Bridge/Router Installation and Configuration Guide

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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
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Chapter 5 Troubleshooting the Installation
Troubleshooting the Power Subsystem
• TEMP (yellow)—Indicates that the PEM is in an overtemperature condition
causing a shut-down to occur.
Note If the temp indicator is on, the fault indicator also goes on.
– Verify that the power supply fan is operating properly.
– Verify that the blower modules are operating properly.
– If the power supply fan and the blower modules are operating properly,
replace the existing PEM with a spare.
• TEMP (flashing yellow—2400 W PEM only)—Indicates that a power supply
fan is locked or malfunctioning.
Note If the temp indicator is flashing, the fault indicator is also on.
– Check to see if the fan is operating. Remove any obstructions to the fan.
– If the fan is not operational, replace the power supply.
• OC (2400 W PEM only) (steady, or flashing yellow after 10
seconds)—Indicates the output current of the power supply has exceeded its
limit and that an overload or short circuit has occurred.
Note If the OC indicator is on or flashing, the fault indicator also goes on.
– Remove and then apply power to the power supply by disconnecting its
power cord.
– If the indicator remains on, try reseating the power supply.
– If the indicator remains on, replace the power supply.
Because there are redundant power supplies, a problem with the DC output
voltage to the backplane from only one PEM should not affect router operation.
Because the router is equipped with multiple DC power supplies, it powers on and
operates even if one power supply fails.