Troubleshooting the Power Subsystems
Cisco AS5800 Universal Access Server Hardware Installation Guide5-8
Router Shelf Power Subsystem
In the router shelf, check the following to help isolate a problem with the power subsys tem:
•Is the power OK LED on?
—If yes, the power source is good and the power supply is functional.
—If no, verify that the power cable is connected at both ends.
If the power OK LED remains off and the power swit ch is set correctly, suspect the power
source or the power cable. Power OF F the system , c onnect the po wer c able to anothe r po wer
source, if available, then power ON the system. I f the LED lights, th e problem is the first
power source.
—If the power OK LED does not light after you connect the power supply to a new power
source, replace the power cord, then power ON the system. If the AC power (or input power)
LED lights, return the first power cable for replacement.
—If the LED still does not light when the power supply is connected to a different power source
with a new power cable, the power supply is probably faulty. If a second power supply is
available, install it in the other power supply bay and contact a service representative for
further instructions.
•Is the power OK LED on for the second (redundant) power supply?
—If yes, proceed to the section “Troubleshooting the Cooling Subsystems.”
—If no, repeat each of the above procedures for the second power supply.
If you are unable to resolve the problem or you determine that either a power supply or chassis
connector is faulty, contact a service representative for inst ructions.
Dial Shelf Power Subsystem
In the dial shelf, check the following to help isolate a problem with the power subsystem:
•Is the first PEM power OK LED on?
—If yes, the power source is good and the PEM is functional. Verify that the second PEM
power LED is on for power redundancy.
—If no, verify that the power cable is connected at both ends and check that yo u have wired the
DC-input connections correctly.
If the DC-input connection is wired correctly, the miswire LED remains off.
If the miswire LED is on, the two DC conductors entering the PEM terminal block are
reversed. Power OFF the power at your power source and reverse the connections.
—If neither the power nor the miswire LED is on, check the vo ltage at t he input te rminal block.
If the voltage reading falls between –40 V DC and –60 VDC, replace the PEM.
•If you are using the AC-input power shelf, are both power OK LEDs on?
—If yes, the power source is good and both power supplies are functional.
—If no, verify that the associated AC power cord is plugged in and the correct A C volt age (200
to 240 VAC) is p resent at the source.
—Verify that the fault LED is off.
If a power supply fault LED lights, the power shelf has detected an internal f ault; the power
supply is defective. You need to replace the power supply.