70
Audio Command Center Series Manual —
P/N 51889:E1 6/8/2010
Operating Instructions
Operation
Ground Fault (main circuit board)
This yellow LED turns on steady when a ground fault condition (zero impedance to ground) is
detected on the system.
Amp Supv - Supervision (Audio Amplifier Module)
This green LED (one on each amplifier), when on steady, indicates that the amplifier is fully func-
tional. The ACC-25/50 Series panels constantly test the amplifier to verify proper operation.
Circuit Trouble (Audio Amplifier Module)
This yellow LED (one on each amplifier) turns on steady when a trouble is detected in the amplifier
or to indicate an open or short circuit on the field wiring attached to the amplifier output terminals.
Remote Microphone Trouble (Optional FC-MIM Microphone Interface Module)
This yellow LED turns on steady when a remote microphone trouble is detected from the FC-RM
or wiring
4.5 Operation
The ACC-25/50 Series continuously monitors system status. When no system alarm or local trou-
ble conditions exist, all LEDs are off except the Power On LED located on the front panel keypad,
the amplifier supervision LED(s) and the AC Power LED located on the main circuit board. The
Notification Appliance Circuits (speakers) are off and all relays are in their normal state. Zone acti-
vations and local troubles are annunciated by the ACC-25/50’s LEDs.
4.5.1 Fire Alarm
The ACC-25/50 Series will, upon detection of an alarm condition (CMD1, CMD2 CMD3, CMD4
or CMD5 Inputs active or via the ACS):
Turn on the appropriate Zone LED steady
Turn on the appropriate Notification Appliance Circuit speakers (depending on CMD input
source)
Turn on the appropriate Audio Amplifier(s)
Transmit the tone before message if programmed (repeating tone number of times
programmed)
Transmit the appropriate digital voice message (repeating message number of times
programmed)
Transmit the tone after message if programmed (repeating tone number of times
programmed)
Transmit a primary evacuation tone only (if programmed)
4.5.2 Fire Alarm Restoral
Turn off the Zone LED located on the front panel
Turn off the Notification Appliance Circuits
Turn off the Audio Amplifiers
Turn off the digital voice message or tone at its present point in transmission
4.5.3 Manual Evacuation/Alert
Dual Zone Operation
The ACC-25/50 Series will, upon pressing of the Zone 1 and/or Zone 2 push-button (if pro-
grammed to do so) followed by the Message 1 push-button:
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