CB780E/CB784E RELAY MODULES WITH VALVE PROVING
32-00150—03
30
750-234
Keyboard Functions
The keyboard contains four pushbuttons with separate
functions (SCROLL-Down, SCROLL-Up, MODE and
Change-Level). The MODE and Change-Level push-
buttons, when pressed together, provide a SAVE function.
When in the Setup Screen—Mode and Change Level
serves as Menu or Enter.
1.
Down-up arrow push-buttons. See Fig. 41.The down-
up arrow push-buttons are used to scroll through
the selectable messages. The double-headed arrow,
(
o)
, which is located in the lower left position of the
second line of the display, represents the down-up
push-buttons. The down-up push-buttons can be
pressed to display the selectable messages one at a
time or held down to scroll through the selectable
messages at the rate of two per second. When the
last item of the selectable message is viewed, the
display wraps around and displays the first select-
able message again.
2.
The tu push-button. See Fig. 42. The tu push-button
is used to change between the first hierarchy of
selectable messages to a subset of selectable mes-
sages. The tu push-button can also be used to
change from a subset message to a first level select-
able message. The symbol located on the second in
the lower right corner of the display represents a
subset of selectable messages.
3.
BACK push-button. See Fig. 43. Use the BACK push-
button to instantaneously switch the display from a
second-line selectable message to a second-line
preempted message. The sixty second time-out
function can also be used for this task. The BACK
push-button only works if there is a second-line pre-
empted message or a lockout message.
Fig. 41. The
o
(down-up) push-button function.
Fig. 42. The tu (change selectable level)
push-button function.
BURNER OFF:
(Burner Switch)
POWER
, PILOT, FLAME, MAIN AND ALARM
STANDBY HOLD:
(Expanded Annunciator hold
message)
POWER
, PILOT, FLAME, MAIN AND ALARM
STANDBY HOLD:
(Circuit Fault)
POWER
, PILOT, FLAME, MAIN AND ALARM
Table 10. Sequence Status Display Information (see Fig. 40). (Continued)
Burner Sequence
LEDs Energized (BOLD type)
RUN
Total Cycles 333
M23974A
EDIT:
BACK
- ENTER -
_
+
RUN
Total Hours 1332
EDIT:
BACK
- ENTER -
_
+
PILOT IGN 00:05
Fault History
M23975A
EDIT:
BACK
- ENTER -
_
+
PILOT IGN 00:10 H1
Fault Cycle 174
EDIT:
BACK
- ENTER -
_
+
