Replace Power Units RBS 6320
OPERATING INSTRUCTIONS
Ge9290A
124/1543-LZA 701 6001 Uen D
Copyright © Ericsson AB 2015-2016. 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.
124/1543-LZA 701 6001 Uen D | 2016-05-04
Contents
Contents 1
Introduction
1
2
Prerequisites
3
2.1
Documents
3
2.2
Tools
3
2.3
Conditions
4
2.4
Cabinet Internal Cabling
4
3
Perform Introductory Routines
5
4
Replace the PCF
9
4.1
Replace PCF 01 07
11
4.2
Replace PCF 02 07
15
5
Replace the EMU
25
6
Replace the PDU
27
6.1
Remove the PDU
28
6.2
Install the PDU
31
6.3
Recommended PCR Switch Configuration
36
7
Replace the SHU
39
7.1
Remove the SHU
39
7.2
Install the SHU
40
8
Perform Concluding Routines
43
Reference List
124/1543-LZA 701 6001 Uen D | 2016-05-04
47
Replace Power Units
124/1543-LZA 701 6001 Uen D | 2016-05-04
Introduction
1
Introduction This document describes how to replace the power units in RBS 6320. For information about replacing power units that are attached to the external radio units such as Remote Radio Units (RRUs), refer to Replacing Remote Radio Units, or the replacement instructions for the power system.
124/1543-LZA 701 6001 Uen D | 2016-05-04
1
Replace Power Units
2
124/1543-LZA 701 6001 Uen D | 2016-05-04
Prerequisites
2
Prerequisites This section contains information on the documents, tools, and conditions that apply to the replacement procedures.
2.1
Documents Make sure that the following documents have been read and understood: • Personal Health and Safety Information • System Safety Information See Reference List on page 47 for required documents.
2.2
Tools Before starting, ensure that the tools listed in Table 1 are available: Table 1
Tools Required Tool
Product Name ESD
(1)
TORX® screwdriver: • Torx T15 • Torx T20 • Torx T30 Torque wrench with 1/4 inch hex bit drive: • 0.5–4 Nm • 5–25 Nm (1) Electrostatic Discharge wrist strap
124/1543-LZA 701 6001 Uen D | 2016-05-04
3
Replace Power Units
2.3
Conditions Before going to site, ensure that the following conditions are met:
2.4
•
The instruction that refers to this document is available, if applicable.
•
The new unit is available.
•
The new unit is undamaged and corresponds to the instruction.
•
An additional ESD bag for the unit to be removed is available, if applicable.
•
A space in the subrack or the cabinet for the unit is available, if applicable.
•
All keys are available and site access is granted.
•
The documents referred to in Reference List on page 47 are available.
Cabinet Internal Cabling For more information about cabinet internal cabling, refer to Non-RF Connections.
4
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform Introductory Routines
3
Perform Introductory Routines Before replacing the units, do the following: For the new unit, examine the packaging for damage.
1.
If it is damaged, make an immediate complaint to the transport company.
Ge7236C
Check that the items delivered correspond to the packing list.
2. A
Examine the unit for damage. For more information, refer to Handling Faulty Equipment. rder
kO
Wor A
B
C D
Ge7263C
124/1543-LZA 701 6001 Uen D | 2016-05-04
5
Replace Power Units
3.
Examine the unit for damage. For more information, refer to Handling Faulty Equipment. Ge9570A
Inform the Operation and Maintenance Center (OMC) that work is to start at the site. The OMC can then decide what measures are necessary to minimize service disruptions.
4.
Ge6814D
Open the cabinet door.
5.
2
1 Ge10018A
6
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform Introductory Routines
6.
Put on the ESD wrist strap and connect the crocodile clip to the RBS.
Ge0603D
124/1543-LZA 701 6001 Uen D | 2016-05-04
7
Replace Power Units
8
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
4
Replace the PCF This section describes how to remove and install a Power Connection Filter (PCF) in the cabinet. The PCF unit can be of two different models, PCF 01 07 or PCF 02 07. The two models are shown in Figure 1 and Figure 2.
07 PCF 01 ) –48V RTN (0V 4 Nm
) RTN (0V
–48V
Ge10778A
Figure 1
PCF, Model 01 07
124/1543-LZA 701 6001 Uen D | 2016-05-04
9
Replace Power Units
PCF
Ge0777B
Figure 2
PCF, Model 02 07
The procedure for replacing the PCF depends on the model. The instructions are described in the following chapters: •
Replace PCF 01 07, see Section 4.1 on page 11
•
Replace PCF 02 07, see Section 4.2 on page 15
Stop! Do not install or modify AC or DC powered equipment unless you are a qualified and authorized electrician. Improper installation work can seriously damage the equipment.
Do! Use an ESD wrist strap to avoid damage to components mounted on printed board assemblies.
10
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
4.1
Replace PCF 01 07
4.1.1
Remove the PCF To remove the PCF: Switch off the -48 V DC power to the RBS.
1.
ON
OFF
Ge6817E
2.
Locate the PCF.
Ge9324G
124/1543-LZA 701 6001 Uen D | 2016-05-04
11
Replace Power Units
3.
Remove the PCF from the DIN rail with a flat screwdriver.
F
07 –48 01 ) V ( 0 Nm 4
TN R
C P
For more cable slack, push the power supply cables into the cabinet. Make sure that the cables run smoothly through the cable entries.
V
TN R V (0 ) –4 8V
Ge10779A
Write down the positions of the cables that are connected to the cable clamps of the PCF.
4.
Ge7990E
5.
Disconnect the power cable between the PCF and the Power Distribution Unit (PDU).
Ge9464A
12
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
6.
Note: Before loosening the cables, use a multimeter to check that the voltage is 0 V.
T20
07 PCF 01 ) –48V RTN (0V 4 Nm
Loosen the cable clamps and pull out the cables.
) RTN (0V
–48V
Ge10781B
4.1.2
Install the PCF To install the PCF: 1.
If applicable, cut the cables to the appropriate length.
Ge9484A
If applicable, strip the cables.
2. Coax Cable Stripper
20 mm
Ge9485A
124/1543-LZA 701 6001 Uen D | 2016-05-04
13
Replace Power Units
3.
Push each cable into the relevant cable clamp until no copper wire is visible.
T20
07 PCF 01 ) –48V RTN (0V 4 Nm
Make sure that the cables are connected to the correct poles.
4.0 Nm
Tighten the cable clamps. ) –48V
RTN (0V
Ge10781A
4. F
07 – 4 8 01 ) V (0 Nm 4
TN R
C P
Install the PCF on the DIN rail. V
For less cable slack, pull the power supply cables from the cabinet. Make sure that the cables run smoothly through the cable entries.
TN R ) V (0 –4 8V
click Ge10782A
5.
Connect the power cable between the PDU and the PCF.
Ge9493A
14
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
6.
Perform the concluding routines, see Section 8 on page 43.
4.2
Replace PCF 02 07
4.2.1
Remove the PCF To remove the PCF: 1.
Switch off the -48 V DC power to the RBS.
ON
OFF
Ge6817E
2.
Locate the PCF.
Ge9324E
124/1543-LZA 701 6001 Uen D | 2016-05-04
15
Replace Power Units
3.
Disconnect the power cable between the PCF and the Power Distribution Unit (PDU).
Ge9464A
Remove the PCF cover.
4.
Ge9466A
16
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
5.
Loosen the PCF from the cabinet.
7 mm
Ge9467A
Pull out the PCF.
6.
For more cable slack, push the power supply cables into the cabinet. Make sure the cables run smoothly through the cable entries.
Ge9481A
Note:
For an RBS that is configured with an EMU, disconnect the EC bus cable between the EMU and the SHU if the cable is not long enough for pulling out the PCF of the cabinet. For an overview image of the EMU and the EC bus cable, see Page 25.
124/1543-LZA 701 6001 Uen D | 2016-05-04
17
Replace Power Units
7.
Loosen the cable holder. T20 Torx
Ge9482D
Loosen the cable clamps and pull out the cables.
8. T30 Torx
1
2
Ge9483D
4.2.2
Install the PCF To install the PCF: If applicable, cut the cables to the appropriate length.
1.
Ge9484A
18
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
2.
If applicable, strip the cables.
Coax Cable Stripper
20 mm
Ge9485A
Route the cables through the cable holder.
3. 0 V is -48 V DC Return -48 V
-48 V_RTN (0 V)
Ge9553C
Note:
Make sure that the cables are connected to the correct poles.
124/1543-LZA 701 6001 Uen D | 2016-05-04
19
Replace Power Units
4.
Push each cable into the relevant cable clamp until no copper wire is visible.
Ge0172E
5.
Tighten the cable clamps. T30 Torx
6.0 Nm
Ge9483C
6.
Tighten the cable holder. T20 Torx
0.8 Nm
Ge9482C
20
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
7.
Install the PCF. For less cable slack, pull the power supply cables from the cabinet. Make sure the cables run smoothly through the cable entries.
Ge9489A
Tighten the PCF.
8. 7 mm
2.5 Nm
Ge9480C
124/1543-LZA 701 6001 Uen D | 2016-05-04
21
Replace Power Units
9.
Install the cover.
Ge9490A
10. Connect the cable between the EMU and the SHU, if applicable. Connect the power cable between the PDU and the PCF.
11.
Ge9493A
22
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PCF
12.
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform the concluding routines, see Section 8 on page 43.
23
Replace Power Units
24
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the EMU
5
Replace the EMU This section describes how to remove the Energy Meter Unit (EMU). The replacement of the EMU requires the PCF to be temporarily removed. The EMU is shown in Page 25.
Ge10819A
Figure 3
EMU Position
To replace the EMU: 1. Remove the PCF by following the instructions in Section 4.1.1 on page 11 or Section 4.2.1 on page 15, depending on PCF model. 2. Disconnect the cable between the EMU and the SHU. 3. Replace the EMU, refer to Replacing EMU. 4. Install the PCF by following the instructions in Section 4.1.2 on page 13 or Section 4.2.2 on page 18, depending on PCF model. 5. Connect the cable between the EMU and the SHU. 6. Perform the concluding routines, see Section 8 on page 43.
124/1543-LZA 701 6001 Uen D | 2016-05-04
25
Replace Power Units
26
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
6
Replace the PDU This section describes how to remove and install a PDU in the cabinet.
Warning! High energy levels are present in this unit. Improper handling of the unit can lead to short circuiting that can result in serious injury. Exercise care when working with this unit.
Do! Use an ESD wrist strap to avoid damage to components mounted on printed board assemblies.
124/1543-LZA 701 6001 Uen D | 2016-05-04
27
Replace Power Units
6.1
Remove the PDU The PDU is shown in Figure 4.
PCR
11
EC Bu
10 PCR PCR
8
8 PCR PCR
9
PCR
8
5
7
4 PCR
6
3 PCR
PC R
10
7
6 PCR P CR
s
11
5
2
4
1
3
2 1
PDU
02 02
Ge1038B
Figure 4
PDU, Model 02 02
To remove the PDU: Switch off the -48 V DC power to the RBS.
1.
ON
OFF
Ge6817E
28
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
2.
Locate the PDU.
Ge9324F
Disconnect the PDU power cable from the PCF.
3.
Ge9464A
Record the positions of the cables that are connected to each PDU output.
4.
Ge7990E
124/1543-LZA 701 6001 Uen D | 2016-05-04
29
Replace Power Units
5.
Disconnect the EC bus cable from the PDU.
PC R
11
us
EC B 11
10
Ge9510A
6.
Using your thumb, press in the metallic latch and disconnect all output cables from the PDU.
6
5 4
3
To disconnect the cable easier, try pushing it forward slightly and then pulling the cable.
2
1
Ge0747C
7.
Remove the two screws holding the PDU.
T30
PCR
11
EC Bus
10 PCR 8 PCR
11
PCR8 PCR PCR PCR PCR
9
8
5
7
4
6
3
5
2 PCR PCR
10
7
6 PCR
4
1
3
2 1
PDU
02 02
Ge9507A
30
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
8.
Pull the PDU out of the slot.
By hand
PCR
11
EC Bus
10 PCR PCR
8
11
PCR8
10
7 PCR PCR PCR
8
5
7
4 PCR
6
3 PCR PCR
9
6
5
2
4
1 PCR
3
2 1
PDU
02 02
Ge9486A
Remove the PDU cover and make a note of the configuration settings on the 11 PCR switches. This information is needed when the new PDU is being installed.
9.
PCR PCR PCR
PCR
PCR
EC Bu
s
11 10
7
9
6 PCR PCR PCR PCR PCR
11
10
8
PCR8 8
5
7
4
6
3
5
2
4
1
3
2 1
PDU
02 02
PCR
11
Ge1038C
Ge7990E
6.2
Install the PDU To install the PDU:
124/1543-LZA 701 6001 Uen D | 2016-05-04
31
Replace Power Units
1.
Remove the cover of the new PDU to enable access to the PCR switches
PCR PCR PCR
PCR PCR
PCR PCR
EC Bu
s
11 10
7
9
6
8
5 PCR PCR PCR
11
10
8
PCR8
7
4
6
3
5
2
4
1
3
2 1
PDU
02 02
PCR
11
Ge1038C
Adjust the PCR switches according to Step 9 in Section 6.1 on page 28.
2.
PCR ON OFF Ge8461B
For more information about PCR switch configurations, see Section 6.3 on page 36. Install the PDU cover.
3.
PCR PCR PCR
PCR PCR PCR PCR PCR PCR PCR
11
s EC Bu
10
8
11
PCR8
10
7
9
6
8
5
7
4
6
3
5
2
4
1
3
2 1
PDU
02 02
11 PCR
Ge1038D
32
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
4.
Remove the brackets on both sides of the old PDU and install them at the corresponding position on the new PDU.
T20
washer
If applicable, remove and install the washers between the bracket and the PDU.
Old PDU
New PDU
Ge9487A
124/1543-LZA 701 6001 Uen D | 2016-05-04
33
Replace Power Units
5.
Slide in the PDU. By hand
PCR
11
EC Bus
10 PCR 8 PCR
11
PCR8 PCR
10
7
9
6 PCR
8
5 PCR PCR PCR
7
4
6
3
5
2 PCR PCR
4
1
3
2 1
PDU
02 02
Ge9495A
6.
Connect the PDU power cable to the PCF.
Ge9493A
Tighten the screws.
7. T30
9.8 Nm
PCR
11
EC Bus
10 PCR 8 PCR
11
PCR8 PCR
9
6 PCR PCR PCR PCR
8
5
7
4
6
3
5
2 PCR PCR
10
7
4
1
3
2 1
PDU
02 02
Ge9508A
34
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
8.
Reconnect all cables as recorded in Step 4 in Section 6.1 on page 28.
6
5 4
For more information about cable connections when adding a PDU, refer to Non-RF Connections.
3
2
1
Ge9511A
Note:
Cables that are connected to one power unit must not overlap other power units. Reconnect the EC bus cable.
9.
PC R
11
us
EC B 11
10
Ge9509A
Switch on the 048 V DC power to the RBS.
10.
ON
OFF
Ge9494A
124/1543-LZA 701 6001 Uen D | 2016-05-04
35
Replace Power Units
11.
PCR
11
Switch on each output where a cable is connected by pressing the buttons. Start with the SCU (port 11) and then do the rest.
us
EC B
0 11 10
PDU 02 02
1
2
3
4
5
6
7
8
9
10
11 EC
Ge9512C
12.
Make sure that the yellow indicator on the PDU is off.
Ge9545A
13.
6.3
Perform the concluding routines, see Section 8 on page 43.
Recommended PCR Switch Configuration If PCR switches are available on the PDU they should be set as recommended or as preferred by the user. When a PCR switch is set in the upper position, the
36
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the PDU
function is enabled (ON), and when a PCR switch is set in the lower position it is disabled (OFF), as shown in Figure 5.
PCR ON OFF PRIO selector
COLD START selector
REMOTE CTRL selector Ge9276A
Figure 5
PCR Switch
For some switchless versions of the PDU, the corresponding setting is done by attribute configuration in the power distribution managed object, more information can be found in the Power Distribution Managed Object. During battery backup, the RBS can use two different voltage levels where the respective selected loads are switched off. Both levels can be set in the Power Distribution Managed Object. All units connected to the PDU ports set to “Prio OFF” (defined as main loads) will be disconnected at the higher voltage level called "Main load disconnect”. At the lower voltage level, "Prio load disconnect", all units connected to the PDU ports set to “Prio ON” (Priority loads) are disconnected, as the battery is disconnected from the power distribution system and the RBS 048 V bus bar. This feature can be used to disconnect less prioritized loads, such as radio units which are not critical during the limited time when the batteries power the node. This means that some services can be cut off earlier than others, for example: •
2G lasting longer than 3G or 4G
•
3G lasting longer than 4G
•
Disconnect second radio in MIMO configurations and so on
A very common usage is to keep the DU and link transmission alive longer than the radio service. One way to prolong the battery backup time for the priority loads, is to use as few loads as possible as priority loads. Another more efficient way is to change
124/1543-LZA 701 6001 Uen D | 2016-05-04
37
Replace Power Units
the main load disconnect level to a higher level, for example the default value 43.0 V can be adjusted to 47 V in some cases. The climate system in the RBS requires that the SCU, and preferably the DU are operational as both control the fans. Hence SCU and DU are set as priority load (Prio ON). When fans stop working the remaining energy in the battery cannot be used as no cooling is available. Table 2 lists the default PCR switch settings. Table 2
38
Default PCR Switch Settings
DC Out to Unit Type
P – Prio
C – Cold Start with Heater
R – Remote C – Cold Start without Control Heater
DU or Baseband
ON
OFF
ON
OFF
SCU
ON
ON
ON
OFF
Other or unused
OFF
OFF
ON
ON
External Equipment
OFF
OFF
ON
OFF
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the SHU
7
Replace the SHU This section describes how to remove and install a Support Hub Unit (SHU) in the cabinet. Note:
The speed of the RBS fans can decrease during replacement of the SHU. It is therefore likely that units inside the cabinet report temperature alarms. It is recommended to replace the SHU during low traffic conditions. To minimize service disturbances due to reduced cooling, replace the SHU as quickly as possible. Allow a maximum of 5 minutes for the SHU replacement.
7.1
Remove the SHU Do! Use an ESD wrist strap to avoid damage to components mounted on printed board assemblies.
To remove the SHU: 1.
Locate the SHU.
Ge9324D
124/1543-LZA 701 6001 Uen D | 2016-05-04
39
Replace Power Units
2.
B
Open and hold one of the retaining latches, and remove the SHU with all cables still connected.
A
1 2 3 4 5 6 7 8
Ge9546A
Hold both the new and old SHU in one hand. Disconnect the cables from the old SHU and reconnect to the new SHU, one at a time.
3.
B
New
A
1 B
2 A
1
3 2
4 3
For more information about cable connections, refer to Non-RF Connections.
5 4
6 5
7 6
8 7 8
Old Ge9547A
4.
Place the SHU in an antistatic bag and reuse the packing material from the spare part.
Ge9325B
7.2
Install the SHU To install the SHU:
40
124/1543-LZA 701 6001 Uen D | 2016-05-04
Replace the SHU
1.
Open and hold one of the retaining latches, and insert the new SHU. B A
1 2 3 4 5 6 7 8
Ge9548A
2.
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform the concluding routines, see Section 8 on page 43.
41
Replace Power Units
42
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform Concluding Routines
8
Perform Concluding Routines Before leaving the site, do the following: Disconnect the ESD wrist strap.
1.
Ge0603D
2.
Collect all tools.
Ge9550A
Switch on the 048 V DC power to the RBS, if applicable.
3.
ON
OFF
Ge9494A
124/1543-LZA 701 6001 Uen D | 2016-05-04
43
Replace Power Units
4.
Ensure that the RBS is operational and that no alarm is active. For more information about optical indicators, refer to Indicators, Buttons, and Switches. Ge9323E
Note:
Reaching the final indicator status can take up to 30 minutes.
5.
Inform the OMC that the work is finished at the site.
Ge6814D
44
124/1543-LZA 701 6001 Uen D | 2016-05-04
Perform Concluding Routines
6.
Close the cabinet. Lift the door to make sure that the door tab enters the slit in the cabinet wall. 2
1 Ge10632A
Push in the top of the door, while securing the door with the key.
7.
Ge10633A
124/1543-LZA 701 6001 Uen D | 2016-05-04
45
Replace Power Units
8.
If applicable, lock the cabinet with a padlock.
Ge9582A
9.
Ge9551A
Follow the procedures for the return and disposal of replacement parts, and the disposal of packing. For information about how to handle faulty equipment, refer to Handling Faulty Equipment. Lock all doors and gates to the site.
10.
Ge9552A
46
124/1543-LZA 701 6001 Uen D | 2016-05-04
Reference List
Reference List
Safety [1]
Personal Health and Safety Information, 124 46-2885
[2]
System Safety Information, 124 46-2886
RBS [3]
Handling Faulty Equipment, 2/1541-LZA 701 6001
[4]
Hardware Maintenance Instruction, 15/1541-LZA 701 6001
[5]
Indicators, Buttons, and Switches, 19/1551-LZA 701 6001
[6]
Non-RF Connections, 4/1551-LZA 701 6001
[7]
Power Distribution Managed Object, 155 54-EN/LZA 785 001/1-V1
[8]
RBS Description, 3/1551-LZA 701 6001
[9]
Replacing Remote Radio Units, for the applicable RRU
[10] Replacing EMU, 99/1543-LZA 701 6001
124/1543-LZA 701 6001 Uen D | 2016-05-04
47
