Honeywell 7800 Series Product Data page 10

7800 SERIES S7800B DISPLAY MODULE
Selectable
Message/Display
Diagnostic Information >
Device
Device Suffix
Run/Test Sw.
OperControl
Interlock
Pilot Valve
Main Valve
Ignition
LowFire Sw
HighFireSw
Preign ILK T20 or
T17
Valv/Start
Jumper 1
Jumper 2
Jumper 3
65-0219—1
Table 3. Selectable Messages (continued).
Description
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.
Preignition Interlock.
a
T21 Interrupted/Intermittent Pilot
Valve, First Stage Oil Valve or
Start Input.
Pilot Flame Establishing Period
(PFEP).
First Safety Time (for EC7850). INTACT/CLIPPED
Pilot Valve.
Main Trial Time (for EC7850).
Start-up Airflow Switch (AFS)
check.
Possible States/
Range (Terminals)
—
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
= 1 or 0
INTACT/CLIPPED
INTACT/CLIPPED
INTACT/CLIPPED
INTACT
Disabled/CLIPPED
Enabled
10
Comments
—
—
—
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 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 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.
Indicates if output is on or off,
energized or de-energized.
Display shows state of PFEP
jumper. If jumper is intact, 7800
SERIES was 10 second PFEP. If
jumper is clipped, 7800 SERIES
has 4 second PFEP.
Display shows state of First Safety
Time (EC7850) jumper. If jumper is
intact, EC7850 has 5 second First
Safety Time. If jumper is clipped,
the EC7850 has 3 second First
Safety Time.
Display shows state of Pilot Valve
(terminal no. 21). If jumper is
intact, RM7800G has Intermittent
Pilot Valve. If jumper is clipped,
RM7800G has 15 or 30 second
Interrupted Pilot Valve.
Display shows state of Main Trial
Time (EC7850)Valve (terminal no.
21). If jumper is intact, EC7850
has 5 second Main Trial Time. If
jumper is clipped, EC7850 has 3
second Main Trial Time.
Display shows state of Start-up
AFS check jumper. If jumper is
clipped, RM7800 AFS check is
enabled and if jumper is intact,
AFS check is disabled.
(continued)