363-206-295
Shelf Descriptions and Configurations
Issue 1
December 1997
3-21
The following pushbuttons and LEDs are accessible through the front cover of the
fan shelf:
■
The ALARM RESET pushbutton near the left side of the front of the shelf is
used to reset fan shelf alarms and register a new combination of set-point
switch settings. Once a fan shelf alarm is turned on, it can be reset only by
clearing the trouble condition and then pressing the ALARM RESET
pushbutton.
■
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.
