Honeywell 7800 Series Product Data page 9

Selectable
Message/Display
Flame Signal
Total Cycles
Total Hours
Fault History >
(Six most recent faults)
Fault Cycle
Fault Hours
Fault Code
*Fault Message*
Sequence Message
(Second Line Message)
Diagnostic Information >
Device
Device Suffix
Run/Test Sw.
OperControl
Interlock
Pilot Valve
Main Valve
Ignition
LowFire Sw
HighFireSw
PreIgn ILK
Table 3. Selectable Messages .
Description
Flame signal strength.
Total number of equipment
operating cycles.
Total number of equipment
operating hours.
First level prompt for history
information. Has subset level.
! Cycle when fault occurred.
H1
! Run hour when fault occurred. 0 - 99,999
H1
! Number that identifies the
H1 reason for lockout.
! Indicates cause of lockout.
H1
Indicates where in the
!
H1 sequence the lockout
occurred.
! Second line message explains
H1 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.
First level prompt for
diagnostic information. Has
subset level.
Device type number.
Device suffix number.
Position of Run/Test Switch.
T6 Operating Control Input.
T7 Running/Lockout Interlock.
T8 Pilot Valve.
T9 Main Fuel Valve.
T10 Ignition.
T18 Low Fire Switch.
T19 High Fire Switch.
T20 or T17 Preignition
b
Interlock
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
Possible States/ Range
(Terminals)
0 - 5.0 Vdc Flame Amp (+ and
- (Com))
0 - 99,999
a
(250,000) cycles
0 - 99,999
a
(250,000) hours
—
0 - 99,999 cycles (250,000)
cycles
a
(250,000) hours
0 - 999
—
—
—
—
RM78XXX or EC78XXX
nnnn
RUN or TEST
= 1 or 0
= 1 or 0
= 1 or 0
= 1 or 0
= 1 or 0
= 1 or 0
= 1 or 0
= 1 or 0
9
Comments
Flame relay pull-in and drop-
out value 1.25 Vdc.
Cycle will be updated each
time main valve is energized.
Hour will be updated each time
main valve output is energized
for 60 minutes.
—
—
—
—
—
—
—
—
—
—
Indicates if 7800 SERIES is in
RUN or TEST mode.
Indicates if input is on or off,
energized or de-energized.
Indicates if input is on (1) or off
(0), energized or de-energized.
Indicates if output terminal is
on or off, energized or
de-energized.
Indicates if output terminal is
on or off, energized or
de-energized.
Indicates if output terminal is
on or off, energized or de-
energized.
Indicates if input is on or off,
energized or de-energized.
Indicates if input is on or off,
energized or de-energized.
Indicates if input is on or off,
energized or de-energized.
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