SMC Networks SMC 5000A, SMC 6000A 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

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

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Content SMA Technologie AG

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

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SMA Technologie AG Content

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

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Content SMA Technologie AG

Page 6 SMC50A_60A-IEN073320 Installation Guide

SMA Technologie AG Notes on this Manual

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.

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The Sunny Mini Central SMA Technologie AG

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.

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.

Principle of a solar power system with a Sunny Mini Central SMC 5000A or SMC 6000A

Distribution

Electricity grid

Solar modules

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Sunny Mini

Central

SMA Technologie AG Safety Instructions

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.

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Safety Instructions SMA Technologie AG

Follow the instructions in the pictograms, signs and labels on each inverter and ensure that they are legible at all times.

General safety rules for working on photovoltaic systems:

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!

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SMA Technologie AG Safety Instructions

3.2 Installer's Responsibilities

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.

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!

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Overview of the Device SMA Technologie AG

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, devicespecific 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

Device type

SUNNY MINI CENTRAL

Photovoltaic string inverter Made in Germany

Model

Serial No.

SMC 6000A 2000165882

Serial number

DC max

DC MPP

DC max

AC nom

AC max

cos

VDE 0126-1-1 (2.06)

outdoor

*2000165882*

600 V

246-600 V

26 A

230 V

50/60 Hz

6000 W

26 A

GÜTEZEICHEN

Solar

Country-specific standard for the grid isolation point according to which the device may be preset

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SMA Technologie AG Overview of the Device

4.2 Dimensions

242 mm

468 mm

613 mm

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Overview of the Device SMA Technologie AG

Wall bracket and rear panel

0,2

7, 0

2,2

48,7

8,5

1,2

2,0

2,6 7, 8 11 ,0 2,2

2,6

1,0

43,3

Holes for wall bracket

Specifications in cm

2,0

1,2

7, 6

8,6

Holes for optional single-use screws as anti-theft protection

0,9 (4 x)

1,2

5,8 2,5

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2,5

5,8

1,2

SMA Technologie AG Overview of the Device

4.3 Electronic Solar Switch (ESS)

The Sunny Mini Central is equipped with the integrated electronic DC loaddisconnecting 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

WARNING! Safe disconnection from the PV generator is only guaranteed after

removal of the Electronic Solar Switch, and of all 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

Electronic Solar Switch handle

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.

Plug

Do not tighten the connector's screws. Otherwise, safe disconnection cannot be guaranteed.

Installation Guide SMC50A_60A-IEN073320 Page 15

Overview of the Device SMA Technologie AG

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:

E F

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SMA Technologie AG Overview of the Device

A Varistors (Page 65)

B Connection terminals for communication (Page 48)

C Socket for communication Piggy-Back (RS232, RS485, radio) (Page 48)

D Jumper for communication (Page 48)

E Sunny Display (Page 54)

F Jumper for fan testing (Page 69)

G Operating status LEDs (Page 55)

H Connection terminals for mains cable (AC) (Page 41)

I Cable duct for mains cable (AC) (Page 41)

J Flat connection for grounding the cable shield for RS232 and RS485

communication (Page 48)

K Cable feed-throughs for communication (Page 48)

L Connection plug for ESS (Page 15)

M PV input plug (DC) (Page 28)

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Installation SMA Technologie AG

5 Installation

5.1 Selecting an Installation Location

No. Checkpoint Control

Location

1 The 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.

613 m m

63 kg

2 The 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

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SMA Technologie AG Installation

No. Checkpoint Control

3 If 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!

4 The Sunny Mini Central is accessible at any time (e.g. not mounted

on roofs that are difficult to access).

5 The Sunny Mini Central can be removed from the installation

location easily (by two people), in spite of its weight of 63 kg.

6 The Sunny Mini Central is not installed in areas

where highly flammable materials are stored or in potentially explosive areas.

7 The Sunny Mini Central is not exposed to direct sunlight, in order

to avoid yield losses of the PV system.

8 The ambient temperature is always between -25 °C and +60 °C.

9 The 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.

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!

Installation Guide SMC50A_60A-IEN073320 Page 19

Installation SMA Technologie AG

No. Checkpoint Control

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.

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.

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SMA Technologie AG Installation

5.2 Required Tools and Materials

Number Tool/material Purpose

1 drill with a suitable drill bit drilling the holes for the wall bracket

2 - 4 wall anchors with a diameter of

10 mm (for attachment to a concrete or stone wall, for example)

2 - 4 8 mm x 60 mm hexagon bolts to

DIN 571 standard, stainless steel type (for attachment to a concrete or stone wall, for example)

1 appropriate spanner attaching the wall bracket to the wall

1 hexagon (allen) key (5 mm) attaching the Sunny Mini Central to

1 steel bar with max. diameter of

30 mm

Optional for anti-theft protection:

2 - 4 wall anchors with a diameter of

10 mm (for attachment to a concrete or stone wall, for example)

2 - 4 corresponding single-use screw

systems (8 mm)

1 suitable screwdriver securing the single-use screws for

insertion in the holes in the wall for the wall bracket

attaching the wall bracket to the wall

the wall bracket

poss. for carrying the Sunny Mini Central (slide through the rear housing opening)

insert in the holes in the wall for the anti-theft screws (if desired)

anti-theft protection of the Sunny Mini Central (if required)

anti-theft protection (if desired)

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Installation SMA Technologie AG

5.3 Mounting the Sunny Mini Central

Only use the provided wall bracket for installation!

When mounting the device, be sure to take into account the weight of the Sunny Mini Central of 63 kg!

Step Instruction

Mounting the Wall Bracket

1 For mounting the wall bracket, use two to four of the six holes in the middle.

2 Mark the positions of the drill holes by using the wall bracket as a drilling

template (see Page 14 for a sample).

3 Drill the holes, insert the wall anchors

and secure the wall bracket with screws using corresponding washers.

Recommended bolts: 8 mm x 60 mm hexagon bolts

to DIN 571 standard, stainless steel type

Recommended wall

SX10

anchors:

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SMA Technologie AG Installation

Step Instruction

Mounting the Sunny Mini Central

4 When transporting and installing the

Sunny Mini Central, use the ergonomic handles at the top and bottom at the

sides of the Sunny Mini Central (A), or the housing opening, for example by inserting a steel bar (B) (diameter max. 30 mm).

5 Hang the Sunny Mini Central using the

mounting holes on the rear face into the wall bracket.

Take care to ensure that the Sunny Mini Central locks audibly into place in the wall bracket.

6 Fix the Sunny Mini Central to the wall

bracket using the two enclosed M6 x 8 mm bolts on both sides of the Sunny Mini Central.

Fasten the bolts so that they are handtight!

7 Make sure that the Sunny Mini Central is positioned securely on the bracket.

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Installation SMA Technologie AG

Step Instruction

8 Close the recessed grips with the

handle covers provided in the accessories kit.

They are required to adequately prevent insects entering the unit!

If required, new handle covers can be ordered from SMA (contact: see Page 92).

Optional Anti-theft Protection

9 To protect the Sunny Mini Central

against theft, the rear face can be secured to the wall at the bottom using 2 so-called single-use bolts. The other two holes are spare, in case you take down the Sunny Mini Central and then mount it again, and the screw stumps from the first single-use bolts still protrude from the wall.

The exact position of the holes can be seen in the illustration of the rear panel in section 4.2 "Dimensions" (Page 13).

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SMA Technologie AG Electrical Connection

6 Electrical Connection

6.1 Required Tools and Materials

Number Tool/material Purpose

2-8 PV plug connectors for the connecting cables of the solar

modules for connection to the Sunny Mini Central

1 multimeter with DC input voltage

range up to at least 600 V

1 hexagon (allen) key (5 mm) opening and closing the housing

1 cable with external diameter

between 11 and 25 mm

1 stripping pliers stripping the AC cable

1 flathead screwdriver, 1 x 6 mm

or Phillips screwdriver PZ2 Pozidrive

1 terminal clamp (provided in

accessories kit)

1 hexagon socket screw

(M6x16, provided in accessories kit)

1 washer

(M6, provided in accessories kit)

1 grounding cable with a cross-section

between 4 and 10 mm²

1 line circuit breaker

(see Page 44 for rating)

checking the connecting wires of the solar modules for correct polarity and ensuring that the maximum input voltage of the Sunny Mini Central is not exceeded

cover and securing the additional grounding terminal to the housing, if required

AC connecting cable

using the screw clamps for the AC connection

additional grounding of the housing (if necessary)

power circuit fuse

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Electrical Connection SMA Technologie AG

6.2 Connection Procedure

When connecting the unit to the power supply, do not deviate from the sequence described here!

The following figure shows the assignment of the individual housing ducts on the base of the Sunny Mini Central.

ABA C D E

A Plug connectors for connecting the PV strings

B Plug connector for connecting the ESS (Electronic Solar Switch)

C Cable feed-throughs for optional communication via RS232, RS485 or radio

(PG16)

D Cable feed-through for grid connection (AC) (11 mm - 25 mm)

E is not used

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SMA Technologie AG Electrical Connection

6.3 Connection of the DC Input

6.3.1 Requirements

For connecting the DC input, the following requirements must be satisfied:

1. The connected strings must consist of modules of the same type and number and should have an identical orientation and tilt.

2. The connecting wires of the solar modules must be equipped with plug connectors to allow the eight DC plug connectors of the Sunny Mini Central to be connected to it.

A pre-assembled set for connecting the free cable ends from a string is available as an optional accessory from SMA:

Connection set Order code Maximum

flow current

Multi-Contact 3 mm SWR-MC 21.0 A

Multi-Contact 4 mm MC-SET 30.0 A

Tyco TYCO-SET 30.0 A

3. Make sure that the following limit values at the DC input of the Sunny Mini Central are not exceeded:

Device Maximum

input voltage

SMC 5000A 600 V (DC) 26.0 A (DC)

SMC 6000A 600 V (DC) 26.0 A (DC)

4. Check the system design and the string size using the design program Sunny Design which is available to download free at www.SMA.de.

Installation Guide SMC50A_60A-IEN073320 Page 27

Maximum input current

Electrical Connection SMA Technologie AG

6.3.2 Connection of PV Strings

NOTICE! The AC side of the Sunny Mini Central must be disconnected from the grid before you connect the PV strings to the Sunny Mini Central!

To connect up the PV strings, follow these steps:

Step Instruction

1 Remove the Electronic Solar Switch on the

underside of the Sunny Mini Central.

2 Make sure the connecting cables of the

solar modules have the right polarity and do not exceed the maximum input voltage of the Sunny Mini Central (see section 6.3.1 "Requirements" (Page 27)).

WARNING! Dangerously high voltages may be present. Danger of death! Make sure that you only use measuring devices with a DC input voltage range up to at least 600 V!

3 Taking one DC plug connector at a time, measure the direct current voltage

between one DC plug connector of a string and ground potential. If the measured voltages are constant and their total is roughly the same as

the open circuit voltage of the string, then there is a ground fault in this string. Its approximate location can be deduced from the relationships between the voltages.

WARNING! Do not connect strings to the Sunny Mini Central that contain a ground fault until you have fixed the ground fault in these strings!

5 Repeat step 2 for each string.

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SMA Technologie AG Electrical Connection

Step Instruction

6 Connect up the faultless PV generator strings

as indicated on the right.

7 Close the unused DC input sockets with the caps included in the delivery.

8 Reinsert the handle of the Electronic Solar

Switch in the socket on the underside of the Sunny Mini Central.

The Electronic Solar Switch can be damaged if it has not been attached properly. The handle must be firmly attached to the Electronic Solar Switch's socket, and rest against the housing. Check that the handle is positioned correctly before recommissioning the inverter.

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