Dirty Fault Indication; Excessively Dirty Fault Indication; Self Test Abnormal Fault Indication - Simplex 4100 Operator's Manual

SIMPLEX 4100 FIRE INDICATOR PANEL
OPERATOR MANUAL

4.6.1 Dirty Fault Indication

A sensor specific "dirty" fault condition is reported any time the average value on an
individual sensor reaches a set threshold. At this point in time the 4100 FIP is still
compensating for environmental factors and holding the set sensitivity level. The
sensor should be scheduled for cleaning.
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The 4100 FIP includes a pre-programmed software point that can be turned on to
generate an "almost dirty" indication. This point is useful when maintenance is being
scheduled for dirty detectors as it provides a means to see if other sensors are
approaching a dirty indicator level.
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4.6.2 Excessively Dirty Fault Indication

An "excessively dirty" fault indication is reported anytime an individual sensor's
average value reaches a slightly higher threshold level. At this point the 4100 FIP
can no longer compensate for dirt and dust contamination and the sensitivity level
may begin to drift. Because false alarms are possible with this condition, sensors
must be cleaned as soon as possible. Although an "excessively dirty" fault condition
is reported, the sensor will continue in operation and will report an alarm condition if
one is detected.
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4.6.3 Self Test Abnormal Fault Indication

In addition to the automatic dirty Fault and excessively dirty indicators, the 4100 FIP
automatically tests all TrueAlarm™ sensors once every minute. This test raises the
value of each sensor to a value that simulates an alarm. If a value that is not in the
alarm range is reported back to the panel a "self test abnormal" fault will be
displayed for that specific sensor. Since the sensor is not working properly, it must
be replaced immediately.
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Document No: 4100-M001
ALMOST DIRTY
EXCESSIVELY DIRTY
SELF TEST ABNORMAL
28 March 2006
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