SMA SB3.0-1SP-US-40 User manual

SB3.0-1SP-US-40 / SB3.8-1SP-US-40 /
SB5.0-1SP-US-40 / SB6.0-1SP-US-40 /
SB7.0-1SP-US-40 / SB7.7-1SP-US-40
Replacing a Defective Power Unit
SB30-77-1SP-US-40-AT-PU-SG-xx-11 | 102509-00.01 | Version 1.1
ENGLISH Service Manual ESPAÑOL Instrucciones de servicio técnico
FRANÇAIS Manuel de service

Table of Contents
1 Information on this Document................................................. 3
1.1 Validity ............................................................................................... 3
1.2 Target group ...................................................................................... 3
1.3 Symbols.............................................................................................. 3
2 Safety Information ................................................................... 4
3 Overview of the Enclosure Parts............................................. 5
4 Disconnecting the Inverter from Voltage Sources................. 6
5 Disassembling the Defective Power Unit................................ 8
6 Mounting the New Power Unit ............................................... 12
7 Packaging the Defective Power Unit for Pick-Up .................. 15
8 Contact ...................................................................................... 16
Table of Contents SMA Solar Technology America LLC
Service ManualSB30-77-1SP-US-40-AT-PU-SG-xx-112
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1 Information on this Document
1.1 Validity
This document describes how to replace defective components. This document supplements the
documents that are enclosed with each product and does not replace any locally applicable
standards or directives. Read and observe all documents supplied with the product.
This document is valid for the following device types:
• SB3.0-1SP-US-40 (Sunny Boy 3.0-US)
• SB3.8-1SP-US-40 (Sunny Boy 3.8-US)
• SB5.0-1SP-US-40 (Sunny Boy 5.0-US)
• SB6.0-1SP-US-40 (Sunny Boy 6.0-US)
• SB7.0-1SP-US-40 (Sunny Boy 7.0-US)
• SB7.7-1SP-US-40 (Sunny Boy 7.7-US)
1.2 Target group
The tasks described in this document must only be performed by qualified persons. Qualified
persons must have the following skills:
• Knowledge of how an inverter works and is operated
• Training in how to deal with the dangers and risks associated with installing and using
electrical devices and installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of the applicable standards and directives
• Knowledge of and compliance with this document and all safety information
1.3 Symbols
Symbol Explanation
Information that is important for a specific topic or goal, but is not
safety-relevant
Indicates a requirement for meeting a specific goal
Desired result
A problem that might occur
1 Information on this Document
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2 Safety Information
This section contains safety information that must be observed at all times when working on or with
the product.
To prevent personal injury and property damage and to ensure long-term operation of the product,
read this section carefully and observe all safety information at all times.
Danger to life due to high voltages in the inverter
When exposed to sunlight, the PV array generates dangerous DC voltage which is present in the
DC conductors and the live components of the inverter. Touching the DC conductors or the live
components can lead to lethal electric shocks.
• All work on the inverter must be carried out by qualified persons only. Qualified persons
must at least have the following skills:
– Knowledge of how SMA inverters work and are operated
– Training in how to deal with the dangers and risks associated with installing, repairing
and using electrical devices and installations
– Knowledge of how to safely disconnect SMA inverters
– Knowledge of all applicable laws, standards and directives
• Prior to performing any work on the inverter, disconnect it from all voltage sources as
described in this document (see Section4, page6).
• After disconnecting the inverter from voltage sources, a certain waiting time must be
observed to allow the residual voltages in the DC link of the inverter or in the charging
circuit of the capacitors to discharge. This waiting time is at least ten minutes.
• Do not touch any live components of the inverter.
Risk of burns from hot surfaces
The surface of the inverter can get very hot. Touching the surface can result in burns.
• Mount the inverter in such a way that it cannot be touched inadvertently.
• Do not touch hot surfaces.
• Wait 30 minutes for the surface to cool sufficiently.
• Observe the safety messages on the inverter.
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through
electrostatic discharge.
• Ground yourself before touching any component.
2 Safety Information SMA Solar Technology America LLC
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3 Overview of the Enclosure Parts
Figure 1 : Overview of the enclosure parts
Position Designation
A Power Unit
B Connection Unit
3 Overview of the Enclosure Parts
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4 Disconnecting the Inverter from Voltage Sources
Prior to performing any work on the inverter, always disconnect it from all voltage sources as
described in this section. Always adhere to the prescribed sequence.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range of 600 V or higher.
1. Disconnect the AC circuit breaker and secure it against reconnection.
2. Set the DC load-break switch of the inverter to
O.
3. Secure the DC load-break switch against
reconnection using a suitable padlock.
4. If the multifunction relay is used, switch off any supply voltage to the load.
4 Disconnecting the Inverter from Voltage Sources SMA Solar Technology America LLC
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5.
Danger to life due to high voltages on the DC-in connecting terminal plate
When exposed to sunlight, the PV array generates dangerous direct voltage. Touching the
DC conductors can lead to lethal electric shocks. Even if the DC load-break switch of the
inverter is in the O, position, there will be dangerous direct voltage present in the DC
conductors and on the DC-in connecting terminal plate in the Connection Unit.
• If an external DC disconnecting switch is available, open the external DC disconnecting
switch.
• If there is no external DC disconnecting switch, cover the PV modules with opaque
material (e.g. foil).
• Ensure that there is no voltage on the DC conductors of the PV array.
• Wait five minutes before working on the inverter.
• Leave the DC-in connecting terminal plate plugged into the Connection Unit and only
touch it on the black enclosure.
6. Wait until the LEDs have gone out.
7. Unscrew all six screws of the enclosure lid of the Connection Unit with a Torx screwdriver (TX
25) and remove the enclosure lid carefully toward the front. While doing so, note that the
display assembly on the enclosure lid and the communication assembly in the inverter are
connected via a ribbon cable.
8. Disconnect the display cable from the socket on
the communication assembly.
9. Use a current clamp to ensure that no current is present in the DC conductors.
10. Ensure there is no voltage on the AC-out connecting terminal plate between L1 and N and L2
and N using a suitable measuring device. To do this, stick the test probe (max. diameter: 2mm
(0.078in)) in each rectangular opening of the terminal.
11. Ensure there is no voltage on the AC-out connecting terminal plate between L1 and the
equipment grounding conductor and L2 and the equipment grounding conductor using a
suitable measuring device. To do this, stick the test probe (max. diameter: 2mm (0.078in)) in
each rectangular opening of the terminal.
4 Disconnecting the Inverter from Voltage Sources
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5 Disassembling the Defective Power Unit
Prior to disassembling the defective Power Unit, all connections between the Power Unit and the
Connection Unit must be severed. Only then can the Power Unit be removed from the Connection
Unit. All conductors connected to the communication assembly can remain plugged in and do not
need to be removed to disassemble the Power Unit.
Damage to the enclosure parts due to frost
• Do not disassemble the Power Unit unless the ambient temperature is at least 0°C (32°F)
and conditions are frost-free.
Damage to the Connection Unit due to moisture ingress
If no new Power Unit is immediately available, do not disassemble the Power Unit. As soon as the
Power Unit is disassembled, moisture can penetrate the Connection Unit.
• Only disassemble the defective Power Unit once the new Power Unit is ready and
available.
Procedure:
1.
Danger to life due to high voltages
• Disconnect the inverter from all voltage sources (see Section4, page6).
2. Remove the connecting terminal plate with the
connected DC conductors from slot DC-in. To do
this, unscrew the screws using a flat-blade
screwdriver (blade width: 3.5mm (0.14in)) and
pull the connecting terminal plate out of the slot.
During this operation, only touch the connecting
terminal plate on the black enclosure.
5 Disassembling the Defective Power Unit SMA Solar Technology America LLC
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3. Remove the connecting terminal plate with the
connected AC conductors from slot AC-out. To
do this, unscrew the screws using a flat-blade
screwdriver (blade width: 3.5mm (0.14in)) and
pull the connecting terminal plate out of the slot.
4. If there is a switch and an outlet for secure
power supply operation connected, remove the
connecting terminal plate with the connected
cable from the SPS slot. To do this, unscrew the
screws using a flat-blade screwdriver (blade
width: 3.5mm (0.14in)) and pull the connecting
terminal plate out of the slot.
5. Pull the ribbon cable connecting the
communication assembly to the Power Unit out
of the communication assembly.
6. Lead the ribbon cable with plug back to the
COM slot in the Power Unit and insert the plug
into the slot until it is flush with the black plastic
of the slot.
5 Disassembling the Defective Power Unit
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7. If the inverter is fitted with a padlock for theft
protection, open the padlock and remove it.
8. Using a Torx screwdriver (TX 25), unscrew the
screw M5x60 which fastens the inverter to the
wall mounting bracket.
9. Release the two screws on the right and left side
of the Power Unit with a Torx screwdriver
(TX25) and retain together with the washers for
later use.
10. Lift to remove the Power Unit out of the wall
mounting bracket, thus separating the Power
Unit from the Connection Unit.
5 Disassembling the Defective Power Unit SMA Solar Technology America LLC
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