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Operation
2.2
Switch Functions
2.2.1 Key-switch
The key-switch is used to enable
and disable the operation of the
function switches if switch 1 on
DIP switch SW1 has been placed
in the Off position.
To enable the Acknowledge,
Silence, Drill and Reset function
switches, insert key into key-
switch located at the top right cor-
ner of the LCD-80F. Make certain
the key is inserted completely
before attempting to turn it. Turn
the key clockwise until it stops.
Leave the key inserted while pressing the function switches. When
finished with the function switches, turn key-switch counterclock-
wise to disable function switches.
Note that the key-switch should normally be in the disabled position
(fully counterclockwise), with the key removed and access to the key
restricted to authorized personnel only. Do not leave the key
unattended in the LCD-80F.
2.2.2 Acknowledge/Step
When the Acknowledge/Step switch is pressed and released, the
LCD-80F sends an Acknowledge command to the control panel.
Pressing the Acknowledge switch silences the local piezo sounder,
the sounders located in all other system annunciators and the
sounder located on the Fire Alarm Control Panel's main circuit
board. Only one press is necessary regardless of the number of new
alarms, troubles or supervisory signals.
An acknowledge message is also sent to the printer and the history
files in the FACP. Multiple active events (alarms, troubles, supervi-
sories) are scrolled on the display at a one second rate, but may be
held for sequential display by pressing and holding the Acknowledge
switch.
Document 51338
Key-switch (shown in Off position)
O R
Alm. Silenced
Rev A
01/10/01 P/N 51338:A
Switch Functions
15
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