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3. LEDs
System LEDs
The three system LEDs, OK, TEST, and ALARM, have meaning at all times, as
shown in
Table 3-2.
3-4
Table 3-2, System
System LEDs
OK
ALARM
TEST
Off
Off
Off
Off
Off
ON
Off
ON
Off
Off
ON
ON
ON
Off
Off
ON
Off
ON
ON
ON
Off
ON
ON
ON
April 2002
LEDs.
Description
Unit is powered Off.
Unit Failed – LEDs should never be in this state.
Notify your service representative.
Unit Failed – The unit has power, but never
completed its initialization process. Notify your
service representative.
Self-Test – The LEDs should be in this state
only during self-test, immediately after the unit is
turned on.
Normal Operation – Unit has successfully
passed self-test, there are no alarms in the
system, and none of the ports is in test mode.
Test Mode – At least one port is in test mode.
Alarm – Unit has failed self-test, or a major
alarm condition exists. Notify your service
representative.
Alarm – At least one port is in test mode, and a
major alarm condition exists. Notify your service
representative.
4821-A2-GN20-00
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