141 1543-Lza7016003uen.c. [PDF]

Zitiervorschau

Disconnected OPERATING INSTRUCTIONS

141/1543-LZA 701 6003 Uen C

Copyright © Ericsson AB 2009–2010. All rights reserved. No part of this document may be reproduced in any form without the written permission of the copyright owner. Disclaimer The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document. Trademark List All trademarks mentioned herein are the property of their respective owners. These are shown in the document Trademark Information.

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Contents

Contents 1

Overview

1

1.1

Description

1

1.2

Prerequisites

3

2

Procedure

4

2.1

Actions for DigitalCable or RfCable

4

2.2

Actions for EquipmentSupportFunction

8

2.3

Actions for FanGroup

8

2.4

Actions for HwUnit

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Disconnected

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Overview

1

Overview This instruction concerns alarm handling.

1.1

Description Disconnected is a primary alarm. The possible alarm causes and fault locations are explained in Table 1.

Table 1

Alarm Causes

Alarm Cause

Description

Fault Reason

Fault Location

Cable disconnec ted

This alarm is issued when an RBS internal cable has been disconnected. The alarm is issued by the following Managed Objects (MOs):

RBS internal cabl DigitalCable e disconnected RfCable

Impact Traffic is degraded or the cell is unable to carry any traffic.

• DigitalCa ble, for a digital cable between the Radio Unit (RU) and the Radio Unit Interface (RUIF) or between the RU and the Digital Unit WCDMA (DUW) • RfCable, for cables between the RUs

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Disconnected

Table 1

Alarm Causes

Alarm Cause

Description

Fault Reason

Fault Location

Impact

Equipment Malfunction

The alarm is raised when the secondary node has lost contact with the primary node. The secondary node is dependent on the primary node for support system control.

Secondary node has lost contact with primary node.

EquipmentSup portFunction

Climate control in the cabinet is not adapted to secondary node hardware unit needs. There is a risk of hardware unit overheating. The HW unit may provide reduced service or performance but there is no risk of hardware unit damage. The secondary node is not informed about when the RBS is running on batteries. External alarms that originate from ports on (1) SAU and/or (2) SCU are not possible to report from the secondary node.

This alarm is raised when a fan group that is expected to be present is disconnected.

Fan group is disconnected.

FanGroup

The climate system does not work properly. There is risk of equipment overheating within the RBS cabinet.

The alarm is raised if there is no contact with a hardware unit that is expected to be present in the RBS.

No contact with hardware unit.

HwUnit

2

The RBS is not able to communicate with or control the hardware unit. The hardware unit works in auto nomous mode which results in reduced performance. The actual performance 141/1543-LZA 701 6003degradation Uen C | 2010-02-24 depends on the type of hardware unit.

Overview

Table 1

Alarm Causes

(1) Support Alarm Unit (2) Support Control Unit

1.2

Prerequisites This section provides information on the documents, tools, and conditions that apply to the procedure.

1.2.1

Documents Ensure that the following documents have been read and understood: •

Personal Health and Safety Information

•

System Safety Information

•

Element Manager

•

Hardware Test Using Element Manager

Ensure that the following documents are available:

1.2.2

•

Restart Board

•

Lock Board

•

Unlock Board

•

Replacing Internal Supplementary Parts

Tools No tools are required.

1.2.3

Conditions Before starting this procedure, ensure that the following conditions are met: •

A work order or this instruction is referenced from another instruction.

•

The alarm is acknowledged in the RBS EM alarm list.

•

Access is available to other documentation referenced within this instruction.

•

Access to the site is secured, if required for on-site activities.

•

Access to the RBS EM is established.

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Disconnected

•

2

The alarm has not automatically been cleared by the system.

Procedure This section describes the procedure to follow when this alarm is received. Analyze the alarm details listed in Table 1 . Choose action depending on Managed Object: as follows:

2.1

•

DigitalCable or RfCable

•

EquipmentSupportFunction

•

FanGroup

•

HwUnit

Actions for DigitalCable or RfCable Activities to be Performed Remotely or On Site The following activities can be performed, either remotely or on site, using the RBS EM: •

Restarting boards and units

•

Performing a hardware test of the RU

Activities to be Performed On Site Only The following activities can only be performed manually on site: •

Control Base Unit (CBU)-based RBS:

0 0 0 •

Checking the digital cable Replacing an RU

Digital Unit (DU)-based RBS:

0

4

Checking RF cabling connections

Checking RF cabling connections

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Procedure

0 0 2.1.1

Checking the digital cable Replacing a DUW

Restarting Boards and Units Note:

The following steps can, depending on the configuration, temporarily take the cell out of traffic.

To restart a board or unit, perform the following steps: 1. Check the RBS EM alarm list to identify the cable for which the alarm is issued. The RBS EM alarm list Additional Text field identifies the board connectors for the faulty or incorrectly connected cable. 2. In the RBS EM, restart the boards and units connected to the cable for which the alarm is issued as instructed in Restart Board. 3. If the alarm does not cease, perform the following steps:

2.1.2

•

If the MO issuing the alarm is DigitalCable, go to Section 2.1.3 on page 6.

•

In all other cases, go to Section 2.1.2 on page 5.

Checking RF Cabling Connections To check RF cables, perform the following steps: 1. Lock the RU in the RBS EM. 2. Ensure that the RF cables and the connectors are correctly connected and undamaged. 3. If any faults are identified, reconnect the cable or replace the faulty cable. More information can be found in Antenna and RF Connections or RBS Configurations and Hardware Maintenance Instructions. 4. In the RBS EM, restart the RU. 5. Unlock the RU and check the RBS EM alarm list to see if the alarm ceases. Based on the results, perform the following actions: • Note:

If the alarm does not cease, lock the RU and replace the original undamaged cable. Contact the next level of maintenance support. Never return any cable to Ericsson unless the alarm has been cleared due to the replacement of this particular cable.

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2.1.3

Performing a Hardware Test of the RU To perform a hardware test of the RU, perform the following steps: 1. Perform a hardware test of the RU as instructed in Hardware Test Using Element Manager. 2. Check the results of the test. Based on the results, perform the following actions:

2.1.4

•

If the test results show no fault, go to Section 2.1.4 on page 6 or Section 2.1.5 on page 6.

•

If the test results show a fault, go to Section 2.1.6 on page 7 or Section 2.1.7 on page 7.

Checking the Digital Cable for CBU-based RBSs To check the digital cable for a CBU-based RBS, perform the following steps: 1. If applicable, in the RBS EM, lock the RU. 2. Ensure that the digital cable and the connectors are correctly connected and undamaged. 3. If any faults are identified, reconnect the cable or replace the faulty cable as instructed in Hardware Maintenance Instructions. 4. If applicable, unlock the RU and check the RBS EM alarm list to see if the alarm ceases. Based on the results, perform the following actions: •

If the alarm reappears, restart the RUIF.

•

If the alarm does not cease, lock the RU and replace the original undamaged digital cable, go to Section 2.1.6 on page 7.

Note:

2.1.5

Never return any digital cable to Ericsson unless the alarm has ceased due to the replacement of this particular digital cable.

Checking the Digital Cable for DU-based RBSs To check the digital cable for a DU-based RBS, perform the following steps: 1. If applicable, in the RBS EM, lock the RU. 2. Ensure that the digital cable and the connectors are correctly connected and undamaged. 3. If any faults are identified, reconnect the cable or replace the faulty cable as instructed in Hardware Maintenance Instructions.

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Procedure

4. If applicable, unlock the RU and check the RBS EM alarm list to see if the alarm ceases. Based on the results, perform the following actions: •

If the alarm reappears, restart the DUW.

•

If the alarm does not cease, lock the RU and replace the original undamaged digital cable, go to Section 2.1.7 on page 7.

Note:

2.1.6

Never return any digital cable to Ericsson unless the alarm has ceased due to the replacement of this particular digital cable.

Replacing the RU To replace the RU, perform the following steps: 1. In the RBS EM, lock the RU. 2. Replace the RU as instructed in Replacing Radio Units. 3. Unlock the RU and check the RBS EM alarm list to see if the alarm ceases. Based on the results, perform the following actions: •

If the alarm reappears, restart the RUIF.

•

If the alarm does not cease, lock the RU and replace the original RU. Contact the next level of maintenance support.

Note:

2.1.7

Never return any RU to Ericsson unless the alarm has ceased due to the replacement of this particular RU.

Replacing the DUW Note:

Before replacing the DUW, the RBS must be taken out of service.

To replace the unit, perform the following steps: 1. Replace the DUW as instructed in Replacing Digital Units. 2. Check the RBS EM alarm list to see if the alarm has ceased. 3. Based on the results, perform the following actions: •

If the alarm reappears, restart the DUW. Check the RBS EM alarm list to see if the alarm clears.

•

If the alarm does not cease, lock the DUW and replace the original DUW. Contact the next level of maintenance support.

Note:

Never return a DUW to Ericsson unless the alarm has ceased due to the replacement of this particular DUW.

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2.2

Actions for EquipmentSupportFunction To resolve the alarm, do the following: 1. Check that the secondary node Digital Unit (DU) and primary node DU are connected to the EC bus on correct hubPosition. 2. Check that secondary node and primary node are configured properly through attributes SupportSystemControl and hubPosition. 3. Restart the secondary node DU. 4. Restart the primary node DU. 5. Change the cable that connects the secondary node DU in this node to the EC bus. 6. Change the cable that connects the primary node DU in the other node to the EC bus. 7. Change the EC bus hub/SHU. 8. Check that the alarm has ceased. 9. If the alarm remains, put the original cables and EC bus back and consult the next level of maintenance support.

2.3

Actions for FanGroup To resolve the alarm, do the following: 1. Restart the System Control Unit/Support Part (SCU/SUP). See Restart Board for instructions. 2. Check that the alarm has ceased. 3. If the alarm remains, check that attribute climateSystem is correctly configured for this RBS and that the corresponding correct number of fan groups is installed in the RBS. 4. Check that the alarm has ceased. 5. If the alarm remains, Check that the fans are properly connected. 6. Check that the alarm has ceased. 7. If the alarm remains, consult the next level of maintenance support.

2.4

Actions for HwUnit 1. Check that the node is configured properly and that the hardware unit is present in this RBS node. Correct number of MO HwUnit with correct UnitType must be configured on the node.

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Procedure

2. Check that the alarm has ceased. 3. If the alarm remains, restart the hardware unit 4. Check that the alarm has ceased. 5. If the alarm remains, check that the hardware unit is properly connected to the EC bus or superior unit. 6. Check that the alarm has ceased. 7. If the alarm remains, change the cable that connects the hardware unit to the EC bus or superior unit. 8. Check that the alarm has ceased. 9. If the alarm remains, identify and lock the faulty unit. See Lock Board for instructions. 10. Change the faulty unit. See Replacing Internal Supplementary Parts for instructions. 11. Unlock the unit. See Unlock Board for instructions. 12. Check that the alarm has ceased. 13. If the alarm remains, change the EC bus hub/SHU 14. Check that the alarm has ceased. 15. If the alarm remains, put the original units back and consult the next level of maintenance support.

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