Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual page 258

Removing and Replacing an AC-Input Power Supply
Step 2
Step 3
If the power supply fails to operate properly after several attempts to power it up, contact a
service representative for assistance.
7-18 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Verify that the Cisco 12012 powers up correctly. Visually check that the green
AC OK LED on the power supply faceplate is on: This indicates that the source
AC voltage is within the range of 180 to 264 VAC.
If the AC OK LED is off, check for the following:
•
Verify that the source AC circuit breaker is on.
•
Verify that the AC power cord is firmly connected from the source AC circuit
breaker to the power supply.
•
Check that the power supply power switch in the ON (|) position.
Visually check that the red output fail LED flashes on and off for five seconds,
then goes off.
•
If the output fail LED goes on and stays on, move the power supply to
another bay if possible and turn the power switch ON (|). If the LEDs go on
properly when the power supply is installed in another bay, suspect a faulty
backplane connector in the power supply in which it was originally installed.
If the output fail LED goes on and stays on when the power supply is
installed in a second bay, suspect a power supply failure or an adverse
environmental condition (for example, the power supply has detected an
overvoltage or overtemperature condition and has shut down).
•
If the output fail LED goes on only on one power supply, assume that the
power supply or AC source (for that power supply) is faulty.
•
If the output fail LED goes on and stays on, on multiple power supplies
connected to separate AC sources, suspect that an overvoltage or possibly an
overtemperature condition has occurred in the power supply bay causing the
power supplies to fail.