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How to Operate a Control Panel with a System Trouble
20 AFC-600 Operations PN 51033:A 3/8/99
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The system goes into system trouble when the control panel detects an electrical or
mechanical fault. Figure 9 shows how the control panel indicates a system trouble.
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If no fire alarms exist, a control panel in system trouble does the following:
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• Produces a pulsed audible tone
• Flashes the
SYSTEM
TROUBLE
LED
• Activates the MPS-6 Trouble relay (MPS-6, TB5)
• Sends a message to the LCD display, History buffer, and installed printers, terminal
mode LCD-80s, and CRT-2s
Figure 10 shows a typical trouble message that appears on the LCD display:
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