Optional device locking
The device includes an optional locking mechanism. Remove
the thin section of plastic shown in Figure 5.
Device unlocking
If the device has been locked, an Allen key will be required for
unlocking:
Insert the Allen key, or similar, into the device's cavity and
1.
push (Figure 6, item 1).
2.
Simultaneously twist the device anti-clockwise to release
(Figure 6, item 2).
Operation
Status LED indications
The status LED indications are as follows:
LED
Status
Description
The status LED flashes red every 45 seconds
Flashing
Normal
to indicate normal status
On
Alarm
Alarm (smoke has been detected).
LED continuously illuminated red.
Off
Fault
Maintenance is required. Check the control
panel for further information (wait at least 1
minute to ensure the LED is off).
The Test button
The Test button operations are as follows:
•
Silence the low battery alert: Press the button for one
second to silence the audible low battery alert (the alert
resumes after 24 hours if the batteries are not replaced).
•
Sensitivity and Alarm test: Press the button for four
seconds to perform a sensitivity test and to send a test
alarm signal to the control panel. Refer to "Testing the
device" below for details.
•
Remote monitoring station alarm test: Press the button for
fifteen seconds to send a fire alarm signal to the remote
monitoring station.
Important:
To avoid a fire department dispatch, contact
the remote monitoring station or put the control panel into
the corresponding test mode before performing this test.
Configuration switch
The 6-way configuration switch, located in the middle of the
device's battery tray provides additional settings as follows:
Switches 1 to 3 – sounder tone selection:
Switch settings
Primary tone
3 kHz continuous (default)
3 kHz 1s on/off*
3 kHz 0.5s on/off*
3 kHz 0.25s on/off*
520 Hz 1s on/off
P/N MK256-ML • REV F • ISS 04FEB22
Switch settings
*
Tone approved to EN14604
Switches 4 to 6 – detector sensitivity selection:
Switch settings
Device fault tones
•
3 chirps every 45 seconds: Battery low/missing fault
•
1 chirp every 45 seconds: General device fault (device
tamper or sensor fault)
Testing the device
Siren and signal integrity test
Test each device to verify that siren and signal integrity
responses are adequate.
Caution:
hearing protection should be worn to prevent hearing damage.
Note:
Refer to your control panel documentation for detailed
information on system response.
To test the siren, sensor and signal integrity:
1.
Put the control panel into the corresponding test mode.
Press and hold the device's Test button. The LED will
2.
flash amber once every second.
3.
After four seconds, the device sounds the selected tone to
confirm test success. This test tone is at a reduced volume
to the alarm condition to avoid excessive exposure to the
user during test. The device will send test confirmation to
Volume
the control panel. Reception of the signal will confirm
High
signal integrity. The LED will begin to flash red once every
second (up to a total of fifteen seconds).
High
continues to hold the button for a total of 15 seconds the
remote monitoring alarm signal is sent and the sounder
High
stops sounding. The LED will illuminate continuously red
for several seconds.
High
4.
Should the device fail the test, it will not sound and a fault
Medium
signal will be sent to the control panel. The LED will
continue to flash amber. The device will also chirp once
Primary tone
970 Hz 1s on/off
3 kHz 0.25s on/off
3 kHz Continuous
Sensitivity
Smoke (High) and Heat Class B (72°C) (default)
Smoke only (High)
Smoke only (Low)
Heat Class B only (72°C)
Heat Class A2 only (58°C)
Smoke (High) and Heat Class A2 (58°C)
Smoke (Low) and Heat Class B (72°C)
Smoke (Low) and Heat Class A2 (58°C)
When testing the siren's sounder pressure levels,
Volume
Medium
Low
Low
Note:
If the user
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