Maintenance Manual

SUNNY CENTRAL 500CP XT / 630CP XT /

720CP XT / 760CP XT / 800CP XT / 850CP XT /
900CP XT / 1000CP XT

ENGLISH SCCPXT-E7-WA-en-37 | 98-107200.05 | Version 3.7

Legal Provisions SMA Solar Technology AG

Legal Provisions
The information contained in these documents is the property of SMA Solar Technology AG. No part of this document
may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic,
mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA Solar Technology AG.
Internal reproduction used solely for the purpose of product evaluation or other proper use is allowed and does not
require prior approval.
SMA Solar Technology AG makes no representations or warranties, express or implied, with respect to this
documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied
warranties of utility, merchantability, or fitness for any particular purpose. All such representations or warranties are
expressly disclaimed. Neither SMA Solar Technology AG nor its distributors or dealers shall be liable for any indirect,
incidental, or consequential damages under any circumstances.
The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may
not apply.
Specifications are subject to change without notice. Every attempt has been made to make this document complete,
accurate and up-to-date. Readers are cautioned, however, that product improvements and field usage experience may
cause SMA Solar Technology AG to make changes to these specifications without advance notice or per contract
provisions. SMA Solar Technology AG shall not be responsible for any damages, including indirect, incidental or
consequential damages, caused by reliance on the material presented, including, but not limited to, omissions,
typographical errors, arithmetical errors or listing errors in the content material.

SMA Warranty
You can download the current warranty conditions from the Internet at www.SMA-Solar.com.

Trademarks
All trademarks are recognized, even if not explicitly identified as such. Missing designations do not mean that a
product or brand is not a registered trademark.
SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. +49 561 9522-0
Fax +49 561 9522-100
www.SMA.de
Email: info@SMA.de
As of: 6/18/2020
Copyright © 2020 SMA Solar Technology AG. All rights reserved.

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SMA Solar Technology AG Table of Contents

Table of Contents
1 Information on this Document..................................................................................................... 6
1.1 Validity ............................................................................................................................................................. 6
1.2 Target Group ................................................................................................................................................... 6
1.3 Levels of Warning Messages.......................................................................................................................... 6
1.4 Symbols in the Document................................................................................................................................ 7
1.5 Typographical Elements in the Document...................................................................................................... 7
1.6 Designations in the Document ........................................................................................................................ 7
1.7 Additional Information..................................................................................................................................... 7
2 Safety ............................................................................................................................................ 9
2.1 Intended Use.................................................................................................................................................... 9
2.2 Safety Information ........................................................................................................................................... 10
2.3 Cyber Security ................................................................................................................................................. 13
2.4 Personal Protective Equipment ........................................................................................................................ 13
3 Product Overview ........................................................................................................................ 14
3.1 Design of the Inverter ...................................................................................................................................... 14
3.2 Devices of the Inverter..................................................................................................................................... 14
3.3 Operating and Display Elements.................................................................................................................... 15
3.3.1 Function of the Switches .................................................................................................................................. 15
3.3.1.1 Key Switch....................................................................................................................................................... 15
3.3.1.2 AC Disconnection Unit.................................................................................................................................... 16
3.3.1.3 DC Switchgear ................................................................................................................................................ 16
3.3.2 Touch Display................................................................................................................................................... 17
3.3.2.1 Design.............................................................................................................................................................. 17
3.3.2.2 Explanation of Symbols .................................................................................................................................. 17
3.3.3 LEDs of the SC-COM ....................................................................................................................................... 21
3.3.3.1 LEDs on the Enclosure..................................................................................................................................... 21
3.3.3.2 LEDs on the Network Port............................................................................................................................... 22
3.3.3.3 LEDs on the Optical Fiber Terminals .............................................................................................................. 23
3.3.4 User Interface ................................................................................................................................................... 24
3.3.4.1 Design of the User Interface........................................................................................................................... 24
3.3.4.2 Tree View and Device View ........................................................................................................................... 24
3.3.4.3 Status Symbols ................................................................................................................................................ 25
3.4 Symbols on the Product................................................................................................................................... 25
4 Disconnecting and Reconnecting ................................................................................................ 26
4.1 Safety When Disconnecting and Reconnecting Voltage Sources ................................................................ 26
4.2 Disconnecting the Inverter............................................................................................................................... 26
4.2.1 Switching off the Inverter ................................................................................................................................. 26
4.2.2 Disconnecting the DC Side.............................................................................................................................. 26
4.2.3 Disconnecting the AC Side.............................................................................................................................. 27
4.2.4 Disconnecting the Supply Voltage at the Inverter from Voltage Sources ..................................................... 27
4.3 Reconnecting the Inverter................................................................................................................................ 28
4.3.1 Reconnecting the Supply Voltage at the Inverter ........................................................................................... 28
4.3.2 Reconnecting the AC Side............................................................................................................................... 29
4.3.3 Reconnecting the DC Side............................................................................................................................... 29
4.3.4 Restarting the Inverter ...................................................................................................................................... 29

5 Troubleshooting............................................................................................................................ 30
5.1 Safety during Troubleshooting........................................................................................................................ 30

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5.2 Reading Off Disturbance Messages .............................................................................................................. 30

5.2.1 Reading Off Error Messages via Touch Display............................................................................................ 30
5.2.2 Reading Off Disturbance Messages via the User Interface .......................................................................... 31
5.2.3 Displaying the Event Report............................................................................................................................. 31
5.2.3.1 Enabling Automatic Read-Out of Events........................................................................................................ 31
5.2.3.2 Displaying and Downloading the Event Report ............................................................................................ 31
5.3 Acknowledging Disturbance Messages......................................................................................................... 31
5.3.1 Acknowledging Disturbance Messages via the Key Switch ......................................................................... 31
5.3.2 Acknowledging Disturbance Messages via the User Interface..................................................................... 32
5.4 Remedial Action in Case of Disturbances ...................................................................................................... 32
5.4.1 Inverter Behavior in Case of Disturbances ..................................................................................................... 32
5.4.2 Content and structure of the error tables........................................................................................................ 34
5.4.3 Error Numbers 01xx to 13xx - Disturbance on the Utility Grid .................................................................... 34
5.4.4 Error Numbers 34xx to 40xx - Disturbance on the PV Array ....................................................................... 35
5.4.5 Error Numbers 6xxx to 9xxx - Disturbance on the Inverter........................................................................... 37
5.4.6 Displaying Disturbance Messages for Active Power Limitation .................................................................... 40
5.4.7 Displaying Disturbance Messages for the Reactive Power Setpoint ............................................................ 41

6 Maintenance................................................................................................................................. 42
6.1 Safety during Maintenance ............................................................................................................................ 42
6.2 Maintenance Schedule and Consumables .................................................................................................... 43
6.2.1 Notes on Maintenance Work ......................................................................................................................... 43
6.2.2 Maintenance Work Every 24 Months............................................................................................................ 43
6.3 Repair Schedule and Spare Parts................................................................................................................... 44
6.3.1 Information on Repair Work............................................................................................................................ 44
6.3.2 Demand-Based Annual Repairs ...................................................................................................................... 45
6.3.3 Repairs every 10 Years ................................................................................................................................... 45
6.3.4 Repairs every 12 Years ................................................................................................................................... 45
6.4 Maintenance Work ......................................................................................................................................... 45
6.4.1 Maintenance work with supply voltage present ............................................................................................ 45
6.4.1.1 Checking the Fans........................................................................................................................................... 45
6.4.1.2 Checking the Heating Elements and Hygrostat ............................................................................................ 46
6.4.1.3 Inverter with Low-Temperature Option: Cleaning the Heating Elements ..................................................... 47
6.4.1.4 Inverter with Low-Temperature Option: Checking the Heating Elements .................................................... 48
6.4.1.5 Checking the Function of the UPS.................................................................................................................. 50
6.4.2 Maintenance Work in Disconnected State..................................................................................................... 51
6.4.2.1 Performing the Visual Inspection .................................................................................................................... 51
6.4.2.2 Analyzing the Temperature Indicators........................................................................................................... 51
6.4.2.3 Cleaning the Ventilation Plate ........................................................................................................................ 53
6.4.2.4 Cleaning the Air Duct, Ventilation Grids and Air Intake............................................................................... 53
6.4.2.5 Cleaning the Interior ....................................................................................................................................... 55
6.4.2.6 Checking the Seals ......................................................................................................................................... 56
6.4.2.7 Checking the Latches, Door Stops and Hinges............................................................................................. 56
6.4.2.8 Checking the Inverter Surface ........................................................................................................................ 57
6.4.2.9 Checking the Fuses/Disconnection Blades ................................................................................................... 58
6.4.2.10 Checking the Bolted Connections of the Power Cabling ............................................................................. 58
6.4.2.11 Checking the Labels........................................................................................................................................ 59
6.5 Repair Work..................................................................................................................................................... 61
6.5.1 Reading off the Replacement Interval Meter.................................................................................................. 61

7 Periodic Actions ............................................................................................................................ 62

7.1 Mounting and Disassembly Work.................................................................................................................. 62
7.1.1 Disassembling and Mounting the Panels........................................................................................................ 62
7.1.2 Disassembling and Mounting the Protective Covers...................................................................................... 63
7.1.3 Disassembling and Mounting the Ventilation Grids....................................................................................... 64

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7.2 Entering the Password via the Touch Display ................................................................................................ 65

7.3 Parameter Overview........................................................................................................................................ 65
7.3.1 Accessing the Parameter Overview ................................................................................................................ 65
7.3.2 Saving Parameter Changes............................................................................................................................. 66
7.4 User Interface................................................................................................................................................... 66
7.4.1 Logging Into the User Interface ....................................................................................................................... 66
7.4.2 Logging Out of the User Interface .................................................................................................................. 66

8 Appendix ...................................................................................................................................... 67
8.1 Installation Information .................................................................................................................................... 67
8.1.1 Torques ............................................................................................................................................................. 67
8.2 Type Label........................................................................................................................................................ 67
9 Contact .......................................................................................................................................... 68

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1 Information on this Document SMA Solar Technology AG

1 Information on this Document

1.1 Validity
This document is valid for the following device types:
Device type Production version OCU firmware DSP firmware
version version
SC 500CP‑10 (Sunny Central 500CP XT) E7 02.00.01.R 02.00.01.R
SC 630CP‑10 (Sunny Central 630CP XT)
SC 720CP‑10 (Sunny Central 720CP XT)
SC 760CP‑10 (Sunny Central 760CP XT)
SC 800CP‑10 (Sunny Central 800CP XT)
SC 850CP‑10 (Sunny Central 850CP XT)
SC 900CP‑10 (Sunny Central 900CP XT)
SC 1000CP‑10 (Sunny Central 1000CP XT)
The production version is indicated on the type label.
The firmware version can be read off from the user interface.
Illustrations in this document are reduced to the essential and may deviate from the real product.

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 the product works and is operated
• Training in how to deal with the dangers and risks associated with installing, repairing and using electrical devices
and installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of all applicable laws, standards and directives
• Knowledge of and compliance with this document and all safety information

1.3 Levels of Warning Messages

The following levels of warning messages may occur when handling the product.

DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

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SMA Solar Technology AG 1 Information on this Document

NOTICE
Indicates a situation which, if not avoided, can result in property damage.

1.4 Symbols in the Document

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

Example

1.5 Typographical Elements in the Document

Typography Use Example
bold • Messages • Connect the insulated conductors
• Terminals to the terminals X703:1 to
X703:6.
• Elements on a user interface
• Enter 10 in the field Minutes.
• Elements to be selected
• Elements to be entered
> • Connects several elements to be • Select Settings > Date.
selected
[Button] • Button or key to be selected or pressed • Select [Enter].
[Key]
# • Placeholder for variable components • Parameter WCtlHz.Hz#
(e.g., parameter names)

1.6 Designations in the Document

Complete designation Designation in this document
Medium-voltage transformer MV transformer
Sunny Central Communication Controller SC-COM, communication unit
Sunny Central CP XT Sunny Central or inverter

1.7 Additional Information

For more information, please go to www.SMA-Solar.com.

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1 Information on this Document SMA Solar Technology AG

Title and information content Type of information

"Requirements for medium-voltage transformers and transformers for internal Technical Information
power supply for SUNNY CENTRAL and SUNNY CENTRAL STORAGE"
"PUBLIC CYBER SECURITY - Guidelines for a Secure PV System Communication" Technical information
For information on maintenance activities of the DC switchgear and AC disconnect unit please visit www.abb.com:
Component Document number
DC switchgear, AC disconnection unit: T-Max 1SDH000707R0001
DC switchgear: E-Max 1SDH000460R0003

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SMA Solar Technology AG 2 Safety

2 Safety
2.1 Intended Use
The Sunny Central is a PV inverter which converts the direct current generated in the PV modules into grid-compliant
alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the
utility grid.
The product is suitable for indoor and outdoor use.
The enclosure complies with degree of protection IP54. The inverter is classified under Class 4C2 as per
EN 60721-3-4 and is suitable for operation in a chemically active environment.
The maximum permissible DC input voltage of the inverter must not be exceeded.
The inverter must only be operated in conjunction with a suitable MV transformer.
• The MV transformer must be designed for voltages that arise during pulsed mode of the inverter.
• For the Sunny Central 500CP XT/630CP XT/720CP XT/760CP XT/800CP XT the maximum voltage to ground is:
±1450 V
• For the Sunny Central 850CP XT/900CP XT/1000CP XT the maximum voltage to ground is: ±1600 V
• Do not connect more than one inverter to one winding of the MV transformer.
• The neutral conductor on the low-voltage side of the MV transformer must not be grounded.
You can find further information on suitable transformers in the technical information "Requirements for Medium-
Voltage Transformers and Transformers for Internal Power Supply for the SUNNY CENTRAL".
Do not deactivate or modify settings that affect grid management services without first obtaining approval from the grid
operator.
Use this product only in accordance with the information provided in the enclosed documentation and with the locally
applicable standards and directives. Any other application may cause personal injury or property damage.
Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such
changes.
Any use of the product other than that described in the Intended Use section does not qualify as the intended use.
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for
future reference and observe all instructions contained therein.
All work on the product must only be performed using appropriate tools and in compliance with the ESD protection
regulations.
Suitable personal protective equipment must be worn by all persons working on or with the product.
Unauthorized persons must not operate the product and must be kept at a safe distance from the product.
The product must not be operated with open covers or doors.
The product must not be opened when it is raining or when humidity exceeds 95%.
The product must not be operated with any technical defects.
The type label must remain permanently attached to the product.

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2 Safety SMA Solar Technology AG

2.2 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
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the product. Touching live components results in death or
serious injury due to electric shock.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch any live components.
• Observe all warning messages on the product and in the documentation.
• Observe all safety information of the module manufacturer.
• After switching off the inverter, wait at least 15 minutes before opening it to allow the capacitors to discharge
completely (see Section 4.2, page 26).

DANGER
Danger to life due to electric shock when live components or DC cables are touched
When exposed to sunlight, the PV modules generate high DC voltage which is present in the DC cables. Touching
live DC cables results in death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.

DANGER
Danger to life due to electric shock in case of a ground fault
If there is a ground fault, components that are supposedly grounded may in fact be live. Touching live parts will
result in death or serious injury due to electric shock.

DANGER
Danger to life from electric shock due to damaged product
Operating a damaged product can lead to hazardous situations that result in death or serious injuries due to
electric shock.
• Only operate the product when it is in a flawless technical condition and safe to operate.
• Check the product regularly for visible damage.
• Make sure that all external safety equipment is freely accessible at all times.
• Make sure that all safety equipment is in good working order.
• Wear suitable personal protective equipment for all work on the product.

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SMA Solar Technology AG 2 Safety

DANGER
Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides
The precharge unit of the order option "Q at Night" will carry live voltage even if the AC contactor and the DC
switchgear are open. Touching live components results in death or serious injury due to electric shock.
• Do not touch any live components.
• Switch off the inverter.
• After switching off the inverter, wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Ensure that no voltage is present.
• Do not remove protective covers.
• Observe the warning messages.
• Wear suitable personal protective equipment for all work on the product.

WARNING
Danger to life from electric shock when entering the PV field
Ground-fault monitoring does not provide protection from personal injury. PV modules which are grounded with
ground-fault monitoring discharge voltage to ground. Entering the PV field can result in lethal electric shocks.
• Ensure that the insulation resistance of the PV field exceeds the minimum value. The minimum value of the
insulation resistance is: 1 kΩ.
• Before entering the PV field, switch the PV modules to insulated operation.
• Configure the PV power plant as a closed electrical operating area.

WARNING
Danger to life due to electric arc if there are tools inside the product
When reconnecting or during operation, an electric arc can occur if there are tools in the product creating a
conductive connection between the live components. This can result in death or serious injury.
• Before commissioning or reconnection, verify that no tools are inside the product.

WARNING
Danger to life from electric shock if the product is not locked
If the product is not locked, unauthorized persons will have access to live components carrying lethal voltages.
Touching live components can result in death or serious injury due to electric shock.
• Always close and lock the product.
• Remove the keys.
• Store the keys in a safe place.
• Ensure that no unauthorized persons have access to the closed electrical operating area.

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2 Safety SMA Solar Technology AG

WARNING
Danger to life due to blocked escape routes
In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two
products located opposite each other can block the escape route. It is imperative that the escape route is freely
accessible at all times.
• An escape route must be available at all times. Make sure the minimum passage width of the escape route
meets local standards.
• Do not place any objects in the escape route area.
• Remove all tripping hazards from escape routes.

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

NOTICE
Property damage due to dust intrusion and moisture penetration
Dust or moisture intrusion can damage the product and impair its functionality.
• Do not open the enclosure during rainfall or when humidity exceeds the specified thresholds. The humidity
thresholds are: 15% to 95%.
• Only perform maintenance work when the environment is dry and free of dust.
• Operation of the product is only permitted when it is closed.
• Connect the external supply voltage after mounting and installing the product.
• If the installation or commissioning process is interrupted, mount all panels.
• Close and lock the enclosure.
• The product must always be closed for storage.
• Store the product in a dry and covered location.
• The temperature at the storage location must be in the specified range. The temperature range is:
−25°C to +70°C.

NOTICE
Damage to electronic components due to electrostatic discharge
Electrostatic discharge can damage or destroy electronic components.
• Observe the ESD safety regulations when working on the product.
• Wear suitable personal protective equipment for all work on the product.
• Discharge electrostatic charge by touching grounded enclosure parts or other grounded elements. Only then is
it safe to touch electronic components.

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SMA Solar Technology AG 2 Safety

2.3 Cyber Security

Most operating activities such as monitoring and control of systems can be done locally by the PV system operator or
service personnel without the need for data communication via public Internet infrastructure. These operating activities,
including data communication between PV system operator/service personnel and data logger, inverter or additional
equipment, can be accessed by using local displays, keypads or using local access of the webserver of a device in the
LAN of the PV system or of the building.
In other use cases of systems, the PV systems are also part of the global communication system, which is based on
Internet infrastructures.
The data communication via Internet is an up-to-date, economically viable and customer-friendly approach in order to
enable easy access for the following modern applications such as:
• Cloud platforms (e.g. Sunny Portal)
• Smartphones or other mobile devices (iOS or Android apps)
• SCADA systems, which are remotely connected
• Utility interfaces for grid management services
Alternatively, selected and secured communication interfaces may be used. These solutions are no longer state of the
art and are very expensive to use (special communication interfaces, separate wide area networks and more).
When using the Internet infrastructure, the systems connected to the Internet are entering a basically unsecure area.
Potential attackers constantly seek vulnerable systems. Usually, they are criminally motivated, have a terrorist
background or aim to disrupt business operations. Without taking any measures to protect systems and other systems
from such misuse, a data communication system should not be connected to the Internet.
You can find the current recommendations by SMA Solar Technology AG on the topic of Cyber Security in the
Technical Information "PUBLIC CYBER SECURITY - Guidelines for a Secure PV System Communication" at www.SMA-
Solar.com.

2.4 Personal Protective Equipment

Always wear suitable protective equipment
When working on the product, always wear the appropriate personal protective equipment for the specific job.
The following personal protective equipment is regarded to be the minimum requirement:
☐ In a dry environment, safety shoes of category S3 with perforation-proof soles and steel toe caps
☐ During precipitation or on moist ground, safety boots of category S5 with perforation-proof soles and steel toe
caps
☐ Tight-fitting work clothes made of 100% cotton
☐ Suitable work pants
☐ Individually fitted hearing protection
☐ Safety gloves
Any other prescribed protective equipment must also be used.

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3 Product Overview SMA Solar Technology AG

3 Product Overview
3.1 Design of the Inverter
A B

Figure 1: Design of the Inverter

Position Designation
A Inverter cabinet
B Interface cabinet
C Connection area

3.2 Devices of the Inverter

D

A E
B
C
F

Figure 2: Inverter Components

Position Component Description

A Touch Display Different kinds of inverter data can be viewed on the touch display. The
touch display is only used to view data. The display screen is activated by
touching the touch display.
B Service interface The service interface allows access to the user interface.
C Key switch The key switch is used to switch the inverter on and off.
D DC switchgear The DC switchgear disconnects the inverter from the PV array.

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SMA Solar Technology AG 3 Product Overview

Position Component Description

E SC-COM The SC-COM is the communication unit of the inverter. The SC-COM estab-
lishes the connection between the inverter and the system operator.
F AC disconnection unit With the AC disconnection unit, the electrical connection between the in-
verter and MV transformer can be disconnected manually.
In the event of residual current, the AC disconnection unit disconnects the
connection between the inverter and MV transformer automatically.
G AC contactor The AC contactor disconnects the electrical connection between the in-
verter and MV transformer automatically.

3.3 Operating and Display Elements

3.3.1 Function of the Switches
3.3.1.1 Key Switch
The key switch is used to switch the inverter on and off.

Figure 3: Switch positions of the key switch

Position Designation
A Switch position Stop
B Switch position Start

Switch position Start

If the key switch is turned to Start, a motor drive switches the DC switchgear on and the inverter switches from the
operating state "Stop" to the operating state "Grid monitoring". Provided that there is sufficient irradiation and a valid
utility grid connection, the inverter switches to feed-in operation. If there is insufficient irradiation and the input voltage
is therefore too low, the inverter remains in the operating state "Grid monitoring".

Switch position Stop

If the key switch is turned to Stop while the inverter is in the operating state "Grid monitoring", a motor drive switches
the DC switchgear off. The inverter switches to the operating state "Stop". If the key switch is turned to Stop while the
inverter is in the operating state "MPP load operation", the inverter switches to the operating state "Shutdown". Once
shutdown is complete, the AC contactor and the DC switchgear are opened automatically and the inverter switches to
the operating state "Stop".

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3 Product Overview SMA Solar Technology AG

3.3.1.2 AC Disconnection Unit

The AC disconnection unit disconnects the inverter from the MV transformer.

Figure 4: Switch positions of the AC disconnection unit from ABB

Position Designation Explanation

A Switch position on The AC disconnection unit is closed.
B Central switch position The AC disconnection unit was tripped and is open.
C Switch position off The AC disconnection unit is open.

3.3.1.3 DC Switchgear
The DC switchgear disconnects the inverter from the PV power plant.

Figure 5: Indicators on the DC load-break switch

Position Designation
A Spring status indicator
B Position indicator
C ON button
D OFF button

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SMA Solar Technology AG 3 Product Overview

3.3.2 Touch Display

3.3.2.1 Design
The touch display is used to display instantaneous values and parameter settings. Tapping the symbols on the touch
display activates the corresponding functions. If the touch display has not been touched for five minutes, the display is
locked and the logged-in user will be logged out. By tapping the characters "S", "M" or "A", you can unlock the display
again.
The touch display is divided into three areas.

100 DD.MM.YYYY-hh:mm:ss A

Figure 6: Design of the touch display

Position Designation Explanation

A Status info line Number of the active menu, login status and time
B Information field Area of the main menu
C Navigation line Navigation area

3.3.2.2 Explanation of Symbols

Information field
You can access the following sub-menus and screens from the information field:
Symbol Designation Explanation
E-today line graph Diagram 103: Representation of energy fed in during the current day in
kWh.

Bar chart Diagram 104: Representation of energy fed in during the last 14 days in
kWh.

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3 Product Overview SMA Solar Technology AG

Symbol Designation Explanation

DC side Representation of the instantaneous values
• PV power in W
• Insulation resistance in Ω
• PV current in A
• PV voltage in V
• Diagram of string-current monitoring
– Diagram 132 to 133: Group currents of the individual Sunny
String‑Monitors
– Diagram 140 to 146: String currents of the individual Sunny
String‑Monitors
String-current monitoring of Representation of the instantaneous values of the string-current monitoring
the DC side of the individual Sunny String-Monitors

Switch on DC or AC side If you see this symbol between the "DC side" symbol and the "Inverter
closed data" symbol, the DC switchgear is closed.
If you see this symbol between the symbol "Inverter data" and the symbol
"AC side", the AC contactor is closed.
Switch on DC or AC side If you see this symbol between the "DC side" symbol and the "Inverter
open data" symbol, the DC switchgear is open.
If you see this symbol between the symbol "Inverter data" and the symbol
"AC side", the AC contactor is open.
Status of switches on DC or If you see this symbol between the "DC side" symbol and the "Inverter
AC side unknown data" symbol, the switch status of the DC switchgear is not known.
If you see this symbol between the symbol "Inverter data" and the symbol
"AC side", the switch status of the AC contactor is unknown.
Inverter data Representation of the following inverter data:
• Device type
• Operating state
• Symbol for utility grid menu
• Symbol for temperature display
• Symbol for fan display

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SMA Solar Technology AG 3 Product Overview

Symbol Designation Explanation

AC side Representation of the following instantaneous values:
• Active power in W
• Reactive power in VAr
• Power frequency in Hz
• AC current in A
• AC voltage in V
grid First menu page:
• Active mode of active power limitation
• Target active power in kW
• Actual active power in kW
Second menu page
• Active mode of reactive power setpoint
• Target reactive power in VAr
• Target displacement power factor cos φ
• Target excitation type of the displacement power factor
• Actual reactive power in VAr
• Actual displacement power factor cos φ
• Actual excitation type of the displacement power factor

Settings Menu
Symbol Designation Explanation
Language selection Select this symbol to open the language selection menu.

Brightness setting Select this symbol to open the brightness setting menu.

Time setting Select this symbol to open the time setting menu.

Format selection Select this symbol to open the format selection menu.

Password entry Select this symbol to open the password entry menu.

Navigation line
Symbol Designation Explanation
Back Select this symbol to go back to the previous page.

Homepage Select this symbol to go to the homepage.

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Symbol Designation Explanation

Settings • Language selection
• Brightness setting
• Time setting
• Format selection
• Password entry
Information • OS: version of the operating system
• App.: version of the application software
• SC-COM version: SC-COM software version
• Ser.No.: inverter serial number
• Hardware: hardware version and serial number of the SC-COM
Error • ErrNo: error number
• TmsRmg: time until reconnection
• Msg: error message
• Dsc: corrective measure
Service • Telephone receiver: Contact Service.
• Tool: Contact your installer.

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3.3.3 LEDs of the SC-COM

3.3.3.1 LEDs on the Enclosure

Figure 7: LEDs on the enclosure

LED designation Status Explanation

POWER glowing green The SC-COM is supplied with voltage.
off The SC-COM is not supplied with voltage.
SD1 flashing green Read or write access to system drive
SD2 flashing green Read or write access to internal data drive
CF flashing green Read or write access to external SD memory card
H1 flashing green The SC-COM is transmitting data to Sunny Portal/FTP server.
glowing green The most recent data transmission to Sunny Portal/FTP server was
successful.
glowing red The most recent data transmission to Sunny Portal/FTP server has
failed.
off Data transmission to Sunny Portal/FTP server is deactivated.

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LED designation Status Explanation

H2 flashing green The SC-COM is communicating with the devices connected within the
system.
glowing green Internal communication has taken place in the last five minutes.
glowing red An error has occurred in the internal communication.
off No internal communication for more than five minutes.
H3 flashing red The SC-COM is starting up.
glowing red An error has occurred in the SC-COM.
glowing green The SC-COM is ready for use.
H4 glowing green An internal memory card exists and less than 92% of its storage ca-
pacity is used.
glowing red The internal memory card is full and the oldest saved data is being
overwritten.
flashing red 92% of the storage capacity of the internal memory card is used.
H5 glowing green An external memory card exists and less than 92% of its storage ca-
pacity is used.
glowing red The external memory card is full.
flashing red 92% of the storage capacity of the external memory card is used.
off There is no external memory card.
H6 - Not assigned
H7 - Not assigned
H8 flashing green Application is running.

3.3.3.2 LEDs on the Network Port

Figure 8: LEDs on the network port

Position LED Color Status Explanation

A Speed yellow on 100 MBit data transfer rate
off 10 MBit data transfer rate
B Link/Activity green on Connection (Link) established.
flashing The SC-COM is transmitting or receiving data (Ac-
tivity).
off No connection established.

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3.3.3.3 LEDs on the Optical Fiber Terminals

The SC-COM is also available with pre-wired optical fiber connections. If the optical fibers are connected to the splice
box of the inverter, the status of the connection will be indicated by the LEDs of the SC-COM.

Figure 9: LEDs for the status of the optical fiber connection

Position LED Color Status Explanation

A Link / Activity green on Connection (Link) established.
flashing The SC-COM is transmitting or receiving data
(Activity).
off No connection established.

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3.3.4 User Interface

3.3.4.1 Design of the User Interface
Via the user interface, you can set the communication of the devices of your PV power plant, configure the inverter
parameters and read off error messages and operating data.

C
D

A E

B
Figure 10: Design of the user interface (example)

Position Designation
A Tree view or device view
B Status bar
C Logout button
D Navigation bar
E Content area

3.3.4.2 Tree View and Device View

You can call up data of the individual devices of your PV power plant in the tree view or the device view. Depending
on which view you have selected, the devices are sorted differently.
Symbol Designation Explanation
Tree view In the tree view, the user interface shows the devices in the or-
der in which they are connected to the data bus.

Device view In the device view, the user interface shows all devices sorted
by device type. The number shown in parentheses indicates the
number of devices of a device type.

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3.3.4.3 Status Symbols

Depending on the status of the device communication, the device symbols are displayed in the tree or device view with
various status symbols.
Symbol Explanation
The inverter is ready for operation.

There is an error in the inverter.

An error has occurred in the communication with the inverter.

3.4 Symbols on the Product

The following gives an explanation of all the symbols found on the inverter and on the type label.
Symbol Designation Explanation
CE marking The product complies with the requirements of the applicable EU di-
rectives.

Protection class I All electrical equipment is connected to the grounding conductor sys-
tem of the product.
Degree of protection IP54 The product is protected against interior dust deposits and splashing
water from all angles.
Beware of a danger zone This warning symbol indicates a danger zone. Be particularly vigilant
and cautious when working on the product.

Beware of dangerous volt- The product operates at high voltages. All work on the product must
age be carried out by qualified persons only.

Beware of hot surface The product can get hot during operation. Avoid contact during oper-
ation. Allow the product to cool down sufficiently before carrying out
any work. Wear personal protective equipment such as safety
gloves.
Use hearing protection. The product generates loud noises. When working on the product,
wear hearing protection.

Observe the documenta- Observe all documentation supplied with the product.
tion.

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4 Disconnecting and Reconnecting SMA Solar Technology AG

4 Disconnecting and Reconnecting

4.1 Safety When Disconnecting and Reconnecting Voltage Sources
DANGER
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the product. Touching live components results in death or
serious injury due to electric shock.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch any live components.
• Observe all warning messages on the product and in the documentation.
• Observe all safety information of the module manufacturer.
• After switching off the inverter, wait at least 15 minutes before opening it to allow the capacitors to discharge
completely (see Section 4.2, page 26).

DANGER
Danger to life due to electric shock in case of a ground fault
If there is a ground fault, components that are supposedly grounded may in fact be live. Touching live parts will
result in death or serious injury due to electric shock.

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

4.2 Disconnecting the Inverter

4.2.1 Switching off the Inverter
1. Turn the key switch to Stop.
2. Remove the key. This will protect the inverter from inadvertent reconnection.
3. Wait 15 minutes before opening the doors. This allows the inverter capacitors to discharge.

4.2.2 Disconnecting the DC Side

1. Switch off the inverter (see Section 4.2.1, page 26).
2. Disconnect all poles of the DC voltage in the DC main distribution or DC subdistribution (see documentation of the
main or subdistribution).
3. Ensure that the DC switchgear in the inverter is open.
4. Ensure that no voltage is present on the load side of the DC switchgear.
5. Cover or isolate any adjacent live components.
6. Remove the protective covers over the fuses.
7. Remove all fuses and disconnection blades from all fuse holders of the inverters. Use an LV/HRC fuse extractor.

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4.2.3 Disconnecting the AC Side

1. Switch off the inverter (see Section 4.2.1, page 26).
2. Disconnect the DC side (see Section 4.2.2, page 26).
3. Externally disconnect the AC voltage of the MV transformer.
4. Switch off the AC disconnection unit in the inverter.

5. Ensure that no voltage is present.

6. Cover or isolate any adjacent live components.

4.2.4 Disconnecting the Supply Voltage at the Inverter from Voltage Sources
1. If the supply voltage is only to be disconnected upstream from the
circuit breaker, switch the circuit breaker of the supply voltage off.

2. If the supply voltage is also to be disconnected downstream from the supply voltage circuit breaker, switch the
external circuit breaker of the supply voltage off.
Tip: The external circuit breaker of the supply voltage is usually located in a subordinate distribution station.
3. Disconnect any additional external voltage.
4. Switch the motor-protective circuit-breakers of the grid monitoring
off.

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4 Disconnecting and Reconnecting SMA Solar Technology AG

5. Open the measurement and disconnect terminals.

6. Ensure that no voltage is present.

7. Cover or isolate any adjacent live components.

4.3 Reconnecting the Inverter

4.3.1 Reconnecting the Supply Voltage at the Inverter
1. Close the measurement and disconnect terminals.

2. Switch on the motor-protective circuit-breakers of the grid

monitoring.

3. Connect any additional external voltage.

4. If the supply voltage has been disconnected downstream from the circuit breaker, switch the external circuit
breaker of the supply voltage on.
Tip: The external circuit breaker of the supply voltage is usually located in a subordinate distribution station.

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SMA Solar Technology AG 4 Disconnecting and Reconnecting

5. If the supply voltage has been disconnected upstream from the

circuit breaker, switch the circuit breaker of the supply voltage on.

4.3.2 Reconnecting the AC Side

1. Reconnect the supply voltage and external voltages (see Section 4.3.1, page 28).
2. Reconnect the AC voltage of the MV transformer.
3. Switch on the AC disconnection unit in the inverter.

4.3.3 Reconnecting the DC Side

1. Insert all fuses and disconnection blades into all fuse holders of the inverter. Use an LV/HRC fuse extractor.
2. Screw on the protective covers over the fuses (torque: 5 Nm).
3. Switch on the DC voltage in the DC main distribution or DC subdistribution (see documentation of the main or
subdistribution).

4.3.4 Restarting the Inverter

• Turn the key switch to Start.

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5 Troubleshooting SMA Solar Technology AG

5 Troubleshooting
5.1 Safety during Troubleshooting
DANGER
Danger to life from electric shock due to high voltages on the product
High voltages can be present on the product under fault conditions. Touching live components results in death or
serious injury due to electric shock.
• Observe all safety information when working on the product.
• Wear suitable personal protective equipment for all work on the product.
• If you cannot remedy the disturbance with the help of this document, contact the Service (see Section 9
"Contact", page 68).

WARNING
Danger to life from electric shock due to live external supply voltage
When using an external supply voltage, even after disconnecting the inverter, there may still be lethal voltages
present in cables. Touching live components can result in death or serious injury due to electric shock.
• Disconnect the external supply voltage.

WARNING
Hearing impairment due to high-frequency noises of the product
The product generates high-frequency noises during operation. This can result in hearing impairment.
• Wear hearing protection.

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

CAUTION
Danger of crushing and collision when carelessly working on the product
Carelessly working on the product could result in crushing injuries or collisions with edges.
• Wear personal protective equipment for all work on the product.

5.2 Reading Off Disturbance Messages

5.2.1 Reading Off Error Messages via Touch Display
If an error occurs, a warning symbol is shown on the touch display.

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Procedure:
• Select the warning symbol.
☑ The touch display lists the error number, waiting time, error message and the necessary corrective measure to
eliminate the disturbance.

5.2.2 Reading Off Disturbance Messages via the User Interface

1. Log into the user interface (see Section 7.4.1, page 66).
2. To display the error number, select the instantaneous value ErrNo in the instantaneous value view.
3. To display the delay time, select the instantaneous value TmsRmg in the instantaneous value view.
4. To display the error message, select the instantaneous value Msg in the instantaneous value view.
5. To display the corrective measure, select the instantaneous value Dsc in the instantaneous value view.

5.2.3 Displaying the Event Report

5.2.3.1 Enabling Automatic Read-Out of Events
1. Log into the user interface (see Section 7.4.1, page 66).
2. Select Sunny Central > Recording.
3. In the field Collect automatically fault logs, select yes.
4. Select the button [Save].

5.2.3.2 Displaying and Downloading the Event Report

The event report keeps a log of various events, e.g. errors and warnings. All events can be downloaded in a CSV file.
Upon delivery, the automatic transfer of the events is deactivated.
Procedure:
1. Log into the user interface (see Section 7.4.1, page 66).
2. In order to have the event report of the inverter displayed manually, proceed as follows:
• Select Sunny Central > Recording.
• In the field Manually requesting fault memory, select [Request].
• In the field Manually requesting event memory, select [Request].
3. Select Sunny Central > Events.
4. To download the events as CSV file, carry out the following steps:
• Select the button [Download].
• Choose the save location.
• Select the button [Save].

5.3 Acknowledging Disturbance Messages

5.3.1 Acknowledging Disturbance Messages via the Key Switch
Dealing with disturbances
Disturbance messages should only be acknowledged once the underlying causes have been eliminated.
If the causes of the disturbance have not been eliminated, the disturbance will still be detected after
acknowledgment and the disturbance message will reappear.
Procedure:
1. If an insulation error has occurred, switch the insulation monitoring device back on.
2. Turn the key switch switch to Stop and then back to Start after two seconds.

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5.3.2 Acknowledging Disturbance Messages via the User Interface

Dealing with disturbances
Disturbance messages should only be acknowledged once the underlying causes have been eliminated.
If the causes of the disturbance have not been eliminated, the disturbance will still be detected after
acknowledgment and the disturbance message will reappear.
You will only be able to acknowledge error messages via the user interface after entering the installer password.
Procedure:
1. If an insulation error has occurred, switch the insulation monitoring device back on.
2. Log into the user interface (see Section 7.4.1, page 66).
3. Select the parameter Ackn in the device displaying the error, and set to Ackn.
4. Select the button [Save].

5.4 Remedial Action in Case of Disturbances

5.4.1 Inverter Behavior in Case of Disturbances
If a disturbance occurs during operation, this may be caused by a warning or an error.
There are two levels assigned to each disturbance which influence the display and system behavior. Only in the case
of certain disturbances will the inverter behavior differ depending on the level. The level is increased from 1 to 2 if the
disturbance occurs five times within two hours or without interruption for two hours.
Inverter behavior in the disturbance levels 1 and 2:
• Waiting time
The inverter switches to the operating state "Disturbance" and opens the AC contactor and DC switchgear. The
inverter does not feed into the grid for the defined waiting time.
The waiting time specifies how long the disturbance will be shown on the touch display and saved as a
disturbance. Once the waiting time has elapsed, the disturbance is no longer shown on the touch display. The
inverter then checks whether the cause of the disturbance has been rectified.
If the cause of the disturbance still exists after the waiting time has expired or the disturbance has been
acknowledged, the inverter remains in the operating state "Disturbance."
• Waiting for acknowledgement
The inverter switches to the operating state "Disturbance" and opens the AC contactor and DC switchgear. The
inverter does not feed in until the disturbance is acknowledged.
The cause of the disturbance must be detected on-site. To this end, read off the fault memory and event messages
of the inverter and note down the error numbers.
The cause of the disturbance must be remedied. You will find the corrective measures on the following pages. For
further information, contact us (see Section 9, page 68).
It must be ensured that the inverter and its components are in a proper and safe condition. For this purpose, a
visual inspection should be carried out with special attention to discolorations, contaminations and signs of wear.
The disturbance may be acknowledged only after the elimination of all causes and the completion of the visual
inspection.
Once the disturbance has been acknowledged, it is no longer shown on the touch display. The inverter then
checks whether the cause of the disturbance has been rectified.
If the disturbance is no longer pending, it is deleted from the memory. If the cause of the disturbance still exists
after the disturbance has been acknowledged, the inverter remains in the operating state "Disturbance."

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• Day change
The inverter switches to the operating state "Disturbance" and opens the AC contactor and DC switchgear. The
inverter does not feed in.
The disturbance is automatically reset when the day changes. Once the disturbance has been reset, it is no longer
shown on the touch display. The inverter then checks whether the cause of the disturbance has been rectified.
If the disturbance is no longer pending, it is deleted from the memory. If the cause of the disturbance still exists
after the day has changed or the disturbance has been acknowledged, the inverter remains in the operating state
"Disturbance".
• System-specific
The inverter switches to the operating state "Disturbance" and opens the AC contactor and DC switchgear. The
inverter does not feed in. How long the inverter remains in this state depends on the system-specific influencing
factors.
Once the time has elapsed, the disturbance is no longer shown on the touch display. The inverter then checks
whether the cause of the disturbance has been rectified. If the disturbance is no longer pending, it is deleted from
the memory. If the cause of the disturbance still exists after the disturbance has been acknowledged, the inverter
remains in the operating state "Disturbance."
• Warning
A warning does not affect inverter behavior. The cause of the warning must be determined and remedied.
In the operating state "Disturbance", the touch display shows a warning symbol, error number, waiting time, error
message and the required measure to eliminate the disturbance message.
Once the cause of the disturbance has been rectified and the disturbance is no longer displayed, it is deleted from the
fault memory. To view previous disturbances after they have been deleted from the fault memory, an event report is
filed on the SD memory card. The event report logs the time and type of disturbance. The event report can also be
displayed on the user interface.
Depending on the type of disturbance, a reset may be performed. When this happens, the relays are checked and the
supply voltage of the control system is switched off. This process takes less than one minute. While the control system is
booting, the regular waiting times for grid monitoring are complied with.

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5.4.2 Content and structure of the error tables

You will find the following information in the error tables in the following sections:
A B

Error no. Explanation S1 S2 R Corrective measures

1301 Left-hand rotating magnetic field 30 s Q ‒ • Check phase position.
is connected.
3803 DC current of PV array is too high. 1 min D x • Check DC input current.

0104 Grid voltage is too high. W C ‒ • Check grid voltage.

Position Explanation
A Behavior of the inverter: disturbance level S1, disturbance level S2
• s / min: waiting time
• C: system-specific
• D: day change
• Q: waiting for acknowledgement
• W: warning
B Reset

5.4.3 Error Numbers 01xx to 13xx - Disturbance on the Utility Grid

After a grid failure, the inverter monitors the utility grid for a specific period before reconnecting. When the inverter
monitors the utility grid after a grid error, the grid monitoring time is complied with. Certain errors, such as grid errors,
cause the inverter to shut down. In this case, the instantaneous value TmsRmg indicates the time for which the inverter
monitors the utility grid before reconnecting. This grid monitoring time can be defined in parameter GdErrTm.
Error no. Explanation Inverter behavior Corrective measures
S1 S2 R
0103* Grid voltage is too high. Overvolt- 30 s 30 s ‒ • Check the grid voltage.
age detected by redundant moni- • Check grid connections.
toring.
• Check stability of the utility grid.
0104* Grid voltage is too high. Overvolt- C C ‒ • Make sure the external fuses work
age detected by standard monitor- properly.
ing.
• Make sure the AC cable connections
0203* Grid voltage is too low. Undervolt- 30 s 30 s ‒ are tight.
age detected by redundant moni-
toring.
0204* Grid voltage is too low. Undervolt- 30 s 30 s ‒
age detected by standard monitor-
ing.
0205* Not permitted grid frequency 30 s 30 s ‒
change or grid synchronization
not possible

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Error no. Explanation Inverter behavior Corrective measures

S1 S2 R
0404* Frequency change per second too 30 s 30 s ‒ ‒
high for grid operation
0502* Power frequency is too low. Power 30 s 30 s ‒ • Check power frequency.
frequency disturbance detected by • Check the display of the grid monitoring
standard monitoring. relay.
0503* Power frequency is too high. 30 s 30 s ‒ • Make sure the fuses in the load circuit
Power frequency disturbance de- function properly.
tected by standard monitoring.
0504* Power frequency is too low. Power 30 s 30 s ‒
frequency disturbance detected by
redundant monitoring.
0505* Power frequency is too high. 30 s 30 s ‒
Power frequency disturbance de-
tected by redundant monitoring.
0506* The inverter has detected a stand- W W ‒ • Check power frequency.
alone grid and has disconnected
from the utility grid.
0801* One line conductor of the utility 30 s 30 s ‒ • Check the grid voltage.
grid has failed. • Make sure the external fuses work
0802*
properly.
• Make sure the AC cable connections
are tight.
1301 Left-hand rotating magnetic field is 30 s Q ‒ • Check the phase position.
connected. • Make sure all fuses are switched on.
1500 The conditions for grid reconnec- W W ‒ • Check the power frequency and grid
tion have not yet been reached af- voltage.
ter a grid error.
* Depending on the parameterization, the disturbance message may have to be acknowledged manually.

5.4.4 Error Numbers 34xx to 40xx - Disturbance on the PV Array

Error no. Explanation Inverter behavior Corrective measures
S1 S2 R
3403 PV array voltage is too high. 15 30 ‒ • Check the DC voltage.
min min • Check the module wiring and system
3404 Open-circuit voltage is too high. 15 30 ‒ design.
Disturbance detected by standard min min
monitoring.
3406 The DC voltage is too high. 15 30 ‒
min min

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Error no. Explanation Inverter behavior Corrective measures

S1 S2 R
3501 The insulation monitoring device C C ‒ • Check the PV array for ground faults.
has measured a too low ground-
ing resistance.
3502 The GFDI has tripped. C C ‒ • Check the PV array for ground faults.
3504 The insulation monitoring device W W ‒ • Check the PV array for ground faults.
has detected an insulation error.
If the parameter IsoErrIgn is set to
On, this error is ignored.
3507 A ground fault has occurred on Q Q ‒ • Check the PV array for ground faults.
the ungrounded terminal of the PV
array.
3510 The inverter has detected an insu- Q Q ‒ • Check the PV array for ground faults.
lation error on the inverter bridge.
3511 The inverter has detected an insu- W W ‒ • Check the PV array for ground faults.
lation error.
3512 The Remote GFDI has detected a Q Q ‒ • Check the PV array for ground faults.
permanent ground fault.
3515 A ground fault detected by W W ‒ • Check the PV array for ground faults.
Soft Grounding has been ignored.
3517 Insulation measuring is being per- W W ‒ ‒
formed.
3520 An insulation fault has occurred W W ‒ ‒
and has been fixed.
3601 Leakage current to ground has oc- W W ‒ • Check the grounding and equipotential
curred in the PV array or the bonding.
threshold defined in parameter • Check the module wiring and system
RisoCtlWarn has been reached. design.
• Check the parameter RisoCtlWarn.
3803 The PV array current is too high. 1 min D ‒ • Check the DC input current.
• Check the module wiring and system
design.
4003 Reverse currents detected in the PV 30 s Q ‒ • Check the PV modules for short circuits.
array or DC connection polarity • Check the module wiring and system
reversed. design.
• Check the DC terminals for correct
polarity.
• Check the functionality of the entire
string.

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5.4.5 Error Numbers 6xxx to 9xxx - Disturbance on the Inverter

Error no. Explanation Inverter behavior Corrective measures
S1 S2 R
6002 Calibration data cannot be Q Q ‒ • Contact the SMA Service Line.
loaded.
6113 Data block cannot be loaded from W W ‒ • Contact the SMA Service Line.
EEPROM or channel list has
changed (e.g. after firmware up-
date).
6115 Setting of hardware thresholds on 5 min 5 min x • Contact the SMA Service Line.
D/A converters is not possible.
6116 Real-time clock has not initialized. W W ‒ • Contact the SMA Service Line.
6117 Device address not recognized. 5 min 5 min x • Contact the SMA Service Line.
6119 Data structure for communication 5 min 5 min x • Contact the SMA Service Line.
between operation control unit
and digital signal processor is in-
valid.
6120 Watchdog tripping error 30 s W ‒ • Contact the SMA Service Line.
6121 No response from watchdog 30 s W ‒ • Contact the SMA Service Line.
6122 Ten internal monitoring errors have W 5 min ‒ • Contact the SMA Service Line.
occurred in succession.
6128 General error 5 min 5 min x • Contact the SMA Service Line.
6404 Overcurrent at line conductor L1, C Q x • Contact the SMA Service Line.
L2 or L3
6405 Overvoltage in the DC link of the 30 s 5 min ‒ • Contact the SMA Service Line.
inverter bridge
6410 24 V supply voltage is invalid. 5 min 5 min x • Contact the SMA Service Line.
6417 15 V supply voltage is invalid. 5 min 5 min x • Contact the SMA Service Line.
6418 Overtemperature of the inverter 5 min 15 ‒ • Contact the SMA Service Line.
bridge min
6422 Inverter bridge in undefined state 30 s 5 min ‒ • Contact the SMA Service Line.
6423 Overtemperature in the switch 5 min 30 ‒ • Contact the SMA Service Line.
cabinet min
6425 Synchronization error with utility 30 s 5 min x • Contact the SMA Service Line.
grid
6427 Sensor error of DC voltage mea- 30 s C ‒ • Contact the SMA Service Line.
surement
6440 The MV transformer is no longer 30 s 5 min ‒ • Check the MV transformer.
hermetically sealed.

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5 Troubleshooting SMA Solar Technology AG

Error no. Explanation Inverter behavior Corrective measures

S1 S2 R
6441 Sensor error during measurement 30 s 30 s ‒ • Contact the SMA Service Line.
of DC voltage
6443 Unspecified error in digital signal 30 s ‒ x • Contact the SMA Service Line.
processor
6447 Self-test of inverter bridge failed Q Q ‒ • Contact the SMA Service Line.
6448 Insulation monitoring provides non- W W ‒ • Check insulation monitoring.
permitted values
6451 Measured AC voltage of the in- W W ‒ • Contact the SMA Service Line.
verter is less than utility grid volt-
age.
6452 Measured AC voltage of the utility W W ‒ • Contact the SMA Service Line.
grid is less than inverter voltage.
6453 AC voltage of grid limit monitoring W W ‒ • Contact the SMA Service Line.
is faulty.
6454 AC current is faulty. W W ‒ • Contact the SMA Service Line.
6455 AC voltage is faulty. W W ‒ • Contact the SMA Service Line.
6456 Pre-charging circuit of DC link is W W ‒ • Contact the SMA Service Line.
defective.
6457 Capacitor self-test has failed. Q Q ‒ • Contact the SMA Service Line.
6461 Insulation monitoring device has 15 15 x • Check the insulation monitoring device
not adopted threshold. min min and cabling.
6471 Online capacitor self-test has Q Q ‒ • Contact the SMA Service Line.
failed.
6472 Endless loop between online and Q Q ‒ • Contact the SMA Service Line.
offline capacitor test
6486 Inadmissible deviations between W W ‒ ‒
AC power and DC power has
been detected.
6487 AC ground fault has been de- Q Q ‒ • Check the overvoltage protection.
tected. • Contact the SMA Service Line.
6501 Interior temperature of inverter is 30 s 1 min ‒ • Check function of the fans.
too high. • Clean the fans.
6502 Temperature of inverter bridge is 30 s 1 min ‒ • Clean clogged fan inlets and ventilation
too high. plates.

6508 Outside temperature is too high. 30 s 1 min ‒

6512 Minimum operating temperature W W ‒ ‒
not reached

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SMA Solar Technology AG 5 Troubleshooting

Error no. Explanation Inverter behavior Corrective measures

S1 S2 R
6605 The fast stop was tripped due 30 s 1 min ‒ • Contact the SMA Service Line.
overtemperature in the switch cabi-
net.
7001 Cable break or short circuit at in- W W ‒ • Check the wiring of the temperature
verter temperature sensor sensor.
7002 W W ‒
• Contact the SMA Service Line.
7004 W W ‒
7006 W W ‒
7501 Interior fan is defective. W W ‒ • Check function of the fans.
7502 W W ‒ • Clean the fans.
• Clean clogged fan inlets and ventilation
7503 Inverter bridge fan is defective. W W ‒ plates.
7507 Motor-protective circuit breaker of W W ‒
fan has tripped.
7510 Interior fan is defective. W W ‒
7600 Communication between touch dis- W W ‒ • Check cabling between touch display
play and communication unit is in- and communication unit.
terrupted. The error number ap- • Contact the SMA Service Line.
pears on the display only.
7601 Internal inverter error 30 s 1 min x • Contact the SMA Service Line.
7602 Internal communication error has 30 s 1 min x • Contact the SMA Service Line.
occurred or communication is inter-
7605 rupted. 30 s 1 min x • Contact the SMA Service Line.

7704 Faulty switching status of the DC 30 s Q ‒ • When disconnecting the inverter, check
switchgear that all motor-driven circuit breaker
switches are set to the OFF position. If
not, set all switches to OFF.
• Contact the SMA Service Line.
7706 The AC disconnection unit is open 30 s Q ‒ • Contact the SMA Service Line.
or was tripped.
7707 Faulty switching status of the AC 30 s Q ‒ • Contact the SMA Service Line.
disconnection unit
7708 Faulty switching status of Re- W W ‒ • Contact the SMA Service Line.
mote GFDI
7709 90% of switch cycles of the DC 10 s 10 s ‒ • Contact the SMA Service Line.
switchgear reached.
7710 100% of switch cycles of the DC 30 s 30 s ‒ • Contact the SMA Service Line.
switchgear reached.

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5 Troubleshooting SMA Solar Technology AG

Error no. Explanation Inverter behavior Corrective measures

S1 S2 R
7714 Maximum number of GFDI switch 30 s 30 s ‒ • Replace the GFDI.
cycles reached.
7801 The surge arrester is defective or W W ‒ • Check the surge arrester.
the back-up fuse of the surge ar- • Check the back-up fuse of the surge
rester was tripped. arrester.
7901 Reverse current has occurred in PV 1 min D x • Contact the SMA Service Line.
array.
8701 External active power setpoints W W ‒ • Contact the SMA Service Line.
are smaller than 2 mA and there-
fore invalid. The last valid value or,
after a day change, Pmax is
used. Once valid setpoints are
available again, these will be
used.
8702 Several digital active power set- W W ‒ • Contact the SMA Service Line.
points are available.
8703 Power factor of the external reac- W W ‒ • Contact the SMA Service Line.
tive power setpoint is invalid.
8704 External active and reactive power W W ‒ • Contact the SMA Service Line.
setpoints are invalid.
9008 Doors have been opened during 30 s 1 min ‒ • Contact the SMA Service Line.
operation.
9009 Fast stop has tripped. 30 s 30 s ‒ • Eliminate error and switch fast stop back
on.
9013 This relates to a grid management 30 s 30 s ‒ • Eliminate error and switch fast stop back
shutdown. The error is reset by a on.
signal from the grid operator or
from the safety system of the grid
interconnection point.
9019 Defective fast stop 30 s C ‒ • Check the fast stop cabling.

5.4.6 Displaying Disturbance Messages for Active Power Limitation

The instantaneous value P‑WModFailStt displays errors or warnings associated with active power limitation.
Procedure:
1. Log into the user interface (see Section 7.4.1, page 66).
2. Select the instantaneous value P-WModFailStt.
Display Cause and corrective measures
Off No mode for active power limitation has been selected.
OK A mode for active power limitation has been selected and no error is present.

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SMA Solar Technology AG 5 Troubleshooting

Display Cause and corrective measures

ComFail The mode WCtlCom has been selected and the expected signal with a valid active
power limitation has been absent for at least five minutes.
Corrective measures:
• Ensure that the communication units can be accessed via the Internet.
• Ensure that the communication units are connected correctly.
• Ensure that the cabling between the communication units is ok.
AnInFail The mode WCnstNomAnIn has been selected and the value measured at the analog in-
put is less than 2 mA.
Corrective measures:
• Make sure the cable is correctly connected to the analog input.
ComInvalid The mode WCtlCom has been selected and there is invalid content in the power setpoint
information.
Corrective measures:
• Check the power specification settings.

5.4.7 Displaying Disturbance Messages for the Reactive Power Setpoint

The instantaneous value Q‑VArModFailStt displays errors or warnings relating to the reactive power setpoint.
Procedure:
1. Log into the user interface (see Section 7.4.1, page 66).
2. Select the instantaneous value Q-VArModFailStt.
Display Cause and corrective measure
Off No mode for specifying the reactive power setpoint has been selected.
OK A mode for specifying the reactive power setpoint has been selected and no error is
present.
ComFail The mode VArCtlCom or PFCtlCom has been selected and the expected signal with a
valid reactive power setpoint has been absent for at least five minutes.
Corrective measures:
• Ensure that the communication units can be accessed via the Internet.
• Ensure that the communication units are connected correctly.
• Ensure that the cabling between the communication units is ok.
AnInFail The mode VArCnstNomAnIn or PFCnstAnIn has been selected and the value mea-
sured at the analog input is less than 2 mA.
Corrective measures:
• Make sure the cable is correctly connected to the analog input.
ComInvalid The mode VArCtlCom or PFCtlCom has been selected and there is invalid content in
the power setpoint information.
Corrective measures:
• Check the power specification settings.

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6 Maintenance SMA Solar Technology AG

6 Maintenance
6.1 Safety during Maintenance
DANGER
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the product. Touching live components results in death or
serious injury due to electric shock.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch any live components.
• Observe all warning messages on the product and in the documentation.
• Observe all safety information of the module manufacturer.
• After switching off the inverter, wait at least 15 minutes before opening it to allow the capacitors to discharge
completely (see Section 4.2, page 26).

NOTICE
Property damage due to dust intrusion and moisture penetration
Dust or moisture intrusion can damage the product and impair its functionality.
• Do not open the enclosure during rainfall or when humidity exceeds the specified thresholds. The humidity
thresholds are: 15% to 95%.
• Only perform maintenance work when the environment is dry and free of dust.
• Operation of the product is only permitted when it is closed.
• Connect the external supply voltage after mounting and installing the product.
• If the installation or commissioning process is interrupted, mount all panels.
• Close and lock the enclosure.
• The product must always be closed for storage.
• Store the product in a dry and covered location.
• The temperature at the storage location must be in the specified range. The temperature range is:
−25°C to +70°C.

NOTICE
Damage to electronic components due to electrostatic discharge
Electrostatic discharge can damage or destroy electronic components.
• Observe the ESD safety regulations when working on the product.
• Wear suitable personal protective equipment for all work on the product.
• Discharge electrostatic charge by touching grounded enclosure parts or other grounded elements. Only then is
it safe to touch electronic components.

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SMA Solar Technology AG 6 Maintenance

6.2 Maintenance Schedule and Consumables

6.2.1 Notes on Maintenance Work
Adverse ambient conditions reduce maintenance intervals
Location and ambient conditions influence the maintenance intervals. Note that cleaning and corrosion protection
may be required more frequently depending on the conditions at the installation site.
• If the DC subdistribution is subject to adverse ambient conditions, it is recommended to shorten the
maintenance intervals.
• SMA recommends an optical inspection every six months to determine the maintenance requirements.

Maintenance report for maintenance

All maintenance work must be documented in a maintenance report. The maintenance report can be found in the
download area at www.SMA-Solar.com.

Consumables and maintenance materials

Only those consumables and maintenance materials not normally included in the standard equipment of an
electrically qualified person are listed. It is taken for granted that standard tools and materials such as torque
wrenches, one-contact voltage testers and wrenches will be available for all maintenance operations.

Spare parts
Only original parts or parts recommended by SMA Solar Technology AG are to be used as spare parts when
replacing components.
Spare parts can be identified via the reference designation and the circuit diagram. The spare-parts list includes
the article numbers of each spare part. For information on a specific article number, contact us (see Section 9
"Contact", page 68).

6.2.2 Maintenance Work Every 24 Months

Required maintenance materials and tools:
☐ A suitable water-free, heat-resistant lubricant
☐ A testing device approved by the manufacturer of the AC disconnection unit, e.g. TT1 by ABB
☐ Talcum, petroleum jelly or wax for maintaining the seals
☐ Use touch-up sticks, paint brushes, cans of spray paint or 2K-PUR acrylic paint in the appropriate RAL color to
repair small-area surface damage.
☐ Use touch-up paint or 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface damage.
☐ Use zinc plating with thick-layer passivation to repair damage on the zinc-plated steel frame in the base area, e.g.
LZ-09. Observe the relevant instructions of the manufacturer.
☐ Abrasive cloth
☐ Degreaser
☐ A surge arrester testing device approved by the surge arrester manufacturer

Maintenance work depending on the condition of the inverter

Maintenance with DC voltage present
Task See
Reading off error messages and warnings Section 5.2, page 30
Checking the DC switchgear Manufacturer documentation
(see Section 1.7, page 7)*

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6 Maintenance SMA Solar Technology AG

Task See
Checking the AC disconnection unit Manufacturer documentation
(see Section 1.7, page 7)*
* In deviation to the maintenance interval specified by ABB, the maintenance interval of 24 months stated in this documentation applies.

Maintenance under voltage-free conditions

Task See
Perform the visual inspection Section 6.4.2.1, page 51
Analyzing the temperature indicators Section 6.4.2.2, page 51
Cleaning the ventilation plate Section 6.4.2.3, page 53
Clean the air duct, ventilation grids and air intake. Section 6.4.2.4, page 53
Checking the interior Section 6.4.2.5, page 55
Checking the fuses/disconnection blades Section 6.4.2.9, page 58
Checking the bolted connections Section 6.4.2.10, page 58
Cleaning the heating elements of the low-temperature range option Section 6.4.1.3, page 47
Check the labels Section 6.4.2.11, page 59
Checking the inverter surface Section 6.4.2.8, page 57

Maintenance work with supply voltage present

Task See
Checking the DC switchgear Manufacturer documentation
(see Section 1.7, page 7)*
Check the fans Section 6.4.1.1, page 45
Checking the heating element and the hygrostat Section 6.4.1.2, page 46
Checking the heating element for low-temperature option Section 6.4.1.4, page 48
Checking the function of the UPS Section 6.4.1.5, page 50
* In deviation to the maintenance interval specified by ABB, the maintenance interval of 24 months stated in this documentation applies.

6.3 Repair Schedule and Spare Parts

6.3.1 Information on Repair Work
Spare parts
Only original parts or parts recommended by SMA Solar Technology AG are to be used as spare parts when
replacing components.
Spare parts can be identified via the reference designation and the circuit diagram. The spare-parts list includes
the article numbers of each spare part. For information on a specific article number, contact us (see Section 9
"Contact", page 68).

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6.3.2 Demand-Based Annual Repairs

Task Interval
Replace key switch In case of severe signs of wear
Replace surge arrester If tripped
Replace labels on the enclosure If illegible, defective or missing

Replace GFDI / ABB circuit breaker After 100 trippings due to short circuit
or
after number of switching cycles: 7000
• Contact Service.

Replace Remote Switch Unit of the GFDI Number of switching cycles: 7000
• Contact Service.

6.3.3 Repairs every 10 Years

Task Comment
Replace 24 V power supply units • Contact the Service (see Section 9, page 68).
Replace 24 V buffer modules • Contact the Service (see Section 9, page 68).
Replace the fans of the AC disconnection unit • Contact the Service (see Section 9, page 68).

Replace exterior key switch, front element and label • Contact the Service (see Section 9, page 68).

6.3.4 Repairs every 12 Years

Replacement intervals for order option "Q at Night"
The replacement intervals are halved for order option "Q at Night".

Task Comment
Replace interior fan in the inverter cabinet • Contact Service.
Replace the inverter bridge fan • Contact Service.

6.4 Maintenance Work

6.4.1 Maintenance work with supply voltage present
6.4.1.1 Checking the Fans
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

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6 Maintenance SMA Solar Technology AG

Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section 4.3.1, page 28).
☑ The fans start to run for a few moments.
✖ The fans do not start up?
• Please contact (see Section 9, page 68).

6.4.1.2 Checking the Heating Elements and Hygrostat

Figure 11: Position of the heating element and the hygrostat

Position Designation
A Hygrostat
B Heating element

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section 4.3.1, page 28).
3. Set the hygrostat to the minimum value. To do this, pull the selector switch out slightly.
Tip: the hygrostat is adjusted correctly if the relay of the hygrostat emits an audible click.

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4. Check whether the heating elements are radiating heat after a delay time of five minutes.
If the heating elements are not radiating heat, contact us (see Section 9 "Contact", page 68).
5. Reset the hygrostat to the initial value. To do this, press the selector switch back towards the hygrostat. The initial
value of the hygrostat is indicated on the hygrostat.

6.4.1.3 Inverter with Low-Temperature Option: Cleaning the Heating Elements

Figure 12: Position of the heating elements and the temperature control

Position Designation
A Heating element with low-temperature range option
B Connection plug of the temperature control

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Disassemble the protective covers (see Section 7.1.2, page 63).
2. Remove dirt and dust from the heating elements.
3. Remove moisture.
4. Mount the protective covers (see Section 7.1.2, page 63).

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6.4.1.4 Inverter with Low-Temperature Option: Checking the Heating Elements

Figure 13: Position of the heating elements and the temperature control

Position Designation
A Heating element with low-temperature range option
B Connection plug of the temperature control

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

Procedure:
1. Switch the inverter to Stop.
2. Disassemble the protective covers (see Section 7.1.2, page 63).
3. Connect the supply voltage (see Section 4.3.1, page 28).

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4. Remove the connection plug of the temperature control.

☑ The inverter switches off with an audible click. After approximately 2 minutes, the inverter audibly switches
the supply voltage off.
✖ There is no audible switching sound?
• Contact SMA Solar Technology AG.
5. Check whether the heating elements are radiating heat after a delay time of 5 minutes.
If the heating elements are not radiating heat, contact us (see Section 9 "Contact", page 68).
6. Insert the connection plug of the temperature control.

☑ The inverter switches the supply voltage on with an audible click. After approximately 2 minutes, the inverter
again emits an audible switching sound.
✖ There is no audible switching sound?
• Contact SMA Solar Technology AG.
7. Mount the protective covers (see Section 7.1.2, page 63).

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6.4.1.5 Checking the Function of the UPS

Figure 14: Positon of the UPS

Position Designation
A Uninterruptible power supply (UPS)

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section 4.3.1, page 28).
3. Measure the voltage at the supply voltage output between L1 and N.
☑ The voltage is approximately 230 V.
✖ Voltage deviates significantly?
• Contact Service.
4. Measure the voltage at the supply voltage output of the UPS at -X400 terminal 5 and -X402 terminal 5.
☑ The voltage is approximately 24 V.
✖ Voltage deviates significantly?
• Contact Service.

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5. Disconnect the supply voltage (see Section 4.2.4, page 27).

6. Measure the time until the communication unit switches off.
☑ The communication unit switches off after 15 seconds at the earliest.
✖ The communication unit switches off earlier?
• Contact SMA Solar Technology AG.

6.4.2 Maintenance Work in Disconnected State

6.4.2.1 Performing the Visual Inspection
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Check the inverter for visual defects such as discoloration, dirt, damage and scratches on the enclosure.
If visual defects are present, repair these immediately.
2. Ensure that there are no objects on or around the inverter that are flammable or that could otherwise endanger
operational safety.

6.4.2.2 Analyzing the Temperature Indicators

Depending on the type of inverter bridge, the inverter cabinet contains 8 or 17 temperature indicators which monitor
the temperature of the inverter bridges.

Figure 15: Position of the temperature indicators (example: inverter bridges with connection terminals at the upper end)

Position of the indicators Type of inverter bridges Number of indicators

1 to 17 with connection terminals at the upper 17
end
10 to 17 without connection terminals at the up- 8
per end

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If the temperature exceeds a value indicated on one of the indicator fields, that field will turn black.
A

88 B

110

93
0 4 99
1 C

Figure 16: Values on an indicator (example)

Position Description
A The indicator field for 88°C has turned black. The temperature has reached 88°C.
B The indicator field for 93°C has turned black. The temperature has reached 93°C. The
value 93 must be entered in the protocol.
C The indicator field for 99°C is white. The temperature has not exceeded 99°C.
Each time maintenance work is performed, the values of the temperature indicators must be read off and logged. The
highest value of the indicators that turned black must be entered in the maintenance report. The interactive protocol
"Temperature Indicators Analysis Protocol" can be downloaded at www.SMA-Solar.com.

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.

Requirement:
☐ The inverter must have been operated under full load for at least six hours before analyzing the values.
Procedure:
1. Ensure that the inverter is disconnected from all voltage sources.
2. Open the inverter cabinet.

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3. Read off and log the values of each temperature indicator.

4. Analyze the results and take action if necessary:
Number of the in- Value of the indi- Action
dicator cator
1 to 9 88 There is no need for action.
93 or higher Contact the Service (see Section 9 "Contact", page 68).
10 to 17 88 to 99 There is no need for action.
104 or higher Contact the Service (see Section 9 "Contact", page 68).

6.4.2.3 Cleaning the Ventilation Plate

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Disassemble the panels (see Section 7.1.1, page 62).
2. Pull the ventilation plate out of the inverter cabinet. Grip
underneath the ventilation plate and press the middle part up
while pulling it out.

3. Clean the ventilation plate with a brush or vacuum.

4. Slide the ventilation plate into the inverter cabinet. The ventilation
grid in the ventilation plate must face the rear panel.

☑ The ventilation grid ends up flush with the inverter.

✖ The ventilation plate will not go all the way in?
• Grip the ventilation plate from underneath and press the middle part upwards while sliding it in.
5. Mount the panels (see Section 7.1.1, page 62).

6.4.2.4 Cleaning the Air Duct, Ventilation Grids and Air Intake
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

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CAUTION
Danger of crushing due to heavy, unwieldy roof
The inverter roof is heavy and bulky. If you try to move the roof on your own, you run a risk of having limbs crushed.
Weight of the roof: 30 kg.
• Wear suitable personal protective equipment for all work on the product.
• Always have two persons disassemble and mount the roof.

NOTICE
Property damage due to rupture of grounding conductors
The components are connected to the inverter via the grounding conductor. If the roof is not disassembled correctly,
the grounding conductors may be pulled out.
• Take care not to damage the grounding conductors during disassembly.

Procedure:
1. Disassemble the ventilation grids (see Section 7.1.3, page 64).
2. Vacuum the air duct from the outside or clean it with a brush.

3. Vacuum the ventilation grids or clean them with a brush.

4. Check the ventilation grids for visible damage. Replace the ventilation grids, if required.
5. Pull the front edge of the roof forward and push upward.

6. Gently push the roof to the rear. In doing so, you push the roof
out of the guide rails.

7. Check whether the air intake is soiled.

8. Clean air intake if soiled:

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SMA Solar Technology AG 6 Maintenance

• Remove the grounding conductor from the inverter.

• Remove the roof and set it down on a suitable surface.

• Clean air intake with a vacuum cleaner
• Place the roof on the inverter.
• Screw the grounding conductor to the inverter (torque: 14.2 Nm).
9. Slide the roof into the guide rails on the inverter and pull forward.

10. Press the roof down.

11. Mount the ventilation grids (see Section 7.1.3, page 64).

6.4.2.5 Cleaning the Interior

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Remove dirt and dust from the inverter interior and from all devices.
2. Check the inverter for leaks.
If leaks are present, fix them.
3. Remove moisture.

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6.4.2.6 Checking the Seals

Figure 17: Section drawing with top view of a door seal (example)

Position Designation
A Seal
B Side panel
C Sealing area
D Hinge
E Door
F Frame construction

Required maintenance material (not included in the scope of delivery):

☐ A suitable water-free, heat-resistant lubricant
☐ Talcum, petroleum jelly or wax for maintaining the seals

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Check whether the seals in the sealing area show any damage.
If seals are damaged, contact us (see Section 9 "Contact", page 68).
2. Apply talcum, petroleum jelly or wax to seals. This will prevent frost damage.
3. After removing the side panels: check whether the side panel seals display any damage in the sealing area.
If seals are damaged, contact us (see Section 9 "Contact", page 68).

6.4.2.7 Checking the Latches, Door Stops and Hinges

Required maintenance material (not included in the scope of delivery):
☐ A suitable, water-free and heat-resistant lubricant, e.g. WD40
☐ Non-greasing antifreeze agent, e.g. PS88

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SMA Solar Technology AG 6 Maintenance

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Check whether the doors latch easily. Open and close the doors several times.
If the doors do not latch easily, lubricate all moving parts of the latch.
2. Check whether the stops hold the doors in place.
If the doors cannot be arrested, lubricate the door stops.
3. Check whether the door hinges move easily.
If the door hinges do not move easily, apply lubricant.
4. Lubricate all moving parts and movement points.
5. Tighten any loose screws with the appropriate torque.
6. If the inverter is installed in regions where below-freezing temperatures occur, apply the non-greasing antifreeze to
the profile cylinder of the door lock and the key switch in order to protect them from icing up.

6.4.2.8 Checking the Inverter Surface

Required maintenance material (not included in the scope of delivery):
☐ Abrasive cloth
☐ Degreaser
☐ Use touch-up sticks, paint brushes, cans of spray paint or, alternatively, 2K-PUR acrylic paint in the appropriate
RAL color to repair small-area surface damage. Observe the relevant instructions of the paint manufacturer.
☐ Use touch-up paint or alternatively 2K-PUR acrylic paint in the appropriate RAL color to repair large-area surface
damage. Observe the relevant instructions of the paint manufacturer.
☐ Use zinc plating with thick-layer passivation to repair the damage on the zinc-plated steel frame in the base area,
e.g. LZ-09. Observe the relevant instructions of the manufacturer.
Position RAL color Color
Roof RAL 7004 Signal gray
Base RAL 7004 Signal gray
Enclosure RAL 9016 Traffic white

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Remove dirt.

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6 Maintenance SMA Solar Technology AG

2. Check surfaces for damage or corrosion.

If the surfaces are damaged or corroded, repair them without delay or within three weeks at the latest.
3. To remove small-area surface damage:
• Sand the surface.
• Clean the surface with degreaser.
• Paint the surface.
4. To remove large-area surface damage:
• Sand the surface.
• Clean the surface with degreaser.
• Paint the entire surface.

6.4.2.9 Checking the Fuses/Disconnection Blades

Required maintenance material (not included in the scope of delivery):
☐ A high-temperature resistant, chemically inert special grease

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
1. Check the fuses/disconnection blades and tension springs for any discoloration or change in appearance.
If they are discolored or changed in any way, replace them.
2. Check insulation and terminals for any discoloration or change in appearance.
If insulation and terminals are discolored or changed, contact us (see Section 9 "Contact", page 68).
3. Remove fuses / disconnection blades one by one from the fuse holders. For this, use fuse extractor. It must be
possible to remove the fuse without effort.
4. Check whether the contact surfaces of the fuses / disconnection blades are free from hardened grease. Clean
contact surfaces if they are covered with hardened grease. Then apply new grease to the surfaces.
5. Insert all fuses and disconnection blades into the fuse holders. For this, use fuse extractor.

6.4.2.10 Checking the Bolted Connections of the Power Cabling

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

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SMA Solar Technology AG 6 Maintenance

NOTICE
Damage to bolted connections through overtightening
If the permitted torques are exceeded, bolted connections can be damaged. In this case, fault-free operation of the
inverter is no longer ensured.
• Only tighten loose bolted connections to the prescribed torque. Torque specifications are indicated in the
circuit diagram of the inverter. If there is any information missing, contact (see Section 9 "Contact", page 68).

Procedure:
1. Check that the bolted connections of all assemblies are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
2. Check whether all bolted connections of the power cabling are securely in place.
If bolted connections are loose, tighten them using a torque wrench.
3. Check the insulation and connections for any discoloration or change in appearance.
If insulation and connections are discolored or changed, contact us (see Section 9 "Contact", page 68).
4. Check the bolted connections for damage and contact elements for corrosion.
If bolted connections are damaged or contact elements corroded, replace them.

6.4.2.11 Checking the Labels

Inverter labels can be ordered from us as a complete set.
SMA order number Languages included
3F1-050-001-001 en, de, es, fr
3F1-050-002-001 en, el, it
3F1-050-003-001 en, ja, ko, zh
3F1-050-004-001 en, ro, tr

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6 Maintenance SMA Solar Technology AG

Figure 18: Position of the labels

Position Material number Designation

A 86-029687 Use hearing protection
B 86-05200 Beware of dangerous voltage
C 86-79615 Beware of a danger zone
D 86-10867153 Risk of electrical shock even when the device is disconnected.
86-003307 5 Safety rules
86-003314 Risk of lethal electric shock due to active power source
E 86-003303 Risk of lethal electric shock due to active power source
F 86-1086701025 Danger of burn injury due to hot fuses below the cover.

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SMA Solar Technology AG 6 Maintenance

Position Material number Designation

G 86-0043553 Risk of lethal electric shock due to active power source
H 86-003307 5 Safety rules
I 86-1086701026 The negative pole of the PV generator is grounded in the inverter.
86-1086701027 The positive pole of the PV generator is grounded in the inverter.
K 86-003304 Unintended tripping due to modified settings.
L 86-003306 Plant protected by conductors.
M 86-003305 Incorrect connection leads to destruction of the device.
N 86-1086701023 Risk of lethal electric shock due to active power source
O 86-0099 Position of grounding
P 86-1086701024 Danger of burn injury due to hot components below the cover.
Q 86-10867153 Risk of electrical shock even when the device is disconnected.

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Procedure:
• Check whether any warning message or label is damaged or missing.
Replace any warning messages and labels which are missing or illegible. If necessary, you can order labels as a
complete set. Contact us (see Section 9, page 68).

6.5 Repair Work

6.5.1 Reading off the Replacement Interval Meter
1. Log into the user interface as an installer (see Section 7.4.1, page 66).
2. Select Data > Devices.
3. Select the desired device from the list.
4. Select the tab Instantaneous values.
5. If the instantaneous value CntGfdiSw exceeds 7000, replace the Remote GFDI (see Section 9 "Contact",
page 68).
6. If the error message 7714 appears on the touch display, replace the GFDI (see Section 9 "Contact", page 68).

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7 Periodic Actions SMA Solar Technology AG

7 Periodic Actions
7.1 Mounting and Disassembly Work
7.1.1 Disassembling and Mounting the Panels
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

NOTICE
Property damage due to rupture of grounding conductors
The components are connected to the inverter via the grounding conductor. If the roof is not disassembled correctly,
the grounding conductors may be pulled out.
• Take care not to damage the grounding conductors during disassembly.

Disassembling the panels

1. Remove the screws of the front panels using a Torx screwdriver (head size T30).
2. Detach the grounding straps from the panels.
3. Remove the panels.

Mounting the panels

Requirement:
☐ The protective covers in the connection area must be mounted (see Section 7.1.2, page 63).
Procedure:
1. Attach the grounding straps to the panels of the interface cabinet (torque: 8 Nm to 10 Nm).
2. Ensure that the grounding straps are firmly in place.
3. Attach the panels using a Torx screwdriver (torque: 2 Nm to 3 Nm, head size T30).

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SMA Solar Technology AG 7 Periodic Actions

7.1.2 Disassembling and Mounting the Protective Covers

Figure 19: Position of the protective covers

Position Designation
A Protective cover

DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15 minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section 4, page 26).

Disassembling the protective covers

Requirements:
☐ The panels must be disassembled (see Section 7.1.1, page 62).
Procedure:
• Disassemble the protective covers.

Mounting the protective covers

1. Tighten all protective covers (torque: 5 Nm).
2. Ensure that the protective covers are firmly in place.

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7 Periodic Actions SMA Solar Technology AG

7.1.3 Disassembling and Mounting the Ventilation Grids

Disassembling the ventilation grids
1. Release the screws of the right-hand ventilation grid. (head size:-
T40).

2. Pull the lower side of the right-hand ventilation grid forwards to

remove it.

3. Release the screws of the left-hand ventilation grid. (head size:-

T40).

4. Pull the lower side of the left-hand ventilation grid forwards to

remove it.

Mounting the ventilation grids

1. Insert the left-hand ventilation grid.

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SMA Solar Technology AG 7 Periodic Actions

2. Screw the left-hand ventilation grid on (torque: 20 Nm,-head size

T40).

3. Insert the right-hand ventilation grid.

4. Screw the right-hand ventilation grid on (torque: 20 Nm,-head

size T40).

7.2 Entering the Password via the Touch Display

Installer access
The "Installer" access level is activated by entering the installer password. The access level is reset after 15
minutes.
Procedure:
1. Select .
2. Select .
3. Confirm your entry by selecting .
☑ The symbol appears in the status info line.

7.3 Parameter Overview

7.3.1 Accessing the Parameter Overview
1. Log into the user interface as an installer.
2. Select Data > Devices.
3. Select the desired device from the list.
4. Select the tab Parameters.

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7 Periodic Actions SMA Solar Technology AG

7.3.2 Saving Parameter Changes

Requirement:
☐ You must be logged in on the user interface.
Procedure:
1. Change the respective parameter via the field Value.
2. To adopt this value for all devices of the same type and with the same firmware version, activate the box Save
for all devices of this device type.
3. Select the button [Save].
☑ The communication unit adjusts the required value on the device(s).
4. Select the button [OK].

7.4 User Interface

7.4.1 Logging Into the User Interface
Default Network Settings for the Service Interface
IP address: 192.168.100.2
Subnet mask: 255.255.255.0
Password for the user groups "installer" and "user": sma
Identical passwords for the user groups
If your "user" password is the same as your "installer" password, you will automatically be logged in as an
installer.
Requirement:
☐ JavaScript must be enabled in your web browser (e.g. Internet Explorer).
Procedure:
1. Connect the laptop to the service interface of the inverter.
2. Start your web browser.
3. Enter the IP address of the communication unit in the address bar and press the enter key.
☑ The user interface opens.
4. To change the language, select the desired language in the field Language.
5. For registration select the user level in the field User.
6. Enter the password in the field Password.
7. Select the button [Login].

7.4.2 Logging Out of the User Interface

Always log out from the user interface when you have finished your work. If you only close the web browser, you will
not be logged out. If the user interface is left idle for 15 minutes, you will be logged out automatically.
Procedure:
• Select the button [Logout].

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SMA Solar Technology AG 8 Appendix

8 Appendix
8.1 Installation Information
8.1.1 Torques
Torques of the power connections:
Type of terminal lug Torque
Tin-plated aluminum terminal lug on copper bar 37 Nm
Tin-plated copper terminal lug on copper bar 60 Nm
Tin-plated aluminum or copper terminal lug on aluminum bar 37 Nm

Torques at panels, covers and grounding conductor:

Position Torque
Grounding conductors on the kick plates 8 Nm to 10 Nm
Mounting the kick plates 2 Nm to 3 Nm
Grounding conductor on the roof 14.2 Nm
Mounting the ventilation grids on the roof 20 Nm
Protective covers 5 Nm

8.2 Type Label

The type label clearly identifies the product. One type label is present in the inverter. The type label is located in the
right-hand top corner inside the interface cabinet. You will require the information on the type label to use the product
safely and when seeking customer support. The type labels must be permanently attached to the product.
Reading off the serial number
You can identify the serial number without opening the inverter. The serial number can be found on the roof of the
inverter at the top left. You can also read off the serial number from the touch display.

Reading Off the Firmware Version

You can read off the version number of the inverter and touch display firmware via the user interface. You can
also read off the version number of the touch display firmware on the touch display.

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9 Contact SMA Solar Technology AG

9 Contact
If you have technical problems with our products, please contact the SMA Service Line. The following data is required
in order to provide you with the necessary assistance:
• Device type
• Firmware version
• Event message
• Type of communication
• Type and size of additional energy sources
• Optional equipment, e.g. communication products
• Detailed description of the problem
Deutschland SMA Solar Technology AG Belgien SMA Benelux BVBA/SPRL
Österreich Niestetal Belgique Mechelen
Schweiz Sunny Boy, Sunny Mini Central, België +32 15 286 730
Sunny Tripower, Sunny Highpower: Luxemburg for Netherlands: +31 30 2492 000
+49 561 9522‑1499 SMA Online Service Center:
Luxembourg
Monitoring Systems, SMA EV Charger: www.SMA-Service.com
+49 561 9522‑2499 Nederland

Hybrid Controller: Česko SMA Service Partner TERMS a.s

+49 561 9522-3199 Magyarország +420 387 6 85 111
Sunny Island, Sunny Boy Storage, Slovensko SMA Online Service Center:
Sunny Backup: www.SMA-Service.com
+49 561 9522-399
Türkiye SMA Service Partner DEKOM
Sunny Central, Sunny Central Storage: Telekomünikasyon A. Ş
+49 561 9522-299 +90 24 22430605
SMA Online Service Center: SMA Online Service Center:
www.SMA-Service.com www.SMA-Service.com
France SMA France S.A.S. Ελλάδα SMA Service Partner AKTOR FM.
Lyon Κύπρος Αθήνα
+33 472 22 97 00 +30 210 8184550
SMA Online Service Center: SMA Online Service Center:
www.SMA-Service.com www.SMA-Service.com
España SMA Ibérica Tecnología Solar, S.L.U. United Kingdom SMA Solar UK Ltd.
Portugal Barcelona Milton Keynes
+34 935 63 50 99 +44 1908 304899
SMA Online Service Center: SMA Online Service Center:
www.SMA-Service.com www.SMA-Service.com
Italia SMA Italia S.r.l. Australia SMA Australia Pty Ltd.
Milano Sydney
+39 02 8934-7299 Toll free for Australia:
SMA Online Service Center: 1800 SMA AUS
www.SMA-Service.com (1800 762 287)
International: +61 2 9491 4200

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SMA Solar Technology AG 9 Contact

United Arab SMA Middle East LLC India SMA Solar India Pvt. Ltd.
Emirates Abu Dhabi Mumbai
+971 2234 6177 +91 22 61713888
SMA Online Service Center:
www.SMA-Service.com
ไทย Service Partner for String inverter: 대한민국 Enerone Technology Co., Ltd
Solar Power Engineering Co., Ltd. 4th Fl, Jungbu Bldg, 329,
333/7,8,9 United Tower Building 4th Yeongdong-daero, Gangnam-gu,
floor. Seoul, 06188, Korea
Soi Sukhumvit 55 (Thonglor 17), Klong- +82-2-520-2666
ton Nua, Wattana,
Argentina SMA South America SPA
10110 Bangkok, Thailand
+66 20598220 Brasil Santiago de Chile
Chile +562 2820 2101
smaservice@spe.co.th
Service Partner for Utility: Perú
Tirathai E & S Co., Ltd South Africa SMA Solar Technology South Africa
516/1 Moo 4, Bangpoo Industrial Es- Pty Ltd.
tate Cape Town
Sukhumvit Road, T. Praksa, A. Muang 08600SUNNY
10280 Samutprakarn, Thailand (08600 78669)
+63 1799866 International: +27 (0)21 826 0699
servicepartner.sma@tirathai.co.th SMA Online Service Center:
www.SMA-Service.com
Other coun- International SMA Service Line
tries Niestetal
00800 SMA SERVICE
(00800 762 7378423)
SMA Online Service Center:
www.SMA-Service.com

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www.SMA-Solar.com