Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 182 / 2536

363-206-285
Shelf Descriptions and Configurations
3-28 Issue 3 June 2001
■
The ALARM TEST pushbutton provides a test of the fan shelf alarms.
When pressed and held, all LEDs except the CONTROL FAULT LED and
POWER FAULT LED will be lit. After a test is done, the ALARM RESET
pushbutton must be pressed to turn the LEDs off. This is a local test; the
alarm on the fan shelf alarm interface is not activated.
■
Four red FAN FAULT LEDs indicate faults in each of the four independent
fan units.
■
The red FILTER REPLACE LED indicates that it is time to replace the filter.
■
The red CONTROL FAULT LED indicates a fault in the fan shelf monitoring
and control system.
■
The red POWER FAULT LED indicates a failure in one of the
−
48 V power
feeders.
■
The green POWER ON LED indicates that the fan shelf is receiving power
from one of the two
−
48 V power feeders.
■
Two pushbutton circuit breakers are located near the right side of the front
of the shelf.