C1477B User Manual (UMC1477BR04)
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Copyright Omniflex
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
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 (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 repair.
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.
If the TEST button is depressed - lamp No. 4 flashes continuously.
If any other lamp flashes continuously, then the unit has detected a fault and must be
returned to the factory for repair.
If a new alarm occurs while the Omni8
is in this test routine, the unit will immediately
revert to its normal mode of operation and will deal with the alarm state according to the
pre-selected alarm sequence.
6.4 Use of the inhibit input
When SW1-8 is off, then input 8 operates in the normal fashion. When SW1-8 is switched on,
then input 8 is converted into an inhibit input as operates as follows:
If input 8 is in the abnormal condition all of the other alarm inputs will be disabled from causing a
new alarm. All other functions of the unit will remain unaffected.
