Ronan X11SN - Manual (Page 6)

connected common for first alert sequence
groups. Now remove the alarm modules one
at a time and determine whether or not the
normally closed/normally open switch is in the
proper position and reinsert the card firmly,
seating it in the connector. Power may now be
applied to the system.
Upon power application, the flasher module
within the system will automatically initiate a
reset cycle. The system should then be in a
quiescent state with the horn(s) off and no
lamps flashing. Some lamps may, however, be
on if their associated field contacts are in an
abnormal condition.
Depression of TEST should cause all extin-
guished lamps to come on flashing and the
audible alarm to sound. From this point, refer
to the particular Sequence Charts to obtain
normal system operation. When testing an in-
stalled system, be alert to the possibility that
an actual alarm may initiate during the test
procedure and appear to give conflicting
results.
7.0 TROUBLESHOOTING
7.1 General
Simple attention to the obvious can often
solve what appears to be a problem in the
system.
A. Burned out, broken, or improperly seated
bulbs will not light.
B. Alarm modules not properly seated in their
connector will prevent alarm point(s) from
functioning.
C. Alarm point pull-up resistors could be
burned providing no voltage at terminal 1.
7.2 Nonoperating Alarm System
A. Verify that the power source is operating
and that the V+ to V- voltage on the rear
terminals is in the range of 18 V to 28 V.
(Below 18 V, operation may prove erratic.)
Be sure to verify polarity.
B. If the power supply fuse blows each time
power is applied:
1. Check the Power Supply Parts List for
proper fuse size.
2. Remove Alarm System from the supply
and try again. If fuse holds, double
5
check polarity and reconnect. If fuse still
blows, remove all alarm modules and
flasher and try again. If the fuse blows at
this point, the problem has been isolated
to a short in the internal wiring.
C. If power remains on, but any or all push but-
tons (SILENCE, TEST, RESET, ACKNOWL-
EDGE) do not appear to function:
1. Verify proper wiring by measuring the
voltage at terminal T, A, S and/or R as
applicable. Voltage measurements are
taken with respect to the V- terminal and
should in all cases be zero volts with the
button released and V+ (20-28 Vdc) with
the button depressed.
2. If the problem persists, the Flasher
Module is suspect. Replace the Flasher
Module and try again.
3. Be alert to the possibility that a single
board can, under unique conditions,
cause what appears to be a system mal-
function. The following is a typical exam-
ple:
a) If a large group of F3A points comes
on fast flashing rather than intermit-
tent flashing during TEST, one board
can be sending a signal to all of the
others. A failure of the flasher or the
test circuit is not necessarily indicat-
ed.
b) In the above case, remove Alarm
Modules sequentially and repeat test-
ing until the trouble clears.
c) As a general rule, common sense in
isolating the trouble will prevail. If one
or more alarm boards appear to be
malfunctioning, remove them from the
system entirely before continuing. Fill
their positions with boards from the
upper left or lower right of the system
so as to concentrate known good
modules, and then proceed with diag-
nostic and analysis of the remainder.
Working with several scattered
diverse problems simultaneously is
nearly always self-defeating.
d) Refer to the section on Step-by-step
Procedures for further information.