Cisco UBR10012 Quick Start Manual page 55

Note
Fan assembly modules
PRE modules
When the power-on sequence is complete, the PRE begins to initialize the line cards. Continue with the
next section,
Power On the AC Power Entry Module
The power-on procedure is the same for both the AC PEM modules (UBR10-PWR-AC= and
UBR10-PWR-AC-PLUS=).
To power on the AC PEM modules:
Ensure that the AC power cables are plugged into the facility power source, see
Step 1
Entry Modules" section on page
If you are using the UBR10-PWR-AC-PLUS= module, two AC power cables must be installed for the
Note
unit to operate.
Step 2 Remove any tape and power on the power source that is suppling the AC power for the chassis.
The internal fans of the UBR10-PWR-AC-PLUS= PEM module start running and are audible as soon as
Note
the AC-input power cables are connected to the facility power source and the facility power is turned on,
although the AC power enable switch is in Standby (0) position.
OL-24972-01
If the other LEDs on the DC PEM (MISWIRE or FAULT) illuminate (yellow), see the
"Troubleshooting" section on page
Listen to the fans as power is applied. When you first apply power to the chassis, the fans in the
•
fan assembly module initially operate at high speed. If all fans are operating correctly, and if
the temperature of the chassis is in the nominal operating range, the fans slow down to their
normal operating speed.
The FAN OK LED on the fan assembly module is illuminated (green), indicating that all fans
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are operating properly. You should be able to feel air being taken in at the bottom front of the
chassis and being blown out at the top rear of the chassis.
If either the SINGLE-FAN-FAIL LED or the MULTIPLE-FAN-FAIL LED illuminates (yellow),
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see the "Troubleshooting" section on page
The Fail LED on each PRE module illuminates (yellow) briefly during the power-on sequence,
•
but then should turn off.
If the Fail LED does not turn off on either PRE, verify that the ejector levers are fully closed
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and that the captive screws have been tightened. If necessary, remove the PRE from the chassis
and reinsert it or replace it.
"Configuring the Cisco uBR10012 Router at Startup, page
63.
63.
40.
Cisco uBR10012 Series Universal Broadband Router–Quick Start Guide
Powering On the Cisco uBR10012 Router
58," to configure the line cards.
"Installing the AC Power
55