Honeywell 7800 Series Manual page 47

TABLE 11—SELECTABLE MESSAGES (SEE TABLE 4) (Continued)
Selectable Message/
Display
Ignition
PV Hold
ManOpenSw
LowFire Sw
HighFireSw
PreIgn ILK
V2/Start
Jumper 1
Jumper 2
Jumper 3
Amp Type
Description
T10 Ignition.
T16 Pilot Valve Hold
T17 Manual Open Valve
Switch
T18 Low Fire Switch.
T19 High Purge Rate Switch.
T20 Preignition Interlock.
T21 Start Switch Input.
Pilot Flame
Establishing Period
(PFEP).
Pilot Valve.
Immediate or deferred
MFEP.
Defines type
of amplifier installed.
47
Possible States/Range
(Terminals) Comments
ON or OFF Indicates if output term-
inal is on (energized) or
off (de-energized.)
ON or OFF Indicates if RM7838B
is commanded to hold
in Pilot.
ON or OFF Indicates if Valve is at
open position.
ON or OFF Indicates if input is on
(energized) or off
(de-energized.)
ON or OFF Indicates if input is
(energized) or off
(de-energized.)
ON or OFF Indicates if input is on
(energized) or off
(de-energized.)
ON or OFF Indicates if Start Input is
present. This is momen-
tary input so RM7838B
could be in RUN and this
will read OFF.
INTACT/ Display shows state of
CLIPPED PFEP jumper. If jumper is
intact, the RM7838B will
have a 10 second PFEP;
if jumper is clipped,
RM7838B will have
4 second PFEP.
INTACT/ Display shows state of
CLIPPED Pilot Valve . If jumper is
intact, RM7838B will
have Intermittent Pilot
Valve. If jumper is clipped,
RM7838B will have a
10 second Interrupted
Pilot Valve.
INTACT Deferred/ Display shows state of
CLIPPED Immed. Main Fuel Valve jumper.
If jumper is clipped,
RM7838B sequences
automatically to MFEP.
If jumper is intact,
MFEP is delayed until
Manual Open Valve
input is received.
NORMAL/AMP- Display shows type of
CHECK/SHUTTER flame detection system
installed (i.e., NORMAL/
Standard, AMP-CHECK/
AMPLI-CHECK™, and
SHUTTER/Dynamic
Self-Checking).
RM7838B
TROUBLESHOOTING
(continued)
65-0120—1