7800 SERIES S7800A KEYBOARD DISPLAY MODULE
9 65-0090—4
Table 3. Selectable Messages .
Selectable
Message/Display
Description
Possible States/ Range
(Terminals)
Comments
↕Flame Signal Flame signal strength. 0 - 5.0 Vdc Flame Amp (+ and
- (Com))
Flame relay pull-in and drop-
out value 1.25 Vdc.
↕Total Cycles Total number of equipment
operating cycles.
0 - 99,999
(250,000) cycles
a
Cycle will be updated each
time main valve is energized.
↕Total Hours Total number of equipment
operating hours.
0 - 99,999
(250,000) hours
a
Hour will be updated each time
main valve output is energized
for 60 minutes.
↕Fault History >
(Six most recent faults)
First level prompt for history
information. Has subset level.
— —
Fault Cycle !
H1
Cycle when fault occurred. 0 - 99,999 cycles (250,000)
cycles
—
Fault Hours !
H1
Run hour when fault occurred. 0 - 99,999
(250,000) hours
a
—
Fault Code !
H1
Number that identifies the
reason for lockout.
0 - 999 —
*Fault Message* !
H1
Indicates cause of lockout. — —
Sequence Message !
H1
Indicates where in the
sequence the lockout
occurred.
— —
(Second Line Message) !
H1
Second line message explains
any further information that is
available from the 7800
SERIES or may be blank if
there is not a preemptive
second-line. H2…H6 etc.
— —
Diagnostic Information > First level prompt for
diagnostic information. Has
subset level.
— —
Device Device type number. RM78XXX or EC78XXX —
Device Suffix Device suffix number. nnnn —
Run/Test Sw. Position of Run/Test Switch. RUN or TEST Indicates if 7800 SERIES is in
RUN or TEST mode.
OperControl T6 Operating Control Input. = 1 or 0 Indicates if input is on or off,
energized or de-energized.
Interlock T7 Running/Lockout Interlock. = 1 or 0 Indicates if input is on (1) or off
(0), energized or de-energized.
Pilot Valve T8 Pilot Valve. = 1 or 0 Indicates if output terminal is
on or off, energized or
de-energized.
Main Valve T9 Main Fuel Valve. = 1 or 0 Indicates if output terminal is
on or off, energized or
de-energized.
Ignition T10 Ignition. = 1 or 0 Indicates if output terminal is
on or off, energized or de-
energized.
LowFire Sw T18 Low Fire Switch. = 1 or 0 Indicates if input is on or off,
energized or de-energized.
HighFireSw T19 High Fire Switch. = 1 or 0 Indicates if input is on or off,
energized or de-energized.
PreIgn ILK
T20 or T17
b
Preignition
Interlock
= 1 or 0 Indicates if input is on or off,
energized or de-energized.
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