Honeywell 7800 Series Manual page 28

RM7800E,G,L,M
OPERATION
TABLE 3—SEQUENCE STATUS DISPLAY INFORMATION (See Fig. 27) (Continued).
Burner Sequence
Additional sequence status information when an Expanded Annunciator is connected to the Relay Module,
also see 7800 SERIES System Annunciation Diagnostics and Troubleshooting, form 65-0118, Table 7.
BURNER OFF: T6
(Burner Switch)
STANDBY HOLD: T6
(Expanded Annunciator hold message)
STANDBY HOLD: T6
(Circuit Fault)
KEYBOARD FUNCTIONS
The keyboard contains four pushbuttons and each
has separate functions (SCROLL-Down, SCROLL-
Up, MODE and Change-Level). The MODE and
Change-Level pushbuttons, when pressed together,
provide a SAVE function.
1. SCROLL Down-Up pushbuttons (◊), see Fig. 28.
The SCROLL Down-Up pushbuttons (◊) are used to
scroll through the selectable messages. The double-headed
arrow (◊), which is located in the lower left position of the
second line of the display, represents the SCROLL Down-
Up pushbuttons. The SCROLL Down-Up pushbuttons (◊)
can be pressed to display selectable messages one at a time
or held down to scroll through the selectable messages at
a rate of two per second. When the last item of the
selectable message is viewed, the display wraps around
and displays the first selectable message again.
◊
Fig. 28—( ) SCROLL pushbutton function.
LEDs Energized
POWER, PILOT, FLAME, MAIN AND ALARM
POWER, PILOT, FLAME, MAIN AND ALARM
POWER, PILOT, FLAME, MAIN AND ALARM
2. Change-Level pushbutton (↔), see Fig. 29.
tween the first hierarchy of selectable messages to a subset
of selectable messages. The Change-Level pushbutton
can also be used to change from a subset message to a first
level selectable message. The symbol (>) located on the
second line in the lower right corner of the VFD represents
a first level hierarchy of selectable messages. The symbol
(<) located on the second line in the lower right corner of
the VFD represents a subset of selectable messages.
SAVE
3. MODE pushbutton, see Fig. 30.
display from a second-line-selectable message to second-
line-preempted message. The sixty second timeout func-
SAVE
tion also can be used for this task. The MODE pushbutton
will work only if there is a second-line-preempted mes-
M1932A
sage or lockout message.
28
The Change-Level pushbutton is used to change be-
↔
Fig. 29 ( )—Change-Level pushbutton function.
The MODE pushbutton instantaneously switches the
SAVE
SAVE
M1933A