Cisco XR 12404 Installation Manual page 106

Troubleshooting an AC Power Subsystem
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If the AC power source wiring appears to be okay, but the power supply
OUTPUT OK LED remains off, go to Step 3.
Plug the power cord into a different, but compatible AC outlet.
Step 3
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Exchange the existing power cord for another power cord.
Step 4
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If a spare power supply is available, replace the existing module with the spare
Step 5
and restart the system.
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Is the power supply INPUT OK LED on?
Step 6
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Note
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Cisco XR 12404 Router Installation Guide
4-8
Verify that each power supply in the router is attached to a separate AC power
source.
If the router is connected to an uninterruptable power supply (UPS), verify
that the UPS is functioning correctly. Note that there might be a UPS for each
power supply in the system.
If the power supply OUTPUT OK LED is on, the original AC outlet is faulty
and cannot be used. Notify the appropriate facilities personnel and go to
Step 6.
If the power supply OUTPUT OK LED remains off, go to Step 4.
If the power supply OUTPUT OK LED is on, the original power cord is faulty
and must be replaced. The AC portion of the power supply is working
normally, go to Step 6.
If the OUTPUT OK LED still fails light when connected to a different power
source with a new power cord, the power supply is probably faulty. Go to
Step 5.
If the OUTPUT OK LED on the spare power supply is on, the power supply
is working normally, go to Step 6. The original power supply is faulty and
should be returned for replacement.
If yes, the power supply is functioning normally.
In a Cisco XR 12406 router with two power supplies, the output power
from the second power supply is adequate to maintain router operation.
If no, and there is no other system activity (fan assembly is off; line cards are
not powered), the power supply is faulty. Replace the power supply.
Chapter 4 Troubleshooting the Installation
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