Cisco XR 12406 Installation Manual page 138

Troubleshooting an AC Power Subsystem
Check the AC power source.
Step 2
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Note
If the AC power source appears to be okay, but the power supply AC 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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Cisco XR 12406 Router Installation Guide
4-8
Check the AC power cord from the power source to the router.
– Verify that the power cord is seated securely in the PDU and the AC
outlet.
Verify that the power cord is not worn or damaged. If the insulation
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appears cracked or broken, or the plugs appear loose, replace the power
cord with a new power cord.
Make sure that the AC power source circuit breaker is on and has not tripped,
and that the circuit breaker has the proper current rating.
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.
There may be a UPS for each power supply in the system.
If the power supply AC LED goes 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 AC LED remains off, go to Step 4.
If the power supply AC LED goes on, the original power cord is faulty and
must be replaced. After replacing the power cord, go to Step 6.
If the AC LED still fails to go on when connected to a different power source
with a new power cord, the power supply is probably faulty. Go to Step 5.
If the AC LED on the spare power supply goes on, the original power supply
is faulty and should be returned for replacement. Go to Step 6.
Chapter 4 Troubleshooting the Installation
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