SMA Solar Technology Sunny Mini Central SMC 5000A User manual

Sunny Mini Central
SMC 5000A / 6000A
Inverter for three-phase grid feeding
PV plants
Installation Guide Version 2.0 SMC50A_60A-IEN073320
IME-SMC50A_60A

SMA Technologie AG Content
Installation Guide SMC50A_60A-IEN073320 Page 3
Content
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . 7
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Target Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Explanation of the Symbols Used . . . . . . . . . . . . . . . 7
2 The Sunny Mini Central . . . . . . . . . . . . . . . . . . . . 8
2.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Handling of the Sunny Mini Central . . . . . . . . . . . . . 9
3.2 Installer's Responsibilities . . . . . . . . . . . . . . . . . . . . 11
4 Overview of the Device . . . . . . . . . . . . . . . . . . . 12
4.1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Electronic Solar Switch (ESS) . . . . . . . . . . . . . . . . . 15
4.4 Interior View . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 Selecting an Installation Location . . . . . . . . . . . . . . 18
5.2 Required Tools and Materials . . . . . . . . . . . . . . . . 21
5.3 Mounting the Sunny Mini Central. . . . . . . . . . . . . . 22
6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . 25
6.1 Required Tools and Materials . . . . . . . . . . . . . . . . 25
6.2 Connection Procedure. . . . . . . . . . . . . . . . . . . . . . 26
6.3 Connection of the DC Input . . . . . . . . . . . . . . . . . . 27
6.3.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.3.2 Connection of PV Strings. . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
6.3.3 Reverse Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.4 Connecting the AC Output . . . . . . . . . . . . . . . . . . 34
6.4.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Content SMA Technologie AG
Page 4 SMC50A_60A-IEN073320 Installation Guide
6.4.2 Connecting the AC Output . . . . . . . . . . . . . . . . . . . . . . . . . . .41
6.4.3 The Line Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
7 The Communication Interface. . . . . . . . . . . . . . . 48
7.1 Connecting RS232, RS485, Sunny Beam . . . . . . . . 49
7.1.1 Jumper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
8 Commissioning the Sunny Mini Central . . . . . . . 51
8.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.1.1 Setting the Language of the Sunny Display . . . . . . . . . . . . . . . .54
8.2 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9 Hand-over to the Operator . . . . . . . . . . . . . . . . 57
10 Opening and Closing the Sunny Mini Central . . 58
10.1 Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2 Opening of the Sunny Mini Central . . . . . . . . . . . . 59
10.3 Closing of the Sunny Mini Central . . . . . . . . . . . . . 60
11 Troubleshooting / Problem Solving . . . . . . . . . . 62
11.1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
11.2 The red LED is Continuously on . . . . . . . . . . . . . . . 63
11.2.1 Ground Fault Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
11.2.2 Checking the Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
12 Maintenance and Cleaning . . . . . . . . . . . . . . . . 67
12.1 Checking Heat Dissipation. . . . . . . . . . . . . . . . . . . 67
12.1.1 Cleaning the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
12.1.2 Checking the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
12.1.3 Cleaning the Handle Covers . . . . . . . . . . . . . . . . . . . . . . . . . .71
12.2 Inspection of the Electronic Solar Switch . . . . . . . . . 72

SMA Technologie AG Content
Installation Guide SMC50A_60A-IEN073320 Page 5
13 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . 73
13.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
13.2 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
13.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
13.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
14 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . 75
14.1 Sunny Mini Central SMC 5000A . . . . . . . . . . . . . . 75
14.2 Sunny Mini Central SMC 6000A . . . . . . . . . . . . . . 78
14.3 General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
14.4 Sunny Mini Central Operating Parameters . . . . . . . 82
14.4.1 Explanation of the Operating Parameters . . . . . . . . . . . . . . . . .82
14.4.2 Parameter Settings for Germany . . . . . . . . . . . . . . . . . . . . . . .87
14.4.3 Country-specific Parameter Settings . . . . . . . . . . . . . . . . . . . . .89
14.4.4 Fixed Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
15 Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Content SMA Technologie AG
Page 6 SMC50A_60A-IEN073320 Installation Guide

SMA Technologie AG Notes on this Manual
Installation Guide SMC50A_60A-IEN073320 Page 7
1 Notes on this Manual
1.1 Validity
This installation guide covers the correct installation and commissioning of type Sunny
Mini Central SMC 5000A and SMC 6000A SMA inverters.
1.2 Target Group
Only trained electricians approved by the responsible energy supply company may
install and commission the inverters. The instructions assume that you, the installer, are
familiar with electrical installations and know the corresponding rules and regulations.
1.3 Explanation of the Symbols Used
This symbol indicates a fact which, if ignored, could result in damage to
components or personal hazard. Please read these sections especially
carefully.
This symbol indicates a fact that is important for optimum operation of the product.
Read these sections carefully to ensure this.
This symbol indicates an example.

The Sunny Mini Central SMA Technologie AG
Page 8 SMC50A_60A-IEN073320 Installation Guide
2 The Sunny Mini Central
2.1 Appropriate Usage
The Sunny Mini Central is a photovoltaic inverter and serves to feed solar energy from
solar modules converted using photovoltaics into a low voltage grid with a nominal
voltage of 220 to 240 V and 50 Hz or 60 Hz.
Principle of a solar power system with a Sunny Mini Central SMC
5000A or SMC 6000A
Do not use the Sunny Mini Central for purposes other than those described
here. Alternative uses, modifications to the inverter as well as installing
components not recommended or sold by SMA void the warranty and
operating license.
L1
L2
L3
Sunny Mini
Central
Solar modules
Electricity grid
Distribution

SMA Technologie AG Safety Instructions
Installation Guide SMC50A_60A-IEN073320 Page 9
3 Safety Instructions
3.1 Handling of the Sunny Mini Central
All work on and in the Sunny Mini Central must be carried out by a
qualified electrician. The electrician must be approved by the local energy
supplier.
Open and close the Sunny Mini Central only as described in section 10
"Opening and Closing the Sunny Mini Central" (Page 58) and follow the
safety instructions listed there.
The Sunny Mini Central weighs approximately 63 kg. Two people must
carry the unit or a suitable transport trolley must be used. Safety boots
must be worn.
The temperature of individual parts of the housing and of components
inside the Sunny Mini Central can reach more than 60 °C. Touching these
parts could result in severe burns.
Once the handle of the Electronic Solar Switch has been pulled out, the
Sunny Mini Central provides protection rating IP21. Thus it is no longer
protected against water seepage and foreign objects.
Check the system design using the Sunny Design program (www.SMA.de)
or by calling the Sunny Boy Serviceline before installing the Sunny Mini
Central. Overvoltages lead to the destruction of the Sunny Mini Central,
thereby voiding all warranty claims.
Avoid contact with the PV modules when they are running, as a minimal
displacement current could flow and cause a secondary accident due to
shock. Therefore, maintenance work may only be performed on the solar
generator when it is disconnected. Disconnecting the Sunny Mini Central
from the grid is not sufficient.
In addition, touchable conducting parts such as the framework of the PV
generator should be grounded.

Safety Instructions SMA Technologie AG
Page 10 SMC50A_60A-IEN073320 Installation Guide
General safety rules for working on photovoltaic systems:
Follow the instructions in the pictograms, signs and labels on each inverter
and ensure that they are legible at all times.
1. Disconnecting the device
Before you start to work on the unit, disconnect all wires which could
carry voltage to the area you are working on!
2. Protect against reenergizing
To prevent the device from being reenergized ensure that you block
or lock it!
3. Test each unit to ensure that all voltages have been removed
Use a voltmeter to ensure that the unit is completely deenergized!
Ensure that all poles of the unit are free of voltage!

SMA Technologie AG Safety Instructions
Installation Guide SMC50A_60A-IEN073320 Page 11
3.2 Installer's Responsibilities
This installation guide, the operating manual and the documentation of installed
components must be kept in the immediate vicinity of the inverter and must be available
to installation, operation, maintenance and service staff at all times.
The inverter should only be used when it is safe to do so. All safety features must be
accessible at all times and their correct operation should be regularly tested.
Read this installation guide carefully and be sure to observe and understand all safety
regulations when installing and commissioning the system. You must also observe and
understand all connection requirements of the local energy supplier and all applicable
national codes and standards for installation of this equipment.
The information regarding operational safety refers to the regulations of the European
Union valid at the time the inverter was produced. The installer is obliged to make sure
that the mentioned safety measures comply with the regulations valid at the time and to
observe new regulations when installing the inverter. Outside the European Union, the
laws on occupational safety applicable in the deployment location of the device and
the respective national requirements must be adhered to.
In addition to the work safety measures in this installation guide, the general safety and
accident prevention regulations which apply where the inverter is installed and the valid
environmental protection regulations must be observed and followed.
Follow all instructions in this installation guide completely and without restrictions!
Each person working on an electrical device is responsible for the safety
of all persons involved and for the safety of the device.
Be sure to observe all standards and regulations applicable to the
installation and site.

Overview of the Device SMA Technologie AG
Page 12 SMC50A_60A-IEN073320 Installation Guide
4 Overview of the Device
4.1 Identification
You can identify the Sunny Mini Central with the aid of the name plate (see figure
below). The name plate is found on the right-hand side of the housing (when viewed
from the front). It contains information regarding the device type, serial number, device-
specific key data, the CE mark and SMA contact information.
The following is an example of a Sunny Mini Central SMC 6000A name plate:
SMA Technologie AG
www.SMA.de
SUNNY MINI CENTRAL
Photovoltaic string inverter Made in Germany
Model Serial No.
SMC 6000A 2000165882
V
DC max
V
DC MPP
I
DC max
V
AC nom
f
AC nom
P
AC nom
I
AC max
outdoor
600 V
246-600 V
26 A
230 V
50/60 Hz
6000 W
26 A
1
GÜTEZEICHEN
Solar
*2000165882*
VDE 0126-1-1 (2.06)
cos
j
Device type Serial number
Country-specific
standard for the
grid isolation point
according to which
the device may be
preset

SMA Technologie AG Overview of the Device
Installation Guide SMC50A_60A-IEN073320 Page 13
4.2 Dimensions
242 mm
613 mm
468 mm

Overview of the Device SMA Technologie AG
Page 14 SMC50A_60A-IEN073320 Installation Guide
Wall bracket and rear panel
8,5 2,6 2,6 7,8 11, 0 2,2 8,6
7,6
43,3
2,0
1,2
1,0 1,2
2,0
2,2
7,0
48,7
0,2
1,2
5,8 2,5
1,2
5,8
2,5
0,9 (4 x)
Specifications in cm
Holes for optional single-use
screws as anti-theft protection
Holes for wall bracket

SMA Technologie AG Overview of the Device
Installation Guide SMC50A_60A-IEN073320 Page 15
4.3 Electronic Solar Switch (ESS)
The Sunny Mini Central is equipped with the integrated electronic DC load-
disconnecting switch ESS. This reliably prevents the arcing that usually occurs when
disconnecting the inverter from the PV generator, which can cause personal injury and
may damage the inverter connections. To access the DC input plugs in order to safely
disconnect the PV generator from the inverter, you only need to pull on a grip handle
on the base of the inverter.
Disconnecting the inverter thus becomes a three-step process:
1. Disconnecting the AC side
2. Pulling off the Electronic Solar Switch handle
3. Disconnecting the DC plug connectors
Assembly
The Electronic Solar Switch consists of a handle on the
underside of the inverter, and an assembly inside the
inverter.
A handle is mounted on the underside of the inverter which
covers the PV generator's connectors.
A plug is inside the handle. The Electronic
Solar Switch's connector is only visible
once the handle has been pulled.
The connector is fitted in the handle as a
floating connector, so that the handle
does not catch when being pulled from
the inverter.
WARNING!
Safe disconnection from the PV generator is only guaranteed after
removal of the Electronic Solar Switch, and of all DC plug connectors.
Do not tighten the connector's screws. Otherwise, safe
disconnection cannot be guaranteed.
Electronic Solar Switch handle
Plug

Overview of the Device SMA Technologie AG
Page 16 SMC50A_60A-IEN073320 Installation Guide
4.4 Interior View
The following diagram gives a schematic overview of the various components and
connection points inside the Sunny Mini Central SMC 5000A and SMC 6000A with
the cover removed:
A
C
B
DE F
G
H
MKI
LJ

SMA Technologie AG Overview of the Device
Installation Guide SMC50A_60A-IEN073320 Page 17
AVaristors (Page 65)
BConnection terminals for communication (Page 48)
CSocket for communication Piggy-Back (RS232, RS485, radio) (Page 48)
DJumper for communication (Page 48)
ESunny Display (Page 54)
FJumper for fan testing (Page 69)
GOperating status LEDs (Page 55)
HConnection terminals for mains cable (AC) (Page 41)
ICable duct for mains cable (AC) (Page 41)
JFlat connection for grounding the cable shield for RS232 and RS485
communication (Page 48)
KCable feed-throughs for communication (Page 48)
LConnection plug for ESS (Page 15)
MPV input plug (DC) (Page 28)

Installation SMA Technologie AG
Page 18 SMC50A_60A-IEN073320 Installation Guide
5 Installation
5.1 Selecting an Installation Location
No. Checkpoint Control
Location
1The installation location and
method of installation is suitable for
the weight of approximately 63 kg
and the dimensions of
468 mm x 613 mm x 242 mm
(width x height x depth) of the
Sunny Mini Central.
2The following minimum clearances to walls, other devices or
objects must be observed to guarantee sufficient heat dissipation.
Direction Minimum
clearance
Sides 30 cm
Top 30 cm
Underside 50 cm
Front 5 cm
468mm
242mm
613 mm
63 kg

SMA Technologie AG Installation
Installation Guide SMC50A_60A-IEN073320 Page 19
3If several Sunny Mini Central units are installed in areas where
high ambient temperatures are to be expected, the individual
Sunny Mini Central units must be far enough apart to ensure that
the individual Sunny Mini Central units do not intake the cooling
air of the neighboring unit.
If necessary, increase the clearances and ensure that the device is
sufficiently ventilated!
4The Sunny Mini Central is accessible at any time (e.g. not mounted
on roofs that are difficult to access).
5The Sunny Mini Central can be removed from the installation
location easily (by two people), in spite of its weight of 63 kg.
6The Sunny Mini Central is not installed in areas
where highly flammable materials are stored
or in potentially explosive areas.
7The Sunny Mini Central is not exposed to direct sunlight, in order
to avoid yield losses of the PV system.
8The ambient temperature is always between -25 °C and +60 °C.
9The Sunny Mini Central must be mounted such
that the inverter cannot be touched
inadvertently!
The temperature of individual parts of the
housing and of components inside the Sunny
Mini Central can reach more than 60 °C.
Touching these parts could result in severe
burns.
10 The Sunny Mini Central is installed in such a
way that it is not possible (e.g. for children) to
unintentionally unplug the DC plug connector.
Unintentionally pulling out the DC plug
connectors under load can damage the plugs
and could result in personal injury!
No. Checkpoint Control

Installation SMA Technologie AG
Page 20 SMC50A_60A-IEN073320 Installation Guide
Position
11 The Sunny Mini Central is mounted vertically on a wall, or if it is
absolutely necessary, tilted back to an angle of max. 45°.
12 The Sunny Mini Central is installed so that it is not slanting
forward.
13 The Sunny Mini Central is not installed horizontally.
14 The Sunny Mini Central should ideally be installed at eye level to
allow operating conditions to be read at all times.
Foundation
15 The Sunny Mini Central is mounted on a solid surface.
16 The Sunny Mini Central is not mounted on
flammable construction materials.
17 In a living area, the Sunny Mini Central
should not be mounted on plasterboard walls
or alike as otherwise audible vibrations are
likely to result.
The Sunny Mini Central makes noises when
in use, which can be a disturbance in a living
area.
No. Checkpoint Control