Cisco XR 12410 - Manual (Page 144)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Power Subsystem
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Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
Troubleshooting the Power Distribution System
The power distribution system consists of:
• AC or DC PEMs which supply –48 VDC to the backplane,
• The chassis backplane which carries voltage to chassis components.
• DC-to-DC converters which convert –48 VDC from the backplane to the
correct voltages required by the line cards.
Use the following procedure to troubleshoot the power distribution system.
Step 1 Check each power supply to make sure that:
• The ejector lever is fully closed and properly secured by the its captive screw.
• The Pwr OK indicator is on.
• The Fault and Temp indicators are both off.
If the power supplies meet the above criteria, then the correct source power is
present and within tolerance. The power supplies are functioning properly.
Step 2 Make sure the blower module is operating.
• If the blower module is functioning, then the –48 VDC from the chassis
backplane and the cables from the backplane to the blower module are
functioning properly.
• If the blower module is not functioning, there may be a problem with either
the blower module itself, or the –48 VDC power supplied to the blower
module. Eject and reseat the blower module.
• If the blower module is still not operating there could be a problem with the
blower module controller card or cable. Replace the blower module.
• Contact your Cisco representative if replacing the blower module does not fix
the problem.