Network Card User Manual

Troubleshooting the Cooling Subsystems
Cisco AS5800 Universal Access Server Hardware Installation Guide5-10
Dial Shelf Cooling Subsystem
In the dial shelf, check the following to help isolate a problem with the cooling system:
• Do the blower assembly fans operate?
To determine whether the dial shelf fans are operating, listen for them. In noisy environments,
place your hand under the exhaust vents on the back of the dial shelf blower assembly to feel for
air being forced out the vents.
— If no, there is a problem with the dial shelf fans or there is a problem with the power to the
blower assembly.
If you determine that the power supply is functioning normally but a fan is faulty, you can
replace the blower assembly without powering off the access server. Refer to the blower
assembly removal instructions in Chapter 2, “Preparing for Installation,”and the reinsertion
instructions in Chapter 3, “Installing the Cisco AS5800.” For problems with the system
power, refer to the section “Troubleshooting the Power Subsystem” in this chapter.
• Is the green power LED on the blower assembly front panel on?
If no, verify that the blower assembly is fully installed in the dial shelf, the connector is firmly
connected to the backplane, and the captive screws are tightened adequately.
• Is the yellow fault LED on the blower assembly front panel on?
If yes, the newly installed blower assembly might be faulty or the chassis connector might be
damaged. Shut off system power, remove the blower assembly from the dial shelf, and check the
connectors. If the connectors are in good condition, reinstall the blower assembly in the dial shelf
and power ON the system. If the fault LED is still on, assume that the blower assembly is faulty.
Install another blower assembly and return the faulty blower assembly to the factory.
• The following error message, if displayed on the router shelf console, indicates that the system
has detected an overtemperature condition or out-of-tolerance power somewhere in the system.
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown
If an environmental shutdown results from an out-of-tolerance power condition, the router shelf
power OK LED remains off and the system shuts down. (Refer to the section “Troubleshooting
the Power Subsystems” in this chapter.) Although an overtemperature condition is unlikely at
initial startup, ensure that heated exhaust air from other equipment is not entering the router’s
inlet vent and that there is sufficient clearance around the sides of the chassis to allow cooling air
to flow. Refer to the “Preventive Site Configuration: Maintaining Normal Operation” section on
page 2-20” for preventive site configurations.
The above message could also indicate a faulty component or temperature sensor. Before the
system shuts down, use the show environment or show environment table command to display
the internal chassis environment. Refer to the Cisco 7206 Installation and Configuration Guide
for a description of show commands.