Specifications

Model SK-2224 Fire Control Panel Installation/Operation Manual
6-2 151051
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 acknowledged
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 acknowledged
the condition.
ZONE 1
and
ZONE 2
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 acknowledged
the condition.
SUPERVISORY
(yellow)
ON = Zone has a supervisory condition (self-
restoring condition)
OFF = No supervisory condition exists.
FLASHING = supervisory trouble detected on that
zone.
If flashing, press the ACK button to acknowledged
the condition.
TROUBLE
(yellow)
ON = Zone has a trouble condition which has been
acknowledged
OFF = No zone trouble
FLASHING = Zone has a trouble condition
DOUBLE FLASHING = Zone was disabled
If flashing, press the ACK button to acknowledged
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 acknowledged
the condition.
SYSTEM SILENCED
(yellow)
ON = System audio output has been silenced
OFF = Nothing silenced
FLASHING = Partially silenced
When condition that caused audio activation
clears, this condition will clear automatically.
Note:
Silencing an alarm will cause a gen-
eral trouble condition.
Table 6-1: Meaning of LEDs
LED (Color) Function Comments