Honeywell 7800 Series Product Data page 49

7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
• Postpurge time (if applicable)
• Valve proving (VP) when option setting (if applicable)
• Valve proving (VP) time (if applicable)
• Manufacturing code
• Software revision
• Reset count (number of times the module has reset due to an internal fatal error)
• Reset reason code of most recent internal fatal error
Terminals are displayed with their model use, e.g., T6 may be used as a "Demand" or
"Operating control" terminal.
Fig. 78. Burner control diagnostics
The up and down arrow buttons are used to scroll the status lines. The left arrow button is
used to exit the page and return back to the Home page.
Annunciator Diagnostics
Diagnostic information about the annunciator can be viewed on the display module when
an annunciator is connected in the system (see Fig. 79). If an annunciator is not connected,
this information is not accessible. The following information is displayed:
• Annunciator status
• T4-T22 terminal status – "ON" or "OFF"
• Fault ("first out") code
• Software revision
The assigned terminal names display for the T4-T22 terminals.
Fig. 79. Annunciator diagnostics
The up and down arrow buttons are used to scroll the status lines. The left arrow button is
used to exit the page and return back to the Home page.
Display Diagnostics
Diagnostic information about the display module can be viewed on a diagnostics page (see
Fig. 80). The following information is displayed:
• Manufacturing code (when the display was built)
• Display software version
• Internal temperature (inside the display)
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