Fault Monitoring; Fault Indication - ASL INTERCOM VAR8-ACU Product Description

5

Fault Monitoring

The mode of operation is fully compliant with BS5839 Pt 8:1998 and BS EN54-2:1998 in the fault types that
are displayed and the mode of display.
Active faults, the system fault log, and the frame fault logs can be viewed on the LCD display. Active faults
can be accepted and cleared through the front panel buttons, or the user interface's 'Faults' menu.
In order to time-stamp the fault reports the VAR8-ACU features a Real Time Clock (RTC). The unit is fitted
with an internal Lithium battery to keep this clock running when the power from the Router is turned off.
5.1

Fault Indication

When the system has no faults present, the Audio Control Unit displays the current time and date on the
LCD display, and indicates that the system is healthy.
No Fault
If a fault occurs on a particular unit, then the unit displays text describing the fault. A display of the fault is
alternated with a display of the current date and time. In the event of multiple faults each fault is displayed in
sequence, while alternating with the date and time display. Faults are time and date stamped as they occur
and added to the fault log.
Fault Indication
When a fault is detected at the Audio Control Unit, the built-in loudspeaker emits an alarm tone and the front
panel 'fault' LED flashes. The alarm tone is compliant in tonal characteristics and SPL with BS5839 Pt 8
(Section 7.3), and the indicator flash rate is compliant with BS EN45-2.
The Audio Control Unit regularly interrogates all Slave Units for faults, and indicates its own faults, network
faults, and the presence of faults of Slaves in a similar manner as described above.
The 'fault' LED may be steadied and the loudspeaker may be muted by pressing the front panel FAULT
ACCEPT key, or through the user interface's 'Faults' menu.
If one or more faults are detected from a Slave Unit, then the Audio Control Unit logs a single fault identifying
the Slave Unit. It does not detail the particular fault. The user needs then to interrogate the Slave Unit for
details of the fault. This can be done at the Slave Unit itself, or from the Audio Control unit.
Newly occurring faults cause the sounder to resume sounding, and the 'fault' LED to resume flashing.
VAR8-ACU and Variants - Product Description
fault
FAULT
Press to silence the Sounder and
ACCEPT
steady the LED.
Issue: 02 complete, approved
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Sounder