Table 10-Accessing Historical And Diagnostic Selectable Messages - Honeywell 7800 Series Manual

TABLE 9—SEQUENCE AND STATUS HOLD MESSAGES (Continued)
NOTE: Normal sequences are in BOLD type, while abnormal sequences are not in bold type.
Sequence
BURNER OFF: T6
(Burner Switch)
STANDBY
STANDBY HOLD: T6
(EA Hold Message)
STANDBY HOLD: T6
(Circuit Fault)
TABLE 10—ACCESSING HISTORICAL AND DIAGNOSTIC SELECTABLE MESSAGES.
Step Operation
1 Press scroll key
to access Diagnostic
Information.
2 Press change level
key to Access Diag-
nostic Information.
3 Continue display
of Diagnostic
Information.
4 Continue through remaining diagnostic information display following step 3 as required.
5 Press change level
key to return to the
first level of Diag-
nostic Information
data prompt or to other
selectable messages.
NOTE: Historical Files may be selected similarly.
Message
The VFD indicates the Burner Switch is not closed. The burner sequence will not
advance to PURGE until the Burner Switch closes.
The VFD indicates the burner status, STANDBY, and the operating control is not
closed. The burner sequence will not advance to PURGE until the operating
control closes.
The VFD indicates the burner status, STANDBY, and a limit is not closed. The
burner sequence will not advance to PURGE until one or all limits close
downstream from the operating control.
The VFD indicates the burner status, STANDBY, and the control input is not
closed. The burner sequence will not advance to PURGE until the control input
closes.
Press Display
(◊) STANDBY
(◊)Diagnostic Info >
(↔) STANDBY
(◊)Diagnostic Info>
(◊) STANDBY
(◊)Device RM7838B<
(↔) STANDBY
(◊)Diagnostic Info>
45
TROUBLESHOOTING
Comments
Use the up/down scroll keys to access
the selectable message. The second
line will display Diagnostic Information.
Use the change level key to access the
Diagnostic Information.
DI Push the (◊) scroll key to scroll to the
next Diagnostic
message.
Another display can be selected or
discontinue accessing Diagnostic
Information review.
RM7838B
65-0120—1