Honeywell 7800 Series Product Data page 17

Fig. 25. Troubleshooting guide
When the Call for Service feature is enabled a custom message up to 8 lines is displayed
instead of the standard lockout message (see Fig. 26 for an example). Only 4 lines of the
custom message are displayed at a time; the first 4 lines are displayed for 2 seconds,
followed by the remaining lines for 2 seconds. The page alternates between these two sets
of lines continuously. If the custom message is 4 lines or less, no alternation is needed.
Fig. 26. Call for Service lockout message
The first or top line of the message is not custom and is the same as the top line in the
standard lockout message. This line permits the user to navigate to the Lockout Detail
page.
The lockout message (standard or custom) displays continuously while the lockout
condition persists. The user may elect to exit the message to view other pages by pressing
the "Left arrow" or "Home" button which navigates to the Home page. The lockout
condition is displayed on the Home page (see Fig. 27) which permits the user to re-display
the lockout message. Pressing the "Right arrow" button when the lockout fault code line
has input focus causes the lockout message to be re-displayed.
LOCKOUT
C0NDITION
Fig. 27. Lockout indication on Home page
The following table describes the possible faults a burner control may have and the
recommended action.
Fault Code System Failure
Fault 1 *No No card is plugged into
Purge Card* the purge card slot.
7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
Make sure the purge card is seated properly.
Inspect the purge card and connector on the relay module for
damage or contaminants.
Reset and sequence the relay module.
If the fault code reappears, replace the purge card.
Reset and sequence the relay module.
f the fault persists, replace the relay module.
17
GO TO
LOCKOUT
DETAIL
GO TO
LOCKOUT
MESSAGE
32-00110-07