Model SK-4224 Fire Alarm Control Panel Installation/Operation Manual
7-2
151068
GND FAULT (yellow)
ON = Ground fault condition exists and was acknowledged
OFF = No fault
FLASHING = A ground fault condition detected
If flashing, press the ACK button to
acknowledge the condition.
LOW BATTERY (yellow)
ON = Battery low condition that has been acknowledged
OFF = Good battery condition
FLASHING = Battery low condition
If flashing, press the ACK button to
acknowledge the condition.
ZONE 1
Through
ZONE 4
ALARM (red)
ON = Zone in alarm which has been acknowledged
OFF = No Alarm
FLASHING = Zone in alarm has not yet been acknowledged
If flashing, press the ACK button to
acknowledge the condition.
SUPERVISORY
(yellow)
ON = Zone has a supervisory condition which has been
acknowledged (self-restoring condition)
OFF = No supervisory condition exists
FLASHING = Supervisory trouble detected on that zone that has
not yet been acknowledged
If flashing, press the ACK button to
acknowledge the condition.
TROUBLE
(yellow)
ON = Zone has a trouble condition which has been acknowledged
OFF = No zone trouble
FLASHING = Zone has a trouble condition not yet acknowledged
DOUBLE FLASHING = Zone was disabled
If flashing, press the ACK button to
acknowledge the condition.
CLEAN ME FLASHING = Indicates that the smoke detector needs
cleaning
A “Clean Me Flash” is a flash with a long
LED “on” Time and a short LED “off”
time indicating that the smoke detector
needs cleaning. Applies only to smoke
detectors with the CLEAN ME feature.
The “Clean Me” flash starts after the
trouble condition has been acknowledge.
NAC 1
and
NAC 2
ACTIVE (yellow)
ON = NAC is active during an alarm
OFF = NAC is not active during alarm
TROUBLE
(yellow)
ON = NAC has a trouble condition and was acknowledged
OFF = No trouble condition
FLASHING = NAC is in trouble
DOUBLE FLASHING = Circuit was disabled
If flashing, press the ACK button to
acknowledge the condition.
SYSTEM SILENCED
(yellow)
ON = System audible output has been silenced
OFF = Nothing silenced
FLASHING = Partially silenced
Audible trouble activations will clear
automatically when the condition resets.
Audible alarm signals have to be
manually reset.
Note:
Silencing an alarm will cause a
general trouble condition.
Table 7-1: Meaning of LEDs
LED (Color)
Function
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