II - 3
SWITCH FUNCTIONS
System Reset: Resets the Fire Alarm Control
Unit and Smoke Detectors
following an alarm condition.
Signal Silence: Operation of the switch during
an alarm condition will silence
the appropriate building alarm
signals.
Trouble Silence: Operation of the switch during
a trouble condition will silence
the control unit trouble buzzer.
After the trouble condition is
cleared the buzzer sounds again
indicating the switch must be
returned to the normal condition.
L.E.D. FUNCTIONS
System Power: (Green) Indicates the primary
(A.C.) power is connected to the
control unit.
Signal Silenced: (Yellow) Indicates the building
alarm signals have been silenced.
System Trouble: (Yellow) Indicates, in a pulsating
manner, that a trouble condition
exists in the fire alarm system.
Zone Alarm: (Red) Indicates an alarm condition
in the associated zone.
Zone Trouble: (Yellow) Indicates an open condi
tion in the associated zone.
NOTE: Zones #3 and #4 are not used on the
15220A Fire Alarm System Control Unit.
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