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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.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Wiring ...............................................................................
Troubleshooting ................................................................ 12
Hold and Fault Message Summary .................................. 16
Appendix A: Display Setup ............................................... 25
Display Setup—CLONE ............................... 25
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
1
Appendix A: Display Setup—Clear All .............................. 27
2
Display Setup—CEA Assign ......................... 29
2
Display Setup—CS ON/OFF ........................ 31
2
Display Setup—CS EDIT .............................. 32
3
Appendix B: Valve Proving System ................................... 34
4
Setup of Valve Proving Function .................. 34
Appendix C: Setup of Post Purge ..................................... 36
Appendix D: Expanded Annunciator Tables ..................... 37
Appendix E: ModBus Function ......................................... 38
PRODUCT DATA
Contents
65-0288-1

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   Summary of Contents for Honeywell 7800 SERIES

  • Page 1 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).
  • Page 2 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.
  • Page 3 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 1. Down-up arrow push-buttons. See Fig. 10. The down-up arrow 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 down-up push-buttons.
  • Page 4 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 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.) The second line selectable message is...
  • Page 5 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 3. Selectable Messages . Selectable Possible States/ Range Message/Display Description (Terminals) Comments Flame signal strength. 0 - 5.0 Vdc Flame Amp (+ and Flame relay pull-in and drop- Flame Signal - (Com)) out value 1.25 Vdc.
  • Page 6 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 3. Selectable Messages (Continued). Selectable Possible States/ Range Message/Display Description (Terminals) Comments T21 Interrupted/Intermittent = 1 or 0 Indicates if output is on or off, Valv/Start Pilot Valve, First Stage Oil energized or de-energized.
  • Page 7 Internal faults and external faults such as interlock failures, After the KDM is installed, return the 7800 SERIES to normal flame failures and false flame signals are annunciated by the operation, restore power and run the system through at least KDM via the 7800 SERIES Relay Module.
  • Page 8 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 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 for the relay module to check for any fluctuations in ac line voltage inputs or control inputs on power up or during normal operation.
  • Page 9: Features

    7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 5. Keyboard Display Module Sequence and Status Hold Messages (Continued). Sequence Status PURGE HOLD: T18 The KDM indicates the burner status and that the Low Fire Switch is not closed. The firing rate motor is (Low Fire Switch) driving to its Low Fire position in preparation for Ignition Trials.
  • Page 10 Relay Module but will not reset a lockout condition. Lockout Messages When the 7800 SERIES is locked out, it displays a repeating cycle of messages unless the Call Service Feature is Active. Then the Fault message is displayed followed by the Customer M22878 Service message.
  • Page 11: Specifications

    7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE 4. State 4: In the fourth state, both lines are blanked for NOTE: For further explanation of Lockout Messages, one-half second, then the display sequences to the first Troubleshooting and Checkout, refer to form 65-0229.
  • Page 12 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 11 Running Interlock powered at 1. Check wiring to make sure that interlocks are connected *Running ILK On* improper sequence point.
  • Page 13 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 19 Flame was lost during MFEP or 1. Inspect the main fuel valve(s) and connection(s). *Main Flame Ign.* the first 10 seconds of the RUN 2.
  • Page 14 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 29 Lockout Interlock fault. 1. Check wiring and correct any errors. *Lockout ILK* 2. Inspect the fan; make sure that there is no blockage of the air intake and that it is supplying air.
  • Page 15 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 35 Safety relay was off when it 1. Reset and sequence the relay module. If fault repeats, replace *Call Service*...
  • Page 16: Installation

    7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 49 The manual open switch was WARNING *Man-Open Sw. On* on when it should be off. Explosion Hazard. Can cause severe injury, death or property damage.
  • Page 17: Wiring

    7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 56 Block intake fault (Fulton pulse 1. Check wiring and correct any errors. *Block Intake* only). 2. Inspect the Block Intake Switch and make sure it is working properly.
  • Page 18: Troubleshooting

    7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 7. Hold and Fault Message Summary. (Continued) Fault Code System Failure Recommended Troubleshooting Fault 72 High Fire Switch closed; Low 1. Check firing rate position switches (usually in Modutrol® *Dynamic HFS* Fire Switch must be open Motor) for proper operation.
  • Page 19 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 Fault fault code register. The Fault String Code register will contain...
  • Page 20 7800 SERIES S7800A1142 KEYBOARD DISPLAY MODULE Table 23. 7800 SERIES Fault Codes. (Continued) Table 23. 7800 SERIES Fault Codes. (Continued) Fault Fault Fault Fault Code Fault Message String Code Fault Message String (Reg (NOTE: FAULT n: is not in Code...

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