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14 Faults
14.1 Fault Indicators
In normal operation the LED indicators illuminated are the "power on" and the "auto" LED.
There are five types of fault LEDS.
1.
"Module Fault" LED.
A Module Fault indicates that a local module is either disconnected or faulty.
2.
"System Fault" LED.
A System Fault indicates that a module or Main CPU has failed anywhere in the system.
3.
"Communications Fault" LED.
A Communications Fault indicates that the one of the communication lines between ECP's/RPC's is
faulty or there is an interruption or short on the EWs or EIS audio bus.
4.
"Auxiliary Fault" LEDS.
The Auxiliary Fault LED's indicate that a non-processor module is not functioning.
5.
"Zone Fault" LEDS.
The Zone Fault LED's allow detection of faults within EWS and EIS zones.
Note: The Fault Sounder will operate, sounding one second pulses every two seconds, if a fault
condition exists on any circuit or its associated module.
Refer to Section 8.1.9 for more information.
14.2 Fault Diagnostics
To help with fault diagnosis the MECP will identify zone fault types.
To this end four zone fault diagnosis buttons are included on the Emergency Control Panel.
Refer to Section 8. for the operation of these switches.
MAN1813-9
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