Nokia SSS1100 User manual

Document Number/Version ©1999 Nokia Telecommunications Oy
NTC DN9986052/1.0.0
SSS1100 / 1100+ AND SSS2 OUTDOOR
Maintenance Manual

Maintenance Manual
Page ©1999 Nokia Telecommunications Oy Document Number/Version
(ii)NTC DN9986052/1.0.0
The information in this document is subject to change without notice and describes only the
product and its version defined in the introduction of this document. This document is intended for
the use of Nokia Telecommunications' customers only for the purposes of the agreement under
which the document is submitted, and no part of it may be reproduced or transmitted in any form
or means without the prior written permission of Nokia Telecommunications. The document has
been prepared to be used by professional and properly trained personnel, and the customer
assumes full responsibility when using it. Nokia Telecommunications welcomes customer
comments as part of the process of continuous development and improvement of the
documentation.
The information or statements given in this document concerning the suitability, capacity, or
performance of the mentioned hardware or software products cannot be considered binding but
shall be defined in the agreement made between Nokia Telecommunications and the customer.
However, Nokia Telecommunications has made all reasonable efforts to ensure that the
instructions contained in the document are adequate and free of material errors and omissions.
Nokia Telecommunications will, if necessary, explain issues which may not be covered by the
document.
Nokia Telecommunications' liability for any errors in the document is limited to the documentary
correction of errors. Nokia Telecommunications WILL NOT BE RESPONSIBLE IN ANY EVENT
FOR ERRORS IN THIS DOCUMENT OR FOR ANY DAMAGES, INCIDENTAL OR
CONSEQUENTIAL (INCLUDING MONETARY LOSSES), that might arise from the use of this
document or the information in it.
This document and the product it describes are considered protected by copyright according to
the applicable laws.
NOKIA logo is a registered trademark of Nokia Corporation.
Other product names mentioned in this document may be trademarks of their respective
companies, and they are mentioned for identification purposes only.
Copyright © Nokia Telecommunications Oy1999. All rights reserved.

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INTERNAL HISTORY PAGE
Archive
Location: \\ntcsrv03ca\groupdat\SiSo\ET2 Family
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Filename: Maintenance manual.doc
History
Date Version Author Change Note No./Notes
18 March 99 0.0.1 Tyrone Williams First Draft
28 July 99 1.0.0 Tyrone Williams Authorised

Maintenance Manual
Page ©1999 Nokia Telecommunications Oy Document Number/Version
(iv)NTC DN9986052/1.0.0
APPROVAL PAGE
Edited/Translated by: T Williams Date:
Checked by: A Weeber Date:
Approved by: M Weckström Date:

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CONTENTS
1. INTRODUCTION..................................................................................................4
1.1. Fault reporting...............................................................................................4
1.2. Environmental restrictions.............................................................................4
2. TOOLS AND TEST EQUIPMENT........................................................................6
2.1. Maintenance tools list....................................................................................6
2.1.1. SSS1100 / 1100+ and SSS2 cabinet located with a BTS...................7
3. PERIODICAL MAINTENANCE MEASURES .....................................................8
3.1. Cabinet maintenance......................................................................................8
3.1.1. Cleaning the SSS1100 / 1100+ and SSS2.........................................8
3.1.2. Access to the plinth base..................................................................8
3.1.3. Cabinet paint....................................................................................9
3.1.4. Lock..............................................................................................10
3.1.5. Hinges ...........................................................................................10
3.1.6. Seals..............................................................................................10
3.1.7. Cabinet interior check....................................................................13
3.2. Site..............................................................................................................13
4. HMU MAINTENANCE.......................................................................................14
4.1. Cleaning fans...............................................................................................14
4.2. Cleaning the exchanger plates (ACU)..........................................................15
4.3. Replace drain tube (ACU) ...........................................................................15
4.4. Cleaning the recuperator (HE).....................................................................16
5. BATTERY BACKUP UNIT ................................................................................17

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5.1. Visual checks.............................................................................................. 17
5.1.1. External damage............................................................................ 17
5.1.2. Pressure spots ............................................................................... 17
5.1.3. Deformities................................................................................... 17
5.1.4. Corrosion of battery terminals....................................................... 18
5.1.5. Acid escape................................................................................... 18
5.1.6. Accessories check......................................................................... 18
5.2. Mechanical checks...................................................................................... 18
5.2.1. Terminal screws torque check....................................................... 19
5.2.2. Battery terminals greased.............................................................. 19
5.3. Environmental conditions ........................................................................... 19
5.3.1. Battery ventilation......................................................................... 20
5.3.2. Battery compartment temperature ................................................. 20
5.4. General measurements................................................................................ 20
5.4.1. Batteries idle voltage..................................................................... 21
5.4.2. Entire float charge voltage............................................................. 21
5.4.3. Single float charge voltage............................................................ 21
5.5. Completing the BBU maintenance.............................................................. 22
6. SMOKE DETECTOR.......................................................................................... 23
7. MAINTENANCE CHECKLIST.......................................................................... 25
8. REFERENCES.................................................................................................... 27

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1. INTRODUCTION
This document describes the maintenance of the SSS1100 / 1100+ and SSS2
cabinets as a post-integration function check. This document is to be used together
with [8] and [9]. This document is intended for the service personnel of the network
operator.
The SSS1100 / 1100+ and SSS2 cabinets are designed to work in conjunction with
a Nokia DE / DF 34 Base Station and contain three main functions. They supply
DC power to the Base Station, house a battery backup system and provide space
and DC power for customer chosen and supplied RLEs.
The task of the maintenance is to check the functions of the SSS1100 / 1100+ and
SSS2 and its inventory periodically.
The maintenance is to be undertaken every six months using [3].
In special cases, e.g. dusty ambient conditions, shorter maintenance intervals may
be required. This should be decided at the discretion of Nokia and the customer.
1.1. Fault reporting
All damage, failures and faults should be corrected, wherever possible, during
installation of the cabinet, and reported to Nokia using a Failure Report Form
provided by the Customer Service Centre (CSC).
Update the site folder after maintenance measures or modifications.
1.2. Environmental restrictions
When doing maintenance work on the SSS1100 / 1100+ and SSS2 cabinet with the
front door or the roof open, follow the restrictions below:
1. Rain or snow must not be allowed to fall on the internal surfaces of the
equipment. The internal surfaces are the front panels, cables, connectors
and documentation.
2. The door must not be opened in environments where dust can be blown
into the cabinet through the open door.
3. If a cabinet door is opened in low temperatures (below +5°C), an adequate
heating and weather protection must be provided for the cabinet, in order
to maintain the cabinet temperature above +5°C.

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4. Avoid keeping the cabinet door open in high temperatures in order not to
disturb the cabinet cooling system.
5. Exercise great caution when opening a cabinet's roof in strong wind
conditions. A forceful wind may tear the roof panel off its hinges, and the
falling roof panel may cause danger to personnel and damage to the
equipment. Always secure the roof into position with the roof arrester.
6. Exercise great caution when opening a cabinet's door in strong wind
conditions. A forceful wind may open or close the door with such force
that it can cause danger to personnel and damage to the equipment.
Always secure the door into position with the door arrester.

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2. TOOLS AND TEST EQUIPMENT
This chapter details the tools and the measurement equipment required for the
maintenance of the SSS1100 / 1100+ and SSS2 cabinet.
2.1. Maintenance tools list
The essential commissioning tools are detailed below. A more detailed list of the
maintenance tools can be obtained from your nearest CSC.
Table 1Maintenance tools
No Item
1Anti-static hand strap
2Socket wrench, 10mm
3Screwdriver set, flat
4Screwdrivers, pozi-drive (cross head), sizes 1, 2 and 3
5Synthetic test gas for smoke sensor testing
6Hot air fan 230 AC, adjustable temperature
7Freezing spray
8BTS door key and door handle
9Compressed air for cleaning HE
10 Brush/cloths for cleaning, pH-neutral soap solution if necessary
11 Digital Multimeter
12 Voltmeter
13 Insulated torque spanner, 11 mm (6.78 Nm)

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2.1.1. SSS1100 / 1100+ and SSS2 cabinet located with a BTS
NOTEAll equipment must be calibrated according to the
manufacturer’s instructions before use.
1. Portable IBM-compatible PC with the following minimum configuration:
−IBM-compatible 486 SX or higher.
−DOS version 5.0 or higher.
−Microsoft Windows ‘95
−VGA display.
−5 MB of free disk space.
−600 Kbytes free conventional memory.
−RS232 serial port.
2. Nokia MMI software and cable for local and remote connections (ordered
from Nokia Telecommunications, Base Station Systems). The required
cable connections are shown in Table 2.
Table 2MMI cable connections
BCF D9 Male PC D9 Female PC D25 Female
Pin No. 2 TXD Pin No. 3 RXD Pin No. 2 RXD
Pin No. 3 RXD Pin No. 2 TXD Pin No. 3 TXD
Pin No. 5 GND Pin No. 5 GND Pin No. 7 GND
3. Nokia FPET2 software.
4. Multimeter.

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3. PERIODICAL MAINTENANCE MEASURES
WARNING!
Exercise great caution when maintaining the SSS1100 / 1100+
and SSS2. Refer to [3].
This chapter details the perioical maintenance measures for the SSS1100 / 1100+
and SSS2.
3.1. Cabinet maintenance
3.1.1. Cleaning the SSS1100 / 1100+ and SSS2
WARNING!
Turn the mains site power switch off before cleaning the
SSS1100 / 1100+ and SSS2.
Keep the SSS1100 / 1100+ and SSS2 clean; dust may affect the cabinet ventilation.
Vacuum or wipe the outside of the cabinets wherever dust has collected on the
surfaces.
After cleaning the exterior of the cabinets tick off the box in the checklist.
!
Cabinet exterior cleaned ¨yes or ¨no.
3.1.2. Access to the plinth base
The grid panel on the plinth lower edge may be removable, by unscrewing the ten
M6 bolts which secure it to the plinth, as shown in Figure 1.
The cabinet anchor bolts can be tightened via the access provided by the removal of
the grids. The access also enables the cleaning of the plinth base.

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M6 x 16 (10 pcs)
M6 x 16 (10 pcs)
M6 x 16 (10 pcs)
DN98914468
Figure 1Plinth access
After cleaning the plinth base tick off the box in the checklist.
!
Plinth base cleaned ¨yes or ¨no.
3.1.3. Cabinet paint
Check the exterior of the cabinets during site visits.
For corrections use Nokia ash grey 10A03 BS 4800 polyester paint.
Treat scratches, abrasions and other parts without paint on the cabinet surface as
follows:
1. Clean the surface of impurities with a piece of cloth or sandpaper.
2. Paint the area with the official paint
After checking the exterior of the cabinets and correcting any paint defects tick off
the box in the checklist.

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!
Cabinet paint ¨ok or ¨not ok.
3.1.4. Lock
Lubricate the lock once a year with lubricating oil.
If the cabinet is used in temperatures below 0°C, lubricate the lock with lubricating
anti-freeze oil or use both anti-freeze oil and lubricating oil.
After lubricating the lock tick off the box in the checklist.
!
Door lock lubricated ¨yes or ¨no.
3.1.5. Hinges
Lubricate the hinges once a year with petroleum jelly or lubricating oil.
After lubricating the hinges tick off the box in the checklist.
!
Hinges lubricated ¨yes or ¨no.
3.1.6. Seals
The cabinet must be checked for leakages. The seals around the front door, the heat
exchanger, air conditioner and the roof should ensure there are no leaks, dust or
water inside the cabinet.
In addition, although there may be no recognisable leakage, check that the cabinet
seals are not cracked or porous and that they fit properly.
Check all seals on the door, roof and HMU.
3.1.6.1. Door seal check
Check the cabinet door seal as follows:
1. Open the door with the key and handle.
2. Check that the seal does not show any cracks, or porosity.
3. Check that the seal fits properly as shown in Figure 2.

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Door seal
DN99109798
Figure 2Cabinet door seal
After checking the cabinet door seal tick off the box in the checklist.
!
Door seals ¨ok or ¨not ok.
3.1.6.2. Roof seal check
The roof seals have to be checked against cracks and porousness and for proper fit
Check the cabinet roof seal as follows:
1. Unlock the roof with the triangular key and handle.
2. Check the seal for signs of cracks, or porosity.
3. Check that the seals fit properly, as shown in Figure 3.

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Roof seal
DN99109817
Figure 3Cabinet roof seals
After checking the cabinet roof seal tick off the box in the checklist.
!
Roof seals ¨ok or ¨not ok.
3.1.6.3. HMU seal check
The roof must first be removed before the HMU can be checked. Refer to [8].
Check the HMU seals as follows:
1. Unlock the HMU with the triangle BTS door key and remove it from the
cabinet.
2. Check the seal for signs of cracks, or porosity.
3. Check that the seal fits properly.
After checking the ACU or HE seal tick off the box in the checklist.
!
HMU seal ¨ok or ¨not ok.

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3.1.7. Cabinet interior check
After checking the cabinet interior for dust and humidity tick off the box in the
checklist.
!
No dust and humidity inside the cabinets ¨ok or ¨not ok.
3.2. Site
Keep the front of the SSS1100 / 1100+ and SSS2 clean. Keep the plinth holes and
air inlets unobstructed to maintain the proper circulation of air.
After checking the site tick off the box in the checklist.
!
Plinth holes and air inlets unobstructed ¨yes or ¨no.

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4. HMU MAINTENANCE
This section details the maintenance of the HMU
In case of a fault in the HMU, contact the Nokia CSA.
HMU maintenance is to be performed every six months.
Maintenance can only be carried out with the HMU removed from the cabinet.
Refer to [8] for details of HMU removal and installation.
Check the HMU as follows:
1. Remove the HMU from the cabinet.
2. If the HMU is an ACU, check the condensation drain tube fitted between the
bottom of the ACU and the housing for blockage, and clear as needed.
3. Clean both internal and external fans and the exchanger plates.
NOTEIf a failure of the cooling circuit occurs during service, then the
complete HMU must be exchanged. Repairs to the HMU must
only be carried out by the manufacturer or a licensed agent.
WARNING!
Before opening the cover or replacing components, make sure
that power to the unit is switched off and all power plugs are
disconnected from their sockets.
After removing the HMU, keep it in an upright position at all
times. If the unit is not kept upright during maintenance, it
must be allowed to stand in the upright position for 24 hours,
before any attempt is made to restart the HMU
4.1. Cleaning fans
Dust sedimentation will occur on fan impellers (especially the external fan). To
ensure optimum performance and prevent vibration, which will damage the
bearings and reduce lifetime, they must be cleaned every six months.
CAUTION Keep the HMU upright at all times
Clean the fans as follows:
1. Loosen all the cables from the HMU and remove any battery breather tubes.
2. Move the HMU to a position where it can be supported upright.

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3. Remove the front cover from the HMU by turning the screws a quarter of a
turn. Before taking away the cover plate, disconnect the earth cable. There is
now access to the HMU fixing screws, the internal fan and the exchanger
plates.
4. Remove the six off M6 nuts that secure the unit into the housing and remove
the unit completely.
5. Remove the fan cover plate from the rear of the housing to gain access to the
external fan.
6. The impellers are to be cleaned with a brush or compressed air, or in special
circumstances with brush and a pH-neutral soap/water solution (external fan
only).
CAUTION Sedimentation on the internal air path indicates a leak in the
cabinet and further action is needed.
After cleaning the fans tick off the box in the checklist.
!
Fans cleaned ¨yes or ¨no.
4.2. Cleaning the exchanger plates (ACU)
Dust sedimentation will occur on the exchanger plates of the ACU and to ensure
optimum performance they must be cleaned every six months.
CAUTION Keep the ACU upright at all times.
Exchanger plates to be cleaned with compressed air.
CAUTION Sedimentation on the internal air path indicates a leak in the
cabinet and further action is needed.
After cleaning the exchanger plates tick off the box in the checklist.
!
Exchanger cleaned (ACU) ¨yes or ¨no.
4.3. Replace drain tube (ACU)
The condensation drain tube of the ACU may become blocked. Therefore it must
be serviced every six months to ensure optimum performance.
The condensation drain tube is located at the bottom of the ACU and exits the
housing via a rubber bushing on the lower edge of the housing.

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Service the drain tube as follows:
1. Remove the ACU from the back of the cabinet.
2. Remove the clip at the top of the tube.
3. Draw the other end of the tube from the rubber bushing
4. Replaced the tube with a new one.
!
Drain tube replaced (ACU) ¨yes or ¨no.
4.4. Cleaning the recuperator (HE)
Dust sedimentation will occur on the recuperator (especially the external air path)
and must be cleaned every six month to ensure optimum performance.
Recuperator plates are to be cleaned with compressed air, or in special cases with a
pH-neutral soap/water solution (external air path only) sprayed on with compressed
air.
CAUTION Do not use water spray for the fans. Use compressed air and/or
water spray only for the external air path of the recuperator;
being careful not to damage the foam seal.
Sedimentation on internal air path indicates a leak in the
cabinet or enclosure and further action is needed.
After cleaning the recuperator tick off the box
!
Recuperator cleaned (HE) ¨yes or ¨no.