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SK-4224 Basic Operating Instructions P/N 151066
These instructions must be framed and displayed next to the SK-4224 panel in accordance
with NFPA 72 fire code for Local Fire Alarm System.
LED (Color)
Function
Comments
AC (green)
ON = Good AC
OFF = Low AC trouble condition and it was acknowledged
FLASHING = Unacknowledged AC Low trouble condition
If flashing press the ACK button to acknowledge the condition.
GENERAL TROUBLE (yellow)
ON = System trouble
OFF = System OK
FLASHING = At least one serial device is in trouble
DOUBLE FLASHING = Two types of serial devices are in trouble.
WALK TEST (yellow)
ON = Walk test is in progress
OFF = Walk test is off.
FLASHING = Walk test is on and at least one zone is not ready
Allow approximately 47 seconds between detector tests.
In walk test when a detector is tripped it will cause an alarm for two
seconds, then the control panel will drop power to the circuit for seven
seconds to reset the detector. Then an additional 38 seconds is needed
to restore the detector.
If verification is used the time between detector test will be about 2
minutes and 30 seconds.
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
When condition that caused audio activation clears, this condition will
clear automatically.
Note:
Silencing an alarm will cause a general trouble condition.
Operation
Keystrokes
Disable notification appliance circuit.
To re-enable the circuit, press [NAC DISABLE] again.
Press the appropriate [NAC DISABLE] key. The NAC circuit will be disabled and the corresponding
TROUBLE LED will Double Flash. This function is not available during an alarm condition.
Disable a zone
To re-enable the circuit, press [ZONE DISABLE] again.
Press the appropriate [ZONE DISABLE] key. The zone will be disabled and the corresponding TROUBLE
LED will Double Flash. This function is not available during an alarm or supervisory condition.
Begin Walk Test
Press [WALK TEST]. Walk Test LED turns on.
Note:
Walk test will not activate if the control panel has a trouble, alarm, or supervisory condition.
End Walk Test
(The test ends automatically after 10 minutes of no system
activity.)
Press [WALK TEST].
NOTE: The Walk Test feature is not operational during an alarm, supervisory or any system trouble
condition.
Acknowledge condition (alarm, supervisory, trouble)
Press [ACK]. The corresponding LED will change from blinking to steady for the duration of the condition.
Except for CLEAN ME trouble indications.
Silence Panel
Press [SILENCE]. This will silence the on-board PZT and all active NAC circuits that have been configured
as "silenceable".
Perform system reset
Press [RESET]. Resets alarms, supervisories, troubles and all LEDs.
Manual Dialer Test.
Press the [ACK] and [ SILENCE] buttons at the same time.
Dialer Reset.
Press the [RESET] and [WALK TEST] buttons at the same time.
For Service Contact:
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