
Chapter 17 Hardware procedures 683
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
not resettable. The fuse’s in-rush circuit has an electronic over-current
protection which prevents the fuse from blowing under normal operation
or limited-duration short circuits. The fuse will blow only under unusual
electrical circumstances.
Procedure steps
1
Locate the fan with a lit red LED, which indicates the fan is out of service.
The lower (front) cooling unit also has duplicate LEDs for the upper (rear)
cooling unit, as shown in the figure “Location and orientation of the fans
on an upper (front) or lower (rear) cooling unit” (page 684). If more than
one is lit red, give priority to any on the lower (rear) cooling unit. The fan
closest to the lit red LED is the one to be replaced.
2
Unplug the power cable to the fan. A power cable connection is labeled
F1, F2, or F3.
When the cable is unplugged:
•
the red LED turns on (may already be on) and the green LED turns off
•
software alarm 7012 0051 is generated to indicate a fan failure
•
the BIP alarm module indicates a minor cooling unit alarm
•
the remaining 2 fans increase rpm speed to compensate an out-of-
service fan unless they have already done so due to a fan or fan
controller failure
3
Watch for the fan blades to stop.
When the fan blades stop, put tape on a blade to temporarily fasten it
securely to the shroud. Otherwise, the blades will automatically reverse
direction and spin freely because of the airflow from the other fans. Injury
or damage can occur when removing free-spinning fan blades. The
direction of blade rotation is opposite for front and rear fans. The direction
under power is indicated on the top outside lip of each fan shroud.
4
At the front of the fan, unfasten the two M4 hex-head screws at the sides.
Put the screws and the finger guard grill aside for re-use.
5
Grip the outside of the fan shroud, and using firmly even force, pull the fan
assembly straight out of the cooling unit. Put the fan aside.
6
While looking into the opening where the fan was removed, on the fan
controller NTHR10 behind and below or above the opening, check the
fuse for evidence of blackening. Refer to the figure “Location of the fuse
on fan controller NTHR10AA” (page 685). You may need a flashlight and
a hand mirror to see the fuse clearly.
Summary of Contents for Passport 15000
Page 1: ...Passport 15000 20000 Hardware Installation Maintenance and Upgrade 241 1501 240 ...
Page 2: ......
Page 4: ......
Page 6: ...6 Publication history 241 1501 240 5 2S2 ...
Page 32: ...32 Contents 241 1501 240 5 2S2 ...
Page 48: ...48 About this document 241 1501 240 5 2S2 ...
Page 52: ...52 Chapter 1 Overview of hardware tasks 241 1501 240 5 2S2 ...
Page 70: ...70 Chapter 2 Safety considerations and best practices 241 1501 240 5 2S2 ...
Page 84: ...84 Chapter 4 Alarm BITS module 241 1501 240 5 2S2 ...
Page 94: ...94 Chapter 5 CP and FP cables 241 1501 240 5 2S2 ...
Page 178: ...178 Chapter 11 Initial switch hardware installations 241 1501 240 5 2S2 ...
Page 182: ...182 Chapter 12 MAC address module 241 1501 240 5 2S2 ...
Page 216: ...216 Chapter 14 Power and ground hardware of a Passport 15000 or 20000 241 1501 240 5 2S2 ...
Page 872: ...872 Chapter 17 Hardware procedures 241 1501 240 5 2S2 ...
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