Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
32-00110—05 16
SERVICE NOTE: If the Keyboard Display Module screen is scrambled, remove and reinstall the Keyboard Display Module
and reset the 7800 SERIES Relay Module.
SERVICE NOTE: Reset the 7800 SERIES Relay Module by pressing the reset push button on the relay module or pressing a
remote reset push button wired through the Keyboard Display Module, Data ControlBus™ Module or Remote Reset
Module. A power-up reset will cause an electrical reset of the 7800 SERIES Relay Module but will not reset a lockout
condition.
Lockout Messages
When the 7800 SERIES is locked out, a standard lockout message is displayed unless the Call for Service feature is
enabled. When the Call for Service feature is enabled a custom lockout message is displayed instead. The standard
lockout message (see Fig. 22) is automatically displayed when the lockout initially occurs unless the user happens to be
editing a parameter on a page. In this case the lockout message waits until the user is done editing and exits the page.
Fig. 22. Lockout message
Up to 4 lines are displayed in the standard lockout message. The top line shows the numeric fault code that determined
the lockout. A description of this fault is shown on the second line and possibly on the third line if the description requires
two lines to display it (only one line needed in the above example). On the next line(s) the burner control sequence state at
the time of the lockout is displayed. The sequence state may need 1 or 2 lines to display (Fig. 22 required two lines). Since
a maximum of 4 lines are displayed in this message, in the case when both the fault description and sequence state each
need 2 lines to display their text, the second line of the sequence state is dropped to make room.
Fig. 23. Annunciated lockout message
Table 4. Accessing Historical and Diagnostic Selectable Messages.
Step Operation Press Display Comments
1. Press  buttons to access Diagnostic
Information.
 STANDBY
Diagnostic
Information>
Use the Down/Up arrow buttons to access the
"Diagnostic information" line.
2. Press  button to access Diagnostic
Information.

STANDBY
Diagnostic
Information>
Use the right arrow or OK button to access the
Diagnostic Information.
3. Continue display of Diagnostic
Information.
 Device RM7800< Push the Down/Up arrow buttons to scroll
through the burner control diagnostic status.
4. Continue through remaining
diagnostic information display
following step 3 as required.
— — —
5. Press the  arrow button to return to
the Home page

STANDBY
Diagnostic
Information>
Another display can be selected or
discontinue accessing Diagnostic
Information review.
FAULT CODE
GO TO
LOCKOUT
DETAIL
DESCRIPTION
STATE AT TIME
OF FAULT
ANNUNCIATED
FAULT CODE
ANNUNCIATED
DESCRIPTION