Omni30 User Manual
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© Omniflex
UMC1620AR04
5.3.3 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 5.3.5
5.3.4 Manually invoking the Circuit Test Function (only through serial port).
As a confidence measure, the unit may be placed in the full “marching sequence” Circuit Test
Mode at any time by activating Silence and then Test.
See section 5.3.5
5.3.5 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.
•
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 Omni30 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 (left-hand window) and
ending with the display point 8 (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 ACCEPT
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 ACCEPT pushbutton should be
pressed.
The pushbuttons may also be tested in this mode:
If the ACCEPT 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 service.
If a new alarm occurs while the Omni30 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.
It is possible under some circumstances to continue to operate the Omni30 even after a fault
has been detected. The table below will assist in diagnosing the fault found.
