Whelen 295HFS4 - Manual (Page 5)

Page 5
VOL SPK2 SPK1
YELP
WAIL
T3
VOL SPK2 SPK1
PIER
FRONT of CONTROL HEAD
Microphone
Volume Adjust.
BACK of AMPLIFIER
Radio Rebroadcast
Adjustment Screw
20 AMP
FUNCTION
HF
MAN
PA
WAIL
T3
To Adjust the Radio Repeat Levels: Before using the
295HFS4, the Radio Repeat output volume and microphone
volume (PA) must be adjusted to satisfactory operating levels.
To adjust this level, a small, flat-blade screwdriver is needed.
Locate the Radio Repeat adjustment port (potentiometer) to the
left of the 12-position input port on the back of the remote ampli-
fier. Set the volume level of the vehicle’s two-way radio to it’s
normal operating volume. Turn the Rotory Knob on the control
head to RAD to activate Radio Repeat. Insert the screwdriver in
the Radio Repeat adjustment port and turn in a clockwise direc-
tion to increase the sound level.
Microphone Volume (PA) Locate the microphone adjustment
port (potentiometer) below the microphone cord. With the vehi-
cle in an enclosed area, turn the Rotory Knob to PA and speak
into the microphone. While speaking, turn the screwdriver in a
clockwise direction to increase the volume. Continue to
increase the PA volume until audio feedback occurs, then turn
the screwdriver in a counter-clockwise direction until the feed-
back is eliminated.
Operating the 295HFS4 Controls:
Power Switch This switch has two posi-
tions: Down / Off and Up / On. When this
switch is in the Off position, the unit will not
function. When the switch is in the On posi-
tion the siren is functional and may be acti-
vated at the operator’s discretion. NOTE: If
the 295HFS4 is connected to the vehicle’s
horn ring circuit, the vehicle horn is disabled
when the 295HFS4 power is ON.
MAN Button The Manual button gener-
ates a variety of tones, depending on what
position the rotary knob is in. For further
explanation of this button’s function, refer to
the Rotary Switch Operations section of this
manual.
Rotary Knob The Rotary Knob controls
the siren and PA (Public Address) functions
of the 295HFS4. There are 7 positions that
may be selected. Each position and it’s func-
tion is outlined in the Rotary Switch Opera-
tions section.
POWER
ON
ON MAN
PA
RAD
SI-TEST ®
SI-TEST is a diagnostic feature
of the 295HFS4 and allows the operator to
confirm the proper operation of the siren
speakers connected to the 295HFS4 with-
out activating an audible siren tone. To ini-
tiate the SI-TEST cycle, set the rotary knob
to the RAD position. Now press and hold the
MAN button for at least 5 seconds. As the
siren is tested, its diagnostic indicator will
turn on if no problems are detected. If the indicator doesn’t light,
a problem with either the siren or its connectors has been
detected. Check the wire connections for the failed speaker and
repeat the SI-TEST. If the speaker fails the test again, have the
siren itself inspected by a qualified technician.
NOTE: Installed speakers are tested by generating an ultra-
high frequency tone through each speaker. Although these
tones are inaudible to humans, be sure that there is nobody
within at least 5 feet of the speakers when SI-TEST
® is running.
DIAGNOSTIC INDICATORS: This unit has two diagnostic indi-
cators on the front panel which are used to indicate fault condi-
tions with your siren system. The table on the next page 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 #2 will be in a double flash
mode (2 quick flashes followed by a longer
pause) and siren tones will not operate.
Over Voltage Speaker LED #1 will be in a double flash
mode (2 quick flashes followed by a longer
pause) and siren tones will not operate.
Speaker #1 Speaker LED # 1 will be in a single flash
Short Circuit mode (the LED will be on and off an
equal amount of time) and siren tones will
not operate.
Speaker #2 Speaker LED #2 will be in a single flash
Short Circuit mode (the LED will be on and off an
equal amount of time) and siren tones will
not operate.
Speaker #1 Speaker LED #1 will be off (having a
Open Circuit single speaker system will always cause
this condition for the speaker output not in
use) all tones will continue to operate.
Speaker #2 Speaker LED #2 will be off (having a
Open Circuit single speaker system will always cause
this condition for the speaker output not in
use) all tones will continue to operate.
CAUTION
Loud siren noise can cause
hearing damage and/or loss.
Refer to OSHA Section 1910.95 prior
to putting ANY siren into service!
Wear
Protection!
ACTIVATION OF THIS
SIREN MAY DAMAGE
UNPROTECTED EARS!