Cisco Systems MWR 1900 manual Troubleshooting the Power and Cooling Systems

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Appendix A Troubleshooting

Problem Solving

Troubleshooting the Power and Cooling Systems

Both the power LED and the fans can help you troubleshoot a power problem. Check the following items to help isolate the problem:

Check the following items to help isolate problems with the power supply installation:

•With the MWR 1900 router connected to the power source, is the power LED on the front panel on?

–If not, check the DC input, DC source, and the power supply wiring.

–Check the power supply connection to the motherboard.

–If the power LED is still off, the problem might be a power supply failure.

•Does the router shut down after being on a short time?

–Check the fans. If the fans are not working, the router will overheat and shut itself down.

–If the fans are not working, check the power supply connections to the fans.

–Ensure that the chassis intake and exhaust vents are clear.

Check the environmental site requirements in the “System Specifications” section on page 1-6.

•Does the router partially boot, but the LEDs do not go on?

–Check for a power supply failure by inspecting the power LED on the front panel of the router. If the power LED is on, the power supply is functional.

–If the power LED is not on, refer to the Cisco Information Packet for warranty information or contact customer service.

Environmental Reporting Features

The MWR 1900 router has a temperature sensor to detect over-temperature conditions inside the chassis. The over-temperature detection trips at 75°C +/- 5%. This condition is reported to the processor as an interrupt and software then takes action on this interrupt to generate the appropriate alarming. If the router reaches a temperature of 90°C, the power supply will cycle to prevent the box from exceeding that temperature in a powered up state.

If the router is operating at an abnormally high temperature, you see the following message on the console screen:

%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling problem immediately!

Some causes of abnormally high router temperature are:

•Fan failure

•Air conditioner failure in the room

•Air blockage to cooling vents

Take steps to correct the problem. For information about environmental operating conditions, see “System Specifications” section on page 1-6.

Cisco MWR 1900 Mobile Wireless Edge Router Hardware Installation Guide

 

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Contents Corporate Headquarters Customer Order Number DOC-7813982= Text Part NumberCopyright 2002 Cisco Systems, Inc All rights reserved Hardware Features Preparing to Install the RouterSafety Recommendations Safety with Electricity Obtaining DocumentationWhat to Do After Installing the Hardware Problem SolvingConsole Port Connections Console PortObjectives AudienceOrganization Chapter Title DescriptionConventions Convention DescriptionMääräysten noudattaminen ja tietoa turvallisuudesta WarnungAvvertenza Questo dispositivoWorld Wide Web Obtaining Documentation¡Advertencia Varning Obtaining Technical Assistance Ordering DocumentationDocumentation Feedback Cisco.comTechnical Assistance Center Contacting TAC by Using the Cisco TAC WebsiteContacting TAC by Telephone Overview of the Cisco MWR 1900 Router Primary Use of the MWRHardware Features MWR 1900 in an IP-RAN SolutionFront Panel of the Cisco MWR 1900 Router Fast Ethernet Interfaces Voice/WAN Interface CardsSpecification Overview of Cisco MWR 1900 Power SuppliesCompact Flash Environmental Monitoring Temperature Sensor System SpecificationsDescription Specification Regulatory CompliancePreparing to Install the Router Safety RecommendationsSafety with Electricity General Site Requirements Inspecting the Router Creating a Site LogInstallation Checklist Task Verified by DateConsole Port Connections Console and Auxiliary Port ConsiderationsAuxiliary Port Connections Installing the Router Rack Mounting the ChassisConnecting the Console Terminal and Modem Installing the Router in the RackInstalling a T1/E1 Multiflex Vwic Attaching the BracketsIdentifying a Rollover Cable Console PortConnecting the FE Interface Cables Connecting the Network CablesAuxiliary Port Connecting the Vwic Interface Cables Pin DescriptionCable Specifications PinConnecting the MWR 1900 Router to a DC-Input Power Supply Required Tools and EquipmentGrounding the Router Wiring the DC-Input Power Source Powering On the RouterReplacing or Upgrading the CF Installing a CF Memory Card in an External Slot Removing a CF Memory Card from an External SlotFormatting Procedures for CF Memory Cards File and Directory ProceduresFormatting CF Memory as a DOS File System Copy FilesDisplay the Contents of a CF Card Display Geometry and Format InformationDelete Files from Flash Rename a File in FlashDisplay File Content Create a New DirectoryRemove a Directory What to Do After Installing the HardwareEnter a Directory and Determine the Current Directory Troubleshooting Problem SolvingTroubleshooting the Power and Cooling Systems Environmental Reporting FeaturesTroubleshooting Modules, Cables, and Connections Reading the LEDsColor Status Carrier detect GColor Description Page Numerics IN-2 IN-3 IN-4
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