Operating the Siren
18
PA4000 Electronic Siren System
Federal Signal
www.fedsig.com
Press-and-Hold Function
NOTE:
For the press and hold functions to operate with the horn ring, the Control
Head horn ring switch must be in the Siren position.
Additional alternate sounds can be activated when the Selector switch is set to
Manual or Priority. While pressing and holding the horn ring and the Selector switch
set to Manual, the peak-and-hold siren sounds. In the Priority position, the air horn
sounds. Releasing the horn ring causes the siren to revert back to the original
function.
The Tap II functions can also be activated by pressing the Manual Siren switch.
Table 3 Tap II Functions
First Tap
Second Tap
Selector
(Manual)
(Manual)
Wail
Yelp
Wail
Yelp
Priority (Hi-Lo)
Yelp
Priority
Air Horn
Air Horn
NOTE:
Peak-and-hold siren and air horn are the “Press and Hold” features.
Aux in Function
If installed, set the selector to switch to the Manual position. Activate the installed
auxiliary switch to sound the wail tone. To deactivate the wail tone, move the selector
switch to the Wail position and back to the Manual position.
Aux out Function
If installed, this function activates warning lights any time wail, yelp, or priority is
sounding.
Speaker Diagnostic Test
To test the speakers, set the selector switch to Radio. Press theAir Horn/Manual
paddle switch down. Four rapid beeps sound and the yellow LEDs flash four times.
Note that the yellow LEDs illuminate when a siren tone is sounding.
Park-Siren Deactivator
If installed, shifting the vehicle into Park silences the siren tones. Move the shift lever
to another position to sound the siren tone.
PA and Radio Gain Adjustment
The PA4000 comes from the factory with the PA and Radio Gain set to maximum.
To decrease the gain settings, proceed as follows while referring to Figure 1 on
page 13.
1.
Locate the PA and radio potentiometers on the logic PC board near the RJ45 jack.
2.
Using a small flat blade screwdriver, rotate the appropriate potentiometer to the
desired volume setting.
