Nokia LTE Maintaining

(1)

LTE Radio Access,

Rel. FDD-LTE 15A,

Operating Documentation,

Issue 02

Maintaining Flexi Multiradio

Base Station and Flexi

Multiradio 10 Base Station

Hardware

DN09182513

Issue 02

Approval Date 2015-06-17

(2)

This document is intended for use by Nokia Solutions and Networks' customers ("You") only, and it may not be used except for the purposes defined in the agreement between You and Nokia Solutions and Networks ("Agreement") under which this document is distributed. No part of this document may be used, copied, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Solutions and Networks. If you have not entered into an Agreement applicable to the Product, or if that Agreement has expired or has been terminated, You may not use this document in any manner and You are obliged to return it to Nokia Solutions and Networks and destroy or delete any copies thereof.

The document has been prepared to be used by professional and properly trained personnel, and You assume full responsibility when using it. Nokia Solutions and Networks welcome Your comments as part of the process of continuous development and improvement of the documentation.

This document and its contents are provided as a convenience to You. Any information or statements concerning the suitability, capacity, fitness for purpose or performance of the Product are given solely on an "as is" and "as available" basis in this document, and Nokia Solutions and Networks reserves the right to change any such information and statements without notice. Nokia Solutions and Networks has made all reasonable efforts to ensure that the content of this document is adequate and free of material errors and omissions, and Nokia Solutions and Networks will correct errors that You identify in this document. But, Nokia Solutions and Networks' total liability for any errors in the document is strictly limited to the correction of such error(s). Nokia Solutions and Networks does not warrant that the use of the software in the Product will be uninterrupted or error-free.

NO WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF AVAILABILITY, ACCURACY, RELIABILITY, TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, IS MADE IN RELATION TO THE CONTENT OF THIS DOCUMENT. IN NO EVENT WILL NOKIA SOLUTIONS AND NETWORKS BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY OR DATA THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION IN IT, EVEN IN THE CASE OF ERRORS IN OR OMISSIONS FROM THIS DOCUMENT OR ITS CONTENT.

This document is Nokia Solutions and Networks' proprietary and confidential information, which may not be distributed or disclosed to any third parties without the prior written consent of Nokia Solutions and Networks.

Nokia is a registered trademark of Nokia Corporation. Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only.

Important Notice on Product Safety

This product may present safety risks due to laser, electricity, heat, and other sources of danger.

Only trained and qualified personnel may install, operate, maintain or otherwise handle this product and only after having carefully read the safety information applicable to this product.

The safety information is provided in the Safety Information section in the "Legal, Safety and Environmental Information" part of this document or documentation set.

Nokia Solutions and Networks is continually striving to reduce the adverse environmental effects of its products and services. We would like to encourage you as our customers and users to join us in working towards a cleaner, safer environment. Please recycle product packaging and follow the recommendations for power use and proper disposal of our products and their components.

If you should have questions regarding our Environmental Policy or any of the environmental services we offer, please contact us at Nokia Solutions and Networks for any additional information.

(3)

1 2 3 3.1 3.2 3.3 3.4 Summary of changes... 6

Performing routine maintenance tasks...7

Checking the FCOA door or roof locks... 12

Painting Flexi Multiradio BTS hardware... 13

Introduction to painting Flexi Multiradio BTS hardware...13

Preparing Flexi Multiradio BTS hardware for painting...13

Repair painting... 14

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Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

LMP port IP cap not reinstalled after maintenance...8 Connector IP boot correctly installed firmly in place...9 Connector IP boot incorrectly installed (IP seals not firmly in place on any edge)...9 Connector IP boot incorrectly installed (not pushed all the way in).... 10 Cable installed without IP boot... 10

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Table 3 Table 4 Table 5

Recommended paints for repair painting...15 Teknos recommendations for spraying...15 Akzo Nobel recommendations for spraying...16

(6)

Summary of changes

Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

This document is common for all Radio Access Technologies (RAT). You may find here information about solutions that are not available or supported in a specific SW release or RAT. Table RAT releases covered by the document lists all SW releases covered by the content of this document. For features supported in your SW release, see respective feature documentation chapter in the system library.

Table 1 Releases covered by the document

Product Release

GSM/EDGE (BSS) RG30 (BSS), RG40 (BSS)

WCDMA RAN RU40, RU50, RU50 EP1, WCDMA 16 Long Term Evolution RL50, RL60, RL70, FDD LTE15A TD LTE RL35TD, RL45TD, RL55TD, TD LTE15A

Changes between issue 01A (2015-02-06) and issue 02 (2015-06-17)

•

Document title edited.

•

Information about Release 4 RRH plastic covers added to chapter Introduction to

painting Flexi Multiradio BTS hardware.

Changes between issue 01 (2014-09-16) and issue 01A (2015-02-06)

•

FMSA and FMSB information has been removed because of hardware phase out.

•

A note has been added to Introduction to painting Flexi Multiradio BTS hardware.

•

Chapter Performing routine maintenance tasks has been modified.

First issue of the document

Maintaining Flexi Multiradio Base Station Hardware has been created as a merger of two

different, technology-specific documents:

•

Maintaining Flexi Multiradio BTS WCDMA Hardware

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1 Performing routine maintenance tasks

Follow this procedure during routine site visits to ensure that the base station remains in a good condition.

Purpose

The Flexi BTS design itself is maintenance-free and therefore has no specified regular maintenance intervals.

1 Check whether the maintenance straps inside the module covers are damaged. Make sure there are no visual defects. Replace worn or damaged maintenance straps.

2 Check the fans and air circulation.

For modules with fans, keep the fans free of leaves and debris. When cleaning the fans, first remove the power connector from the fan or disable power to the module (depending on the variant). For all modules, keep air inlets and outlets free of obstructions to maintain proper air circulation and prevent overheating of the BTS. Keep the BTS environment clean of dust.

3 Check the connector seals.

Check the connector seals visually. Replace worn or broken seals.

4 Make sure that all connector IP seals, plugs and boots are connected correctly.

•

The LMP port or any unpopulated connector openings have IP protection

(8)

Figure 1 LMP IP plug installed

Figure 2 LMP port IP cap not reinstalled after maintenance

(9)

Figure 3 Connector IP boot correctly installed firmly in place

Figure 4 Connector IP boot incorrectly installed (IP seals not firmly in place on any edge)

(10)

Figure 5 Connector IP boot incorrectly installed (not pushed all the way in)

•

Ensure that cables and connectors are fitted with IP boots.

(11)

5 Check the antenna line and transmission cable connectors.

6 Check the module fixing screws.

Check the tightness of the module fixing screws. For RRH, also check the tightness of the solar shield fixing screws. Tighten all loose screws and replace all damaged or missing screws

(12)

2 Checking the FCOA door or roof locks

Purpose

Check the Flexi Cabinet for Outdoor (FCOA) door or roof locks during site visits.

1 Lubricate the door or roof locks if required.

Any oil (aerosol) not including graphite, silicon or teflon can be used for lubricating the locks.

2 If the outdoor cabinet is operating in temperatures below 0°C (32°F), lubricate each lock with a light, non-freezing spray lubricant.

3 Apply lubricating oil to moving parts of the lock assembly, and within the lock cylinder by applying oil to the key and inserting it in the cylinder repeatedly.

(13)

3.1 Introduction to painting Flexi Multiradio BTS

hardware

The original paint for Flexi Multiradio BTS hardware is a polyester powder coating. Repainting, which is done with liquid paint, and renewal of polyester powder coating is primarily needed in the following cases:

•

Change of color is desired.

•

The surface has become dirty and/or lost its original color.

•

Painted surfaces have been damaged.

NOTICE: Spraying is allowed only for a de-energized BTS.

Repair painting is not needed for reliability or corrosion resistance reasons.

Do not perform repair painting on plastic parts as the parts have been dyed throughout.

RRH optimum performance is guaranteed when the RRH solar shield or plastic cover is in standard color.

Risk of personal injury. Plastic cover is always required on Release 4 RRH during indoor and outdoor operation for IEC/UL 60950-1 safety compliance.

3.2 Preparing Flexi Multiradio BTS hardware for

painting

All areas to be painted have to be thoroughly cleaned of grease and dirt beforehand. Washing with an emulgating washing agent or thinner is recommended. Also, all general detergents that do not contain acids or strong alkalic agents may be used. Organic solvents such as aromatic agents, glycol, ketone, ester, and halogen hydrocarbon should be avoided. Check the paint manufacturer's instructions for temperatures of detergents and surfaces.

To improve the adhesion of new paint, grind the entire area to be painted by sanding or with a piece of steel wool.

All areas that are not meant to be painted have to be carefully protected. In principle, only originally painted areas are allowed to be painted over.

When the painting method is spraying, all air inlets and outlets must be covered. For Remote Radio Heads, IP seals must be in place during the painting and replaced with new ones afterwards.

Thickness of the original paint is typically 70 µm at the minimum, and therefore priming is not required for repair painting.

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3.3 Repair painting

Repair painting is not needed for reliability or corrosion resistance reasons.

Do not perform repair painting on plastic parts as the parts have been dyed throughout.

In general, the polyester powder coatings are robust with all common paint types. Ideal adhesion and weatherproofness are obtained with the recommended paint types (two- component polyurethane or two-component acrylic paint), and thorough cleaning and painting procedure according to this instruction.

Small repairs can be done with spray bottles, however, due to a greater amount of diluent the adhesion is not ideal. Small repairs can also be done with a paint brush or a piece of foam plastic. That method makes it possible to achieve a surface that looks like original structured coating.

If larger areas or exterior of the cabinet are desired to be painted, using an airless HVLP (high volume with low pressure) or conventional air pressure sprayer is recommended. They will provide very good adhesion and even covering with the recommended paints. Special attention must then be paid to protecting of all areas that are not meant to be painted.

Recommended colors and paints are presented in the following tables.

The outer metal parts of Flexi Multiradio BTS hardware are originally painted with

polyester powder paint. Original color codes are listed in Table 2: Original colors of Flexi Multiradio BTS hardware.

Table 2 Original colors of Flexi Multiradio BTS hardware

Description

Light gray cabinets FCIA

Gray cabinets FCIA

Color code (Natural Color System) NCS S 1502-R NCS S 4502-R Nearest Munsell code H = 9,5R, V = 8,2 C = 0,5 H = 8,5RP, V = 5,9 and C = 0,5 Remote Radio Heads RAL 70471) _-

Dark gray cabinets RAL 7012 -FCOA,

Plastics parts, FCOS

Gloss is within the range of 7 - 13% according to ISO 2813, 60° providing a matt finish.

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Table 3 Recommended paints for repair painting

Base Paint type Hardener Diluent

paint/Manufacturer

- TEKNODUR two-component TEKNODUR 100 TEKNODUR 190/Teknos Winter Oy polyurethane SOLV,

TEKNOSOLV 9521 or TEKNOSOLV 9526 Mixing ratio 4 parts - 1 part 10-20% by volume:

- Akzo Nobel Sikkens two-component Autocryl Hardener 1.2.3 Thinner Autocryl/Akzo Nobel acrylic paint MS20, MS30, Fast Coatings BV MS40, MS50 or

MS60

Mixing ratio 10 parts - 5 parts 1 part by volume:

Table 4 Teknos recommendations for spraying

Paint: TEKNODUR 190 Notes

Airless sprayer 0.011- 0.013" Do not use universal diluent or thinner, since they may

•

Nozzle size Dilution Diluent 10 - 20% TEKNODUR SOLV

contain alcohol which will react with the hardener.

Conventional spray 1.4 - 1.8 mm

•

Nozzle size Dilution Thinner Viscosity, DIN 4 20 - 30% TEKNODUR SOLV 18 - 30 s

Application conditions +5°C (+41°F) Best results at room temperature.

•

Temperature (min.) below 80%

•

Relative humidity Film thickness

Theoretical spreading rate

40 µm 12.5 m2_/l

--

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Table 5 Akzo Nobel recommendations for spraying

Paint: Akzo Nobel Sikkens Notes

Autocryl

HVLP spray gun top feed 1.3 - 1.6 mm -

•

Nozzle size Spraying pressure Dilution Diluent max 0.7 bar 5 - 7.5 % 1.2.3 Thinner Fast

HVLP spray gun bottom feed 1.5 - 1.7 mm -

•

Nozzle size Spraying pressure Dilution Diluent max 0.7 bar 5 - 7.5 % 1.2.3 Thinner Fast

Conventional spray top feed 1.2 - 1.5 mm/3 - 4 bar -

•

Nozzle size/pressure 5 - 7.5 %

•

Dilution 1.2.3 Thinner Fast

•

Thinner

Conventional spray bottom feed 1.4- 1.6 mm/3 - 4 bar -

•

Nozzle size/pressure 5 - 7.5 %

•

Dilution 1.2.3 Thinner Fast

•

Thinner

Viscosity, DIN Cup 4 (at +20°C 16 - 17 s -(+68°F))

Application conditions +10°C (+50°F) +20°C (+68°F) optimum

•

Temperature (min.) below 80% 50% optimum

•

Relative humidity Film thickness

Theoretical spreading rate

50 µm 18 m2_/l

--

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3.4 Recoating

Recoating can be done when it is necessary to replace the original color with a different one, for example, when required by the premise owner. Using the same paint types (with a suitable color) for recoating as for repair painting is recommended. The following must be taken into account when painting:

•

Flexi units must be removed from the cabinet or casing before painting.

•

Elastomeric parts (such as cable entries) must be masked during the painting process.

•

Grounding points must be masked and not painted over.

•

When painting a Remote Radio Head, the IP seals must be in place and replaced after the painting.

•

Gore vents must be masked.

•

For recoating plastic parts, use suitable paints for the used material. See the recycling marking for material details.

•

Painting of any plastic parts must be performed in a clean indoor environment only (for example, in a car paintshop).

•

Do not paint the cables.

•

Black color should be avoided in cases where the BTS can be located in direct sunlight.

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LTE Radio Access, Rel. FDD-

LTE 15A, Operating

Documentation, Issue 02

Replacing Flexi Multiradio

Base Station Units

DN09182525

Issue 04A

Approval Date 2015-09-22

(19)

be used except for the purposes defined in the agreement between You and Nokia Solutions and Networks ("Agreement") under which this document is distributed. No part of this document may be used, copied, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Solutions and Networks. If you have not entered into an Agreement applicable to the Product, or if that Agreement has expired or has been terminated, You may not use this document in any manner and You are obliged to return it to Nokia Solutions and Networks and destroy or delete any copies thereof.

The document has been prepared to be used by professional and properly trained personnel, and You assume full responsibility when using it. Nokia Solutions and Networks welcome Your comments as part of the process of continuous development and improvement of the documentation.

This document and its contents are provided as a convenience to You. Any information or statements concerning the suitability, capacity, fitness for purpose or performance of the Product are given solely on an "as is" and "as available" basis in this document, and Nokia Solutions and Networks reserves the right to change any such information and statements without notice. Nokia Solutions and Networks has made all reasonable efforts to ensure that the content of this document is adequate and free of material errors and omissions, and Nokia Solutions and Networks will correct errors that You identify in this document. But, Nokia Solutions and Networks' total liability for any errors in the document is strictly limited to the correction of such error(s). Nokia Solutions and Networks does not warrant that the use of the software in the Product will be uninterrupted or error-free.

NO WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF AVAILABILITY, ACCURACY, RELIABILITY, TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, IS MADE IN RELATION TO THE CONTENT OF THIS DOCUMENT. IN NO EVENT WILL NOKIA SOLUTIONS AND NETWORKS BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY OR DATA THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION IN IT, EVEN IN THE CASE OF ERRORS IN OR OMISSIONS FROM THIS DOCUMENT OR ITS CONTENT.

This document is Nokia Solutions and Networks' proprietary and confidential information, which may not be distributed or disclosed to any third parties without the prior written consent of Nokia Solutions and Networks.

Nokia is a registered trademark of Nokia Corporation. Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only.

f

Important Notice on Product Safety

This product may present safety risks due to laser, electricity, heat, and other sources of danger.

Only trained and qualified personnel may install, operate, maintain or otherwise handle this product and only after having carefully read the safety information applicable to this product.

The safety information is provided in the Safety Information section in the "Legal, Safety and Environmental Information" part of this document or documentation set.

Nokia Solutions and Networks is continually striving to reduce the adverse environmental effects of its products and services. We would like to encourage you as our customers and users to join us in working towards a cleaner, safer environment. Please recycle product packaging and follow the recommendations for power use and proper disposal of our products and their components.

If you should have questions regarding our Environmental Policy or any of the environmental services we offer, please contact us at Nokia Solutions and Networks for any additional information.

(20)

1 2 2.1 2.2 2.3 2.4 2.5 3 3.1 3.1.1 3.1.2 3.1.2.1 3.1.2.2 3.2 3.3 3.4 3.5 3.6 3.6.1 3.6.2 4 5 6 7 8 9 9.1 9.2 9.3 9.4 10 Summary of changes... 9 Disconnecting cables... 10

Replacing module fans...13

Replacing module fans from the back...13

Replacing module fans from the front... 14

Replacing sheet metal fan carrier... 18

Replacing plastic fan carrier...23

Replacing module fans for RF Module (FXxx) ... 29

Replacing modules...44

Replacing RF Module...44

Replacing faulty RF Module... 44

Replacing Single and Dual RF Modules with 3-sector RF Module.. 47 Replacing Single and Dual RF Modules with Flexi Multiradio RF Module FRGT...47

Reusing Flexi 3U Casing + FMCA (Front and Back Cover)... 50

Replacing System Module... 51

Replacing transmission sub-module... 55

Replacing Flexi Power Distribution and Fuses (FPFx) Submodule. 59 Replacing Flexi Power Module (FPMA)... 66

Replacing FPMA power sub-modules...68

Replacing AC/DC sub-module (FPAA)...68

Replacing battery sub-module (FPBA/FPBB)... 70

Replacing Remote Radio Head (RRH)... 72

Replacing RRH solar shield or plastic cover... 76

Replacing Flexi System External Alarm Module (FSEB)... 78

Replacing Flexi System External OVP FSES with FSEP...79

HW replacement/upgrade... 92

Returning faulty units... 93

Packing in a spare unit package... 94

Extra shipping package...94

Loading into a container...95

Loading onto a pallet...96

Torque values...98

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11.4

... 103 Flexi Power DC/DC Module (FPDA) LED indications... 105

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Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36

Disconnecting power cable... 11 Disconnecting the Ethernet cable... 11 Disconnecting the optical transceiver... 12 Replacing module fan from the back... 13 Removing module core...15 Removing fan plate sub-assembly... 16 Installing new fan plate sub-assembly...17 Re-installing module core... 17 Position of the fan connector and screws...30 Remove the screws... 31 Pull the fan plate out...31 Removing the fan connector in 60 W RF Module...32 Removing the fan connector in 80 W RF Module...32 Remove the fan assembly... 33 Position of the fan connector and screws...34 Remove the screws... 34 Pull the fan plate out...35 Removing the fan connector in 60 W RF Module...36 Removing the fan connector in 80 W RF Module...36 Remove the fan assembly... 37 Aligning the arrows and connecting the fan connector in 60 W RFM... 38

Aligning the arrows and connecting the fan connector in 80 W RFM... 38

Slide the new fan assembly...39 Proper Alignment of guide holes... 39 Aligning the arrows and connecting the fan connector in 60 W RFM... 41

Aligning the arrows and connecting the fan connector in 80 W RFM... 41

Slide the new fan assembly...42 Proper Alignment of guide holes... 42 Replacing RF Module... 45 DC cable...48 Optical port... 49 FRGT...50 FMCA A.206 front cover welding points... 50 Regular file with end size 5 mm x 20 mm...51 Each ultrasonic welding point loosened separately...51

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Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Figure 75

Removing the cable tie from DC power cable tie point...61 Disconnecting DC power cable... 61 Loosening FPFx screws from System Module... 62 Removing FPFx submodule... 62 Location of the FCM-FPF connection card...63 Fixing FPFx submodule to System Module... 63 Connecting DC power cable...64 Fixing DC power cable... 64 Connecting and fixing the cable to fan carrier... 65 Inserting System Module into casing...65 Installing the System Module casing front cover... 66 Changing the FPAA fan airflow direction (AcBel)... 69 Changing the FPAA fan airflow direction (Efore)... 70 Securing RRH with lifting hook... 73 Disconnecting the cables on the module...74 RRH solar shield...76 Disconnecting FSES cabling... 79 Installing FSEP enclosure... 80 Connecting FSEP grounding cable to plinth...81 Removing 3-pole DC IP boot...82 Wrapping tape around shielded DC cable... 82 Wrapping extra tape around DC cable... 83 Inserting DC power cable to IP boot...83 Removing narrow end of IP boot... 84 Properly secured shielded DC cable (left) and non-shielded DC cable (right)... 85 Connecting DC feeder cable wires... 85 Fixing IP boot screw... 86 Example of conduit usage... 87 Fixing DC feeder cable to cable entry... 88 Connecting 2-pole DC interface... 89 Connecting FSEP alarm cable... 90 Two versions of "ATTENTION!!!" warning labels and their Chinese translations... 93 "Delivery box" label allows shipping without extra package... 93 Use spare part packaging to return faulty units... 94 Correct procedure for packing the shipping box...95

(24)

Figure 79 Figure 80

Flexi Power Module AC/DC sub-module (FPAA) LED... 104 Flexi Power Battery sub-module (FPBA/FPBB) LED... 105

(25)

Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9

System Module LEDs (from left to right)...99 RF Module unit status LED indications...101 RRH unit status LED indications... 102 2x40 W RRH TX Status LED...103 Flexi Power Module AC/DC sub-module (FPAA) LED indications... 104 Flexi Power Battery sub-module (FPBA/FPBB) LED indications... 105 Flexi Power DC/DC Module (FPDA) LED indications...106

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Summary of changes

Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

This document is common for all Radio Access Technologies (RAT). You may find here information about solutions that are not available or supported in a specific SW release or RAT. Table RAT releases covered by the document lists all SW releases covered by the content of this document. For features supported in your SW release, see respective feature documentation chapter in the system library.

Table 1 RAT releases covered by the document

Product Release

GSM/EDGE (BSS) RG30 (BSS), RG40 (BSS)

WCDMA RAN RU40, RU50, RU50 EP1, WCDMA 16 Long Term Evolution RL50, RL60, RL70, FDD LTE15A

Changes between issues 04 (2015-07-21) and 04A (2015-09-22)

New chapter:

Replacing Flexi System External OVP FSES with FSEP

Changes between issues 03 (2015-06-17) and 04 (2015-07-21)

Updated chapters:

Replacing System Module

•

Notice on replacing Extension System Module updated.

Changes between issues 02 (2015-02-06) and 03 (2015-06-17)

Updated chapters:

Replacing Single and Dual RF Modules with 3-sector RF Module

•

Entire chapter updated.

Replacing RRH solar shield or plastic cover

•

Information about plastic covers added.

(27)

1 Disconnecting cables

Purpose

Disconnecting cables might be needed when, for example, changing configurations, recommissioning or replacing modules.

NOTICE: Optical fibre cables are fragile. Be careful when disconnecting any cables.

1 Remove any cable ties.

2 Detach the cable connector seal from the module mechanics.

Grip the connector seal by the stiffened end of the seal (the end connected to the connector) as shown in the Figure Detaching the cable connector seal.

Figure 1 Detaching the cable connector seal

3 To ease pulling out the connector seal, drop a dribble of water on the cable (on the edge of the seal).

4 Hold the cable with one hand and pull the seal backwards with your other hand so that the connector is exposed.

(28)

5 If you are disconnecting an optical cable or a power cable, push the locking clips all the way down and hold the clips. Then pull the connector out carefully. See Figure Disconnecting power cable for details.

Figure 2 Disconnecting power cable

6

If the locking clip is hard to push down, push the connector slightly toward the module, and then push the clip down.

The optical cable has a locking clip on the top of the connector, and the power cable has locking clips on either side of the connector.

If you are disconnecting the Ethernet cable, simultaneously push the locking clip all the way down and pull back.

(29)

7 If you are disconnecting an optical transceiver, first turn the locking ring into a horizontal position and then pull the optical transceiver out.

(30)

2 Replacing module fans

2.1 Replacing module fans from the back

Purpose

If a module fan fails, it must be replaced with a new one. Replacing the fan from the back of the module requires a back access and a minimum of 200 mm (7.87 in) maintenance space behind the BTS (for stacks larger than 6U, 500 mm (19.69 in.) with side access). If there is not enough space for replacing the fans from the back, the fans can also be

replaced from the front. See section Replacing module fans from the front in this

document for more detailed instructions.

These instructions show how to replace the module fans if you have a sheet metal fan

carrier. If you have a plastic fan carrier, see section Replacing plastic fan carrier in this

document.

Before you start

CAUTION! Risk of personal injury.

Do not touch the fans.

NOTICE: The modules might be damaged if operated for a long time in the upper

ambient temperature range. Replace a faulty unit as soon as possible.

Summary

(31)

1 Shut down the module, if necessary.

It is also possible to replace the fans during operation. Shutting down is the recommended option.

2 Connect the ESD wrist strap to your wrist and then to the plinth.

3 Detach the module back cover.

Check whether the maintenance strap inside the cover is damaged. Make sure there are no visual defects. Replace worn or damaged maintenance straps.

4 Disconnect the fan cables.

5 Detach the screws and the fan plate from the module core.

6 Remove the fan plate.

7 Install the new fan plate and connect the fan cable.

Make sure that the IP sealing is in place.

8 Reinstall the module back cover.

2.2 Replacing module fans from the front

Purpose

If a module fan fails, it must be replaced with a new one. Modules can be replaced from the front of the base station by pulling out the module core. The module core can be pulled out without dismounting the module stack.

These instructions show how to replace the module fans if you have a sheet metal fan carrier. If you have a plastic fan carrier, see section Replacing plastic fan carrier in this document.

NOTICE:

The modules might be damaged if operated for a long time in the upper ambient temperature range. Replace a faulty unit as soon as possible.

NOTICE:

The fans might break if the module core rests on the fans when it is out of the casing. Do not rest the core on the fans.

(32)

Check whether the maintenance straps inside the module covers are damaged when opening the covers for maintenance purposes. Make sure there are no visual defects. Replace worn or damaged maintenance straps.

1 If you are replacing an RF Module fan, see Replacing RF Module for instructions how to remove the module core from the casing.

2 If you are replacing a System Module fan, see Replacing System Module for instructions how to remove the module core from the casing.

3 Disconnect the module front panel cables.

(33)

4 Loosen the cable entry screws and remove the cable entries.

5 Detach module fixing screws.

6 Pull out the module core from the casing.

Figure 7 Removing fan plate sub-assembly

7

(34)

8 Remove the fan plate sub-assembly from the fan carrier.

9 Install the new fan plate sub-assembly to the fan carrier.

Figure 8 Installing new fan plate sub-assembly

10

9

DN70555217

10 Connect the fan cable.

Make sure that the IP sealing is properly in place.

11 Insert the core in the module casing.

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12 Fix the core to the casing with screws.

Tighten the screws to 5 Nm (3.69 ft lbs).

13 Install cable entries.

14 Connect the cables to the module front panel.

15 Reroute and coil up the cabling.

16 Turn the power back on.

Make sure that the LED is lit, and that the fan is rotating and nothing is obstructing it.

2.3 Replacing sheet metal fan carrier

Purpose

The fan carrier must be replaced when it is damaged.

The cables located between RF Module filter and power amplifier must never be disconnected. Make sure not to damage those cables while performing the replacement procedure.

1

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2 Remove the fan plate sub-assembly from the fan carrier.

3 Cut the cable ties holding the fan cable and detach the connector.

3

4 Detach the connection sink from the fan carrier.

Press the two latches on the top of the connection sink and pull upwards.

(37)

5 Rotate the connection sink slightly and pull it out.

5

6 Detach the fan carrier screws (4 x M4) and the fan carrier from the module core.

6

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7 Install the fan carrier to the module core.

Fix with four M4 screws. Tighten to 2.2 Nm (1.62 ft lbs).

7

8 Install the connection sink to the new fan carrier.

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9 Connect the connector and fix with a cable tie.

9

10 Install the new fan plate sub-assembly to the fan carrier.

Fix with four M5 screws. Tighten to 3.0 Nm (2.21 ft lbs).

11 10

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2.4 Replacing plastic fan carrier

Purpose

The fan carrier must be replaced when it is damaged.

The cables located between RF Module filter and power amplifier must never be disconnected. Make sure not to damage those cables while performing the replacement procedure.

2 1

3

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2 Cut the cable ties.

3 Detach the fan plate sub-assembly from the fan carrier.

4 Cut the cable tie from the back.

4

5

5 Detach the connector from the back.

6 Detach the connection sink from the fan carrier.

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6

7 Rotate the connection sink slightly and pull it out.

7

8 Detach the fan carrier screws (4 x M4) and the fan carrier from the module core.

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8

9 Install the fan carrier to the module core.

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9

10 Install the connection sink to the new fan carrier.

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11 Connect the connector.

12

11

DN70422945

12 Fix with a cable tie.

13 Install the new fan plate sub-assembly to the fan carrier.

Apply plastic friendly adhesive (or thread locking compound, for example Loctite 243) over the screws before installing the fans. Tighten the screws to 1.0 Nm (0.74 ft lbs).

14

15

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14 Fix the fan cable with cable ties.

2.5 Replacing module fans for RF Module (FXxx)

Purpose

If a module fan fails or becomes degraded, replace it with a new one.

In stack, wall, pole and Flexi Cabinet for Indoor (FCIA) installation, fans can be replaced from the back of the module if there is enough space behind the BTS. For information on the required clearances for maintenance, see Module clearances or FCIA clearances

and anchoring holes in Flexi Multiradio Base Station Installation Site Requirements.

When removing fans from the back of FCIA, you need to remove the back panel. For instructions, see Removing the back panel of FCIA for fan maintenance in Maintaining

Flexi Cabinet for Indoor.

When removing fans from the back, make sure you have a screwdriver that fits the clearance. For example, if the clearance is 300 mm (11.8 in.), the screwdriver should be shorter than 300 mm (11.8 in.).

If there is not enough space for replacing the fans from the back, you can also replace the fans from the front. In this case you need to disable power to the module and pull it out from the casing or cabinet. For instructions on how to remove the module, see

Replacing RF Module (FXxx).

In Flexi Cabinet for Outdoor (FCOA), fans are replaced from the front.

Note that when replacing fans, an alarm indicating a broken fan may be seen. After you have replaced the fan, the alarm is cancelled.

Shut down the module before replacing fans. See instructions in Replacing RF Module

(FXxx).

Do not touch the rotating fans.

NOTICE: Risk of damage to equipment. The modules may be damaged if operated for

a long time in the upper ambient temperature range. Replace a faulty unit as soon as possible.

Removing the fan assembly of RF Module

1 Block the TRXs associated with the module that has the faulty fan assembly, with Flexi BTS Site Manager. If Baseband or Antenna Hopping is used, block the entiresector.

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When the object is blocked with the Flexi BTS Site Manager, the BTS waits until the maximum timeout for the BSC to transfer calls before changing the LED status to indicate that the sector is locked.

2 Connect the ESD wrist strap.

3 Wait for the RF Module Status LED to change to a blinking green state, which indicates traffic has been blocked.

4 Disable power to the module with the Flexi BTS Site Manager.

See Disabling and enabling power with the 2G Flexi BTS Site Manager.

5 If this is a pole, wall, stack, or FCIA installation with back maintenance access, remove the back cover or back wall.

6 If back maintenance access is not available, remove the module.

Note that if this is a pole, wall, or stack installation, you will need to also remove the front covers and cable entries before removing the module.

7 Detach the six M4 screws on the fan assembly.

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Figure 11 Remove the screws

8 Pull the fan plate out.

Figure 12 Pull the fan plate out

9 Removing the fan connector.

Depending on the module type perform the following:

•

For 60 W RF Module variants, twist the fan connector counter-clockwise and gently pull it out to disconnect it from the RF module.

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Figure 13 Removing the fan connector in 60 W RF Module

•

For 80 W RF Module variants, pull the connector apart.

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10 Remove the fan assembly.

Figure 15 Remove the fan assembly

Steps

1 Block the TRXs associated with the module that has the faulty fan assembly, with Flexi BTS Site Manager. If Baseband or Antenna Hopping is used, block the entiresector.

Alternatively, you can request to lock the TRXs/sector/BCF from the BSC.

When the object is blocked with the Flexi BTS Site Manager, the BTS waits until the maximum timeout for the BSC to transfer calls before changing the LED status to indicate that the sector is locked.

2 Connect the ESD wrist strap.

3 Wait for the RF Module Status LED to change to a blinking green state, which indicates traffic has been blocked.

4 Disable power to the module with the Flexi BTS Site Manager.

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5 If this is a pole, wall, stack, or FCIA installation with back maintenance access, remove the back cover or back wall.

6 If back maintenance access is not available, remove the module.

Note that if this is a pole, wall, or stack installation, you will need to also remove the front covers and cable entries before removing the module.

7 Detach the six M4 screws on the fan assembly.

Figure 16 Position of the fan connector and screws.

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8 Pull the fan plate out.

Figure 18 Pull the fan plate out

9 Removing the fan connector.

•

For 60 W RF Module variants, twist the fan connector counter-clockwise and gently pull it out to disconnect it from the RF module.

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•

For 80 W RF Module variants, pull the connector apart.

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10 Remove the fan assembly.

Figure 21 Remove the fan assembly

Installing the fan assembly of RF Module

1 Align the arrows on the fan connector and the RF Module fan connector and push the connector.

•

For 60 W RF Module variants, align the arrows of the new fan module's fan connector and the RF Module's fan connector, and push the connector in. The connector will make a 'click' sound when connected.

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Figure 22 Aligning the arrows and connecting the fan connector in 60 W RFM

•

For 80 W RF Module variants, align the arrow of the new fan assembly connector with the arrow of the existing module fan connector. Push the connectors together until you hear a 'click' sound.

2 Slide the new fan assembly in the module.

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Figure 24 Slide the new fan assembly

Use the guide holes to make sure the plate is properly aligned.

Figure 25 Proper Alignment of guide holes

3 Tighten the six screws.

4 If the module was removed, reinstall the module and its cables.

5 Enable power to the module with the Flexi BTS Site Manager.

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6 Check that the new fans start to rotate.

7 Check that the fan alarm (which was activated when the faulty fan module was removed) is cancelled from Flexi BTS Site Manager.

8 Unblock the TRXs or sector with Flexi BTS Site Manager.

Alternatively, if the TRXs or sector were locked from the BSC, request to unlock them from the BSC.

9 Re-install any removed cable entries, covers, or back wall.

Steps

1 Align the arrows on the fan connector and the RF Module fan connector and push the connector.

•

For 60 W RF Module variants, align the arrows of the new fan module's fan connector and the RF Module's fan connector, and push the connector in. The connector will make a 'click' sound when connected.

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•

For 80 W RF Module variants, align the arrow of the new fan assembly connector with the arrow of the existing module fan connector. Push the connectors together until you hear a 'click' sound.

2 Slide the new fan assembly in the module.

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Figure 28 Slide the new fan assembly

t

Use the guide holes to make sure the plate is properly aligned.

Figure 29 Proper Alignment of guide holes

3 Tighten the six screws.

4 If the module was removed, reinstall the module and its cables.

5 Enable power to the module with the Flexi BTS Site Manager.

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6 Check that the new fans start to rotate.

7 Check that the fan alarm (which was activated when the faulty fan module was removed) is cancelled from Flexi BTS Site Manager.

8 Unblock the TRXs or sector with Flexi BTS Site Manager.

Alternatively, if the TRXs or sector were locked from the BSC, request to unlock them from the BSC.

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3 Replacing modules

3.1 Replacing RF Module

3.1.1 Replacing faulty RF Module

Purpose

If an RF Module fails and you have done troubleshooting, the RF Module core must be replaced with a new one. The module core can be pulled out from the casing and replaced without dismounting the module stack.

The RF Module core can be replaced without shutting down the BTS; the System Module and the remaining RF Modules remain functional during the operation. Depending on the failure type, it is recommended that the module is run down with the BTS Site Manager.

Even when an RF Module is faulty or has been blocked as a result of operator's activity, the RF Module fans might still work.

NOTICE: Installing and commissioning of BTS products must be performed by an

expert familiar with electronic devices, to avoid damage caused by improper handling.

WARNING! Risk of electric shock.

Before turning RF power on, RF ports should be terminated by nominal 50Ω load (for example, feeder with antenna).

However, if these conditions are not met, the plastic caps that are delivered within the unused RF ports should remain in place. The plastic caps isolate RF power from the environment, and thus provide electric shock security in case RF power is accidentally on.

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Figure 30 Replacing RF Module

1 Loosen the screws and remove the module front cover (if installed).

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3 Run down the faulty RF Module with the BTS Site Manager.

4 Switch off the faulty RF Module fuse on the System Module front panel.

5 Disconnect the cables on the RF Module front panel.

w

6

7

8

9

NOTICE: Optical fibre cables and cable connectors are sensitive. Keep optical fibre

cables and cable connectors clean.

Pull aside all the cabling routed in front of the RF Module to be replaced, if any.

Loosen the cable entry screws and remove the cable entries.

Detach the module fixing screws.

Pull out the module core from the casing.

The module core is hot. Do not remove the module core until it has cooled down.

The module is heavy. Take care when lifting the module.

10 Insert the new core in the module casing.

11 Fix the core to the casing with screws and tighten to 5 Nm (3.69 ft lbf).

12 Install the cable entries and tighten the screws.

13 Install the optical transceiver to the RF Module.

14 Connect the cables to the RF Module front panel as instructed in the Cabling

Flexi Multiradio BTS [technology] document.

a) Connect the antenna cables. b) Connect the optical cable.

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16 Push the connector seals firmly in place.

17 Check that the connectors are properly connected.

18 Switch on the RF Module fuse on the System Module front panel.

19 Commission the BTS with the BTS Site Manager.

3.1.2 Replacing Single and Dual RF Modules with 3-sector RF

Module

3.1.2.1 Replacing Single and Dual RF Modules with Flexi Multiradio RF

Module FRGT

Purpose

The following instructions show how to replace 1+1+1 with 2xFRGC stack configuration with FRGT. These instructions are applicable to other 3-sector modules.

1 Block the cells.

2 Shut down the BTS.

3 Disconnect the optical cables and optical transceivers from RFM1 and RFM2.

4 Disconnect the DC cables from RFM1 and RFM2.

5 Disconnect the antenna feeders from RFM1 and RFM2.

6 Disconnect the grounding cables from RFM1 and RFM2.

7 Loosen the fastening screws and remove the RF Modules from their casings.

8 Install FRGT in a free 3U casing.

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9 Insert the IP boot to the DC cable prior to connecting it.

10 Connect the DC supply cable.

FRGT requires an AWG10 size DC supply cable as a minimum.

An AWG12-sized DC supply cable assembly 994808A was delivered with Flexi Dual and Single RF Modules. It cannot be used with FRGT. The following options can be used for FRGT DC voltage supply in stack configurations:

•

FPCC 472823A.202 (AWG10 - 2 meters): DC Cable assembly, one end with a multi-beam connector, other end open.

•

DC cable assembly 995281B (AWG10 - 2 meters): Both ends with multi-beam connectors (one of them needs to be cut off).

Figure 31 DC cable

11 Connect the grounding cable.

12 Install the existing optical transceivers (SFP) and connect optical cables.

Note that the FRGT optical port angle is flipped 180 degrees compared to Flexi Rel 1 and Rel 2 RF Modules.

Existing optical cables and optical transceiver (SFP) modules can be reused on FRGT installation for the 3GB OBSAI link.

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Figure 32 Optical port

13 Connect the antenna feeders.

14 Fasten the IP seals for the DC cable and optical connection.

Optical transceiver (SFP) angle is 180 degrees different compared to Flexi Rel 1 and Rel 2 RF Modules.

A pre-bent optical cable turns to the right, and the optical cable needs routing outside the front cover. Bending radiuses for D7 mm and D5 mm optical cables are 70 mm (2.76 in) and 50 mm (1.97 in) respectively.

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Figure 33 FRGT

15 Switch on the BTS and recommission it.

3.1.2.2 Reusing Flexi 3U Casing + FMCA (Front and Back Cover)

Purpose

The following instructions show how to modify an FMCA front cover to correspond to the FMCA A.207 version by removing the air deflector plate.

Flexi Multiradio RF Module FRGT can be installed inside a 19-inch rack without a casing. In a stand-alone 19-inch rack installation, front and back covers must be installed for safety purposes. A casing is required to mount the rear cover. Therefore, Flexi Module Casing (EMHA) for 3 height units (3U) 470316A is required for installation.

In modernization cases Flexi Multiradio RF Module FRGT can be installed inside existing Flexi 3U casing versions. Existing RF cable entries can be reused for FRGT installation. An existing front cover need to be modified.

The air deflector plate is ultrasonic welded to the front cover. There are six welding points on the front cover.

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For air deflector plate removal, use a regular file or similar kind of blunt end tool, which end size is approximately 5 mm x 20 mm (0.2 in x 0.79 in). Do not use a screwdriver, because the end size is too narrow and it can create sharp corners on the front cover.

Figure 35 Regular file with end size 5 mm x 20 mm

1 Place the file end close to the air deflector ultrasonic welding point.

2 Loosen the ultrasonic welding point with a sharp hit to the file handle.

Each ultrasonic welding point needs to be loosened separately.

Figure 36 Each ultrasonic welding point loosened separately

3 Remove the air deflector plate.

4 Ensure that there are no sharp corners, which could damage the cables, on the front cover.

Flexi 3U Mounting Covers Front/Back FMCA version 470239A.207 and EDGE Mechanical 3U Unit EMHA version 470316A.209 include a front cover without an air deflector plate.

3.2 Replacing System Module

Purpose

If the System Module fails, the module core must be replaced with a new one. The module core can be pulled out from the casing and replaced without dismounting the module stack.

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hot swapped.

NOTICE: When replacing the Extension System Module with a Module of a different

capacity (for example, when replacing the FSME with the FSMD), do the following: 1.

2. 3. 4. 5.

Remove the current Extension System Module. Perform Site Reset using the Site Manager. Remove the unit in Site Manager.

Insert the new Extension System Module. Perform the BTS reset.

Take a commissioning file backup before replacing the module.

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1 Block the BTS with the BTS Site Manager.

2 Shut down the BTS by switching off all the fuses on the System Module.

3 Disconnect the DC power mains breaker.

5 If the front panel cover is installed, loosen the screws and remove the module front panel cover.

6 Disconnect the cables in the System Module front panel.

8 Detach the module fixing screws.

9 Pull the module core out of the casing.

10 Disconnect the power cable.

11 Uninstall the transmission sub-module.

Make sure that the FCM-FTM connection card is in place at the new module core. For additional information on how to uninstall and install the transmission sub-

module, see Replacing transmission sub-module in this document.

12 Install the transmission sub-module to the new module core.

13 Connect the power cable to the FPFA or FPFB sub-module (depending on your System Module version) of the new System Module core.

Check that the polarity is correct. Connect the wires to the V48N- and V48RTN+ connectors according to the markings on the cable.

NOTICE:

Risk of power supply failure and, in rare cases, of short circuit. Check that the polarity is correct according to the markings on the cable.

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14 Insert the new core in the module casing.

15 Fix the core to the casing with screws and tighten to 5 Nm (3.69 ft lbs).

17 Install the optical transceivers to the System Module.

18 Connect the cables to the System Module front panel.

22 Switch on the DC mains power.

23 Restart and commission the BTS.

3.3 Replacing transmission sub-module

Purpose

If the transmission sub-module fails, or the transmission sub-module type changes, the transmission sub-module needs to be replaced with a new one.

A faulty FTIA, FTIB, FTJA or FTLB transmission sub-module must be returned to Nokia Hardware Services (HWS) without the SFP transceiver units.

When replacing transmission sub-modules, the FCM-FTM connection card and the screws are not part of HWS returned or repaired units.

The BTS must be shut down when the transmission sub-module is replaced. Take a commissioning file backup before replacing the module.

It is recommended that the transmission sub-module be replaced in dry and clean conditions.

NOTICE: If the transmission sub-module is hot swapped, it should be inserted to the

System Module with factory settings or the transmission sub-module should be re- commissioned without connectivity to the transport network.

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1 Block the BTS with the BTS Site Manager.

3 Shut down the BTS by switching off all the fuses on the System Module.

4 Disconnect the DC power mains breaker.

5 If the front panel cover is installed, loosen the screws and remove the module front panel cover.

6 Disconnect the cables on the System Module front panel (if needed).

7 Disconnect the transmission cables.

9 Detach the module fixing screws.

10 Pull out the module core from the casing.

11 Loosen the 4 x M5 screws and detach the transmission sub-module.

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12 Check that the FCM-FTM connection card on the System Module is straight.

13 Align the new transmission sub-module with the two guide pins in the System Module, and push the sub-module in place.

14 If your transmission sub-module is FTOA, install the optical transceiver (delivered with the new unit).

15 If your transmission sub-module is FTIA, FTIB or FTJA and you use an optical GE interface, move the optical transceiver (SFP module) from the old unit to the new unit or replace the transceiver with a new one (not included in the delivery).

For specifications of suitable SFP modules, see Ethernet Small Form-factor

Pluggable (SFP) transceivers in the Flexi Multiradio BTS WCDMA Transmission Description document.

16 Fix the transmission sub-module with 4 x M5 screws and tighten to 4 Nm (2.95 ft lbs).

17 Insert the module core inside the module casing.

18 Fix the core to the casing with screws and tighten to 5 Nm (3.69 ft lbs).

20 Reconnect the disconnected transmission cables.

21 Reconnect the disconnected cables to the System Module front panel (if needed).

If using optical cables, do not bend them to a radius smaller than the minimum radius of 75 mm (3 in).

Make sure that there is no dust or other dirt on the optical connector. If necessary, clean the connector with a special optical cleaner.

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24 Switch on the DC mains power.

25 Restart and reconfigure the BTS.

3.4 Replacing Flexi Power Distribution and Fuses

(FPFx) Submodule

Purpose

The following instructions show how to replace a faulty FPFA/FPFB submodule.

Remove the System Module front cover, disconnect the necessary cables, and remove the external cable entries.

WARNING! Risk of electric shock.

Shut down the BTS before replacing the FPFx submodule.

If the FPMA is in use, switch the FPAA and FPBA/FPBB to standby mode (the LED color will turn yellow). If the external rectifier or battery is in use, turn it off.

1 Pull the System Module core out of the casing.

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2 Remove the cable tie from the fan carrier and disconnect the cable from the fan carrier connection sink.

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3 Remove the cable tie from the DC power cable tie point.

Figure 41 Removing the cable tie from DC power cable tie point

4 Disconnect the DC power cable.

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5 Loosen the screws that fix the FPFA/FPFB to the module core and remove the FPFA/FPFB.

FPFA and FPFB v. 103 or older has four screws. FPFB v. 104 or later has three screws. Keep the screws as you will need them to reinstall the new FPFx submodule.

Figure 43 Loosening FPFx screws from System Module

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6 Make sure that the FCM-FPF connection card is in place on the System Module.

Figure 45 Location of the FCM-FPF connection card

7 Install the FPFA/FPFB and fix the screws. Tighten to 4.3 Nm (3.17 ft lbs).

FPFA and FPFB v. 103 or older has four screws. FPFB v. 104 or later has three screws.

Figure 46 Fixing FPFx submodule to System Module

8 Connect the DC power cable to the FPFx. Tighten the screws to 5.0 Nm (3.69 ft lbs).

For more detailed instructions, see Connecting external power feed in the Cabling

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Figure 47 Connecting DC power cable

9 Fix the DC power cable to the cable tie point with a cable tie.

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10 Connect the cable to the fan carrier and fix the cable to the fan carrier with a cable tie.

Figure 49 Connecting and fixing the cable to fan carrier

11 Insert the module core into the casing.

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12 Connect the necessary cables, and install the System Module casing front cover.

Figure 51 Installing the System Module casing front cover

3.5 Replacing Flexi Power Module (FPMA)

Purpose

To replace the FPMA casing, in case it has been damaged, follow the steps below.

NOTICE: Switch off the BTS before performing this procedure. Take a commissioning

file backup before replacing the module.

DANGER! Danger of lethal voltages.

Switch off the AC power breaker before connecting the AC cable.

DANGER! Danger of lethal voltages.

If battery modules (FPBA/FPBB) are used, make sure to turn them off before switching off the AC power.