Additional Power Subsystem Troubleshooting Information; Obtaining Temperature And Environmental Information - Cisco ASR 9000 Series Installation Manual

Troubleshooting the Installation
• Fault LED (red)—Indicates that the system has detected a fault within the power supply. This indicator
Caution

Additional Power Subsystem Troubleshooting Information

This section contains additional troubleshooting information to help you isolate the cause of a power problem.

Obtaining Temperature and Environmental Information

If both the RSP/RP and fan trays are operating, all internal correct DC voltages are present.
Enter the show environment command at the router admin prompt to display temperature and voltage
information for each installed card, fan tray, and power module as shown in this example:
RP/0/RSP0/CPU0:router(admin) #show environment
Temperature Information
---------------------------------------------
R/S/I Modules Inlet Hotspot
Temperature Temperature
(deg C) (deg C)
0/RSP0/*
host 25.3 41.6
0/0/*
host 29.2 30.0
0/1/*
• If the output power LED is blinking, the power module is in a power limit or overcurrent condition.
Make sure that each power cable is connected to a dedicated DC power source. Verify that each
DC power source is operating in the nominal range of –40 to –72 VDC.
remains off during normal operation. If the fault LED is on, check the following:
• If your system has more than one power tray (Cisco ASR 9010 Router, Cisco ASR 9922 Router,
and Cisco ASR 9912 Router) with power modules installed for redundancy, you can toggle the
power switch at the rear of the first power tray off and then on. If the fault LED is still on, eject and
reseat the power module. If the fault LED remains on after several attempts to power it on, replace
the power module with a spare.
• If the spare power module also fails, the problem could be a faulty power tray backplane connector.
Power off the router and contact a Cisco service representative for assistance.
• Verify that the power module fans are operating properly.
• Verify that the fan tray is operating properly.
• If the power module fans and the fan trays are operating properly, replace the faulty power module
with a spare.
Because there are redundant power modules, a problem with the DC output voltage to the backplane
from only one power module should not affect router operation. When the router is equipped with
two DC power supplies, it powers on even if one power supply fails. However, complete router
functionality may be affected depending on the system load.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
Additional Power Subsystem Troubleshooting Information
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