Troubleshooting the Cooling Subsystems
Cisco AS5800 Universal Access Server Hardware Installation Guide5-10
In the dial shelf, ch eck the following to he lp isolate a problem with the cooling syst em:
•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 blo wer asse mbly 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 instruct ions in Chapter2, “Preparing for Installation,”and the reinsertion
instructions in Chapter 3, “Installing the CiscoAS5800.” 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 bl o wer ass embly f rom the dial she lf, and check the
connectors. If the connectors are in good condition, rein stall th e blower assembly in the dial shelf
and power ON the sy stem. If the fault L ED is still on, assu me that the blower as sembly 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 overtempera t ure condition or out-of-toler ance power somewhere in the sy stem.
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown
If an environmental shutdown results from a n 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 e quipm ent is not entering the router’s
inlet vent and that there is suff icie nt cl earanc e aro und the side s of t he ch assis to a llow cooling air
to flow. Refer to the “Preventive Site Configuration: Maintaining Normal Ope r ation” section on
page2-20” for preventive site configurations.
The above message could also indicate a faulty component or temperature sensor. Before the
system shuts dow n, u se th e show environment or show environment table command to display
the internal chassis envi ronment. Refer to the Cisco 7206 Installation and Configuration Guide
for a description of show commands.