Omni8/16C/Omni8P User Manual
UMC1480R24.pdf
67
© Omniflex 2021
If the circuit Test fails then the unit enters its “marching sequence” test routine described in Section
6.3.5 and the test failure code will be displayed by flashing one of the lamps continuously.
In this way, the display/annunciator Test button acts both as a Lamp Test and Circuit Function.
6.3.3
Fault Indication on Circuit Test
If a fault is found in one of the tests performed, then the unit enters its full “marching lamp sequence”,
with, in addition, one or more of the lamps flashing continuously to indicate the fault located. This is
described in detail in Section 6.3.5.
6.3.4
Manually invoking the Circuit Test Function
As a confidence measure, the unit may be placed in the full “marching sequence” Circuit Test Mode at
any time by holding down the Silence button and then pressing the Test Button. See section 6.3.5.
6.3.5
The "Marching Sequence" Circuit Test Display
This routine is entered upon the following conditions:
Upon power up.
If the Test button is pressed and a fault is detected in the unit.
By holding down the Silence button and then pressing the Test button manually enters this
function.
Any time during normal operation, if the unit during its regular self-test routines detects a fault.
This test routine begins by activating the horn output circuit for approximately one second.
The operator should therefore check that the horn sounds for this short period.
Immediately after this half-second period, if the Omni8/16C is functioning correctly, the following visual
indication will occur:
The display will begin a “marching light” sequence, with each display window illuminating and then
extinguishing, one at a time, starting with the display point 1 (top left-hand window) and ending with the
display point 8 or 16(bottom right-hand window). All display windows will then remain extinguished for
a brief moment.
The “marching” sequence will then begin again, and this procedure of “marching” sequence followed by
the brief “blank” display period will be repeated continuously until the ACKNOWLEDGE pushbutton is
depressed, or until an input changes state.
This marching sequence indicates that the alarm annunciator has passed all its own internal tests and
is functioning correctly. If the lamp display exhibits any other pattern then a fault has been detected,
and the unit should be returned for service.
To exit the test mode and begin normal operation, the ACKNOWLEDGE pushbutton should be pressed.
The pushbuttons may also be tested in this mode:
If the SILENCE button is depressed - lamp No. 1 flashes continuously.
If the ACK button is depressed - the annunciator reverts to normal operation.
If the RESET button is depressed - lamp No. 3 flashes continuously.
