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Chapter 5 Troubleshooting the Installation
Troubleshooting the Power Subsystem
5-12
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Use the following procedure to troubleshoot the DC PEM if it is not operating
properly after installation.
Step 1
Make sure the PEM is seated properly:
•
Eject and reseat the PEM. Make sure:
–
The captive screw on the ejector lever are tightened securely.
–
The power switch is in the on (1) position (2400 W only).
Step 2
Make sure the router is powered on and that all power cords are connected
properly. Check that:
•
Power cables are securely connected to their terminal studs on the back panel.
•
Power cables are connected to a dedicated 60 A DC service.
•
The source DC circuit breaker is switched on.
•
The PEM circuit breaker is switched on (2000 W only).
–
If circuit breaker does not stay switched on, replace the PEM.
Step 3
Check the PEM status indicators:
•
PWR OK (green) — Indicates that the PEM is operating normally, and the
source DC voltage is within the nominal operating range of –48 to –60 VDC.
This indicator should light when the PEM circuit breaker is switched on.
•
FAULT (yellow) — Indicates that the system has detected a fault within the
PEM or the incoming voltage is too low. This indicator remains off during
normal operation.
–
Check that the source voltage is within the correct range: –40.5 to
–75 VDC.
–
Toggle the PEM circuit breaker off and then on. If the indicator remains
on after several attempts to power it on, replace the existing PEM with a
spare.
–
If the spare PEM also fails, the problem could be a faulty power shelf
backplane connector. Power off the router and contact a Cisco service
representative for assistance.
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