptions you wish to create. CEA Edit Edit: Msg 45 When you have completed your final message, press ENTER. Fig. 48. CEA Edit/Edit Msg screen. Use the up/down and left/right arrows to select Msg (message) number you wish to edit. Press ENTER using the two ENTER buttons at the same time to select. Select Exit < Clear EOL Fig. 53. Save/Exit/Clear EOL screen. Use up arrow to select Exit.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Select Exit Assign: T07 to Msg 07 Aux Limit 1 Fig. 56. Select/Exit screen. Fig. 62. Assign screen. Choose Select. Use the left/right arrow to move the cursor left and right. Use the up/down arrows to change the message numbers (See Table 8 for pre-set messages or use your custom description from CEA EDIT. 32 is used from the above example. DISPLAY Setup Select: CLONE The display will look like this: Fig. 57. DISPLAY Setup/Select CLONE screen.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Display Setup—CS ON/OFF CS ON/OFF allows the Call Service Message to be as follows: • OFF—No call Service Message displayed, normal 7800 SERIES lockout message displayed. • ON—Customized Call Service Message displayed on 7800 SERIES lockout. Goes away when 7800 SERIES reset button is pushed—just like a normal lockout. • ON, Temporarily Off— Used for service technician to view normal 7800 SERIES Lockout messages along with diagnostic and history files.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Select Exit CALL SERVICE Fig. 84. CALL SERVICE screen. Fig. 78. Select/Exit screen. Choose Select. DISPLAY Setup Select: CLONE Fig. 85. Blank screen. Fig. 79. DISPLAY Setup/Select CLONE screen. The blank screen is displayed for two seconds. Use the down arrow to scroll through menu choices until CS TEST appears. When done, the display will be: DISPLAY Setup Select: CS TEST DISPLAY Setup Select: CS TEST Fig. 86. DISPLAY Setup/Select CS TEST screen.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Press ENTER by pressing the two ENTER buttons at the same time. . . . LOCKOUT . . . . . . . Select Exit Fig. 95. LOCKOUT screen. Using the left/right arrow will move the cursor left and right. Up and down arrows will move you through the series of available scripts (See Table 9). Up to 20 characters per line (you have two lines available) can be used in your message. Fig. 89. Select/Exit screen. Choose Select. NOTE: Moving through the scripts: 1.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE B. MV2 is commanded to be open while MV1 remains closed, to depressurize the space. After four seconds, MV2 is commanded closed again. DISPLAY Setup Select: CS EDIT C. This is followed by a three-second delay during which the valve proving pressure switch (VPS) is ignored. Fig. 100. DISPLAY Setup/Select CS EDIT screen. use the up arrow to scroll to CS TEST item to view your message. Return back to CS EDIT to make any corrections.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE NOTE: This screen sets up when to do the Valve Proving Test. 8. NOTE: Use Never on initial startup so that System Checkout can be performed. Then come back to set final operation configuration followed by the VPS system checkout. Fig. 104. Save Changes screen. Use the down arrow to save changes. After pressing the down arrow, “Getting Data” is displayed. SETUP: ValveProve ±VP Time: 00:30 Fig. 108. Confirmation Correct screen. 14.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE APPENDIX C 8. Setup of Post Purge NOTE: An S7800A1142, Keyboard Display Module (KDM), is required for the setup of the RM78XX Post Purge Timing. When the RM78XX is installed and powered, “STANDBY” will be shown on the first line of the display (Fig. 114). =Save changes =Exit no save Fig. 116. Save Changes screen. 9. Fig. 113. Setup Needed screen. Scroll down until “Setup” is displayed in the second line.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE APPENDIX D Tables Table 8. EA Assign Messages.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 9. Edit Available Text and Characters. (Continued) Edit Available Text and Characters R r 2 Õ õ S s 3 Ö ö T t 4 Ú ú U u 5 Ù ù V v 6 Û û W w 7 Ü ü X x 8 Ç ç Y y 9 Ñ ñ Z z Ÿ ÿ APPENDIX E: MODBUS FUNCTION Function Codes See Appendix A pages 26 and 27 for Setup. OPERATION The S7800 ModBusTM Data Feature enables terminal 1, 2 to Data + and Data -. Table 17 provides register mapping.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Device Address and Baud Rate Assign each device in the system a unique address by setting the MODBUS ADDRESS (see page 26). Only RTU communications with 1 Start Bit, 8 Data Bits, 1 Stop Bit and no parity is supported. NOTE: Assign a device address number from 01 to 99. 00 is not an acceptable address number and will not work, except for the broadcast ability of function 6.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 17. ModBus™ Register Assignments.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Burner Control Type Codes CODE The burner control type code indicates the exact model number of the burner control. See Table 19. 140 199 200 201 202 203 204 205 206 207 208 209 210 299 Table 19. Burner Control Type Codes.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 21. 7800 SERIES Sequence State Codes and Associated register code values. (Continued) Table 21. 7800 SERIES Sequence State Codes and Associated register code values.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 7800 SERIES String Codes Table 21. 7800 SERIES Sequence State Codes and Associated register code values. (Continued) Register 40003 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 7800 SERIES Sequence State STATE 54 STANDBY HOLD: PURGE FAN SWITCH STATE 56 PURGE HOLD: PURGE FAN SWITCH STANDBY HOLD FLAME DETECTED STANDBY HOLD COMB.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 22. 7800 SERIES String codes. (Continued) String Code Table 22. 7800 SERIES String codes.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 22. 7800 SERIES String codes. (Continued) String Code Table 22. 7800 SERIES String codes. (Continued) String String Code 136 Input B T17 = 0 183 137 Input B T17 = 1 138 PreIgn ILK T17 = 0 String Jumper 3 Clipped) 139 PreIgn ILK T17 = 1 NOTE: The values that follow are generated when the fault code is zero and the Expanded Annunciator code indicates that one or more switches are open.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 7800 SERIES Fault Codes Table 23. 7800 SERIES Fault Codes. (Continued) Table 23 is a complete list of fault codes that may appear in the fault code register. The Fault String Code register will contain the corresponding String code identified in the table. Table 23. 7800 SERIES Fault Codes.
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7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 23. 7800 SERIES Fault Codes. (Continued) Fault Code (Reg 40001) Table 23. 7800 SERIES Fault Codes.
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Table 23. 7800 SERIES Fault Codes. (Continued) Table 23. 7800 SERIES Fault Codes.