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5 • Troubleshooting and maintenance Model 3120 RAS Getting Started Guide
56 Introduction
Introduction
This chapter describes troubleshooting and fault analysis that can be performed by the operator. If you require
more help, refer to Chapter 6, “Contacting Patton for assistance”. Refer to table 4 for a list of common symp-
toms and suggested remedies.
Note The following information assumes that there is only one failure
involving the RAS and that if you perform the corrective action
listed, it will solve the problem. If you are unable to correct a failure,
refer to Chapter 6, “Contacting Patton for assistance”.
Table 4. Symptoms
Problem Corrective Action
POWER LED is extinguished Verify that power is being supplied to the RAS.
POWER LED is flashing One of the power supplies has malfunctioned. The RAS will function nor-
mally indefinitely with one power supply, so you can wait until a low traffic
time, then refer to “Replacing the RAS” on page 61 to replace the RAS.
CPU FAIL LED is lit CPU has failed. As soon as possible, unplug both power cables from the
RAS, wait 30 seconds, then plug the cables back into the RAS to see if the
problem disappears. If the CPU FAIL LED is still lit after the RAS completes
the power-up cycle, refer to “Replacing the RAS” on page 61 to replace the
RAS.
ALARM LED is lit Indicates that an alarm condition has been detected.
SYSTEM LED is extinguished The RAS is not functioning properly. As soon as possible, unplug both
power cables from the RAS, wait 30 seconds, then plug the cables back into
the RAS to see if the problem disappears. If the SYSTEM LED is still lit after
the RAS completes the power-up cycle, refer to “Replacing the RAS” on
page 61 to replace the RAS.
10/100 ETHERNET A yellow LED is
extinguished
• A valid link has not been detected. Verify that the cable is plugged
into the hub, switch, or workstation and the RAS.
• Verify that the hub, switch, or workstation is powered on.
• Replace the cable. If the problem still exists, refer to “Replacing the
RAS” on page 61 to replace the RAS. If the problem still exists, trou-
bleshoot the hub, switch, or workstation.
10/100 ETHERNET B yellow LED is
extinguished
• A valid link has not been detected. Verify that the cable is plugged
into the hub, switch, or workstation and the RAS.
• Verify that the hub, switch, or workstation is powered on.
• Replace the cable. If the problem still exists, refer to “Replacing the
RAS” on page 61 to replace the RAS. If the problem still exists, trou-
bleshoot the hub, switch, or workstation.