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Cisco AS5800 Blower Assembly Installation and Replacement

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Cisco AS5800 Universal Access Server Blower Assembly Installation and Replacement
Document Contents
If You Need More Information
Cisco AS5800 Universal Access Server Overview
Blower Assembly Overview
Safety Guidelines
Removing and Replacing the Blower Assembly
Cisco Connection Online

Cisco AS5800 Universal Access Server Blower Assembly Installation and Replacement


Product Number: DS58-FAN=

The Cisco AS5800 Universal Access Server is equipped with a blower assembly, which is designed to monitor system internal operating temperatures and maintain acceptable cooling parameters.

This document explains how to remove and replace the blower assembly. Also included are instructions for verification and troubleshooting.


Note      Use this document in conjunction with the Cisco AS5800 Universal Access Server Hardware Installation and Configuration Guide and Cisco AS5800 Universal Access Server Regulatory Compliance and Safety Information document that shipped with your Cisco 5814 dial shelf.


Document Contents

The following sections are included in this document:

If You Need More Information

For information regarding the Cisco AS5800 Universal Access Server that is beyond the scope of this document or for additional information, use the following resources:

  • For Cisco AS5800 Universal Access Server hardware installation and maintenance information, refer to the Cisco AS5800 Universal Access Server Hardware Installation and Configuration Guide (Document Number DOC-AS5800-HICG=) that shipped with your system.
  • For Cisco AS5800 Universal Access Server software installation and configuration, refer to the Cisco AS5800 Universal Access Server Software Installation and Configuration Guide (Document Number DOC-AS5800-SICG=) that shipped with your system.
  • For international agency compliance, safety, and statutory information for wide-area network (WAN) interfaces for the Cisco AS5800 Universal Access Server, refer to the document Cisco AS5800 Universal Access Server Regulatory Compliance and Safety Information (Part Number 78-4666-xx) that shipped with your system.
  • To obtain general information about documentation, refer to the section "Cisco Connection Online," or call customer service at 800 553-6387, or 408 526-7208. Customer service hours are 5:00 a.m. to 6:00 p.m., Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can also send e-mail to cs-rep@cisco.com, or you can refer to the Cisco Information Packet that shipped with your system.
  • Cisco Documentation CD-ROM package

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly; therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback on the toolbar, and then select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

  • For additional Cisco IOS software information, refer to the following modular configuration and modular command reference publications, as appropriate for your configuration:
    • Configuration Fundamentals Configuration Guide
    • Configuration Fundamentals Command Reference
    • Dial Solutions Configuration Guide
    • Wide-Area Networking Configuration Guide
    • Wide-Area Networking Command Reference
    • Network Protocols Configuration Guide
    • Network Protocols Command Reference
    • Configuration Builder Getting Started Guide
    • Troubleshooting Internetworking Systems
    • Debug Command Reference
    • System Error Messages
    • Cisco IOS Software Command Summary
    • Cisco Management Information Base (MIB) User Quick Reference

Cisco AS5800 Universal Access Server Overview

The Cisco AS5800 Universal Access Server is a high-density, ISDN and modem WAN aggregation system that provides both digital and analog call termination. It is intended to be used in service provider dial point-of-presence (POP), or centralized enterprise dial environments. The Cisco AS5800 Universal Access Server chassis components include a Cisco 5814 dial shelf and a Cisco 7206 router shelf. An optional AC power shelf is also available.

The dial shelf and router shelf are bundled, and can be ordered to support either AC or DC power. Included in the dial shelf is a blower assembly, filter module, and power entry modules (PEMs). Also included in the bundled system are ingress trunk cards, modem cards, dial shelf controller cards, Flash memory PCMCIA cards, cables, and Cisco IOS software. The dial shelf feature cards and host router shelf communicate via a dial shelf interconnect cable.

Figure 1 shows a front view of a fully configured Cisco AS5800 Universal Access Server, and Figure 2 shows a rear view.


Figure 1   Cisco AS5800 Universal Access Server—Front View



Figure 2   Cisco AS5800 Universal Access Server—Rear View


Blower Assembly Overview

The blower assembly in the Cisco 5814 dial shelf, monitors the dial shelf internal operating temperatures and maintains acceptable cooling parameters. The blower assembly contains three variable-speed impeller fans and a controller card that performs the following functions:

  • Monitors internal temperatures

The controller card contains temperature sensors, which monitor internal air temperature within the dial shelf chassis. These temperature sensors, along with other system maintenance sensors, can detect areas exceeding the temperature set point.

  • Controls fan operation

Fan speed is controlled by a microprocessor on the controller card. If air temperature within the dial shelf chassis exceeds acceptable operating range, the controller card increases the fan speed in an attempt to control the temperature. If temperatures continue to rise, the controller card linearly increases fan speed until the fans reach full speed. If acceptable operating temperatures are still unobtainable, the system environmental monitor shuts down all internal power, thus preventing equipment damage from excessive heat.

During normal operation, the three fans "load-share" to provide cooling. If one of the three fans fails, a warning message displays on your console screen. The controller card then increases the speed of the remaining operative fans to maintain acceptable temperature levels.

When all three fans are operating normally, fan speed is 1600 rpm. As ambient air temperature increases, fan speed increases accordingly. Thus, if one of the fans becomes inoperative, the remaining fans will increase fan speed to 2400 rpm.

  • Supports online insertion and removal (OIR)

The blower assembly supports online insertion and removal (OIR), which means you can remove and replace the blower assembly while the system is operating; system operation will not be affected. However, if you expect the replacement process to exceed one minute, we recommend that you shut down the system. Normal blower assembly replacement is estimated not to exceed 30 seconds.

The blower assembly is located directly above the feature cards and dial shelf controller cards in the dial shelf. You install the blower assembly into the front of the dial shelf chassis where it plugs directly into the dial shelf backplane. Figure 3 shows the location of the blower assembly in a fully configured Cisco 5814 dial shelf, as viewed from the system front.


Figure 3   Cisco 5814 Dial Shelf with Blower Assembly Installed—Front View


LED Indicators

Two LEDs—Power and Fault—are mounted on the blower assembly front panel (see Figure 4) and function as follows:

  • Power LED—During normal operation, the green power LED should light, which indicates that all three fans are operating normally. If the power LED is off, either the blower assembly is not powered on, or a fault has been detected in the blower assembly.
  • Fault LED—During normal operation, the yellow fault LED should remain off. If the fault LED is on, a failure of one or more fans is indicated. This failure could be a complete shutdown of one or more fans in the blower assembly, or it could mean that the blower assembly control card has detected that the speed of one or more fans has exceeded tolerance levels.

Figure 4   Blower Assembly—Front View


Specifications

Table 1 lists blower assembly DC power requirements.

Table 1  

Power Specification

Voltage to backplane

Maximum
Nominal
Minimum

-38 VDC
-48 VDC
-75 VDC

Current

Minimum (SS)
Nominal (SS)
Maximum (SS)
Peak (2 sec)

3.0A
42.0A
54.0A
60.0A

Blower Assembly—DC Power Requirements

Table 2 lists the blower assembly environmental specifications, which are designed to meet NEC, NEBS, and ETSI requirements.

Table 2  

Specification Description

Cooling

Maximum inlet air temperature is 131° F (55° C)

Audible noise

Maximum acoustic noise level is 60 dBa

Temperature

Operating
Nonoperating

23° F to 131° F (-5° C to 55° C)
-13° F to 158° F (-25° C to +70° C)

Humidity

Operating
Nonoperating

10% to 90%, noncondensing
10% to 95%, noncondensing

Altitude

Operating
Nonoperating

9,843 ft (3,000 meters) at 104° F (40° C)
15,000 ft (4,570 meters) over allowable temperature range

Thermal shock

Operating
Nonoperating

23° F to 113° F at 32.9° F (-5° C to 45° C at 0.5°  C) per minute
-13° F to 158° F (-25° C to 70° C) with changeover time between 2 and 3 minutes

Vibration

Operating
Nonoperating

1.12 Grms from 3 to 500 Hz
2 Grms from 3 to 500 Hz

Regulatory compliance

ENG-5769
UL 1950
CSA 22.2-950-936
EN 60 950
BABT
AUSTEL
IEC-801
Bellcore NEBS TR-NWT-000063
Bellcore NEBS TR-NWT-001089

Blower Assembly—Environmental Specifications

Safety Guidelines

The following safety guidelines are recommended when working with any equipment that connects to electrical power or telephone wiring:

  • Locate the emergency power-off switch for the room in which you are working before beginning any procedures requiring access to the chassis interior.
  • Never work alone when potentially hazardous conditions exist.
  • Never assume that power has been disconnected from a circuit; always check.
  • Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
  • Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

Telephone Wiring Guidelines

The following guidelines are recommended when working with any equipment that is connected to telephone wiring or to other network cabling:

  • Never install telephone wiring during a lightning storm.
  • Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
  • Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.
  • Always use caution when installing or modifying telephone lines.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damages equipment and impairs electrical circuitry. ESD occurs when printed circuit boards are improperly handled, and results in complete or intermittent failures.

The system feature cards and dial shelf controller cards consist of a printed circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding, connectors, and a handle are integral components of the carrier. Handle the system line cards by their carrier edges and handle only; never touch the printed circuit board components or connector pins.

Although the metal carrier helps to protect the printed circuit boards from ESD, wear a preventive antistatic strap whenever handling the dial shelf feature cards or dial shelf controller cards, or the router shelf network processing engine, I/O controller, or port adapters. Ensure that the strap makes good skin contact and connect the strap's clip to an unpainted chassis surface to safely channel unwanted ESD voltages to ground.

If no wrist strap is available, ground yourself by touching the metal part of the chassis.

The following guidelines are recommended to prevent ESD damage:

  • Always use an ESD wrist strap or ankle strap when installing or replacing system components. Ensure that the ESD strap makes contact with your skin.
  • Handle all system components by their metal carrier edges and handles only; avoid touching the printed circuit board components or any connector pins.
  • Place all system components that have been removed on an antistatic surface with the printed circuit board components facing upward, or in a static shielding bag. If you are returning system components to the factory, immediately place them in static shielding bags.


Caution   Periodically check the resistance value of the antistatic strap. The measurement should be within the range of 1 and 10 megohms.


Warning   When installing the unit, the ground connection must always be made first and disconnected last.

Safety Warnings

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each warning statement.


Warning   This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.

Waarschuwing  Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.

Varoitus  Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention  Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.

Warnung  Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.

Avvertenza  Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.

Advarsel  Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

Aviso  Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.

¡Advertencia!  Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

Varning!  Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.

Removing and Replacing the Blower Assembly

This section lists tools and parts you need, and explains how to remove and replace the blower assembly in the dial shelf chassis.

Tools and Parts Required

You need the following parts and tools to remove and replace the blower assembly. If you need additional equipment, contact a service representative for ordering information.

  • A new blower assembly (DS58-FAN=)
  • 1/4-inch flat-blade screwdriver
  • ESD-preventive wrist strap

Ensuring Easy System Access

If your Cisco AS5800 Universal Access Server is installed in a standard 19-inch, 4-post or standard telco rack, cables from other equipment in the rack might obstruct access to the system rear. The rack power strips or other permanent fixtures might also cause obstruction.

Use the following guidelines to ensure easy system access when the system is installed in a rack:

  • Allow at least 24 inches (61.0 cm) of clearance to the system front and rear.
  • Carefully gather any cables from other equipment in the rack and use cable ties to anchor them away from the system rear.

Removing the Blower Assembly


Caution   The system will shut down two minutes after the system temperature threshold has been reached. Although normal blower assembly replacement is estimated not to exceed 30 seconds, if you expect the replacement process to exceed one minute, we recommend that you shut down the system prior to the removal and replacement process.


Caution   The blower assembly weighs 27.5 lb (12.5 kg). Use two hands when removing or replacing the blower assembly.

To remove the blower assembly, complete the following steps:


Step 1   Attach an ESD-preventive wrist strap between you and an unpainted chassis surface.

Step 2   Loosen the two captive screws on the blower assembly front panel. (See Figure 5.)

Step 3   Grasp the blower assembly handle with one hand and pull the blower assembly straight toward you about half way out of the slot.

Step 4   Place your other hand under the blower assembly as it extends from the dial shelf chassis to support the blower and prevent it from falling.

Step 5   Slowly pull the blower assembly all the way out of the slot and place it on an antistatic mat or in packaging to return it to the factory.


Figure 5   Blower Assembly Removal and Replacement


This completes the blower assembly removal process. Proceed to the section "Replacing the Blower Assembly."

Replacing the Blower Assembly

To replace the blower assembly in the dial shelf, complete the following steps. Refer to Figure 5 to orient yourself with the dial shelf chassis and the blower assembly. When you are finished, use a Site Log sheet to record service maintenance.


Caution   The blower assembly weighs 27.5 lb (12.5 kg). Use two hands when removing or replacing the blower assembly.


Step 1   Attach an ESD-preventive wrist strap between you and an unpainted chassis surface.

Step 2   Place one hand on the blower assembly handle and place your other hand under the blower assembly to support the weight.

Step 3   Position the blower assembly in the opening and slide it fully into the chassis until the backplane connectors mate.


Note All electrical connections are fully operative when the backplane connectors mate. The blower assembly will immediately power up if the system is powered on.


Step 4   Using a 1/4-inch flat-blade screwdriver, tighten the two captive screws on the blower assembly front panel.

Step 5   Note service maintenance on your Site Log sheet.

This completes the blower assembly installation procedure. Proceed to the section "Verifying and Troubleshooting the Installation" to verify your installation.

Verifying and Troubleshooting the Installation

To verify that the blower assembly is properly installed and operational, complete the following steps:


Step 1   Listen to verify the fans are operative. In noisy environments, you might want to place your hand to the rear of the blower assembly and feel for air flow from the exhaust vent.

Step 2   Verify the green power LED on the blower assembly front panel lights.

If the power LED remains off, verify the blower assembly is fully installed in the dial shelf and the connector is firmly connected to the backplane; verify the captive screws are adequately tightened.

Step 3   Verify the yellow fault LED on the blower assembly front panel remains off.

If the fault LED lights, 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 the blower assembly is faulty. Install another blower assembly and return the faulty blower assembly to the factory.

This completes troubleshooting the blower assembly. If you have any questions or need assistance, proceed to the section "Cisco Connection Online."

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional content and services.

Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously—a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.


Note      If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.