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CiscoASR 9000 Series Aggregation Services Router Hardware Installation Guide
Chapter4 Troubleshooting the Installation
Troubleshooting the Power Subsystem
•Power cords plugged into the power tray receptacles are secured in place with their retention clips.
•Power cords at the power source end are securely plugged into their own ACpower outlets.
•Source AC circuit breaker is switched on.
Step3 Check the power supply status LED indicators:
•Input power LED (green)—Indicates that the AC power input is operating normally, and the source
AC input voltage of 200 to 240VAC is within the nominal operating range.
If the input power LED is blinking, the input voltage is out of acceptable range. Verify that each AC
power source is operating in the nominal range of 200 to 240VAC.
Note On the DC power tray, the Power Input LED is lit solid green if both DC feeds are valid and
blinks green if only a single DC feed is valid.
•Output power LED (green)—Indicates that the DC power output is operating normally and the
–54 VDC output voltage to the backplane are within the nominal operating range. This indicator
lights only when the power switch at the rear of the power tray is set to the ON (1) position.
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If the Output power LED remains off after checking all the power sources, replace the power
supply with a spare. If the spare power module does not work, troubleshoot the power tray in
which the module is plugged.
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If the output power LED is blinking, the power module is in a power limit or overcurrent
condition. Make sure that each power cord is connected to a dedicated AC power source. Verify
that each AC power source is operating in the nominal range of 200 to 240VAC and is supplying
a minimum service of 20A, North America (or 13 A, international).
•Fault LED (red)—Indicates that the system has detected a fault within the power supply. This
indicator remains off during normal operation. If the fault LED is on:
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If your system has more than one power tray (CiscoASR 9010 Router,
Cisco ASR 9922 Router, and CiscoASR 9912 Router) with power modules installed for
redundancy, you can toggle the power switch at the rear of the first power tray off and then on.
If the fault LED remains on after several attempts to power it on, replace the power module with
a spare.
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If the spare power module also fails, the problem could be a faulty power tray backplane
connector. Power off the router and contact a Cisco service representative for assistance.
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Verify that the power module fans are operating properly.
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Verify that the fan tray is operating properly.
If the power module fans and the fan trays are operating properly, replace the existing power module
with a spare.
Caution Because the AC input power subsystems use redundant power modules, a problem with the DC output
voltage to the backplane from only one power module should not affect router operation. When the router
is equipped with two AC power supplies, it powers on and operates even if one power supply fails.
However, complete router functionality may be affected depending on the system load.