Whelen 295SLSA1 - Manual (Page 5)

Page 5
Diagnostic Indicators:
This unit has two diagnostic indicators on the front panel which
are used to indicate fault conditions with your siren system. The
following table lists the type of fault and the indicators response.
If the indicator is on steady while a tone is in use, this implies
that there is no fault with the associated speaker output.
Fault Condition Diagnostic Indicators Response
Under Voltage Speaker LED #1 will be in a
DoubleFlash mode (2 quick flashes
followed by a longer pause) and the
siren tones will not operate.
Over Voltage Speaker LED #2 will be in a
DoubleFlash mode (2 quick flashes
followed by a longer pause) and the
siren tones will not operate.
Speaker #1
Short Circuit
Speaker LED # 1 will be in a
SingleFlash mode (the LED will be on
and off an equal amount of time) and
the siren tones will not operate.
Speaker #2
Short Circuit
Speaker LED #2 will be in a
SingleFlash mode (the LED will be on
and off an equal amount of time) and
the siren tones will not operate.
Speaker #1
Open Circuit
Speaker LED #1 will be off (having a
single speaker system will always
cause this condition for the speaker
output not in use) all tones will
continue to operate.
Speaker #2
Open Circuit
Speaker LED #2 will be off (having a
single speaker system will always
cause this condition for the speaker
output not in use) all tones will
continue to operate.
RAD
2
HF
T3
HORN
MIC
T1
T2
Radio Repeat Volume (RAD)
Locate the Radio Repeat adjustment port as
shown. Set the volume level of the vehicle’s
two-way radio to it’s normal operating
volume. Turn the Rotary Knob to RAD to
activate Radio Repeat. Insert the screwdriver
in the Radio Repeat adjustment port and turn
clockwise to increase the volume.
M A N
RAD
MAN
SPEAKERS
POWER
1 2
SI TEST ® & Diagnostic Indicators
SI TEST ® is a diagnostic feature and
allows the operator to confirm the proper
operation of the siren speakers connected
to the unit without activating an audible
siren tone. To initiate the SI TEST® cycle,
set the rotary knob to the RAD position.
Now press and release the MAN button. As
the siren is tested, its diagnostic indicator
will turn on steady for about 1.5 seconds if
no problems are detected. If the indicator
flashes or does not light at all, a problem
with either the siren, speakers or wiring has
been detected. Check the wire connections
of the failed speaker and repeat the SI
TEST®. If the speaker fails again, have the
siren inspected by a qualified technician.
WARNING: Installed speakers are tested by
generating a ultra-high frequency tone
through each speaker. Although these
tones are inaudible to humans, be sure
there is nobody within 5 feet of the speakers
when SI TEST® is running.