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safety shutdowns. The Run/Test Switch is ignored
during PFEP for the C relay module if terminals
8 and 9 or 9 and 21 are jumpered.
IMPORTANT
When the relay module is switched to the TEST
mode, it stops and holds at the next Run/Test
Switch point in the operating sequence. Make sure
that the Run/Test Switch is in the RUN position
before leaving the installation.
RUN/TEST SWITCH
SEQUENCE
STATUS
LEDs
RESET
PUSHBUTTON
FLAME
SIMULATOR INPUT
Fig. 14. Sequence Status LEDs.
SETTINGS AND
ADJUSTMENTS
Selectable Site-Configurable Jumpers
The relay module has three site-configurable jumper
options, see Fig. 13 and Table 7. If necessary, clip the site-
configurable jumpers with side cutters and remove the
resistors from the relay module.
SERVICE NOTE: Clipping and removing a site-
configurable jumper enhances the level of safety.
TROUBLESHOOTING
The POWER LED provides fault identification when the Relay Module locks out on an alarm. Fault identification is a series
of fast- and slow-blinking LED lights. The fast blinks identify the tens portion of the fault code (three fast blinks is 30),
while the slow blinks identify the units portion of the fault code (two slow blinks is 2). Three fast blinks followed by two
slow blinks would be fault code 32. This identifies a running interlock on during STANDBY. (See Table 8 for Blinking Fault
Code List.)
The LED code repeats as long as the fault exists. To clear the fault, press the RESET button.
NOTE: Blink codes do not match fault codes viewed by an S7800 KDM.
CAPTIVE
MOUNTING
SCREW
PLUG-IN
PURGE
CARD
DUST
COVER
RELAY
MODULE
FLAME
AMPLIFIER
FLAME CURRENT
TEST JACKS
M7552A
15
RM7897A,C 7800 SERIES RELAY MODULES
IMPORTANT
Clipping and removing a jumper after 200 hours of
operation causes a nonresettable Fault 110. The
relay module must then be replaced.
SELECTABLE CONFIGURATION JUMPERS
RUN/TEST SWITCH
(EC7895C; RM7895C,D; RM7896C,D)
Fig. 15. Selectable site-configurable jumpers.
Table 7. Site-configurable jumper options.
Jumper
Number
Description
JR1
Pilot Flame Establishing
Period (PFEP)
JR2
Flame Failure Action
JR3
Airflow Switch (ILK) Failure Recycle Lockout
a
For RM7897C1026, if flame loss occurs during the first
15 seconds in the Run period, then lockout occurs. If
flame loss occurs after 15 seconds into the Run period,
then recycle.
M7553A
Intact
Clipped
10
4
seconds
seconds
Recycle Lockout
a
32-00158—03
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