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Status LEDs
5.2 Status LEDs
Figure 5.2.1 lists the Status LEDs.
Normal Level LED – During normal (non-
alarm) conditions, when this green LED
is on and the Incorrect Level LED is off,
the audio amplifier is adjusted properly.
Note: During a loss of primary (AC)
power, when the amplifier is operating on
secondary (battery) power, no LEDs will
light on the amplifier.
Incorrect Level LED – During normal
(non-alarm) conditions, this LED indi-
cates that the audio amplifier is out of
adjustment. When this LED is on and the
Normal Level LED is off, the audio level
adjustment is too low. When both this
LED and the Normal Level LED are on,
the audio level adjustments is too high.
5.3 Selecting the Default Backup Tone
1.
Use SW1, located in the lower right-
hand corner of the amplifier circuit
board, to select Hi/Lo or Slow
Whoop as the default backup tone.
2.
The backup tone will start
automatically if low-level audio
input to the amplifier is lost or when
the amplifier has been configured for
stand-alone operation.
AA-100/AA-120 Audio Amplifiers Installation/Operation Manual — P/N 9000-0573:C 03/12/2020
Figure 5.2.1 Status LEDs
SW1
Backup Tone/
Stand-Alone
Tone Switch
Figure 5.3.1.1 SW1 Backup Tone
Terminals and Connectors
SW1 (see detail below)
Battery Trouble LED – The battery
voltage has fallen below a sufficient
level.
Brownout LED – AC power source
has fallen below an acceptable level.
Output Trouble LED – An open/short
circuit condition exists in the 4-wire
high-level output (or 70 V transformer
on the AA-100/AA-100E).
Input Trouble LED – Loss of the low-
level audio input signal, or internal
amplifier failure.
Amplifier Trouble LED – Loss of the
high-level audio signal, or internal
amplifier failure.
Note: The amplifier will indicate a
trouble condition within 90 seconds.
HI/LO
SLOW
WHOOP
15
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