Troubleshooting The Processor Subsystem - Cisco 7000 Series Hardware Installation And Maintenance Manual

— If yes, the +24 VDC line to the fan tray is good, but there might be a problem with the
— If no, there is a problem with the fan tray or the +24 VDC power. Ensure that the DC OK
— If no and the DC OK LED is on, ensure that the fan tray is seated properly. Refer to the
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Do the system and the fans start up but shut down after about two minutes?
— If you have changed the configuration register boot field jumper settings or altered the
— The following message, if displayed, indicates that the system has detected an
If you are still unable to resolve the problem, contact a service representative for further instructions.

Troubleshooting the Processor Subsystem

The processor subsystem comprises the RP, SP (or SSP), and interface processors. The RP and SP
(or SSP) are required system components; the system cannot operate unless both the RP and SP (or
SSP) are installed properly. However, because the CxBus interface processors support OIR, the
system can operate without any interface processors installed as long as none are in partial contact
with the backplane pins; an interface processor that is partially connected to the backplane will send
software or an individual fan.
LED is on. If the LED is off, there could be a problem with the +24 VDC supply to the fan
tray. Refer to the section "Troubleshooting the Power Subsystem."
section "Replacing the Fan Tray" in the chapter "Maintenance" to remove and reseat the fan
tray. Ensure that the fan control board edge connector is inserted fully in the backplane
socket. After you replace the chassis cover panel, try starting the system again.
configuration file boot instructions, the system could be booting a software image (earlier
than Software Release 9.17[6]) that does not recognize the signals from the fan control board
(and therefore assumes that the cooling subsystem is not operating).
Use the show version command to display the current software version and ensure that the
currently running software image is Software Release 9.17(6) or later. You will have to enter
this command quickly after the system boot is complete and before the system reaches the
two-minute shutdown timeout.
The following message, if displayed, indicates that one or more fans has failed or is operating
out of tolerance.
%ENVM-2-FAN: Fan array has failed, shutdown in 2 minutes
If one or more fans or the fan control board fails, you must replace the fan tray.
overtemperature condition or out-of-tolerance power inside the chassis.
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown
If an environmental shutdown results from an out-of-tolerance power condition, the DC OK
LED will go off before the system shuts down. (Refer to the section "Troubleshooting the
Power Subsystem.") Although an overtemperature condition is unlikely at initial startup,
ensure that heated exhaust air from other equipment is not entering the inlet vents, and that
there is sufficient clearance around the sides of the chassis to allow cooling air to flow. Refer
to the guidelines in the chapter "Preparing for Installation" for acceptable site configurations.
This 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 chapter "Product Overview" for
detailed descriptions.)
Troubleshooting the Processor Subsystem
Troubleshooting the Installation 4-7