Federal Signal Corporation Personnel Alerting System, Installation And Operation Instructions Manual

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MAINTENANCE
77
WARNING
The sound output of speakers is
capable of causing permanent hearing
damage at short distances. Therefore,
ALWAYS wear hearing protection when
performing tests or maintenance on the
speakers.
To prevent the speakers from sounding,
always turn off the power to the UVIC at
the AC disconnect and remove any DC
power being supplied before inspecting
or maintaining the speakers.
7.1 Control Unit Preventive
Maintenance
Test the UVIC for proper operation at
least once a month. A daily test at noon,
curfew, or other selected time is
preferred. This not only enhances the
usefulness of the UVIC and verifies that
it remains ready for use when needed; it
also instills confidence in the reliability of
the system.
In order to minimize the potential for a
failure, annual inspection and
maintenance is recommended.
7.2 General Maintenance
Signal Operational Check
1. When checking for proper control
module output, unplug the terminal
strip connectors to the speakers (at
the bottom of the system
motherboard) to eliminate output
from the speaker array.
2. Activate each of the signals and
observe the signal indicators on the
control module and the amplifiers.
3. If desired, an oscilloscope or digital
multi-meter (DMM) can be
connected to the amplifier module
output terminal strip to observe the
amplifier output. This output should
be at least 67 Vrms during a signal if
the amp is programmed to run at full
power. To limit sound output, plug in
one amplifier at a time during this
test.
4. Plug all of the amplifier terminal strip
connectors to enable amplifier
outputs.
Battery Check
1. The voltage of a fully charged set of
batteries should be approximately
27.2 VDC, and charger current
should be less than 2 Amperes. The
charger is set for 27.2 +/-0.1 VDC at
room temperature.
2. Load test the batteries per the
manufacturer’s specifications.
3. Maintain or replace the battery as
recommended by its manufacturer;
obey local or state laws governing
the disposal of lead-acid batteries.
4. Check the battery terminals for
corrosion. Clean and grease
connectors and terminals, if
necessary.