Beacon MEGA - Page 47

47
Part No. 6-847681-00 Rev. D
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Symptom Possible Cause Corrective Action
5. Audible alarm does not
sound when visual indicator
is illuminated.
a. Faulty display chassis or
interconnect board.
b. Faulty alarm in power supply
chassis.
a. Use test mode of another module to
verify audible alarm is functioning.
If alarm sounds, replace alarm
module chassis. If alarm does not
sound after installation of new
display chassis, replace interconnect
board.
b. Replace power supply chassis.
6. User assigned alarm
indicator activated when
system is normal.
a. Faulty dry contact switch at
supply source.
b. Faulty field wiring.
c. Faulty display chassis.
a. Replace or repair switch.
b. Check wiring for continuity and
check connections.
c. Locate + and COM terminals for the
signal input on interconnect board.
Use a jumper wire to close the
signal circuit. If indicator goes out
the problem is in field wiring or dry-
contact switch. If indicator does not
go out, problem is confined to
interconnect board or display
module chassis. Replace display
chassis first, then interconnect
board if necessary.
7. Unused user assigned alarm
indicator is illuminated and
audible alarm is sounding.
a. No jumper wire between
unused terminals on
interconnect board (Digital
Display Modules).
b. Alarm signal not disabled
(Multi-Signal Alarm
Modules).
a. Locate + and COM terminals for the
signal input on interconnect board.
Install jumper between terminals for
unused signals.
b. Run set-up program and disable
alarm for that signal.
8. High or low pressure alarm
activated when digital
display indicates pressure or
vacuum is within the normal
range.
a. Alarm set-points have been
changed.
b. Faulty display chassis.
a. Use self-test mode to check current
set-points. Use set-up mode to
readjust set-points if required.
b. If alarm is activated when display
pressure or vacuum is within set
limits, replace display chassis.