Troubleshooting The Dc Pem Installation - Cisco 12416 Installation And Configuration Manual

Removing and Replacing a DC PEM

Troubleshooting the DC PEM Installation

Step 1
Step 2
Step 3
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
7-66
Use the following procedure to troubleshoot the DC PEM if it is not operating
properly after installation.
Make sure the PEM is seated properly:
Eject and reseat the PEM.
•
The captive screw on the ejector lever are tightened securely.
•
The power switch is in the on (1) position (2400 W only).
•
Make sure the router is powered on and that all power cords are connected
properly:
All power cables are securely connected to their terminal studs on the back
•
panel.
Each pair of PEM 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.
–
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. During normal operation, this
indicator remains off.
Check that the source voltage is within the correct range: –40 to –72
–
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.
Chapter 7 Maintaining the Router
OL-11495-01