Test the System
LED Indicators
486 SI Installation and Upgrades
June 2004
Figure 179: Circuit Pack LEDs on Faceplate
Circuit Pack LEDs
LED
Color Status Description
Red Alarm The system has detected a fault in this circuit pack. The alarm log should
contain an on-board alarm. The red LED is also lit briefly when a circuit
pack is inserted or reset. If the circuit pack passes its initialization tests, the
LED goes out.
Green Testing The system is currently running tests on this circuit pack as part of
background maintenance or demand testing. This LED is also lit during
initialization tests when a circuit pack is inserted or reset.
Yellow Busy The circuit pack is currently in use by the system.
Figure notes
1 Alarm LED (Red)
2 Test LED (Green)
3 Busy LED (Yellow)
4 Latch Pin
5 Locking Lever
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