Kostal PIKO MP plus series User manual

PIKO MP plus
Installation and
Operation manual

Legal notice
KOSTAL Solar Electric GmbH
Hanferstraße 6
79108 Freiburg i. Br.
Germany
Phone [phone] - 100
Fax [phone] - 111
www.kostal-solar-electric.com
Proper use
The inverter converts direct current into alternating current. This can be used as follows:
n For self-consumption
n For feed-in into the public grid
The device may only be used in grid-connected photovoltaic systems within the permissible power range
and under the permissible ambient conditions. The device is not intended for mobile use.
Inappropriate use may lead to injury or even death for the user or third parties. Material damage to the device
and other equipment can also occur. The inverter may therefore only be used for its intended purpose.
All components fitted on the inverter or in the PV system must satisfy the standards and guidelines that ap-
ply in the country of installation.
Exclusion of liability
Any use that diers from that described under „Proper use“ or goes beyond the stated intended purpose, is
considered inappropriate. The manufacturer accepts no liability for any damage resulting from this. Modifica-
tions to the inverter are prohibited. The inverter may only be used if it is safe to operate and is in a technically
perfect condition. Any instance of misuse will result in the termination of the warranty, guarantee and general
liability of the manufacturer.
Only a qualified electrician may open the device. The inverter must be installed by a trained electrician (ac-
cording to DIN VDE 1000-10 or BGV A3 accident prevention regulations or an internationally comparable
standard) who is responsible for observing the applicable standards and regulations.
Work that could aect the electrical power system of the relevant energy supply company at the site of the
solar power feed-in, may only be carried out by qualified electricians expressly authorised (licensed) by the
energy supply company. This includes changes to the factory-preset parameters. The installer must always
observe the regulations of the energy supply company.
Factory settings may only be changed by qualified electrical installers or persons with at least comparable or
higher technical qualifications, e.g. foremen, technicians or engineers. When doing so, all requirements are to
be observed.
IMPORTANT INFORMATION
The inverter may only be installed, maintained and repaired by a trained and qualified electrician.
The electrician is responsible for ensuring that the applicable standards and regulations are observed and
implemented. Work that could aect the electrical power system of the relevant energy supply company
at the site of the solar power feed-in, may only be carried out by qualified electricians expressly authorised
(licensed) by the energy supply company.
This includes changes to the factory-preset parameters.

EN
© 2018 KOSTAL Solar Electric GmbH 3
Table of contents
1General information ...................................................................5
1.1 Accessories ..........................................................................................................5
1.2 Documents ...........................................................................................................5
1.3 Liability, warranty..................................................................................................5
1.4 Contact .................................................................................................................5
1.5 Monitoring portal...................................................................................................6
1.6 EU Declaration of Conformity ...............................................................................6
2Abbreviations .............................................................................6
3Safety ..........................................................................................6
3.1 Designated use.....................................................................................................6
3.2 Target group .........................................................................................................7
3.3 General safety instructions ...................................................................................7
3.4 Labels and symbols..............................................................................................8
3.4.1 Safety marks.........................................................................................................8
3.4.2 Keywords..............................................................................................................8
3.4.3 Signs, labels and safety marks on the device.......................................................9
4Description .................................................................................9
4.1 Scope of delivery ..................................................................................................9
4.2 Structure of the device........................................................................................10
4.3 Connections........................................................................................................10
4.4 Exemplary connection ........................................................................................10
4.5 Connections, communication, and DC/AC..........................................................11
4.6 Connection cables ..............................................................................................11
4.7 Display................................................................................................................12
4.8 Cooling ...............................................................................................................12
4.9 Grid monitoring ...................................................................................................12
4.10 Data communication...........................................................................................12
4.10.1 "COM1" and "COM2"..........................................................................................12
4.10.2 Modbus RTU data connecting cable...................................................................13
4.10.3 Alternative RS485 data connecting cable...........................................................13
4.10.4 LAN.....................................................................................................................13
4.11 Connection peculiarities......................................................................................14
4.12 Data display........................................................................................................14
4.12.1 Data storage .......................................................................................................14
5Installation ................................................................................15
5.1 Safety instructions for assembly and installation ................................................15
5.2 Mounting the inverter..........................................................................................16
5.3 Preparing AC connection....................................................................................17
5.3.1 Residual current circuit breaker ..........................................................................17
5.3.2 AC cables ...........................................................................................................17
5.3.3 Assembling the AC plug .....................................................................................18
5.3.3.1 Preparing cables.................................................................................................18
5.3.3.2 Fitting cable to AC plug.......................................................................................18

EN
4 © 2018 KOSTAL Solar Electric GmbH
5.4 Preparing DC connection....................................................................................20
5.5 Connecting inverter and switching AC on ...........................................................21
6Dismounting the inverter .........................................................22
6.1 Switching AC and DC off ....................................................................................22
6.2 Opening the AC plug ..........................................................................................23
6.3 Removing inverter from mounting plate..............................................................23
7Initial commissioning...............................................................23
7.1 Performing initial commissioning ........................................................................23
7.2 Finishing the initial commissioning......................................................................23
7.3 Setting the feed-in management.........................................................................24
7.3.1 Connecting energy meter ...................................................................................24
7.3.2 Selecting an energy meter..................................................................................24
7.3.3 Limiting the dynamic feed-in value......................................................................24
7.4 Switching DC on .................................................................................................24
8Operation ..................................................................................25
8.1 Operating buttons ...............................................................................................25
8.2 Functions of the operating buttons......................................................................25
8.3 Menu structure....................................................................................................27
8.4 Navigating the menu structure............................................................................27
9Faults ........................................................................................28
9.1 Event message type ...........................................................................................28
10 Maintenance and care.............................................................. 29
11 Disposal ....................................................................................29
12 Technical data ..........................................................................29
12.1 PIKO MP plus 1.5-1, 2.0-1, 2.5-1, 3.0-1 and 3.6-1..............................................29
12.2 PIKO MP plus 3.0-2, 3.6-2 and 4.6-2..................................................................32

EN
© 2018 KOSTAL Solar Electric GmbH 5
1 General information
These instructions contain information for the safe use of the inverter and all the infor-
mation that a specialist needs for setting up, and the operator needs for operating the in-
verter.
The PIKO MP plus inverters are available in various models for different power classes.
Except for the PIKO MP plus 3.0-2, 3.6-2 and 4.6-2, all the inverters are designed to be
connected to one PV generator. The PIKO MP plus 3.0-2, 3.6-2, and 4.6-2 inverters are
suitable for the connection to two PV generators.
The PIKO MP plus inverters are available in the following models:
•PIKO MP plus 1.5-1
•PIKO MP plus 3.6-1
•PIKO MP plus 2.0-1
•PIKO MP plus 3.6-2
•PIKO MP plus 2.5-1
•PIKO MP plus 4.6-2
•PIKO MP plus 3.0-1
•PIKO MP plus 3.0-2
1.1 Accessories
Ask for possible accessories, options, suitable PV generators, and installation material at
the installer's or at KOSTAL Solar Electric GmbH.
1.2 Documents
Data sheets, country tables, and certificates are available in the download area of the
KOSTAL Solar Electric GmbH homepage.
1.3 Liability, warranty
The conditions for the device are available for downloading on the KOSTAL Solar Electric
GmbH homepage: www.kostal-solar-electric.com > Download > PIKO MP plus > Model >
Country > Warranty.
1.4 Contact
In the event of complaints or faults, please contact your local dealer, where you purchased
the product, or apply to our Service Hotline. They will assist you in all respects.
Country
Phone
Email
Germany [phone] - 222 [e-mail]
Switzerland [phone] [e-mail]
France [phone] [e-mail]
Greece
[phone]
[e-mail]
Italy [phone] [e-mail]
Spain [phone] [e-mail]
Turkey [phone] [e-mail]
China [phone]-7999 [e-mail]

EN
6 © 2018 KOSTAL Solar Electric GmbH
1.5 Monitoring portal
The KOSTAL (PIKO) Solar Portal monitoring portal of KOSTAL Solar Electric GmbH offers
online monitoring of the PV system at no charge: www.kostal-solar-portal.com
1.6 EU Declaration of Conformity
The products described in this document comply with the applicable European directives.
The certificate is available in the download area of our homepage.
2 Abbreviations
Abbreviation
Description
AC Alternating Current
DC Direct Current
LAN Local Area Network
MPP
M
aximum
P
ower
P
oint
MPP tracker Regulates the power of the connected module strings to the MPP
PV Photovoltaics (technology for the conversion of solar energy into
electrical energy)
RTU
R
emote
T
erminal
U
nit
SELV
S
afety
E
xtra
L
ow
V
oltage
TCP/IP
T
ransmission
C
ontrol
P
rotocol/
I
nternet
P
rotocol
3 Safety
3.1 Designated use
The PIKO MP plus inverters are intended for single-phase feed-in and are suitable for in-
door and outdoor installation on a wall.
Only use the inverter:
•for grid-connected PV generators.
•for PV generators whose connections are not grounded.
•for solar modules with Class A rating in accordance with IEC 61730 because the in-
verter does not have any galvanic isolation.
•when the maximum permissible system voltage of the PV generator is higher than the
AC grid voltage.

EN
© 2018 KOSTAL Solar Electric GmbH 7
3.2 Target group
Unless otherwise noted, the target group for these instructions are specialists and opera-
tors. The following persons are considered specialists:
•Persons that have knowledge of the established terms and skills for setting up and oper-
ating PV generators.
•Persons that due to their knowledge and experience are able to evaluate the following
tasks and recognise possible hazards:
- Mounting electrical equipment
- Assembling and connecting data cables
- Assembling and connecting power supply cables
3.3 General safety instructions
•This document must be kept to hand at the site of use of the inverter.
In case of a change of ownership pass on the document with the inverter.
•This document must have been read and understood in full before installing and using
the inverter.
•Do not commission the inverter before a shut-down control or overcurrent protective de-
vice has been installed.
•Incorrectly connected components may cause damage to the inverter.
•If one of the following components is damaged, immediately take the inverter out of op-
eration and disconnect it from the grid and the PV generators:
- Inverter (not functioning, visible damage, smoke, penetration of liquid etc.)
- Cables
- PV generators
•Do not switch on the system again until it has been repaired and checked by a suitably
qualified and authorised technical specialist.
•Dangerous voltages may be present for up to 10 minutes after disconnecting the in-
verter from the voltage sources.
•Disconnect inverter from both voltage sources (power grid and PV generator) prior to
any work on the inverter.
•Always carry out the measures described in this document in the specified sequence.
•Do not change nor remove any factory-applied labels on the inverter.
•Do not open the inverter. Danger to life! Opening the inverter will also void any warranty.
•Do not cover the inverter.
•Keep children away from the inverter.
•Follow the instructions of manufacturers of the connected components.
•Follow the general and national safety and accident prevention regulations.
Due to its design, the inverter cannot generate a feed-in current.

EN
8 © 2018 KOSTAL Solar Electric GmbH
3.4 Labels and symbols
3.4.1 Safety marks
The following safety marks are used on the inverter and in these instructions:
Warning sign
Nature of the danger
Warning of hazardous voltage
Warning of hazardous area
Warning of hot surface
Disposal information (separate collection of electrical and electronic
equipment)
3.4.2 Keywords
The following keywords are used in these instructions:
Keyword
Meaning
DANGER Indicates a hazardous situation which, if not avoided, leads to death or
serious injuries.
WARNING Indicates a potentially hazardous situation which, if not avoided, may
lead to death or serious injuries.
NOTE Indicates a potentially hazardous situation which, if not avoided, may
lead to damage to property and/or the environment.

EN
© 2018 KOSTAL Solar Electric GmbH 9
3.4.3 Signs, labels and safety marks on the device
Manufacturer address
"Protection Class II" symbol
Technical data of the AC output
Standard for grid monitoring
Barcode (for internal purposes)
Degree of protection
Technical data of the DC input
Item number and product name
Disposal information (separate collection of electrical and electronic equipment)
Request to disconnect the power sources prior to any intervention
Note on presence of voltage after switching off the inverter
Serial number (barcode and plain text)
Warning of voltage (two voltage sources)
Warning of hot surface
Follow the instructions
4 Description
4.1 Scope of delivery
Inverter
Mounting plate
AC plug
DC plug (one pair per DC connection)
Sealing cap (3 units)
Installation and operating instructions

EN
10 © 2018 KOSTAL Solar Electric GmbH
4.2 Structure of the device
Case
Display (monochrome, 128 x 64 pixels)
Operating buttons (for function refer to chapter 8)
Connections
4.3 Connections
4.4 Exemplary connection
Connection of evaluation system
Data logger / other inverters
Connection of energy meter at the mains connection
Mains connection
Solar generator (2 ea. in the case of PIKO MP plus x-2)

EN
© 2018 KOSTAL Solar Electric GmbH 11
4.5 Connections, communication, and DC/AC
LAN (RJ45 socket)
COM2 (RJ45 socket)
COM1 (RJ45 socket)
AC connection
DC connection, '-' terminal* (DC input,
MPP tracker 2)
DC connection, '+' terminal* (DC input,
MPP tracker 2)
DC connection, '-' terminal (DC input,
MPP tracker 1)
DC connection, '+' terminal (DC input,
MPP tracker 1)
DC disconnector (interrupts the plus and minus
inputs simultaneously)
* only in case of PIKO MP plus x-2
4.6 Connection cables
Pin assignment of alternative RS485 data connecting cable.
Device
Inverter
Solar-Log
WEB'log1)
Kiwigrid
Signal
Connection
COM1/COM2
Terminal block
RJ12
Terminal
block

Contact
1 1 2 A Data A
2 4 4 B Data B
3 - - - -
4 - - - -
5 - - - -
6 - - - -
7 - - - -
8 3 6 GND Ground
NOTE
1) Contact 1 of the RJ12 socket supplies 24 V DC!
The RS485 input of the inverter may be damaged.
►Never connect the alternative data connecting cable to contact 1.

EN
12 © 2018 KOSTAL Solar Electric GmbH
4.7 Display
The display shows the menus of the inverter.
The backlight of the display is switched on by pressing any button. The operating states of
the inverter are shown as follows:
Display
Meaning
The inverter is processing large data volumes.
It is not possible to enter user data
Backlight flashing red
with event message
Fault
4.8 Cooling
The inverter may heat up during operation. This is a normal operating characteristic. A fan
disperses the waste heat inside the closed case evenly onto the case surface. Cooling fins
allow the heat to dissipate to the surrounding.
4.9 Grid monitoring
The grid monitoring in the device permanently monitors the grid parameters of the public
grid. If the grid monitoring detects a deviation of the grid parameters from the statutory re-
quirements, the device switches off automatically. When the public grid meets the statutory
requirements again, the device switches on again automatically.
4.10 Data communication
•"LAN" connection (1) (Ethernet for TCP/IP network) for the communication with a central
data server.
•"COM1" connection (2) (RS485 bus) for the communication with external devices, e.g.
with a data logger.
•"COM2" connection (3) (Modbus RTU) for the communication with e.g. an external en-
ergy meter.
4.10.1 "COM1" and "COM2"
The inverter can communicate with other device via the "COM1" and "COM2" connections.
Requirements for the communication:
•Both ends of the data connection are terminated.
•RJ45 standard cables or alternative data connecting cables are used as bus cables.
For further information on connecting further master devices and further inverters refer to
the document 'Technical Information' in the download area on the KOSTAL Solar Electric
GmbH homepage.

EN
© 2018 KOSTAL Solar Electric GmbH 13
"COM2"
The inverter is able to communicate with energy meters (Modbus RTU) via the "COM2"
connection. To do this, the energy meter must meet the following requirements:
•The energy meter has been programmed in the inverter.
•The energy meter measures the draw from the grid in positive direction (refer to instruc-
tions of the energy meter).
4.10.2 Modbus RTU data connecting cable
NOTE
Voltage may cause property damage.
►Only have specialists manufacture the alternative data connecting cable.
►Only use suitable outdoor patch cables for outdoor installations.
Use a RJ45 standard cable or a CAT5 patch cable as data connecting cable. For further
information on the plug connection of the Modbus RTU data connecting cable refer to the
document 'Technical Information' in the download area on the KOSTAL Solar Electric
GmbH homepage.
4.10.3 Alternative RS485 data connecting cable
Use a CAT 5 cable for the alternative data connecting cable in the case of long data con-
necting distances.
For further information on the data connecting cable, the RS485 termination and the pin
assignment of the alternative RS485 data connecting cable refer to the document 'Tech-
nical Information' in the download area on the KOSTAL Solar Electric GmbH homepage.
4.10.4 LAN
Automatic start of the transmission of unencrypted data.
After establishing the network connection, the inverter automatically starts
data transmission to the server. If automatic transmission is not wanted:
►Remove network cable.
Or:
►Deactivate data transmission in "Settings" > "Network".
Via the "LAN" connection, the inverter can send yield data and event messages to the
server of a web portal. The web portal allows the graphical representation of the yield data.
With the monitoring portal KOSTAL (PIKO) Solar Portal, permanently free of charge, online
monitoring of PV generators is easy and comfortable.
►
In the menu "Settings" > "Network", the operator can enter network param-
eters in further submenu masks; refer to the document 'Technical Infor-
mation' in the download area on the KOSTAL Solar Electric GmbH
homepage.

EN
14 © 2018 KOSTAL Solar Electric GmbH
4.11 Connection peculiarities
When "Italy" has been set in the country selection, the "COM1" or "COM2" connection
must be wired in accordance with the CEI 0-21 standard. For a detailed description refer to
the document 'Technical Information' in the download area on the KOSTAL Solar Electric
GmbH homepage.
4.12 Data display
The following data are shown on the display:
•voltage and current generated by the PV generator
•power and current fed into the public grid
•current voltage and frequency of the public grid
•generated energy yields on a daily, monthly and annual basis
•current error states and notes
•Information on the version of the device
4.12.1 Data storage
In the internal memory (EEPROM), event messages and energy yields are stored with the
date. The energy yields are stored for the specified period.
Energy yield
Storage resolution/period
10-minutes values 31 days
Daily values 13 months
Monthly values 30 years
Annual values 30 years
Total yield Permanent

EN
© 2018 KOSTAL Solar Electric GmbH 15
5 Installation
5.1 Safety instructions for assembly and installation
DANGER
Voltage
Under solar radiation, the PV generators and cables may be energised.
There is the risk of death due electrocution and electric discharge.
►Disconnect the DC and AC connections from the power source prior to
any work on the inverter:
–Switch off all AC line circuit breakers and secure them against being
switched on again.
–Set the DC disconnector on the inverter to position '0' and secure it
against being switched on again.
–Disconnect the plug connectors of the DC cables (follow the instruc-
tions of the manufacturer).
–Disconnect AC plug from the inverter: press locking hook on the AC
plug slightly an remove AC plug.
►Only have specialists carry out any installation work.
►Only connect the cables to the inverter when it is requested by the instruc-
tions.
►Only connect SELV circuits to the RJ45 socket.
►Maintain access to the shut-down control free at all times.
►Only have trained qualified personnel carry out the installation and com-
missioning.
NOTE
Improper installation my cause performance reduction or damages on the in-
verter.
►Ensure that the installation site meets the following requirements:
–The mounting surface and immediate surrounding must be: perma-
nently fixed, vertical, level, of low flammability, and not subject to con-
stant vibration.
–The ambient conditions are within the permissible range (refer to Tech-
nical data).
–Open spaces are provided for around the device (above and under-
neath ≥ 200 mm, to the sides and in front ≥ 60 mm).
►Do not install the device in stables where animals are kept.
►Avoid exposure to direct sunlight of the device.
►Ensure that the display can be easily read on the installed device.

EN
16 © 2018 KOSTAL Solar Electric GmbH
Data transmitted via a public network are not protected from being accessed
by third parties.
Data transmission via a public network may cause additional costs.
►Obtain information on costs possibly involved prior to the use of a public
network.
►Use a public network at your own risk.
•Lay the cables such that the connection cannot come loose accidentally.
•Ensure that the fire safety measures of the building are not impaired when routing ca-
bles for the device.
•Make sure that no inflammable gases are present.
•Observe all applicable installation regulations and standards, national laws and connec-
tion values specified by the regional power supply company.
•Observe the connection ratings specified on the type plate.
•Do not connect the DC cables to ground potential.
The DC inputs and the AC output are nor galvanically isolated from each other.
5.2 Mounting the inverter
1. Fasten the mounting plate (4) to the mounting surface with 4 screws (3). The locking
plate (1) points upwards.
2. Place inverter on the mounting plate.
3. Hook the 4 locating pins on the back of the inverter into the retaining tabs (2) of the
mounting plate.
4. Press inverter against the mounting plate. The detent on the back of the inverter en-
gages audibly in the locking plate (1).

EN
© 2018 KOSTAL Solar Electric GmbH 17
5.3 Preparing AC connection
DANGER
Voltage
There is a risk of death by electrocution.
►Follow the safety instructions and warning notices in section 5.1.
►Never disconnect nor connect the plug connection while the AC connec-
tion is live.
►Install the circuit breaker prior to any work on the AC connection.
5.3.1 Residual current circuit breaker
If the local installation specifications prescribe the installation of an external residual
current circuit breaker, install a residual current circuit breaker. In accordance with
IEC 62109-1, a type A residual current circuit breaker is adequate.
5.3.2 AC cables
Suitable cables
•UL AWM Style 21098, size No. AWG 14
•UL AWM Style 2464, size No. AWG 16-22
Inverter
Cable cross section
AC cable
Power loss
(with 10 m cable
length)
Circuit breaker
PIKO MP plus 1.5-1 1.5 mm²10 W
B162.5 mm²6 W
4.0 mm²4 W
PIKO MP plus 2.0-1 1.5 mm²18 W
B162.5 mm²11 W
4.0 mm²6 W
PIKO MP plus 2.5-1 2.5 mm²16 W B16
4.0 mm²11 W
PIKO MP plus 3.0-1
PIKO MP plus 3.0-2
2.5 mm
²
25 W
B16 or B25
4.0 mm²15 W
PIKO MP plus 3.6-1
PIKO MP plus 3.6-2
2.5 mm²35 W B25
4.0 mm²23 W
PIKO MP plus 4.6-2 2.5 mm²56 W B25
4.0 mm²35 W

EN
18 © 2018 KOSTAL Solar Electric GmbH
5.3.3 Assembling the AC plug
NOTE
If the instructions of the plug manufacturer are not followed when connecting
the AC plug, the cable and the device may be damaged.
►Protect plug from bending loads.
►Do not use plug connector for interruption of current.
5.3.3.1 Preparing cables
Single connection
Double connection
Ø 6….14
Ø 13….18
PE N, L PE N, L PE N, L
Y 30 25 42 37 45 40
X 8
5.3.3.2 Fitting cable to AC plug
NOTE
Plug parts not assigned affect the IP rating of the degree of protection.
Always seal plugs not in use with protective caps.
220 V to 240 V grid voltage
Connect conductors N, L, and PE on the AC plug in 1-phase grid with 220 V to 240 V grid
voltage.
AC plug, inner part
AC plug, housing part
PE conductor
L conductor
N conductor

EN
© 2018 KOSTAL Solar Electric GmbH 19
100 V to 127 V grid voltage
DANGER
Voltage
There is a risk of death by electrocution when connecting the phases L1, L2,
or L3 to PE or N.
►Follow the safety instructions and warning notices in section 5.1.
The structure of 100 V to 127 V grid voltages differs from that of 220 V to 240 V grid volt-
ages as it is not a 1-phase but a 2 or 3-phase grid.
AC plug, housing part
PE connection
L1 connection (outer conductor)
L2 connection (outer conductor)
AC plug, inner part
Connection to 2-phase grid
1. Connect the N and L connection of the AC plug (5) between the L1 (3) and L2 (4)
outer conductors of the grid cable.
2. Connect PE cable (2) to PE connection on the AC plug.
Connection to 3-phase grid
In the 3-phase grid, there are 3 outer conductors in the cable:
1. Connect N and L connections of the AC plug between any 2 outer conductors
(between L1 and L2, or L1 and L3, or L2 and L3).
2. Connect PE cable to PE connection on the AC plug.
Voltage distribution in the 2 and 3-phase grid
The voltage in 2 and 3-phase grids is the same in every outer conductor: 100 V to 127 V.

EN
20 © 2018 KOSTAL Solar Electric GmbH
Assembly instruction for AC plug
1. Guide cable through the plug housing. Slide plug housing (1) onto the cable.
2. Introduce wire ends (2) into the plug. Ensure that the bending radius of the cables is
large enough (at least 4 times the cable diameter).
3. Using a screwdriver (3), secure wire ends with clamping screws. Ensure that the
clamping connection holds.
4. Slide plug housing onto the plug and tighten until a click sound is heard.
5.4 Preparing DC connection
DANGER
Voltage
There is a risk of death by electrocution.
►Follow the safety instructions and warning notices in section 5.1.
►Use the SUNCLIX plug connectors (DC plugs) included in the scope of de-
livery to ensure the specified degree of protection.
NOTE
If the DC plugs are not connected correctly to the DC cable, there is a risk of
short circuit. The inverter and modules may be damaged.
►Connect counterparts to the DC connections to the DC cable ensuring cor-
rect polarity.
NOTE
Soiled, displaced, or damaged seals impair the strain relief and the imperme-
ability.
►Do not soil, shift, nor damage the seals during DC plug assembly.