Cisco 12416 Installation And Configuration Manual page 250

Troubleshooting the Power Subsystem
Use the following procedure to troubleshoot the power distribution system.
Check each power supply to make sure that:
Step 1
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Make sure the blower modules are operating.
Step 2
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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
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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.
The ILIM is off (2000W AC only)
The OC indicator is off (2500 W AC and 2400 W DC only)
If the power supplies meet the above criteria, then the correct source power
is present and within tolerance. The power supplies are functioning properly.
If the blower modules are functioning, then the –48 VDC from the chassis
backplane and the cables from the backplane to the blower modules are
functioning properly.
If a 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 a 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.
Chapter 5 Troubleshooting the Installation
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