Cisco Systems 7401ASR manual Fan Failures, With dual 48V DC power supplies installed

Chapter 3 Starting and Configuring

Functional Overview

+2.50 V measured at +2.47 V

+3.30 V measured at +3.28 V

+5.00 V measured at +4.98 V

+5.20 V measured at +5.18 V

+12.25 V measured at +12.36 V

-12.00 V measured at -12.15 V

Fans:

Fan 1 is believed to be working

Fan 2 is believed to be working

Fan 3 is believed to be working

Fan 4 is believed to be working

Fan 5 is believed to be working

With dual 48V DC power supplies installed:

Router# show environment all

Power Supplies:

Power supply 1 is Redundant 48VDC Power Supply. Unit is on.

Power supply 2 is empty.

Temperature readings:
chassis inlet		measured	at 34C/93F
chassis outlet		measured	at 28C/82F
Voltage readings:
+1.8 V (PXF)		measured at	+1.79	V
+1.8 V (CPU)		measured at	+1.77	V
+2.50	V	measured at	+2.47	V
+3.30	V	measured at	+3.28	V
+5.00	V	measured at	+4.98	V
+5.20	V	measured at	+5.18	V
+12.25 V		measured at	+12.26 V
-12.00 V		measured at	-12.15 V

Fans:

Fan 1 is believed to be working

Fan 2 is believed to be working

Fan 3 is believed to be working

Fan 4 is believed to be working

Fan 5 is believed to be working

Fan Failures

When the system power is on, all five fans should be operational. The system continues to operate if a fan fails. When a fan fails, the system displays the following message:

router: 00:03:46:%ENVM-3-BLOWER:Fan 2 may have failed

If the air temperature exceeds a defined threshold, the system controller displays warning messages on the console terminal, and if the temperature exceeds the shutdown threshold, the system controller shuts down the system.

If the system does shut down because the temperature exceeded the shutdown threshold, the system displays the following message on the console screen and in the environment display when the system restarts:

Queued messages:

%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown

Cisco 7401ASR Installation and Configuration Guide

3-8 OL-5419-01 B0