Operation
Switch Functions
16
Document 51338 Rev. B 08/24/05 P/N 51338:B
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
corner 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
counterclockwise 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,
supervisories) are scrolled on the display at a one second rate, but
may be held for sequential display by pressing and holding the
Acknowledge switch.
ATOR
Alm. Silenced
y
Key-switch (shown in Off position)
