Cisco 12416 Installation And Configuration Manual page 243

Chapter 5 Troubleshooting the Installation
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Because both the standard and optional AC-input power subsystems use
redundant power supplies, a problem with the DC output voltage to the backplane
from only one power supply should not affect router operation. Because the router
is equipped with multiple AC power supplies, it powers on and operates even if
one power supply fails.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
TEMP (flashing yellow—2500 W PEM only)—Indicates that a power supply
fan is locked or malfunctioning.
If the temp indicator is flashing, the fault indicator also goes on.
Note
Check to see if the fan is operating. Remove any obstructions to the fan.
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If the fan is not operating, replace the power supply.
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ILIM (yellow—2000 W PEM only)—Indicates the power supply is operating
in a current-limiting condition.
Make sure that each power cord is connected to a dedicated AC power
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source.
– Each AC power supply operating in the nominal range of 200 to 240 VAC
requires a minimum service of 20 A, North America (or 13 A,
international).
OC (2500 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 has occurred.
If the OC indicator is on or flashing, the fault indicator also goes on.
Note
Remove and then apply power to the power supply by disconnecting its
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power cord.
If the indicator remains on, try reseating the power supply.
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– If the indicator remains on, replace the power supply.
Troubleshooting the Power Subsystem
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