Document: LT0554
Vigilant BOWS Installation & Operation Manual
Issue 1.20
6 September 2012
Page 5-1
The BOWS has two fault indicators on its front panel: Audio Fault and
Power Supply Fault. If either of these two LEDs are on check the
following to determine the source of the fault.
The BOWS AUDIO FAULT LED is turned on steady if:
T-GEN 50 (master or slave) is in fault, or
SDM-4 (if fitted) is in fault.
If a master T-GEN FAULT LED is on check the following:
100V line open or short circuit
56k (or 2 x 100k) EOL resistor missing from the end of the 100V
line
Alarm I/P monitoring turned on (T-GEN SW4 On) and EOL
resistor missing or cable fault on wiring to the BOWS ALM- input
SIG wire between the master and slave T-GEN faulty
T-GEN Amplifier faulty or over loaded.
If a slave T-GEN FAULT LED is on check the following:
100V line open or short circuit
EOL resistor missing from the end of the 100V line. Note that on
the 100W BOWS a 56k EOL resistor is fitted directly across the
100V line terminals of the slave T-GEN
SIG wire between the master and slave T-GEN faulty
T-GEN Amplifier faulty or over loaded.
The SDM-4 card has an O/C and S/C FLT LED per speaker zone (100V
Line).
If one or more yellow fault LEDs on the SDM-4 are turned on check:
O/C FLT LED:
100V line open circuit or EOL resistor missing
on the indicated zone
S/C FLT LED:
Short on the indicated zone.
Single flash: Faulty BOWS Interface board (replace).
Double flash: Check the link settings on the BOWS Interface board
(invalid setting)
Chapter 5
Diagnostics
AUDIO FAULT
or POWER
SUPPLY
FAULT LED On
AUDIO FAULT
On
AUDIO FAULT
Flashing
