Danfoss FLX 17 Pro Installation Manual

www.danfoss.com/solar

SOLAR INVERTERS

Installation Guide

FLX Series

MAKING MODERN LIVING POSSIBLE

Safety and Conformity

Safety Message Types

The following symbols are used in this document:

DANGER

Indicates a potentially hazardous situation which could
result in death.

WARNING

Indicates a potentially hazardous situation which could
result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which could
result in minor or moderate injury. It may also be used
to alert against unsafe practices.

NOTICE

Indicates important information, including situations
which may result in damage to equipment or property.

General Safety

All persons installing and servicing inverters must be:

•

Trained and experienced in general safety rules
for work on electrical equipment.

•

Familiar with local requirements, rules and
regulations for the installation.

NOTICE

Before installation
Check for damage to equipment and packaging. If in
doubt, contact the supplier before commencing instal­lation.

CAUTION

Installation
For optimum safety, follow the steps described in this
document. Keep in mind that the inverter has 2 voltage
carrying sides; the PV input and the AC grid.

WARNING

Disconnecting the inverter
Before starting work on the inverter, switch off AC at the
mains switch and PV using the PV load switch. Ensure
that the device cannot be unintentionally reconnected.
Use a voltage tester to ensure that the unit is discon­nected and voltage free. The inverter can still be charged
with very high voltage at hazardous levels even when it
is disconnected from AC grid and solar modules. Wait at
least 8 minutes following disconnection from grid and
PV panels before proceeding.

For safe disconnection of DC current, turn off the PV load
switch (1).

Safety and Conformity

L00410568-02_02 / Rev. date: 2013-12-10

CAUTION

Maintenance and modification
Only authorised personnel are permitted to modify the
inverter. To ensure personal safety, use only original
spare parts available from the supplier. If non-original
spare parts are used, compliance with CE guidelines in
respect of electrical safety, EMC and machine safety is
not guaranteed.
The temperature of the cooling racks and components
inside the inverter can exceed 70 ºC. Observe the danger
of burn injury.

DC voltages up to 1000 V are present in a PV system even
when the inverter is disconnected from the AC grid. Faults
or inappropriate use may lead to electric arcing.

WARNING

PV modules generate voltage when exposed to light.

WARNING

Do not work on the inverter while disconnecting DC and
AC.

The short-circuit current of the photovoltaic panels is only
slightly higher than the maximum operating current and
depends on the level of solar irradiation.

Conformity

Go to the download area at www.danfoss.com/solar,
Approvals and Certifications, for information.

See also 5 Technical Data.

CE marking - This symbol certifies the conformity of

the equipment with the requirements of the

applicable EC directives

Safety and Conformity

L00410568-02_02 / Rev. date: 2013-12-10

Contents

1 Introduction

3

1.1 Purpose of the Manual

3

1.2 Software Version

3

1.3 Spare Parts

4

1.4 Unpacking

4

1.5 Identification of Inverter

4

1.6 Installation Sequence

4

1.7 Return and Disposal

4

1.7.1 Return 5

1.7.2 Disposal 5

1.8 Overview of Installation Area

6

2 Installation

7

2.1 Environment and Clearances

7

2.2 Mounting the Mounting Plate

8

2.3 Mounting the Inverter

9

2.4 Removing the Inverter

10

2.5 Access to the Installation Area

10

2.6 AC Grid Connection

11

2.7 RS-485 or Ethernet Connections

12

2.8 Options

12

2.9 Closure

12

2.10 PV Connection

13

2.10.1 Protection Rating for PV Modules 14

3 Initial Setup and Start

15

3.1 User Interface

15

3.1.1 Operation Modes 15

3.1.2 Security Level 15

3.1.3 Preparation for Master Inverter

16

3.1.4 Manual PV Configuration 16

3.2 Display

16

3.2.1 Initial Setup via Display

17

3.2.2 Turn PV Load Switch On 20

3.2.3 Start-up 20

3.2.4 Autotest Procedure

20

3.3 Web Interface

20

3.3.1 Prepare for Setup 20

3.3.3 Setup Wizard 21

3.3.4 Web Interface 27

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3.3.5 Plant, Group and Inverter Views 28

3.3.6 Autotest Procedure 29

4 Service

30

4.1 Troubleshooting

30

4.2 Maintenance

33

5 Technical Data

34

5.1 Specifications

34

5.1.1 Inverter Specifications 34

5.2 Derating Limits

38

5.3 Conformity

38

5.4 Installation Conditions

39

5.5 Cable Specifications

40

5.6 Torque Specifications

42

5.7 Mains Circuit Specifications

43

5.8 Auxiliary Interface Specifications

43

5.9 RS-485 and Ethernet Connections

44

Contents

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1Introduction

1.1 Purpose of the Manual

The Installation Guide provides information required to
install and commission the FLX series inverter.

Additional resources available:

•

User Guide, for information required in monitoring
and setup of the inverter, via the display or web
interface.

•

Design Guide, for information required for
planning use of the inverter in a diversity of solar
energy applications.

•

CLX GM Quick Guide, for information required to
install and set up power management of the FLX
Pro inverter using the CLX GM device.

•

CLX Home Installation Manual, or CLX Home GM,
CLX Standard, CLX Standard GM Quick Guide, for

information required to install and set up
monitoring of the FLX inverter.

•

Sensor Interface Option Installation Guide, for
installation and commissioning of the sensor
interface option.

•

GSM Option Kit Installation Guide, for information
required to install a GSM option, and set up data
upload or messaging from the inverter.

•

PLA Option Guide, for information required to
install and set up PLA option for connecting radio
ripple control receiver to the inverter.

•

Fan Installation Instruction, for information
required to replace a fan.

These documents are available from the download area at
www.danfoss.com/solar, or from the supplier of the solar
inverter.

Illustration 1.1 FLX Series Inverter

The FLX series inverters feature:

•

IP65 enclosure

•

PV load switch

•

Sunclix connectors for PV input

•

Manual access via the display, for configuration
and monitoring of the inverter.

•

Ancillary service functionalities. Refer to the FLX
Series Design Guide for details.

•

Access via web interface, for configuration and
monitoring of the inverter.

1.2 Software Version

This manual is applicable for inverter software 2.05 and
onwards. To see the software version, via the display or
web interface (inverter level), go to [Status → Inverter →
Serial no. and SW ver. → Inverter].

NOTICE

Software version at manual release is 2.05. Information
about current software version is available at
www.danfoss.com/solar.

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1.3 Spare Parts

Contact Danfoss for information about spare parts, part
numbers, and ordering.

1.4 Unpacking

Contents:

•

Inverter

•

Mounting plate

•

Accessories bag, containing: 3 mounting screws, 2
cable glands, 2 rubber cups, 1 earthing screw,
and 1 security label for France.

•

4 to 6 Sunclix mating parts depending on the
number of MPPT for FLX Pro 5-17.

•

Installation guide, booklet format

•

Quick guide, poster format

The following items are not supplied:

•

Security screws, M5 x 8-12, optional (not available
as product from Danfoss)

1.5 Identification of Inverter

Illustration 1.2 Product Label

The product label on the side of the inverter shows:

•

Inverter type

•

Important specifications

•

Serial number, located under the bar code, for
inverter identification.

1.6 Installation Sequence

1. Pay special attention to 1.1 Safety Message Types.

2. Install the inverter according to 2.1 Environment
and Clearances, 2.2 Mounting the Mounting Plate
and 2.3 Mounting the Inverter.

3. Open the inverter according to 2.5 Access to the
Installation Area.

4. Install AC according to 2.6 AC Grid Connection.

5. Install RS-485 or Ethernet, if used, according to

2.7 RS-485 or Ethernet Connections.

6. Install options, if any, according to the installation
guide supplied with the option.

7. Close the inverter according to 2.5 Access to the
Installation Area.

8. Install PV according to 2.10 PV Connection.

9. Turn on AC at the mains switch.

10. Set language, master mode, time, date, installed
PV power, country, and grid code:

•

For setup via the web interface, refer to

3.3 Web Interface.

•

For setup via the display, refer to

3.2 Display.

11. Turn on PV by turning on the PV load switch.
Refer to 2.10.1 Connection of PV.

12. Verify the installation by comparing with the
autodetection result in the display, as described
in 2.10 PV Connection.

13. The inverter is now in operation.

For installation and setup of multiple FLX Pro inverters in
master-follower configuration:

•

Perform steps 2–9 and 11 for each inverter.

•

Perform step 10 on the inverter planned as
master.

•

Perform step 12.

1.7 Return and Disposal

When replacing an inverter, it can either be returned to
your distributor, to Danfoss directly, or disposed of
according to local and national regulations. Danfoss is
committed to its policy of environmental responsibility,
and therefore appeals to end users who are disposing of
inverters to follow local environmental legislation and to
seek safe, responsible means of disposal.

Introduction

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1

1.7.1 Return

For return to Danfoss, the inverter should always be in its
original packaging or equivalent packaging. If the product
is returned as a result of inverter failure, contact your
Danfoss inverter supplier.
For return shipment and details, contact Danfoss hotline.

1.7.2 Disposal

In case of end of service life, the inverter can be returned
to your distributor, to Danfoss directly, or disposed of in
the respective country. The shipping to the distributor or
Danfoss is paid by the sender. Recycling and disposal of
the inverter must be done according to the rules and
regulations applicable in the country of disposal. All the
inverter packaging material is recyclable.

Introduction

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1.8 Overview of Installation Area

PELV (Safe to touch)

1 RS-485 interface

2 Option slot A (can be used for GSM option, optional sensor interface, or PLA option)

3 Ethernet interface

4 Option slot A (can be used for GSM option, optional sensor interface, or PLA option)

Live Part

5 PV connection area

6 Communication board

7AC terminal

Other

8 Security screw position

9PV load switch

10 Security screw position

Illustration 1.3 Overview of Installation Area

Introduction

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2 Installation

2.1 Environment and Clearances

Illustration 2.1 Avoid Constant Stream of Water

Illustration 2.2 Avoid Direct Sunlight

Illustration 2.3 Ensure Adequate Air Flow

Illustration 2.4 Ensure Adequate Air Flow

Illustration 2.5 Mount on Non-flammable Surface

Illustration 2.6 Mount Upright on Vertical Surface. Tilt of up to

10 degrees is permitted

Illustration 2.7 Prevent Dust and Ammonia Gases

NOTICE

When planning the installation site, ensure that inverter
product and warning labels remain visible. For details,
refer to 5 Technical Data.

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2

2.2 Mounting the Mounting Plate

Illustration 2.8 Safe Clearances

NOTICE

Ensure 620 mm base clearance for adequate airflow.

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2

Illustration 2.9 Mounting Plate

NOTICE

Use of the mounting plate delivered with the inverter is
mandatory.

Mount the mounting plate:

•

Mount in the defined environment.

•

Use screws and rawl plugs that can safely carry
the weight of the inverter.

•

Ensure that the mounting plate is correctly
aligned.

•

Observe safe clearances when installing one or
more inverters, to ensure adequate airflow.
Clearances are specified in Illustration 2.8 and the
mounting plate label.

•

Mounting multiple inverters in a single row is
recommended. Contact the supplier for
guidelines, when mounting inverters in more
than one row.

•

Ensure adequate clearance at the front, for
service access to the inverter.

.

Illustration 2.10 Mounting the Mounting Plate

2.3 Mounting the Inverter

CAUTION

For safe handling of the inverter, 2 people must carry
the unit, or a suitable transport trolley must be used.
Wear safety boots.

Procedure:

1. Lift the inverter. Locate the slots on the side of
the mounting plate.

Illustration 2.11 Position the Inverter

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2

2

2. On the inverter, position the side screws against
the mounting plate slots.

3. Push the inverter as shown so the side screws
slide into the 2 lower slots, then the 2 upper
slots. See Illustration 2.12 and Illustration 2.13.

Illustration 2.12 Slide into Slots

Illustration 2.13 Detail of Sliding into Slot

4. Check that the 4 side screws sit securely in the
mounting plate slots.

5. Release the inverter.

Anti-theft Protection (Optional)

To protect the inverter against theft, fasten as follows:

1. Use 2 security screws, M5 x 8-12 (not supplied).

2. Insert screws through the pre-drilled anti-theft
holes (see Illustration 1.3), through the mounting
plate to the wall.

3. Tighten screws.

2.4 Removing the Inverter

Procedure:

1. Perform removal in the reverse order of
mounting.

2. Lift the inverter. 2 people must carry the unit.

3. With a firm grip at the base of the inverter, lift
and slide the inverter out of the mounting plate
slots.

4. Lift the inverter free of the mounting plate.

2.5 Access to the Installation Area

CAUTION

Observe ESD safety regulations. Discharge any electro­static charge by touching the grounded enclosure,
before handling any electronic component.

Procedure:

1. To open the cover, loosen the 2 lower front
screws using a TX 20 screwdriver. The screws
cannot fall out.

2. Lift the cover 180 degrees. A magnet holds the
cover open.

3. To close the cover, lower it into place and fasten
the 2 front screws.

Illustration 2.14 Loosen Front Screws and Lift Cover

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2.6 AC Grid Connection

Illustration 2.15 Installation Area

Illustration 2.16 AC Cable Wire Strip

On the AC cable, strip insulation on all 5 wires. The PE wire
must be longer than the mains and neutral wires. See
Illustration 2.16.

Illustration 2.17 AC Connection Area

L1, L2, L3 3 mains wires

NNeutral wire

PE1 Primary protective earth

PE2 Secondary protective earth

1. Verify that the inverter rating matches the grid.

2. Ensure that main circuit breaker is released, and
take precautions to prevent reconnection.

3. Open the front cover.

4. Insert the cable through the AC gland to the
terminal blocks.

5. Connect the 3 mains wires (L1, L2, L3), the
neutral wire (N) and the protective earth wire (PE)
to the terminal block with the respective
markings.

6. Optional: Make an extra PE connection at the
secondary PE earthing points.

7. All wires must be properly fastened with the
correct torque. See 5.6 Torque Specifications.

CAUTION

Check that all wiring is correct. Connecting a phase wire
to the neutral terminal may permanently damage the
inverter.

NOTICE

Tighten all screws and glands thoroughly.

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2

2

NOTICE

This product may generate DC current exceeding 6 mA,
into the external grounded PE wire. Where a residual
current-operated protective (RCD) or monitoring (RCM)
device is used for protection in case of direct or indirect
contact, only an RCD or RCM of Type B is allowed on the
supply side of this product. When applying an RCD it
must have a 300 mA sensitivity to avoid tripping. IT
systems are not supported.

NOTICE

For fuse and RCD information, refer to 5 Technical Data.

2.7 RS-485 or Ethernet Connections

Before connecting RS-485 or Ethernet cables, refer to
requirements in 5.9 RS-485 and Ethernet Connections.

Procedure:

1. Do not remove the RJ-45 connector.

2. Guide the cables through the base of the inverter
via cable glands. See Illustration 2.18.

3. Plug into the RS-485 or Ethernet connector.

4. Fasten cables with cable ties to ensure a durable
connection over time. See Illustration 2.19.

Illustration 2.18 Guide Through Cable Glands

Illustration 2.19 Fasten with Cable Ties

NOTICE

Tighten all screws and glands thoroughly.

2.8 Options

To install options, refer to the respective option installation
guide.

NOTICE

Tighten all screws and glands thoroughly.

2.9 Closure

1. Close the cover of the inverter installation area.
Fasten the 2 front screws.

2. Turn on AC power.

Installation

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2

2.10 PV Connection

WARNING

PV modules generate voltage when exposed to light.
Do NOT connect PV to earth.

Illustration 2.20 Do Not Connect PV to Earth

Use a suitable voltmeter that can measure up to 1000 V
DC.

1. Mount Sunclix connectors (not supplied) on the
PV cables, according to Illustration 2.21.

2. Verify the polarity and maximum voltage of the
PV arrays by measuring the PV open-circuit
voltage. See Illustration 2.21.

•

The PV open-circuit voltage must not
exceed 1000 V DC. The inverter is
protected against reversed polarity and
will not generate power until the
polarity is correct. Reversed polarity
damages neither the inverter nor the
connectors.

Illustration 2.21 Correct Polarity: Mounting Sunclix Connector

on Cable

1. Measure the DC voltage between the positive
terminal of the PV array and earth (or the green/
yellow PE cable).

•

The voltage measured should
approximate zero. If the voltage is
constant and not zero, there is an
insulation failure somewhere in the PV
array.

2. Locate and fix the failure before continuing.

3. Repeat this procedure for all arrays. Uneven distri­bution of input power on the PV inputs is
permitted, if:

•

The individual input is not overloaded.
The maximum permissible load per
input is 8000 W.

•

The maximum short-circuit current of
the PV modules at STC (Standard Test
Conditions) does not exceed 13.5 A per
input.

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2

2

CAUTION

PV installation
Unused PV inputs may not be short-circuited.

Illustration 2.22 DC Connection Area

1. On the inverter turn the PV load switch into off
position.

2. Connect the PV cables using Sunclix connectors.
Ensure correct polarity, see Illustration 2.21.

•

Attach Sunclix mating part to PV cable.

•

Connect to each PV input in the PV
connection area with a 'click'.

Illustration 2.23 Connect to PV Input

2.10.1 Protection Rating for PV Modules

The inverter must only be operated with PV modules of
protection class II, compliant to IEC 61730, application class
A.
Module voltage rating must be more than 480 V (typical
module voltage rating is 1000 V). This does not prevent
the use of strings with lower operating voltage.
Only connect PV modules to the inverter. Other energy
sources are not allowed.

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3 Initial Setup and Start

3.1 User Interface

The user interface comprises:

•

Local display. Enables manual setup of the
inverter.

•

Web interface. Enables access to multiple
inverters via Ethernet.

Choose an interface to set up and start the inverter, either
via

•

Display

3.2 Display

3.2.1 Initial Setup via Display

or

•

Web interface

3.3 Web Interface

3.3.4 Web Interface

Do not touch the other interface during the setup and
start-up processes.

For access and menu information, refer to the FLX Series
User Guide.

3.1.1 Operation Modes

The inverter has 4 operation modes, indicated by LEDs.
For more information on the LEDs, refer to the FLX Series
User Guide.

Off grid (LEDs off)
When no power has been delivered to the AC grid for
more than 10 minutes, the inverter disconnects from the
grid and shuts down. 'Off grid - standby' is the default
night mode. 'Off grid - sleep' is the night mode for lowest
energy consumption.

•

Off grid - standby mode (LEDs off)

The inverter is disconnected from grid. User and
communication interfaces remain powered for
communication purposes.

•

Off grid - sleep mode (LEDs off)

The inverter is disconnected from grid. User,
communication, and option interfaces are
powered down.

Connecting (Green LED flashing)
The inverter starts up when the PV input voltage reaches
250 V. The inverter performs a series of internal self-tests,
including PV autodetection and measurement of the

resistance between the PV arrays and earth. Meanwhile, it
also monitors the grid parameters. When the grid
parameters have been within the specifications for the
required amount of time (depends on grid code), the
inverter starts to energise the grid.

On grid (Green LED on)
The inverter is connected to the grid and energises the
grid. The inverter disconnects when:

•

it detects abnormal grid conditions (dependent
on grid code), or

•

an internal event occurs, or

•

insufficient PV power is available (no power is
supplied to the grid for 10 minutes).

The inverter then enters connecting mode or off grid
mode.

Fail Safe (Red LED flashing)
If the inverter detects an error in its circuits during the self­test (in connecting mode) or during operation, the inverter
goes into fail safe mode, disconnecting from grid. The
inverter will remain in fail safe mode until power has been
absent for a minimum of 10 minutes, or the inverter has
been shut down completely (AC+PV).

3.1.2 Security Level

3 predefined security levels filter user access to menus and
options.

Security levels:

•

Level [0]: General access. No password is required.

•

Level [1]: Installer or service technician. Password
access required.

•

Level [2]: Installer or service technician. Password
extended access required.

Throughout the manual, a [0], [1] or [2] inserted after the
menu item indicates the minimum security level required
for access.

When logged on to the web interface as Admin, access is
at security level [0].

Access to levels [1] and [2] requires a service logon,
comprising a user ID and a password.

Initial Setup and Start

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3

3

•

The service logon provides direct access to a
specific security level for the duration of the
current day.

•

Obtain the service logon from Danfoss.

•

Enter the logon via the display, or the web
interface logon dialog.

•

When the service task is complete, log off at
[Setup → Security].

•

The inverter automatically logs the user off after
10 minutes of inactivity.

Security levels are similar on the display and the web
interface.
A security level grants access to all menu items at the
same level as well as all menu items of a lower security
level.

3.1.3 Preparation for Master Inverter

The master mode feature allows 1 inverter to be appointed
as master inverter for the inverter network.
The master inverter accesses the other inverters in the
network, enabling:

•

Settings and data replication to the rest of the
network, enabling easy commissioning and data
management.

•

Control of power at plant level (control of
ancillary services).

•

Data retrieval from the network, for graphical
display on the web interface, upload to a data
warehouse, or export to a PC.

Before enabling master mode, ensure that the following
requirements are met:

•

No other master inverters are present in the
network.

•

Ethernet connection from PC to inverter RJ-45
interface, using a patch cable (network cable
cat5e, crossed or straight through). See 2.7 RS-485
or Ethernet Connections.

•

Installed sensor interface option, with sensors
installed, when sensor data are required.

•

Location closest to the router, in a daisy chain
network topology.

After enabling master mode, perform a network scan to
verify that all follower inverters are connected to the
master inverter. To initiate the scan, go to [Setup →
Inverter details → Master mode → Network].

3.1.4 Manual PV Configuration

Set up the inverter for manual PV configuration:

•

Via the display, security level 1, at [Setup → Setup
details → PV configuration].

•

Via the web interface, security level 0, at [Inverter
level: Setup → Setup details → PV configuration].

When the inverter is set to manual PV configuration, the
autodetection is subsequently overridden.

To set the configuration manually via the display:

1. Turn on AC to start the inverter.

2. Obtain the installer password from the distributor.
Go to [Setup → Security → Password], and enter
the password.

3.

Press [Back]. Use the arrows to navigate to [Setup
→ Setup details → PV configuration].

4.

Select manual PV configuration mode, at: [Setup
→ Setup details → PV configuration → Mode:
Manual].

5. Set up the PV input configuration to match the
wiring, at: [Setup → Setup details → PV configu­ration].

•

PV input 1: Individual, Parallel or Off

•

PV input 2: Individual, Parallel or Off

•

PV input 3: Individual, Parallel or Off

3.2 Display

NOTICE

The display activates up to 10 seconds after power up.

The integrated display on the inverter front gives the user
access to information about the PV system and the
inverter.

The display has 2 modes:

1.

Normal: The display is in use.

2.

Power saving: After 10 minutes of display
inactivity the back light of the display turns off to
save power. Reactivate the display by pressing
any key.

Initial Setup and Start

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Illustration 3.1 Overview of Display Buttons and Functionality

Key Function LED

F1

View 1/View 2 - Screen

When keys F1-F4 are

selected, the LED above

the key will light up

F2

Status Menu

F3

Production Log Menu

F4

Setup Menu

Home

Return to View Screen

OK

Enter/select

Arrow up

A step up/increase value

Arrow

Down

A step down/decrease

value

Arrow Right

Moves cursor right

Arrow Left

Moves cursor left

Back

Return/de-select

On - Green

LED

On/flashing = On grid/

Connecting

Alarm - Red

LED

Flashing = Fail safe

The inverter is

configured as master.

This icon appears in the

top right corner.

The inverter is a

follower, connected to a

master. This icon

appears in the top right

corner.

Table 3.1 Overview of Display Buttons and Functionality

NOTICE

The contrast level of the display can be altered by
pressing the arrow up/down button while holding down
the F1 button.

The menu structure is divided into 4 main sections:

1.

View - presents a short list of information, read
only.

2.

Status - shows inverter parameter readings, read
only.

3.

Log - shows logged data.

4.

Setup - shows configurable parameters, read/
write.

See the following sections for more detailed information.

3.2.1 Initial Setup via Display

The inverter is shipped with a predefined set of settings
for different grids. All grid-specific limits are stored in the
inverter and must be selected at installation. It is always
possible to see the applied grid limits in the display.
After installation, check all cables and then close the
inverter.
Turn on AC at the mains switch.
IP address can be found in the display during commis­sioning.

When prompted by the display select language. This
selection has no influence on the operating parameters of
the inverter and is not a grid code selection.

Illustration 3.2 Select Language

The language is set to English at initial start-up. To change
this setting press the [OK] button. Press [

▼

] to scroll down

through the languages. Select language by pressing [OK].

Initial Setup and Start

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3

NOTICE

To use the default language (English) simply press the
[OK] button twice to select and accept.

Illustration 3.3 Master Mode

To enable master mode go to the Inverter details menu
[Setup → Inverter details → Master mode] and set master
mode to Enabled.

Illustration 3.4 Set Time

Set time as prompted by the display. Press [OK] to select
number. Press [

▲

] to scroll up through the numbers. Select
by pressing [OK].
The clock is 24-hour format. The inverter accounts for
daylight saving automatically.

NOTICE

Set the time and date accurately. The inverter uses this
information for logging. If an incorrect time/date is
accidentally set, correct it immediately in the set date
and time menu [Setup → Inverter details → Set date and
time].

Illustration 3.5 Set Date

Set date as prompted by the display. Press [OK] to select.
Press [

▲

] to scroll up through the numbers. Select by

pressing [OK].

Illustration 3.6 Installed PV Power

Enter the amount of installed PV power for each of the PV
inputs. When a group of PV inputs are connected in

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3

parallel, enter average installed PV power for each PV
input, as shown in the examples.

PV String Configuration

Enter this value for

“Installed PV power”

Example 1: PV1, PV2 and PV3 are each set

to individual mode.

Nominal PV power installed:

PV 1: 6000 W PV 1: 6000 W

PV 2: 6000 W PV 2: 6000 W

PV 3: 3000 W PV 3: 3000 W

Example 2: PV1 and PV2 are set to

parallel mode and have a total of 10 kW

PV power installed. PV3 is set to

individual mode and has nominal 4 kW

PV power.

PV 1: 5000 W

PV 2: 5000 W

PV 3: 4000 W

Example 3: PV1 and PV2 are set to

parallel mode and have a total of 11 kW

PV power installed. PV3 is set to [Off] and
has no PV installed.

PV 1: 5500 W

PV 2: 5500 W

PV 3: 0 W

Table 3.2 Examples of Installed PV Power

The display will now show ‘Select country’. The setting is
‘undefined’ at initial start-up. Press [▼] to scroll down
through the list of settings. To select the desired setting,
press [OK].

Illustration 3.7 Select Country

Illustration 3.8 Select Grid Code

The display will now show ‘Select grid code’. The grid code
is set to ‘undefined’ at initial start-up. To select the grid
code, press [OK]. Press [

▼

] to scroll down through the list.
Select the grid code for the installation by pressing [OK]. It
is very important to choose the correct grid code.

Illustration 3.9 Confirm Grid Code Selection

To confirm, select the grid code again and press [OK]. The
settings for the chosen grid code have now been
activated.

WARNING

Correct selection of grid code is essential to comply with
local and national standards.

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3

NOTICE

If the 2 grid code selections do not match, they will be
cancelled and it will be necessary to repeat this step. If
an incorrect grid code is accidentally accepted at the
first selection, simply accept the “Grid: Undefined” in the
confirm grid code screen. This cancels the grid code
selection and enables a new selection.

NOTICE

Access on security level 2 is granted for 5 hours after
setup completion. Logout must be performed before
leaving the site. If an incorrect grid code is selected
twice, it can be changed within the 5 hours. Access on a
higher level is possible by locking the configuration and
logging on again using a 24-hour password. Only
authorised personnel is allowed to configure the
inverter. Changes will be logged and Danfoss accepts no
liability for damage caused by changing the inverter
configuration.

3.2.2 Turn PV Load Switch On

Illustration 3.10 Turn the PV Load Switch On

3.2.3 Start-up

The inverter starts automatically if sufficient solar
irradiation is available. The start-up will take a few minutes.
During this period, the inverter performs a self-test.

NOTICE

The inverter is protected against reversed polarity. The
inverter does not generate power until any reversed
polarity is corrected.

3.2.4 Autotest Procedure

For certain grid codes, an automatic test of the inverter
can be initialised by activating the inverter autotest
procedure:

•

Via the display, go to [Setup → Autotest] and
press [OK].

3.3 Web Interface

These instructions describe the web interface, which
facilitates remote access to the inverter.
Refer to the download area at www.danfoss.com/solar for
the newest instructions.

For all text entries, the software supports characters
compatible with Unicode.

For inverter name, no spaces are permitted.

For plant, group and inverter name, only the following
characters are supported:

Letters abcdefghijklmnopqrstuvwxyz

Capital letters ABCDEFGHIJKLMNOPQRSTUVWXYZ

Numbers 0123456789

Special

characters

- _.

3.3.1 Prepare for Setup

Ensure that the following items are ready before
commencing setup:

•

Master inverter is designated and prepared, see

3.1.3 Preparation for Master Inverter.

•

Ethernet connection from PC to inverter is
established, see also 2.7 RS-485 or Ethernet
Connections.

3.3.2 Initial Setup via Web Interface

CAUTION

Change the Web Server logon and password of the
master inverter immediately for optimal security when
connecting to the Internet. To change the password go
to [Setup → Web Server → Admin].

Setup Sequence

1. Ensure that the master inverter is designated and
prepared, see 3.1.3 Preparation for Master Inverter.

2. On the PC, wait until Windows reports limited
connectivity (if no DHCP is present). Open the
Internet browser and ensure that pop-ups are
enabled.

3. Type 1 of the following options in the address
field:

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•

For Windows XP and older Windows
versions: http://invertername, where
'invertername' is the final 10 digits of
the serial number.

•

For Windows 7 and newer Windows
versions: http://IP address. The IP
address can be found in the display.

It is not possible to use the installation wizard with
Windows 7 and 8.

Find the serial number marked on the product label on the
side of the inverter enclosure. See Illustration 1.2.

1. The web interface logon dialog opens.

2. Type 'admin' in the user and password fields, and
click ‘Log in’.

3. At initial logon the inverter runs a setup wizard.

3.3.3 Setup Wizard

Step 1 of 8: Display language

Select display language.

•

The default language is English.

NOTICE

This selection defines the language in the display, not
the grid code.

Illustration 3.11 Step 1 of 8: Display Language

To change the language setting later, go to [Setup → Setup Details].

Step 2 of 8: Master setting

To set up a master inverter, click on ‘Set as master’.

•

A scan runs to identify inverters in the network.

•

A pop-up window shows the inverters successfully identified.

Click [OK] to confirm that the correct number of inverters has been found.

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3

Illustration 3.12 Step 2 of 8: Master Setting

To change this setting later, go to [Inverter level: Setup → Inverter details].

Step 3 of 8: Time and date

Enter:

•

Time in 24-hour format

•

Date

•

Time zone

Accuracy is important, because date and time are used for logging purposes. Adjustment for daylight savings is automatic.

Illustration 3.13 Step 3 of 8: Time and Date

To change these settings later, go to [Inverter level: Setup → Set date and time].

Step 4 of 8: Installed power

For each PV input, enter installed PV power.

The installed PV power values are used to calculate performance ratio. For more information refer to the FLX Series Design
Guide.

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3

CAUTION

Incorrect setting can have serious consequences for
production efficiency.

Illustration 3.14 Step 4 of 8: Installed Power

To change the installed power, go to [Inverter level: Setup → Calibration, PV Array].

Step 5 of 8: Country of Installation

Select the setting to match the location of the installation.

CAUTION

Correct selection is essential to comply with local and
national standards.

Illustration 3.15 Step 5 of 8: Country of Installation

Step 6 of 8: Grid code

Select the grid code to match the location of the installation.

Initial Setup and Start

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3

3

•

The default setting is [undefined].

Select the grid code again, to confirm.

•

The setting is activated immediately.

CAUTION

Correct selection is essential to comply with local and
national standards.

Illustration 3.16 Step 6 of 8: Grid Code

NOTICE

If the initial and confirmation settings are different,

•

grid code selection is cancelled, and

•

the wizard recommences step 5.

If initial and confirmation settings match, but are
incorrect, contact service.

Step 7 of 8: Replication

This step is available for a master inverter with followers connected. To replicate the settings from steps 1–6 to other
inverters in the same network:

•

Select inverters.

•

Click [Replicate].

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3

NOTICE

When the PV configuration, installed PV power and PV
array area of follower inverters in the network differ
from that of the master, do not replicate. Set up the
follower inverters individually.

Illustration 3.17 Step 7 of 8: Replication

Step 8 of 8: Inverter start-up

The wizard displays an overview of the setup configuration.
Click on [Finish] to start up the inverter. Start-up will commence when solar irradiation is sufficient.
The start-up sequence, including self-test, takes a few minutes.

Initial Setup and Start

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3

Illustration 3.18 Step 8 of 8: Inverter start-up

To change the setup later, access the inverter via the web interface or the display, at inverter level.

•

To change the name of the inverter, go to [Inverter level: Setup → Inverter details].

•

To enable master mode, go to [Inverter level: Setup → Inverter details].

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3.3.4 Web Interface

The web interface overview is structured as follows.

Illustration 3.19 Overview

1.

Plant name: Displays the current plant name:

•

Click on the plant name to display the
plant view.

•

Change the plant name at [Setup →
Plant details].

2.

Group menu: Displays groups of inverters:

•

Inverters join group 1 by default.

•

Click on a group name to display the
group view, and a list of inverters in the
group.

•

Change the group name via [Setup →
Inverter details] in the inverter view.

3.

Group members: Displays the inverter names in
the group currently selected. The default inverter
name is based on the serial number.

•

Click on an inverter name to display the
inverter view.

•

Change the name of the inverter via
[Setup → Inverter details] in the inverter
view.

4.

Main menu: This menu corresponds to the
inverter display main menu.

5.

Submenu: The submenu corresponds to the main
menu item currently selected. All submenu items
belonging to a particular main menu item are
displayed here.

6.

Content area: The main menu and submenus of
the web interface are identical to the menus in
the inverter display. The submenu content
displayed here corresponds to the submenu
selected: [Overview]. On some pages, a horizontal
menu is provided for improved readability.

7.

Footer: Options in the footer bar:

•

Language: Opens a pop-up window.

Click on the country flag to change the
language of the web interface to the
desired language for the active session.

•

Contact: Opens a pop-up window,

which displays Danfoss contact
information.

•

Logout: Opens the login/logout dialog

box.

•

Security level: Displays the current

security level as explained in the section
Security Levels.

Initial Setup and Start

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3

NOTICE

The content of the main menu changes depending on
which view is currently selected: the plant, a group of
inverters, or an individual inverter.

3.3.5 Plant, Group and Inverter Views

The overview screens for plant view, group view, and
inverter view display the same overall status information.

Illustration 3.20 Overall Plant Status

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3

Item Unit View Description

Plant and

Group

Inverter

Overall plant status - x

Red: Plant PR <50%, or:

Any inverter in the network

- in fail safe mode, or

- missing from the scan list, no contact with the master

Yellow: Any inverter in the network

- with PR <70%, or

- in Connecting or Off grid mode

Green: Plant PR ≥70%, and

- all inverters with PR ≥70%, and

- all inverters in On grid mode

x

Red: Inverter PR <50%, or inverter has an error

Yellow: Inverter PR between 51% and 70%, or inverter in Connecting

mode

Green: No errors, and

- inverter PR ≥70%, and

- inverter in On grid mode

Current production kW x x Real time energy production level

Yield today kWh x x Cumulative yield for the day

Total revenue Euro x x Cumulative revenue earned since initial startup

Total CO

2

saving kg x x Cumulative CO2 saved since initial startup

Performance ratio % x x Real time performance ratio

Total yield kWh x x Cumulative yield since initial startup

Power limit adjustment % x Maximum power limit as % of nominal inverter AC output rating

Table 3.3 Information Displayed in Plant View, Overview Screen

NOTICE

To calculate performance ratio PR, an irradiation sensor
is required, see [Setup → Calibration].

3.3.6 Autotest Procedure

For certain grid codes, an automatic test of the inverter
can be initialised by activating the inverter autotest
procedure:

•

Via the web interface, go to [Inverter level: Setup
→ Setup details → Autotest] and click on [Start →
Test].

Initial Setup and Start

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3

4Service

4.1 Troubleshooting

This guide provides tables showing messages appearing in
the inverter display, known as events. The tables contain
descriptions as well as which actions to take, when an
event arises. For the full event list, refer to the FLX Series

User Guide.

To view events, go to the Log menu and enter the
Eventlog menu. The latest event registered by the inverter,
as well as a list of the 20 most recent events, is shown

here. When the inverter enters the On grid mode, the most
recent event is cleared and is shown as 0.
The event code is made up of 2 elements: the group
classifier and the event ID. The group classifier describes
the general type of the event, while the event ID is used
to identify the specific event.
Table 4.1 is an overview of how the tables of inverter
events are constructed and how to use them.

Event Type

-

ID Status message Description Action DNO Hotline PV

201 Tpower_high. The internal temperature of the

inverter is too high.

Check the inverter is not covered and that the

ventilation duct is not blocked. If not, call installer.

-x -

Table 4.1 How to Read the Event Tables

Event Type

Indicates whether the event relates to grid, PV, internal or fail safe issues.

ID

The specific event ID.

Display

Text shown in display.

Description

Description of the event.

Action

Description of which action to take prior to contacting any other parties.

DNO

If the prescribed action has not identified the malfunction, contact the DNO for further assistance.

Hotline

If the prescribed action has not identified the malfunction, contact the inverter hotline for further assistance.

PV

If the prescribed action has not identified the malfunction, contact the PV supplier for further assistance.

Grid-related Events

ID Status

message

Description Action DNO Hotline PV

1–6 Grid voltage too low. Call the installer and inform about the grid-phase voltage.

Check voltage and AC installation, if the voltage is zero

check the fuses.

x- -

7–9 Grid voltage average over 10

minutes too high.

Call the installer and inform about the grid-phase voltage.

Check that the installation is correct according to the instal-

lation guide. If so, then increase the mean voltage limit
according to section Functional Safety.

x- -

10–15 Grid voltage too high.

Call the installer and inform about the grid-phase voltage.

Check voltage and AC installation.

x- -

16–18 The inverter has detected a

voltage peak on the grid.

x- -

19–24 Grid frequency too low or too

high.

Call the installer and inform about the grid frequency.. x - -

25–27 Loss of mains, Phase-to-phase

voltages too low.

Call the installer and inform about the voltage on all three

phases.

Check the phase-to-phase voltages and the AC installation.

x- -

28–30 Loss of mains, ROCOF out of

range.

If the event reoccurs several times each day, contact the

DNO.

x- -

31–33 DC grid current too high. For occurrence several times daily, contact installer.

Installer: Perform on-site grid analysis.

-x -

Service

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4

ID Status

message

Description Action DNO Hotline PV

34–37 Residual Current Monitoring Unit

(RCMU) has measured an

excessive current.

Turn both DC and AC off and wait until the display turns

off. Then turn on DC and AC and observe if the event

reoccurs. If the event reoccurs, call the installer.

Installer: Visual inspection of all PV cables and modules.

-x -

40 AC grid notOKThe AC grid has been out of

range for more than 10 minutes

(frequency and/or voltage).

Call the installer and inform about Frequency, SW version

and Grid code setting

Installer: Check the AC installation.

x- -

41–43 The inverter has detected that

grid voltage was below a certain

level.

If this event is reported several times each day, contact the

installer.

Installer: Perform on-site grid analysis.

47 PLA below

threshold

The inverter disconnects from

grid if PLA is below 3% of

nominal power.

Contact the DNO and obtain status on active power

reduction (PLA).

x- -

48–53 Grid

frequency

too low or

too high

Call the installer and inform about the grid frequency.

Check the AC installation.

x- -

54–56 DC grid current too high (stage

2).

For occurrence several times daily, contact installer.

Installer: Perform on-site grid analysis.

x- -

246 A grid event was detected and

inverter was stopped by the

redundant safety circuit.

A grid event was detected and inverter was stopped by the

redundant safety circuit. Check the event log. If the majority

of entries are of type 246, call the service department.
Otherwise wait 24 hours and check again.

-x -

Table 4.2 Grid-related Events

PV-related Events

ID Status

message

Description Action DNO Hotline PV

100-102 PV negative Input current is negative, polarity

incorrect.

Call the installer.

Installer: Check polarity, if correct, call service.

-- x

103-105 PV current is

too high/
waiting.

Too many PV modules connected in

parallel. Should only appear on newly
installed systems.

Call the installer.

Installer: Check no. of strings in parallel and
current ratings. Has the current limit been

exceeded? Has the inverter derated on PV

current? Reconnect strings in parallel, possibly
install a second inverter.

-x x

112-114 PV config fault Call the installer.

Installer: Call service.

-- x

115 PV ISO too low The resistance between ground and

PV is too low for the inverter to start

up. This will force the inverter to make

a new measurement after 10 minutes

have passed.

Make a visual inspection of all PV cables and

modules for correct installation according to

the installation guide. The event could indicate

that the PE connection is missing.

-x x

116-118 PV wrong polarity Call the installer.

Installer: Call service.

-x x

121-123,

125

PV ISO low PV1, PV2, PV3, multiple

(related to 115)

Call the installer.

Installer: Call service.

-x x

258 PV voltage too

high/waiting

PV voltage is too high. Check that installation and layout correspond

to recommendations in the manuals.

-x x

Table 4.3 PV-related Events

Service

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4

Internal Events

ID Status

message

Description Action DNO Hotline PV

201–208 The internal temperature of the

inverter is too high.

Check the inverter is not covered and that the

ventilation duct is not blocked. If not, call the

installer.

-x -

209, 210 Voltage on DC bus is too high. Reset the inverter by disconnecting DC and AC,

using the switches. If the event is repeated, call

the installer. Installer:
Check the maximum PV voltage using the display

to see if it is above the limits.

-x -

211 Fan rpm low Fan speed is too low. Is the inverter fan blocked?

Yes: Clean the fan, No: Call the installer.

-x -

212 DC bus

balance

timeout

Inverter unable to balance DC bus. Call the installer.

Installer: Call service.

-x -

213–215 Internal error Voltage measured

before and after the relay differs by

more than 20 V.

Call the installer.

Installer: Call service.

-x -

216–221 Current measured on AC side is too

high.

Call the installer.

Installer: Call service.

-x -

224 RCMU over

range

A wire is broken in the RCMU. Call the installer.

Installer: If self-test does not complete

successfully, call service partner.

-x -

225–240 Failure in Memory/ EEPROM. Restart the inverter. If event persists, call the

installer.
Installer: Call service.

-x -

241, 242,

249

Internal communication error. - x -

243, 244 Internal error. -x -

247 FSP plausi-

bility fault

A plausibility fault has occurred in

the functional safety processor.

Check event log for other grid events (1-55) and

follow the instructions for these events. If the

event persists, call the installer.

-x -

248, 251 Self test failed

FSP fail safe

The self-test has failed. - x -

252-254 Current measured on AC side is too

high.

Call the installer.

Installer: Call service.

-x -

255–257 Islanding protection trip. Call the installer.

Installer: Call service.

-x -

260 The resistance between ground and

PV is too low for the inverter to start

up. This will force the inverter to

make a new measurement after 10

minutes have passed.

Call the installer.

Installer: Call service.

-x -

261-262 PV current measurements failed. Call the installer.

Installer: Call service.

-x x

Table 4.4 Internal Events

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Events Caused by the Self-test

ID Description Action DNO Hotline PV

264-271 Measurement circuit test failed. Restart the inverter. If event persists, call the installer.

Installer: Call service.

-x -

352 RCMU self-test failed. Call the installer.

Installer: Call service.

-x -

353 Current sensor test failed. -x -

356-363 Transistor and relay test failed, or inverter

relay has failed (contact assumed welded).

-x -

364 Neutral connection is damaged or missing. Call the installer. Installer: Check AC installation for failures

on neutral connection. Call service.

-x -

365 Earth wire failed. Call the installer.

Installer: Call service.

-x -

Table 4.5 Events Caused by the Self-test

4.2 Maintenance

Normally, the inverter needs no maintenance or
calibration.

Ensure that the heat sink at the rear of the inverter is not
covered.

Clean the contacts of the PV load switch once per year.
Clean by cycling the switch to on and off positions 10
times. The PV load switch is located at the base of the
inverter.

For correct operation and long service life, ensure free air
circulation

-

around the heat sink at the top and side of the
inverter where the air exhausts, and

-

to the fan at the inverter base.

To clear obstructions, clean using pressurised air, a soft
cloth, or a brush.

WARNING

Temperature of the heat sink can exceed 70 °C.

Service

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4

5 Technical Data

5.1 Specifications

5.1.1 Inverter Specifications

Nomen­clature

Parameter

FLX series

56789

AC

|S| Rated apparent

power

5 kVA 6 kVA 7 kVA 8 kVA 9 kVA

P

ac,r

Rated active power

1)

5 kW 6 kW 7 kW 8 kW 9 kW

Active power at

cos(phi)=0.95

4.75 kW 5.7 kW 6.65 kW 7.6 kW 8.55 kW

Active power at

cos(phi)=0.90

4.5 kW 5.4 kW 6.3 kW 7.2 kW 8.1 kW

Reactive power

range

0 - 3.0 kVAr 0 - 3.6 kVAr 0 - 4.2 kVAr 0 - 4.8 kVAr 0 - 5.4 kVAr

V

ac,r

Nominal AC voltage

(AC voltage range)

3P+N+PE - 230/400 V (+/- 20 %)

Rated current AC 3 x 7.2 A 3 x 8.7 A 3 x 10.1 A 3 x 11.6 A 3 x 13 A

I

acmax

Max. current AC

3 x 7.5 A 3 x 9.0 A 3 x 10.6 A 3 x 12.1 A 3 x 13.6 A

AC current distortion

(THD at nominal
output power, %)

-----

Inrush current 9.5 A / 10 ms

cosphi

ac,r

Power factor at

100% load

>0.99

Controlled power

factor range

0.8 over-excited

0.8 under-excited

Standby

consumption

2.7 W

f

r

Nominal grid

frequency (range)

50 (

±

5 Hz)

DC

Max. PV input power

per MPPT

5.2 kW 6.2 kW 7.2 kW 8 kW

Nominal power DC 5.2 kW 6.2 kW 7.2 kW 8.3 kW 9.3 kW

V

dc,r

Nominal voltage DC

715 V

V

dcmin

/

V

mppmin

-

V

mppmax

MPP voltage - active

tracking

2)

/ rated

power

3)

220/250 - 800 V 220/260 - 800 V 220/300 - 800 V 220/345-800 V 220/390 - 800 V

MPP efficiency, static 99.9%

MPP efficiency,

dynamic

99.7%

V

dcmax

Max. DC voltage

1000 V

V

dcstart

Turn on voltage DC

250 V

V

dcmin

Turn off voltage DC

220 V

I

dcmax

Max. MPP current

12 A per PV input

Technical Data

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5

Nomen­clature

Parameter

FLX series

56789

Max. short-circuit

current DC (at STC) 13.5 A per PV input

Min. on grid power 20 W

Efficiency

Max. efficiency - 97.8% - 97.9% -

Euro efficiency, V at

dc,r

- 96.5% - 97.0% -

Other

Dimensions (H, W,

D), inverter / incl.
packaging

667 x 500 x 233 mm / 774 x 570 x 356 mm

Mounting

recommendation

Mounting plate

Weight, inverter /

incl. packaging

38 kg / 44 kg

Acoustic noise level

4

-

MPP trackers 2

Operation

temperature range

-25..60 °C

Nom. temperature

range

-25..45 °C

Storage temperature

-25..60 °C

Overload operation Change of operating point

Overvoltage

categories

Grid: OVC III

PV: OVC II

Table 5.1 Specifications

1)

At rated grid voltage (V

ac,r

), Cos(phi)=1.

2)

To utilise the full range, asymmetrical layouts must be considered

including start-up voltage for at least 1 string. Achieving nominal

power will depend on configuration.

3)

At symmetric input configuration.

4)

SPL (Sound Pressure Level) at 1 m under normal operating

conditions. Measured at 25 °C.

Nomen­clature

Parameter

FLX series

10 12.5 15 17

AC

|S| Rated apparent

power

10 kVA 12.5 kVA 15 kVA 17 kVA

P

ac,r

Rated active power

1)

10 kW 12.5 kW 15 kW 17k W

Active power at

cos(phi)=0.95

9.5 kW 11.9 kW 14.3 kW 16.2 kW

Active power at

cos(phi)=0.90

9.0 kW 11.3 kW 13.5 kW 15.3 kW

Reactive power

range

0 - 6.0 kVAr 0-7.5 kVAr 0-9.0 kVAr 0-10.2 kVAr

V

ac,r

Nominal AC voltage

(AC voltage range)

3P+N+PE - 230/400 V (+/- 20 %)

Rated current AC 3 x 14.5 A 3 x 18.2 A 3 x 21.7 A 3 x 24.7 A

Technical Data

L00410568-02_02 / Rev. date: 2013-12-10 35

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Nomen­clature

Parameter

FLX series

10 12.5 15 17

I

acmax

Max. current AC

3 x 15.1 A 3 x 18.8 A 3 x 22.6 A 3 x 25.6 A

AC current distortion

(THD at nominal

output power, %)

-<2 %

Inrush current 0.5 A / 10 ms

cosphi

ac,r

Power factor at

100% load

>0.99

Controlled power

factor range

0.8 over-excited

0.8 under-excited

Standby

consumption

2.7 W

f

r

Nominal grid

frequency (range)

50 (

±

5 Hz)

DC

Max. PV input power

per MPPT

8 kW

Nominal power DC 10.4 kW 12.9 kW 15.5 kW 17.6 kW

V

dc,r

Nominal voltage DC

715 V

V

dcmin

/

V

mppmin

-

V

mppmax

MPP voltage - active

tracking

2)

/ rated

power

3)

220/430 - 800 V 220/360 - 800 V 220/430 - 800 V 220/485 - 800 V

MPP efficiency, static 99.9%

MPP efficiency,

dynamic

99.7%

V

dcmax

Max. DC voltage

1000 V

V

dcstart

Turn on voltage DC

250 V

V

dcmin

Turn off voltage DC

220 V

I

dcmax

Max. MPP current

12 A per PV input

Max. short-circuit

current DC (at STC) 13.5 A per PV input

Min. on grid power 20 W

Efficiency

Max. efficiency 98%

Euro efficiency, V at

dc,r

97.0% 97.3% 97.4% 97.4%

Other

Dimensions (H, W,

D), inverter / incl.

packaging

667 x 500 x 233 mm / 774 x 570 x 356 mm

Mounting

recommendation

Mounting plate

Weight, inverter /

incl. packaging

38 kg / 44 kg 39 kg / 45 kg

Acoustic noise level

4

-55 dB(A)

MPP trackers 2 3

Operation

temperature range

-25..60 °C

Nom. temperature

range

-25..45 °C

Technical Data

36 L00410568-02_02 / Rev. date: 2013-12-10

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Nomen­clature

Parameter

FLX series

10 12.5 15 17

Storage temperature

-25..60 °C

Overload operation Change of operating point

Overvoltage

categories

Grid: OVC III

PV: OVC II

Table 5.2 Specifications

1)

At rated grid voltage (V

ac,r

), Cos(phi)=1.

2)

To utilise the full range, asymmetrical layouts must be considered

including start-up voltage for at least 1 string. Achieving nominal

power will depend on configuration.

3)

At symmetric input configuration.

4)

SPL (Sound Pressure Level) at 1 m under normal operating

conditions. Measured at 25 °C.

Parameter FLX series

Connector type Sunclix

Parallel mode Yes

Interface Ethernet (Web interface), RS-485

Options GSM Option Kit, Sensor Interface Option, PLA Option

PV Sweep Yes

Overload operation Change of operating point

Grid supportive functionality Fault ride-through

Active power control

5)

Integrated, or via external device

Reactive power control

5)

Yes

DC short-circuit protection Yes

Table 5.3 Inverter Features and Functionalities

5)

Remote control via external device.

Parameter FLX series

Electrical

Safety (protective class) Class I (grounded)

PELV on the communi-

cation and control card

Class II

Overvoltage categories Grid: OVC III

PV: OVC II

Functional

Islanding detection - loss

of mains

•

Disconnection

•

3-phase monitoring

•

ROCOF

Voltage magnitude Disconnection, included

Frequency Disconnection, included

DC content of AC current Disconnection, included

Insulation resistance Connection prevented, included

RCMU - Type B Disconnection, included

Table 5.4 Safety Specifications

Technical Data

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5.2 Derating Limits

To ensure that the inverters can produce the rated power,
measurement inaccuracies are taken into account when
enforcing the derating limits stated in Table 5.5.

(Limit = rated value + tolerance).

FLX series

5 6 7 8 9 10 12.5 15 17

Grid current, per phase 7.5 A 9.0 A 10.6 A 12.1 A 13.6 A 15.1 A 18.8 A 22.6 A 25.6 A

Grid power, total 5150 W 6180 W 7210 W 8240 W 9270 W 10300 W 12875 W 15450 W 17510 W

Table 5.5 Derating Limits

5.3 Conformity

FLX series

International

Standards

5 6 7 8 9 10 12.5 15 17

Directive LVD 2006/95/EC

Directive EMC 2004/108/EC

Safety IEC 62109-1/IEC 62109-2

Integrated PV load switch VDE 0100-712

Functional Safety IEC 62109-2

EMC immunity

EN 61000-6-1

EN 61000-6-2

EMC emission

EN 61000-6-3

EN 61000-6-4

Utility interference EN 61000-3-2/-3 EN 61000-3-11/-12

CE Yes

Utility characteristics

IEC 61727

EN 50160

S0 Energy Meter (option) EN62053-31 Annex D

Table 5.6 International Standards Compliance

Technical Data

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5.4 Installation Conditions

Parameter Specification

Temperature

−

25 °C - +60 °C (for temperature derating see the FLX Series Design Guide.)

Relative humidity 95 % (non-condensing)

Pollution degree PD2

Environmental class according to IEC IEC60721-3-3

3K6/3B3/3S3/3M2

Air quality - general ISA S71.04-1985

Level G2 (at 75% RH)

Air quality - coastal, heavy industrial and agricultural zones Must be measured and classified acc. to ISA S71.04-1985

Vibration 1G

Observe product ingress protection class IP65

Max. operating altitude 2000 m above sea level.

PELV protection is effective up to 2000 m above sea level only.

Installation Avoid constant stream of water.

Avoid direct sunlight.

Ensure adequate air flow.

Mount on non-flammable surface.

Mount upright on vertical surface.

Prevent dust and ammonia gases.

The FLX inverter is an outdoor unit.

Table 5.7 Conditions for Installation

Parameter Condition Specification

Mounting plate Hole diameter 30 x 9 mm

Alignment

Perpendicular

±

5° all angles

Table 5.8 Mounting Plate Specifications

5.4.1 France UTE Requirements

NOTICE

In France, observe the UTE C 15-712-1 and NF C 15–100
requirements.

For installation in France, apply warning label to front of
inverter.

Illustration 5.1 Warning Label

Technical Data

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5.5 Cable Specifications

NOTICE

Avoid power loss in cables greater than 1% of the
nominal inverter rating by following the values stated in
the tables and illustrations.

NOTICE

Table states only cable lengths less than 100 m.

Specification FLX series

AC cable maximum

length [m]

AC cable size 5 6 7 8 9 10 12.5 15 17

2.5 mm

2

43 m 36 m 31 m 27 m 24 m 21 m

1) 1) 1)

4 mm

2

69 m 57 m 49 m 43 m 38 m 34 m 27 m

2) 2)

6 mm

2

86 m 74 m 64 m 57 m 52 m 41 m 34 m 30 m

10 mm

2

95 m 86 m 69 m 57 m 51 m

16 mm

2

92 m 81 m

AC cable type 5-wire copper cable

AC cable outer diameter 18-25 mm

AC cable insulation strip Strip 16 mm length of insulation from all 5 wires

PE cable diameter Equal to or greater than diameter of AC phase cables

Table 5.9 AC Cable Specifications

1)

Using cable with a diameter less than 4 mm2 is not recommended.

2)

Using cable with a diameter less than 6 mm2 is not recommended.

Specification FLX series

DC cable type

Min. 1000 V, 13.5 A

DC cable length

DC cable size 4 mm

2

- 4.8 Ω /km

< 200 m*

DC cable size 6 mm

2

- 3.4 Ω /km

200-300 m*

Mating connector Sunclix PV-CM-S 2,5-6(+) / PV-CM-S 2,5-6(-)

Table 5.10 DC Cable Specifications

* The distance between inverter and PV array and back, plus the

cumulative length of the cables used for PV array installation.

Consider also the following when choosing cable type and
cross-sectional area:

•

Ambient temperature

•

Layout type (inside wall, under ground, free air
etc.)

•

UV resistance

Technical Data

40 L00410568-02_02 / Rev. date: 2013-12-10

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Illustration 5.2 FLX Series 5, Cable Losses [%] versus Cable

Length [m]

Illustration 5.3 FLX Series 6, Cable Losses [%] versus Cable

Length [m]

Illustration 5.4 FLX Series 7, Cable Losses [%] versus Cable

Length [m]

Illustration 5.5 FLX Series 8, Cable Losses [%] versus Cable

Length [m]

Illustration 5.6 FLX Series 9, Cable Losses [%] versus Cable

Length [m]

Illustration 5.7 FLX Series 10, Cable Losses [%] versus Cable

Length [m]

Technical Data

L00410568-02_02 / Rev. date: 2013-12-10 41

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Illustration 5.8 FLX Series 12.5, Cable Losses [%] versus Cable

Length [m]

Illustration 5.9 FLX Series 15, Cable Losses [%] versus Cable

Length [m]

Illustration 5.10 FLX Series 17, Cable Losses [%] versus Cable

Length [m]

5.6 Torque Specifications

Illustration 5.11 Overview of Inverter with Torque Indications

1

Parameter Tool Tightening Torque

1M16 cable gland

body

Wrench 19 mm 3.75 Nm

M16 cable gland,

compression nut

Wrench 19 mm 2.5 Nm

2M25 cable gland

body

Wrench 27 mm 7.5 Nm

M25 cable gland,

compression nut

Wrench 27 mm 5.0 Nm

3 Front screw Torx TX 20 1.5 Nm

Table 5.11 Nm Specifications 1

Technical Data

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Illustration 5.12 Overview of Inverter with Torque Indications

2

Parameter Tool Tightening Torque

1M32 cable gland

body

Wrench 42 mm 7.5 Nm

2M32 cable gland,

compression nut

Wrench 42 mm 5.0 Nm

3Terminals on AC

terminal block

Pozidriv PZ2 or

Straight slot 1.0 x

5.5 mm

2.0 - 4.0 Nm

4 PE Torx TX 20 or

Straight slot 1.0 x

5.5 mm

2.2 Nm

Table 5.12 Nm Specifications 2

5.7 Mains Circuit Specifications

FLX series

5 6 7 8 9 10 12.5 15 17

Maximum inverter current, I

acmax

7.5 A 9 A 10.6 A 12.1 A 13.6 A 15.1 A 18.8 A 22.6 A 25.6 A

Recommended blow fuse type gL/gG

*)

10 A 13 A 13 A 13 A 16 A 16 A 20 A 25 A 32 A

Recommended automatic fuse type B or C

*)

16 A 16 A 16 A 20 A 20 A 20 A 25 A 25 A 32 A

Table 5.13 Mains Circuit Specifications

*)

Always choose fuses according to national regulations.

5.8 Auxiliary Interface Specifications

Interface Parameter Parameter Details Specification

RS-485 and Ethernet Cable

Cable jacket diameter (

⌀

)

2x5-7 mm

Cable type Shielded Twisted Pair (STP CAT 5e or

SFTP CAT 5e)

2)

Cable characteristic impedance 100 Ω – 120

Ω

RJ-45 connectors:

2pcs RJ-45 for RS-485

2pcs RJ-45 for Ethernet

Wire gauge 24-26 AWG (depending on mating

metallic RJ-45 plug)

Cable shield termination Via metallic RJ-45 plug

Galvanic interface insulation Yes, 500 Vrms

Direct contact protection Double/Reinforced insulation Yes

Short-circuit protection Yes

RS-485 only Cable Max. cable length 1000 m

Max. number of inverter

nodes

63

Ethernet only Communication Network topology Star and daisy chain

Cable Max. cable length between

inverters

100 m

Max. number of inverters

100

1)

Table 5.14 Auxiliary Interface Specifications

1)

Max. number of inverters are 100. If GSM modem is used for portal

upload, the number of inverters in a network is limited to 50.

2)

For outdoor use, we recommend outdoor burial type cable (if

buried in the ground) for both Ethernet and RS-485.

Technical Data

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Illustration 5.13 Auxiliary Interfaces

5.9 RS-485 and Ethernet Connections

RS-485

Terminate the RS-485 communication bus at both ends.

•

Termination is automatic when no RJ-45 plug is
inserted into the socket. The absence of a mating
connector enables both termination and bias.

•

In rare cases, bias is unwanted, but termination is
required. To terminate the RS-485 bus, mount a
100 Ω termination resistor into an RJ-45 field
mountable connector. Then insert the connector
(with resistor) into the unused RJ-45 connector.

The RS-485 address of the inverter is unique, and defined
at the factory.

Illustration 5.14 RJ-45 Pinout Detail for RS-485

1.

GND

2. GND

3.

RX/TX A (-)

4. BIAS L

5. BIAS H

6.

RX/TX B (+)

7. Not connected

8. Not connected

Bold = Compulsory, Cat5 cable contains all 8 wires.

For Ethernet: 10Base-TX and 100Base-TX auto cross-over.

Technical Data

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Illustration 5.15 RJ-45 Pinout Detail for Ethernet

Pinout

Ethernet

Colour Standard

Cat 5

T-568A

Cat 5

T-568B

1. RX+ Green/white Orange/white

2. RX Green Orange

3. TX+ Orange/white Green/white

4. Blue Blue

5. Blue/white Blue/white

6. TX- Orange Green

7. Brown/white Brown/white

8. Brown Brown

5.9.1 Network Topology

The inverter has 2 Ethernet RJ-45 connectors enabling the
connection of several inverters in a line topology as an
alternative to the typical star topology. The 2 ports are
similar and may be used interchangeably. For RS-485, only
linear daisy chain connections can be used.

NOTICE

Ring topology is not permitted.

Illustration 5.16 Network Topology

1Linear Daisy Chain

2Star Topology

3 Ring Topology (not permitted)

(4) (Ethernet Switch)

NOTICE

The 2 network types cannot be mixed. The inverters can
only be connected in networks which are either solely
RS-485 or solely Ethernet.

NOTICE

Ethernet is recommended for faster communication.
RS-485 is required when a weblogger or datalogger is
connected to the inverter.

Technical Data

L00410568-02_02 / Rev. date: 2013-12-10 45

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Danfoss Solar Inverters A/S

Nordborgvej 81
DK-6430 Nordborg
Denmark
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.danfoss.com/solar

Rev. date 2013-12-10 Lit. No. L00410568-02_02

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
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