Installation guide
VAR4 / VAR12 / VAR20 - Product Description
4 System Controller Functions
4.1 Configuration Mode
This mode is provided to enable an engineer to commission the system.
Access to this mode can only be gained by entering the appropriate access code.
Please refer to the VAR Router Operation Manual for detailed description of the configuration functions.
4.2 Test Mode
The VAR Router can initiate and control a number of unit and system tests:
• all health/fault status indications can be checked by the operation of the Lamp Test function;
• amplifier output can be displayed and monitored audibly by the Audio Mon function;
• changeover/changeback to standby amplifiers can be forced;
• the detailed configuration and operational status of each mainframe and amplifier module can be
interrogated.
4.3 Fault Monitor Mode
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 by front panel buttons. The unit communicates with the amplifier mainframes
via the Audio-CAN bus for gathering fault status.
4.3.1 Real Time Clock (RTC)
In order to time-stamp the fault reports the VAR Router 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 VAR Router is turned off.
4.3.2 Fault Indication, Acceptance and Clearance
When the system has no faults present, the unit displays the current time and date on the LCD display and
indicates that the system is healthy.
If a fault occurs, 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.
It is possible to separately view a list of all currently active faults. Multiple faults can be examined by scrolling
through the list by means of the front panel switches or rotary knob.
When a fault is detected the front panel ‘fault’ LED flashes, and the built-in loudspeaker emits an alarm tone.
This tone is compliant in tonal characteristics and SPL with BS5839 Pt 8 (Section 7.3), the indicator flash
rate is compliant with BS EN45-2.
The ‘fault’ LED may be steadied and the loudspeaker muted by pressing the front panel FAULT ACCEPT
key, or through the user interface’s ‘Faults’ menu.
Newly occurring faults cause the sounder to resume operation and the ‘fault’ LED to resume flashing.
Issue: 03 complete, approved
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