Honeywell 7800 Series Product Data page 13

7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
The S7800 provides diagnostic information to aid the service mechanic in obtaining
information when troubleshooting the system. See Table 4 for information on accessing
historical and diagnostic selectable messages. Information available in the Diagnostic
Information includes Device Type, Software Revision, Manufacturing Code, Flame Amplifier
Type, Flame Failure Response Time (FFRT), Selectable Jumper Configuration Status, Run/
Test Switch Status and Terminal Status.
Information from the above table and Table 5 are viewable in the display module. The
troubleshooting guide can be accessed from the Display Menu (see Fig. 13). A menu is
displayed that permits access to these different sections of the guide:
• Introduction
• Faults
• Sequence and Status Hold messages
Fig. 13. Troubleshooting guide menu
The Introduction section contains brief troubleshooting tips and is presented in a scrollable
paragraph form for reading using the up and down arrow buttons (see Fig. 14). The
navigation bar contains the following commands that can be selected using the right and
left arrow buttons:
• "Faults" – go to Troubleshooting guide Faults section
• "Exit" – exit Introduction section and return back to Troubleshooting guide menu
• "Sequence" – go to Troubleshooting guide Sequence/Status Hold section
Pressing the OK button executes the command with the current input focus.
Fig. 14. Troubleshooting guide introduction
The Faults section presents a description and recommended actions for each fault that
the burner control module may have (see Fig. 15). The information is presented for a single
fault code and when more lines are needed to display the information than can fit on the
page, the up and down arrow buttons are used to scroll through the lines.
Fig. 15. Troubleshooting guide faults section
The Faults section can be accessed starting at the beginning (see Fig. 15) or by going
directly to a specific fault code (see Fig. 16).
Fig. 16. Troubleshooting guide direct fault access
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