MAKING MODERN LIVING POSSIBLE
DLX
Installation Guide
DLX 2.0 - DLX 2.9 - DLX 3.8 - DLX 4.6
SOLAR INVERTERS
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 subsequent changes being necessary in specifications already
agreed.
All trademarks in this material are property of the respective companies. Danfoss
and the Danfoss logotype are registered trademarks of Danfoss A/S. All rights
reserved.
Copyright ©: Danfoss, 2012
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Installation Guide DLX series L00410622-01
Contents
1. Product Overview ....................................................................................................... 4
1.1. Symbols Used ............................................................................................................................................ 4
1.2. Product Label ............................................................................................................................................. 4
2. Installation .................................................................................................................. 8
2.1 Safety Equipment Required for Grid Connected Systems .......................................................... 8
2.2. Mechanical Installation .......................................................................................................................... 9
2.3. Checks Prior to Installation ................................................................................................................. 12
2.4. Electrical Installation ............................................................................................................................. 13
2.5. Required Safety Equipment................................................................................................................ 23
2.6. Checks before Start Up ......................................................................................................................... 24
3. Start Up ...................................................................................................................... 25
3.1. Initial Start ................................................................................................................................................. 25
3.2. Self Test for Italy ...................................................................................................................................... 36
4. Connection between Inverter and PC ..................................................................... 38
4.1. Without a Network ................................................................................................................................. 38
5. Internal Web Server .................................................................................................. 39
6. Troubleshooting ....................................................................................................... 40
6.1. Check List by Failure .............................................................................................................................. 40
6.2. Table of Events ........................................................................................................................................ 40
7. Maintenance and Disposal....................................................................................... 44
7.1. Regular System Inspection ................................................................................................................. 44
8. Warranty .................................................................................................................... 45
8.1. Warranty Disclaimer .............................................................................................................................. 45
8.1.1. Damage .................................................................................................................................................. 45
8.2. End of Life Disposal ............................................................................................................................... 45
9. Technical Data........................................................................................................... 47
Installation Guide DLX seriesL00410622-01
III
1. Product Overview
This Installation Guide contains all the necessary install information to connect and start up
the DLX inverter. The inverter must be used in compliance with the DLX User Guide, which is
to be found at www.Danfoss.com.
1.1. Symbols Used
The warning symbols used in this Installation Guide highlight important information on
how to avoid shock hazards to equipment and persons. Pay particular attention when
the symbols appear!
Table 1.1: Warning symbols appearing in this guide
Symbol
Description
DANGER: Situations where an immediate hazard could cause serious injury or
death to workers and/or the general public if not avoided.
WARNING: Situations where a potentially hazardous condition exists that could
result in the death or serious injury of workers and/or the general public if not
avoided.
CAUTION: Situations where a non-immediate or potential hazard presents a
lesser threat of injury that could result in minor or moderate injuries to workers
and/or the general public.
NOTICE: Situations where a non-immediate or potential hazard presents a risk
to damage of property and equipment. May be used to indicate important
operational characteristics. There is no Safety Alert or attention symbol present in
this situation.
1.2. Product Label
The product label contains important identification parameters and characteristics for the
inverter, and must be clearly visible after installation.
Figure 1.2.1: Product Label
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Installation Guide DLX series L00410622-01
Table 1.2: Symbols appearing on the product label
Symbol
Description
Discharge time: High voltages may be present inside the inverter for 1 hour after
switch OFF
Refer to User Guide: Look for further details in the User Guide, which is available
on the Danfoss website
Hot Surface: The heat sink on the back of the inverter can reach temperatures up
to 90 °C
Danger: High voltages are present
Disposal: Do not dispose in general waste! Collect the various parts separately
and recycle them according to local regulations
CE Marking: The product meets the EU safety, health and environmental
protection requirements
S – NO: Serial Number for inverter identification
1.3. Unpacking and Inspection
After unpacking the inverter safely, check that all components are present and in an
undamaged condition. If damaged, contact your supplier immediately!
1.3.1. Lifting and Carrying the Inverter
Considering the inverter’s weight of 20-22 kg, (depending upon model), lifting and
carrying the inverter must be correctly performed to prevent back injuries.
• When lifting, bend the knees, and keep
the back straight.
• Lift carefully; hold the inverter close to the
body and let the leg muscles do the work.
• Turn the whole body as one unit to avoid
twisting the lower back.
• Carry the inverter close to the body.
Figure 1.3.1: Correct lifting of the inverter
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1.3.2. Unpacking
• Place the box in position, with the top clearly visible and according to the arrow marking
on the packaging.
• Cut the seal, and open the box.
• Take out the lock clip, the bag with accessories and the Installation Guide lying on the
upper section of the foam packaging material.
• Remove the upper part of the foam packaging material.
• Both sides of the inverter case are narrowed in order to get a
better grip on the device. Lift up the inverter carefully out of
the box using the “handles” illustrated in Figure 1.3.2.
• Remove the lower section of the foam packaging and take
out the inverter mounting bracket.
• Store all the original packaging for possible later reuse.
Figure 1.3.2: “Handles”
After unpacking the inverter safely, check that all components are present and in an
undamaged condition.
1.3.3. Scope of Delivery
• DLX single phase inverter
• Mounting bracket
• Installation Guide
• Accessories: grounding strap, bracket screws, lock clip, extra type label
NOTICE
The mating parts of the connectors are not part of the standard scope of supply,
and must be provided by the system installer.
1.3.4. Inverter Structure
The housing of the DLX series inverter is designed for indoor and outdoor use (IP65), and
provides a degree of protection from dirt, rain, sleet, snow, dust, water, and corrosion.
H: 610 mm
W: 353 mm
D: 158 mm
Figure 1.3.3: Mechanical dimensions
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Installation Guide DLX series L00410622-01
The front surface of the inverter consists of an upper and a lower cover.
The upper cover may only be removed by Danfoss authorized personnel. Removal of the
upper cover by unauthorized persons voids the warranty!
The lower cover protects the connection area, and may be removed by the system
installer for electrical connection and maintenance of the inverter.
1. Upper cover
2. User Interface
3. Lower cover; customer connection area
4. AC output
5. DC input
6. Network input
Figure 1.3.4: Inverter structure
DANGER
Always disconnect the PV array cables from the inverter after turning the AC and
DC OFF, but before removing the covers, as the PV array can supply up to 600 VDC
to the inverter when exposed to sunlight.
• Loosen the four screws on the lower cover
with a 4 mm hex key, according to the
figure.
• Take the cover off carefully.
• Store the lower cover and screws safely to
avoid loss or damage.
• Fasten the screws on the lower cover with
a torque of 1.0 Nm.
Figure 1.3.5: Lower cover
CAUTION
Never remove the inverter lower cover in wet conditions! Removal of the inverter
lower cover during rain or in damp conditions can damage sensitive internal
electronic components.
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2. Installation
The DLX inverters contain no user-serviceable parts, and installation and maintenance
must be performed by qualified persons, who have a qualified knowledge of the local
and national electrical regulations and who follow the instructions in this Installation Guide.
NOTICE
The DLX series is a grid interactive (grid-tie) inverter and must be used exclusively
for its designed purpose, which is to convert PV-generated DC electricity into AC
electricity to feed into the grid.
NOTICE
The DLX series require minimum 7W PV power and a DC voltage above 230V for
commissioning. An installation cannot be finished without 7W PV power. A small
DC power supply can be used.
• The inverter must be operated in its original and technically intact condition without any
unauthorized modifications.
• Always keep the values of operation within the limits given in the technical
specifications, due to the risk of possible inverter damage.
WARNING
The safety precautions and instructions in this Installation Guide must be read
thoroughly to be able to install and operate the inverter properly to prevent death,
injury or material damage.
2.1 Safety Equipment Required for Grid Connected
Systems
Ensure compliance with the local and national electrical regulations to satisfy the safety
equipment requirements.
NOTICE
The system installer is responsible for providing safety equipment that meets the
requirements for both the DC and AC operations, and to protect the equipment
and prevent personal injury, as per the local and national electrical regulations.
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Installation Guide DLX series L00410622-01
2.1.1. Disconnection Devices
Disconnection devices, switches or circuit breakers, enable a shut-off from the power
source during operation. They protect the current-carrying conductors and other system
components from power surges and system malfunctions, and help to shut down the
inverter safely for maintenance and repairs.
• Both AC circuit breaker(s) and DC switch(es) are recommended to facilitate maintenance
work and repairs of the inverter.
• The disconnect devices must conform to the local and national electrical regulations, and
have an interrupt rating sufficient for the voltage and current available in the circuit.
• Each disconnection device must be readily accessible and operable without exposing the
operator to live parts. All devices must be permanently marked for their purpose.
2.1.2. Overcurrent Protection Devices
Overcurrent protection devices, fuses or circuit breakers, prevent the circuit conductors
from overheating as a result of overload, short circuit or ground fault.
• An overcurrent protection device is required on every current carrying conductor.
• If a fuse blows or a circuit breaker trips the cause should always be determined before
replacing or resetting them.
• It is recommended to install an RCD (Residual Current Device) of type A between the AC
grid and the inverter, to be able to detect leakage current and interrupt fault paths. The
needed detection range must comply with the relevant local and national electrical
regulations!
2.2. Mechanical Installation
The mounting surface and the mounting method must be suitable for the inverter’s
weight, dimensions and possible housing temperature. This is crucial to maintaining the
efficiency of the inverter!
WARNING
Correct installation prevents the inverter from falling from the wall! The mounting
surface must be suitable for the weight 20-22 kg and temperature (90 °C) of the
inverter.
CAUTION
Protect the inverter from flammable and explosive environments, as the inverter
heat sink can reach temperatures up to 90 °C during long-periods of high
performance.
• The inverter is suitable for outdoor operation, but should be sheltered from direct
sunlight, snow, rain, dust and sand.
• Location should be in proximity to the PV arrays to minimize DC losses.
Installation Guide DLX seriesL00410622-01
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Avoid enclosed areas with poor air flow! Sufficient ventilation is needed to prevent
temperature build up inside the inverter and hence possible power losses. Observe the
minimum distances specified below to maintain optimal cooling:
1. 400 mm
2. 300 mm
3. 150 mm
4. 150 mm
Figure 2.2.1: Minimum distances for optimum cooling
For optimal operating conditions, the ambient temperature must be between
-25° C & +65° C, and non-condensing relative humidity between 4 % and 99 %.
NOTICE
Direct sunlight may cause yield losses, as direct sunlight causes increased internal
temperatures that can lead to reduced power output. Also, direct sunlight may
cause degradation of the LCD screen quality.
CAUTION
Ensure a location where people cannot accidentally come in contact with the rear
inverter surface, due to temperatures up to 90°C.
2.2.1. Wall Bracket
Depending on the mounting surface, different mounting methods may be required to
secure the wall bracket.
• The system installer is responsible for selecting the correct type and number of fixings
suitable to support the weight on the mounting surface.
• The bracket is designed to withstand 80 kg
• The inverter must be mounted in a vertical orientation.
• Keep the lower cover closed when mounting the inverter to avoid damage to internal
components.
• Mark the bracket holes on the mounting surface using a spirit level and the bracket as a
template to ensure the inverter is level.
• Fasten the bracket to the mounting surface with the required number of fixings to
support the hanging weight of the inverter.
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Installation Guide DLX series L00410622-01
Figure 2.2.2: Inverter bracket
Figure 2.2.3: Distances between fixing screws
1. Carrier slots for the inverter
2. Steering slots for the inverter
3. Carrier slots for the Stringbox
4. Fixing clip
D1. 232.5 mm
D2. 232.5 mm
D3. 75 mm
D4. 75 mm
2.2.2. Inverter
Attach the inverter to the mounting bracket as follows:
• Locate the hooks for the carrier
slots on the upper back and the
hooks for the steering slots on the
lower back of the inverter.
• Use the locating pins on the
Stringbox.
Figure 2.2.4: Hooks on the back of the inverter
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• Lift the inverter up and guide the
upper hooks into the slots on the
bracket.
• Control the lower hooks into the
slots and slide the inverter onto
the bracket.
Figure 2.2.5: Mounting Inverter onto bracket
• Ensure that the inverter is
correctly mounted, and tighten
the lock clip with one screw into
the inverter and one into the
Stringbox.
• Apply a torque of 1.0 Nm
2.3. Checks Prior to Installation
 Make sure that the AC circuit breaker(s) and the DC switch(es) are OFF and that the
terminals are in a discharged state to prevent shock hazards.
DANGER
Contact with energized ports may cause lethal injuries! All installation of the
inverter must be performed with circuits de-energized!
 All electrical installations shall comply with the local and national electrical regulations
in force at the installation site.
 Check that the PV and the grid characteristics are compatible with the inverter
characteristics. Refer to 9. Technical Data
 Check that the inverter is properly fastened and secured to the bracket.
 Ensure that the conductors and circuit breakers/fuses are properly sized to comply with
the national electrical regulations.
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Installation Guide DLX series L00410622-01
 Ensure that the conductors are listed for PV applications and the site environment, and
that they have the correct color coding.
2.4. Electrical Installation
Contact the local utility company for interconnection agreements and power approval
before connecting to the grid.
Correct electrical connection is critical for achieving a safe, long-term and reliable
operation of the entire PV system.
NOTICE
Only persons who are qualified to install high voltage electrical equipment and are
familiar with the electrical regulations applicable to the installation site may install
the inverter. This is to ensure a safe connection and avoid electrocution!
DANGER
Never work with live wires! All work on the inverter must be performed with
disconnected terminals, as contact with live wires may cause serious injury or
death!
2.4.1. Connection Area
The DC connections are achieved by the use of a Stringbox with DC switch and three sets
of DC connectors. The connection of the AC and the network cables are with screw
terminals and a RJ45 connector.
1. CAN bus terminal
2. RS-485 terminal
3 Ethernet port
4. Internal DC terminal blocks, +POS
and -NEG
5. Internal DC ground receptacle,
GND/PE
6. Stringbox equipped with DC switch
7. Internal AC terminal block
Figure 2.4.1: Stringbox with DC switch
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2.4.2. Grounding
Appropriate grounding of the entire PV system limits voltage surges, gives a common
reference point for the conductive parts and facilitates the operation of the overcurrent
devices.
NOTICE
• Grounding must be carried out by qualified persons only and comply with local
and national electrical regulations.
• Follow the safety instructions and specifications from the different PV module
manufacturers regarding grounding requirements.
• The PV strings may be ungrounded, or grounded through either the negative or the
positive string conductors.
• The grounded DC conductors are connected to ground via the grounding strap.
• The grounded conductors must be sized according to the local and national electrical
regulations, and only carry current when electrical malfunctions occur.
• All metal parts of the DLX inverters are electrically bonded to ground through the
terminal labeled GND in the AC terminal block.
CAUTION
If the positive or negative PV conductors are grounded, then the grounding strap
must be connected to the DC ground terminal and the system must NOT be
grounded at any other point, as voltage potentials can appear and possibly
damage electrical components.
A minimum cross section area of 6.0 mm² / 10 AWG is required for the ground wire
connection.
2.4.3. DC Connections (PV)
The DC connections include wiring from the PV modules, through the combiner box, to
the inverter.
DANGER
Always disconnect the PV array before starting the connection on the DC side!
Charged DC terminals pose a risk of serious injury or death as the PV array can
supply up to 600 VDC to the inverter when exposed to sunlight.
WARNING
Never remove cables during operation! The inverter is charged with high voltages,
and removal of cables during operation may cause arcing
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Installation Guide DLX series L00410622-01
NOTICE
Maximum Voltage: The open circuit voltage, VOC, must never exceed 600 VDC
under any conditions. The voltage generated by PV modules is inversely
proportional to the temperature; at lower temperatures the PV voltage increases
from the nameplate rating and at higher temperatures the PV voltage decreases
from the nameplate rating.
NOTICE
Ensure the DC switch in the Stringbox is in the OFF position, when removing the
lower cover to access the connection terminals.
0 = OFF
I = ON
Figure 2.4.4: DC switch
2.4.3.1. Stringbox with DC switch
The Stringbox is equipped with DC switch and plug-in connectors.
P1, P2, P3:
Positive connectors
N1, N2, N3:
Negative connectors
Figure 2.4.5: Optional DC connectors and DC switch
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P1, P2, P3:
Ungrounded terminals
N1, N2, N3:
Grounded terminals
N4: Grounded terminal
N5: Terminal for the grounding strap
P4: Ungrounded terminal
DS: DC Switch
Figure 2.4.6: Stringbox with DC switch
Negative Grounded PV String
• The inverter is delivered from the factory
in an ungrounded PV string
configuration as standard.
• Connect the grounding strap between
N5 in the Stringbox (fig. 2.4.6) and the DC
ground receptacle labelled GND/PE in the
inverter lower compartment.
Figure 2.4.7: Negative grounded PV string
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Installation Guide DLX series L00410622-01
Positive Grounded PV String
• Connect the positive connectors (+) to
the terminals labelled 2.Grounded and
the negative connectors (-) to the
terminals labelled 1.Ungrounded.
• Switch the conductors connected to N4
and P4 (fig. 2.4.6).
• Connect the grounding strap between
N5 in the Stringbox (fig. 2.4.6) and the DC
ground receptacle labelled GND/PE in the
inverter lower compartment.
Figure 2.4.8: Positive grounded PV string
2.4.3.2. Connection Procedures
• The DC conductors connecting the PV array to the inverter must each have a minimum
rating of 600VDC at all given operating temperatures.
• The DC conductor cables must be sized for correct temperature rating and sunlight
resistance. Use copper wire with a cross-section area of between 6 mm2 to16 mm2 / 10
AWG to 6 AWG and temperature rating 90° C for all connections. Ensure compliance with
the relevant national electrical regulations!
• Conductor insulation rating must be higher where the backs of the modules cannot
receive cooling or where the ambient temperature exceeds 40° C. Note the relevant
national electrical regulations!
String Connectors
• The corresponding mating connectors must be provided by the system installer.
• Follow the guidelines from the connector manufacturer when choosing cable sizes and
assembling them in the connectors.
• Plug in the connectors and hand-tighten them to the corresponding connector on the
inverter.
• Check if the contacts are firmly tightened by pulling them gently.
• Only valid for France: Removal of the connectors requires a special tool. Note the
relevant national electrical regulations!
2.4.3.3. Reversed DC Connection
If the positive and negative conductors are connected to the wrong terminals, the inverter
will not start up. The inverter is not damaged due to internal reverse blocking diodes, but
high currents are generated in the conductors.
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DANGER
Be aware of high currents! If the DC terminals are mixed up during connection,
high currents are generated in the conductors, which can pose shock hazards.
Procedure
• Turn OFF the DC switch(es) and the AC circuit breaker(s).
DANGER
The PV conductors are still charged after the DC switch in the Stringbox is turned
OFF, due to power fed from the PV modules. Always turn OFF the remote DC
switch and wait until the PV modules do not feed power.
• Remove the PV connectors.
• Check with a voltmeter if the terminals are discharged.
• Disconnect the conductors from the terminal block.
• Connect the conductors to the correct terminal block.
• Test the polarity using a voltmeter before turning ON the DC switch(es) and the AC
circuit breaker(s).
2.4.3.4. Jumper Position for the System Grounding Setup
The jumper above the - NEG terminal in the customer connection area monitors the
arrangement of the DC connection according to the grounding setup. When delivered, the
jumper is positioned for an ungrounded string. Depending on the requirements from the
module manufacturer, the jumper must be pulled up and positioned correctly to match
the grounding of the DC conductors.
In case of discrepancy the following message will appear in the display: “Fuse fault.”
Table 2.4.1: Jumper position for the grounding setup
Connection Area
Top view
System
Ungrounded PV String Configuration:
There is no connection between the pins.
Positive grounded PV String
Configuration: The jumper short-circuits the
two leftmost pins.
Negative grounded PV String
Configuration: The jumper short-circuits the
two rightmost pins.
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Installation Guide DLX series L00410622-01
2.4.4. AC Connections (Grid)
The AC connection includes wiring from the AC distribution panel through one or more
circuit breakers to the AC terminal block of the inverter.
Verify that the AC grid specifications are compatible with the inverter characteristics
before connecting the inverter to the grid:
• Single phase / Split phase
• Voltage range (184 – 276 VAC)
• Frequency range (50 Hz ±5 Hz)
DANGER
Turn OFF the AC circuit breaker before connecting the inverter to the AC grid to
prevent electrocution.
The DLX series are single phase output inverters, which are designed so that they can be
connected to a three-phase system. When several inverters are connected together, they
must be distributed evenly between the grid phases.
Single Phase
Three Phase
Figure 2.4.9: Example inverter AC connections
Table 2.4.2: The different AC conductors
Term (Abbr.)
Description
Phase conductor (L1/L2/L3)
Neutral conductor (N)
The ungrounded live conductors, which carry current to the load.
In a single phase system the neutral conductor is a circuit conductor
carrying the same amount of current as the ungrounded phase
conductors.
An electrical path to ground, designed to carry fault currents.
PE (Protective Earth /
Ground) conductor
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2.4.4.1. Connection Procedures
Figure 2.4.10: Connection area with AC terminals
1. AC terminal block:
• GND: Ground terminal
• N: Neutral terminal (TN/TT) or Phase terminal (IT)
• L: Phase terminal
2. Cable gland
• Use copper wire with a maximum cross-section area of 16 mm2 / 6 AWG. Ensure
compliance with the relevant national electrical regulations!
• The AC conductor resistance should be minimized.
• Unscrew the cable gland locknut.
• Guide the AC cable through the opening, and connect the conductors to the
corresponding terminals in the connection area:
• Phase conductor (L1 or L2 or L3) to L
• Neutral conductor (TN/TT) or Phase conductor (IT) to N
• Grounded conductor to GND
• Tightening torque of the terminal screws is 1.5 Nm
• Double check if the connection is correctly carried out.
• Hand-tighten the gland locknuts to seal the cable gland.
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Installation Guide DLX series L00410622-01
2.4.5. Network Connections
The inverter is equipped with three communication interfaces: Ethernet, CAN, and RS-485.
Ethernet provides communication between the integrated web server and a computer,
either directly or via a router/switch. CAN allows communication between several DLX
inverters. RS-485 allows communication with Danfoss compatible third party products or
to Danfoss CLX products.
1. Follower inverter
2. Master inverter
3. CAN bus cable
4. Ethernet cable
5. RS-485 cable
6. Computer
7. Data logger
Figure 2.4.11:Connection without network
2.4.5.1. Connection Procedures
Figure 2.4.12: Connection area with network terminals
1. CAN bus terminal
2. RS-485 terminal
3. Ethernet connector
4. Network cable gland
NOTICE
If multiple inverters are connected together, all inverters must be connected to the
CAN bus before Start Up to benefit from single installation setup.
Installation Guide DLX seriesL00410622-01
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• Ethernet: Use CAT5e or better, with size 0.21 mm2 /24 AWG, with a maximum total
length of 100 m.
• CAN: Use CAT5e or better, with size 0.21 mm2 /24 AWG, with a maximum total length of
500 m.
• RS-485: Use CAT5e or better, with size 0.21 mm2 /24 AWG, with a maximum total length
of 1200 m
• Unscrew the network cable gland, and take out the grommet.
• Three-way cable gland insert:
Figure 2.4.13: Insertion of the network cables in the cable gland
1. Conductors with connector: cut through the grommet with a width of about 1mm. With
no connector: no cutting is necessary
2. Remove the plug from inside the grommet.
3. Assemble the cable in the gap. Repeat step 1 – 3 if more cables.
4. Guide the assembly into the cable gland.
5. Connect the cables to the terminals in the connection area as follows:
- Ethernet:
- CAN:
- RS-485:
Plug the Ethernet cable directly into the RJ45 socket.
The conductors must be connected to the same labeled
terminals at both ends, i.e. H connected to H, L to L etc.
Recommended tightening torque is 0.2 Nm / 0.15ft-lbf.
The conductors must be connected to the same labeled
terminals at both ends, i.e. A connected to A, B to B etc.
Recommended tightening torque is 0.2 Nm / 0.15ft-lbf.
6. Tighten the cable gland firmly.
NOTICE
Cable shielding: It is recommended to mount the cable shielding for both the
CAN and RS-485 with the GND at the receivers end.
If any kind of datalogger is connected to an inverter, then only mount the shield at
the datalogger.
If the system consists of two or more inverters, then only mount the shield at the
“Master”
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Installation Guide DLX series L00410622-01
CAN and RS-485 connection pinout
CAN
B(+)
A(-)
GND
B(+)
A(-)
GND
H
L
COMGND
H
L
COMGND
RS-485
2.4.5.2. Jumper Position for Termination Resistance
With multiple inverters connected the jumper located behind the CAN / RS-485 terminal
activates the termination resistance when the pins are terminated (short-circuited). This
minimizes signal reflections in the cables and helps to avoids interference.
• Single inverter: The two pins must be terminated (Default).
• Several inverters connected: The master-follower configuration requires terminated
pins on the first inverter and on the last inverter in the linked series. The pins must be
disconnected on the inverters between the first and last inverters in the linked series.
• To disconnect the pins, the jumper must be pulled up and placed only on one of the
pins.
• Be careful not to bend the pins when removing or installing the jumper!
Table 2.4.3: Jumper for multiple inverters in linked series
Network connection
Jumper Position
Pins
The pins are terminated.
The pins are disconnected.
1. CAN termination resistance
2. RS-485 termination resistance
2.5. Required Safety Equipment
Safety equipment includes switches or circuit breakers to disconnect power sources,
fuses or circuit breakers to protect conductors from overheating and surge protection
to protect the equipment from voltage bursts and surges.
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NOTICE
Safety Equipment: The system installer is responsible for providing safety
equipment that meets the requirements for both the DC and AC operations to
protect the equipment and prevent personal injury.
2.6. Checks before Start Up
 Mounting:









- Check that the bracket and the inverter are correctly mounted and secured.
PV wiring:
- Check that the PV cables are rated for the PV current and for the present
environmental conditions.
- Check that the wiring is performed according to local and national electrical
regulations.
Connection:
- Check that the PV conductors are correctly torqued to the DC terminals.
- Check that all connectors and cable glands are correctly tightened and sealed.
DC side:
- Verify that the PV open-circuit voltage (VOC) does not exceed 600 VDC
- Check that the DC polarity is correct.
AC side:
- Verify that the AC conductors are correctly connected to the AC terminals.
Grounded conductors:
- Check that the grounded conductors are properly sized, and not fused or switched.
Jumpers:
- Check that the jumpers for the grounding setup and for the termination resistance
are correctly positioned according to the grounding setup.
Disconnects:
- Ensure that all current-carrying conductors on both the DC and AC sides have a
switch, and that the switch is located correctly and is readily accessible.
Overcurrent protection:
- Ensure that the overcurrent protection on both the DC and the AC sides are rated
correctly, and capable of being changed without touching live contacts.
Inverter cover:
- Ensure that no cables interfere with the sealing of the inverter lower cover, and fasten
the cover firmly to the housing. Recommended tightening torque is 1.0 Nm
CAUTION
Verify that the lower cover is correctly tightened, so that no moisture enters the
housing and damages the electronic components.
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Installation Guide DLX series L00410622-01
3. Start Up
A minimum available voltage of 184 VAC, 230 VDC and a power greater than 7 WDC is
required before the inverter starts feeding power to the grid.
AC side
•
Turn ON the AC circuit breaker(s).
DC side
•
Turn ON the DC switch(es).
3.1. Initial Start
When the inverter is started for the first time, an installation menu is automatically
displayed to enable the configuration of certain critical values and operational settings.
3.1.1. Customizing the Inverter Settings
Single Inverter
• When both the DC and the AC switches are turned ON and the inverter is supplied with
enough power, an installation menu is displayed in the LCD screen.
Multiple Connected Inverters
1. CAN
• Connecting all inverters via the CAN bus enables the configuration of all inverters in a
plant via one inverter. The Start Up can then be carried out on any inverter, and if
configured as the master inverter the configuration settings of time, date, language and
grid settings will be transferred to all the other follower inverters on the network.
• Each follower inverter is automatically assigned an ID number from the master during
Start Up.
2. RS-485
• Connecting the inverters via the RS-485 bus enables communication with third party
equipment.
• Each inverter must manually be assigned an ID, a bit rate number and a parity number:
- The ID number must be between 1 and 247.
- Both the master inverter and the follower inverters need a bitrate number and a
parity number. Compare with the setup in the third party equipment (eg. an
external data logger) and write this number in the inverter’s network menu. Refer
to section 6.2.4.2 Network Setup of the User Guide for more details.
Defaults are: bitrate – 19200 and parity – none.
Installation Guide DLX seriesL00410622-01
25
3.1.2. User Interface
The User Interface on the front of the inverter contains a LCD screen, three LEDs and six
function keys.
Figure 3.1.1: Inverter user interface
• To activate the display when the screen saver is active (blank), press any key.
• With sufficient AC power the display shows the Start Up screen.
3.1.2.1. Function keys
The function keys have the following uses:
Table 3.1: Function keys
Symbol
Function
Symbol
Function
Up: Scroll up / increase value
Right: Navigate one page or value
right
Down: Scroll down / decrease value
Enter: Select option / go to next level
Left: Navigate one page or value left
Cancel: Stop operation / back to
previous menu item
• The selected item is always highlighted in yellow.
• A registered touch of a button causes a “click” sound to be heard.
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Installation Guide DLX series L00410622-01
3.1.2.2. LED
There are three LEDs next to the display screen. The upper one is red, the middle is yellow
and the lower one is green.
Table 3.2: LEDs.
Symbol
NONE
LED
Function
Action
Red
Malfunction! Inverter in shutdown
mode
Look for alarms in
Active Alarms
Green
&
Yellow
Caution! Inverter still operates, but at
a limited level
Look for warnings in
Active Alarms
Green
Operates; inverter feeds power to the
grid
No action
Yellow
Inverter is OFF (Power < 7WDC)
No action
3.1.2.3. LCD Screen
To navigate in the LCD screen the six function keys must be used. By selecting one of the
seven items in the Main Menu, a further navigation through different submenus is possible.
There are four different menu levels.
Home, Status, Event Log, Statistics:
The information and values are read-only.
Setup, Commands, Alarm Setup:
The information and values can be modified.
Figure 6.2.1: Main Menu
Padlock: Opens up when correct password is entered.
Lines: Number of highlighted lines indicates the current menu/submenu level,
with the top line being the first level (Main Menu).
Installation Guide DLX seriesL00410622-01
27
3.1.3. Start Installation configuration
1. Start
Left – Cancel
Right – OK
Enter – Confirm
2. Language Selection
Default – English
Enter – Call up the list of languages
Up or Down – Navigate through the list to find
the preferred language; English, German, French,
Spanish, Italian, etc..
Enter – Confirm
Right – Next
Enter – Confirm
3. Date
DD.MM.YYYY
Enter – Call up the date
Up – Increase present digit
Down – Decrease present digit
Right – Select next digit
Left – Select previous digit
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
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Installation Guide DLX series L00410622-01
4. Time
HH.MM (24 H)
Enter – Call up the time
Up – Increase present digit
Down – Decrease present digit
Right – Select next digit
Left – Select previous digit
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
NOTICE
The time setting must match the time on the actual installation site, otherwise
data may be overwritten!
5. Set Bus ID
Enter – Call up the digits
Up – Increase present digit
Down – Decrease present digit
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
If RS485 communication is used, set a unique bus ID for the inverter. For any follower
inverters, this will be required to be set manually under Setup > Network Setup > Bus ID
(RS485). If RS485 communication is not used, this step can be missed.
6. Set as Master Unit
Default – No
Enter – Call up the options: Yes or No
Up – Yes
Down – No
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
Installation Guide DLX seriesL00410622-01
29
If the inverter is set to master, data must be collected from the follower inverters. The
following screen is displayed:
7. Grid Configuration
Enter – Call up the list of grid configurations
Up or Down – Select the grid configuration of
the actual installation site:
TN/TT, IT, Undefined
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
8. Feeding Phase
Enter – Call up the list of phases
Up or Down – Select the preferred phase:
- TN/TT: Not set, L1, L2, L3
- IT: Not set, L1-L2, L1-L3, L2-L3
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
If the inverter is set to master, and there is more than one inverter in the plant, the
following screen is displayed:
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Installation Guide DLX series L00410622-01
If the inverter is configured as master: step through and set phase values (L1, L2, L3, L1-L2,
L1-L3, L2-L3) for all follower inverters.
9. Plant Apparent Power
Plant apparent power is used to determining some VDE 4105 default settings. The value
shown in the installation menu is a suggestion and must be confirmed. Please call up the
digits and change value if required before pressing Enter.
Enter – Call up the digits
Up – Increase present digit
Down – Decrease present digit
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
10. Grid Code
Enter – Call up the list of grid codes
Up or Down – Scroll through the list to select
the required grid code for the actual installation
site:
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
Installation Guide DLX seriesL00410622-01
31
CAUTION
The selected grid code must match the actual installation site; otherwise the
inverter may not operate or be compliant to relevant local and national
regulations due to incorrect limit values.
NOTICE
• UK: Follow the local electrical regulations when selecting the grid code; either
normal grid code setting or UK 16A Limit restricted grid code setting with a 16A
limitation for G83 compliance.
• Germany: Follow the local electrical regulations when selecting the grid code
setting; either Germany 126 (VDE 0126-1-1) or Germany 4105 (VDE-AR-N 4105).
The following screen is displayed while the settings are updated:
Grid Code Selection
NOTICE
An installation timer ensures that the grid settings can be changed (using the
Owner password) within 5 hours of feeding power to the grid. Thereafter it is only
accessible using the Installer password, which may only be obtained for installers
and grid operators by contacting Danfoss.
11. Reactive Power Setting
Enter – Call up the options
Select the actual reactive power setting:
1. For installations <= 13.8 kVA:
VDE 4105 0 – 13.8
2. For installations > 13.8 kVA:
VDE 4105 13.8 –
Enter – Confirm
Left – Back
Right – Next
Enter – Confirm
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Installation Guide DLX series L00410622-01
12. Screen Timeout
Enter – Call up the digits
Default – Screen backlight OFF after 60 sec
Left – Back
Right – Next
Enter – Confirm
NOTICE
The smallest value to be set is 30 sec, and the highest is 99 sec.
Setting the value to 0 disables the screen timeout and leaves the screen backlight
ON at all times.
13. Customer Name
Enter – Call up the keyboard
The keyboard enables the typing of a customer
name.
Left – Back
Right – Next
Enter – Confirm
In some of the submenus the settings must be typed by using the function keys:
Letter keyboard
Installation Guide DLX seriesL00410622-01
Number keyboard
33
Table 5.2: Symbols appearing in the type screens
Symbol
Description
Symbol
Description
Upper- or lower-case letter
Confirm changes and exit the menu
Point
Clear the typing field
Space
Go back without saving changes
Cancel last letter
Go to the Letter keyboard
Go to the Number keyboard
• Enter must be pressed until the wanted letter/number/symbol is shown.
• It is possible to navigate between the characters by using the Up arrow to set the marker
into the text window, then using Left and Right to navigate between the characters.
• There is space for a maximum of 19 characters in the text window.
14. Site
Enter – Call up the keyboard
The keyboard enables the typing of a site name.
Left – Back
Right – Next
Enter – Confirm
15. Unit Name
Enter – Call up the keyboard
The unit name helps to distinguish and identify
specific inverters in a large PV plant.
Left – Back
Right – Next
Enter – Confirm
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Installation Guide DLX series L00410622-01
16. Message
Enter – Call up the keyboard
This message field is to help distinguish and
identify specific inverters in a larger PV plant, or
for any other information.
Left – Back
Right – Next
Enter – Confirm
17. Owner Password
Enter – Call up the digits
Default: 0003.
Change the password to 4 optional digits
Left – Back
Right – Finish
Enter – Confirm
NOTICE
With several inverters connected it must be checked that the installation is carried
out on all the follower inverters.
• Look at the displayed menu and the LEDs: It is not carried out correctly if the
installation menu is still displayed and/or the green LED is not lit and the
yellow and red LEDs are lit.
• Check that the connection of the CAN cables are correct, that the AC and DC
switches are ON and that the voltage are >184 VAC, and >230 VDC and there is
greater than 7 WDC of power
• If the Start Up phase is correctly carried out the inverters are ready to use. They
are fully automatic during normal operation, and no manual control is
necessary for feeding power into the grid.
A warning box is displayed if an error occurred during installation:
Installation Guide DLX seriesL00410622-01
35
Warning Box
Errors:
1. No communication
2. Wrong grid settings
• Check the LEDs on the inverters. If the yellow and red are lit check that the installation is
correct performed and that the grid settings are correctly set.
• If the ‘Start Installation’ screen is still shown, run through the installation process on the
inverter.
3.2. Self Test for Italy
The Self Test function is only valid for installation in Italy. It tests the inverters’ grid
monitoring function of voltage and frequency, and takes approximately 2 minutes.
NOTICE
The Self-Test can only be activated when:
• The installation procedure is executed.
• The country setting is set to Italy.
• The inverter is in Running/Derating Mode.
Select: Commands>Inverter Commands>Self Test
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Installation Guide DLX series L00410622-01
•
•
•
•
The inverter carries out four test sequences, all of which are displayed on the screen.
After the test is finalized, each test result must be confirmed by entering Next.
After entering Finish on the last result, the screen displays the Inverter Commands menu.
The test results can be found in Commands>Inverter Commands>Results Self Test.
Refer to User Guide for more detailed information about the Italian Self Test
Installation Guide DLX seriesL00410622-01
37
4. Connection between Inverter and PC
The site performance can be checked remotely by using a computer. The connection can
be achieved between the inverter and the computer either directly or via a network.
4.1. Without a Network
To connect the inverter and the computer directly a regular Ethernet cable is needed. If the
network card in the computer does not support Autosense, a crossover cable is needed to
create a connection to the inverter.
1. Follower inverter
2. Master inverter
3. CAN bus cable
4. Ethernet cable
5. RS-485 cable
6. Computer
7. Data logger
Figure 4.1.1:Connection without network
NOTICE
With several inverters connected together via CAN bus the Ethernet cable must be
attached to the master inverter only.
4.1.1. IP Address
The computer’s and the inverter’s IP address must be in the same range. If the inverter’s IP
address is 192.168.10.X, the computer’s IP address must be 192.168.10.Y, where X and Y are
different numbers between 1 and 254.
Inverter
The inverter’s default IP address is 192.168.10.20. To change the IP address, go to
Setup>Network Setup and set the inverter’s IP address as required.
To connect the PC and the inverter, the inverter’s IP address must be entered into the PC
web browser address line.
Refer to User Guide for more detailed information about Network setup
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Installation Guide DLX series L00410622-01
5. Internal Web Server
The inverter has an internal, onboard web Server providing detailed information about the
operation, warning/alarms and energy production from the inverter/plant.
• The web page is best viewed in Firefox 6.0 and Internet Explorer 8.0 or later versions.
• From the web page certain inverter settings can be changed after applying the correct
user name and password.
• Type the inverter’s IP address in the computer’s web browser.
• Default administrator account is: User: admin, Password: admin.
This can be changed by user, and should be changed if the web server is connected to
the internet.
5.1. Home
The Home screen is the standard display, which is always shown when opening the web
server.
Figure5.1: Web Server Home screen
Installation Guide DLX seriesL00410622-01
39
6. Troubleshooting
This chapter contains useful information if the inverter malfunctions during start-up or
operation. Start by checking that the installation is carried out correctly, and then check
the information in section 4.2 for possible solutions. If this does not help solve the
problem, please contact the system installer.
6.1. Check List by Failure
If the inverter does not feed power to the grid, try to solve the problem by checking:






That the irradiation is sufficient to generate power (>7 W).
That both the AC circuit breaker(s) and DC switch(es) are ON.
That the operation mode of the LEDs is normal. Refer to 3.1.2.2. LED.
That there are no warnings or alarms in the display.
That all connection points in the system are properly tightened.
That the values of the PV voltage, current and power match those in the display.
If all these items are OK, and there is still no power fed to the grid, please contact the
system installer.
6.2. Table of Events
The inverter automatically identifies operational issues and displays the messages on the
screen. Detailed information about warnings and alarms can be found in the Event Log
menu.
Messages that can appear in the display:
W = Warning: inverter continues to operate at highest possible capacity (Yellow LED
A = Alarm (Red LED)
The Display Message code number (E01, E02, etc..) is the code shown in the event
description as displayed in the Event Log of the webserver view:
Table 7.1: Description of messages appearing in the display during inverter failure
Display Message
Panel fault (W/A – E01)
Input circuit breaker open (A
– E02)
Description
PV module failure
DC switch(es) is open
Inverter failure (W/A – E03)
Output circuit breaker open
(A – E04)
Inverter failure
AC circuit breaker(s) is open
40
Action
- Contact the module supplier*
- Turn ON the DC switch(es)*
- If already ON, contact the system
installer
*
- Turn ON the AC circuit breaker(s)*
- If already ON, contact the system
installer
Installation Guide DLX series L00410622-01
Display Message
Grid fault (W/A – E05)
Description
No detection of the grid,
not able to synchronize
with the grid or fault within
the country-settings
GUI fault (W/A – E06)
Display is not responding
High voltage on input side (A
– E07)
Low voltage on input side (A
– E08)
DC voltage threshold of 600
VDC is exceeded
DC voltage is too low to
operate the inverter
Low PV isolation resistance
(W – E09)
PV isolation resistance is
below permitted level
Failure on DC side (W/A –
E10)
Inverter failure on the DC
side
Failure on AC side (W/A –
E11)
Inverter failure on the AC
side
High inverter temperature
(W/A – E12)
Maximum permissible
internal inverter
temperature is exceeded
Low inverter temperature
(W/A – E13)
Low internal inverter
temperature
Installation Guide DLX seriesL00410622-01
Action
- Verify if the AC circuit breaker is ON
and operational
- Measure that the grid voltage is
present at the AC terminals
- Check that the DC switch(es) is ON
and that the DC power is > 7W
- Check that the country settings have
been successfully set in Setup>Grid
Setup
- If country is set to Italy, has the SelfTest failed. Run test again
- Turn off the AC side. Wait for 3
seconds and then turn on again. Wait
30 seconds for the GUI to turn on
- If still fault, contact your distributor
- Contact system installer
- Fault is cleared automatically when
PV voltage exceeds 230 V
- If the inverter remains in this fault
during daylight, and the VDC is >230V,
contact your distributor
- The grounding setup is configured
incorrect
- Check the jumper for the grounding
setup (Jumper Position for the System
Grounding Setup )
- If the jumper is correct positioned,
contact the supplier
- Failure on the DC side. Other W/A
will be displayed
- If the inverter is in Shutdown, turn off
the AC side and then the DC side.
Wait for 30 seconds, then turn on the
AC side and then the DC side
- If the fault persists, contact your
distributor
- Failure on the AC side. Other W/A
will be displayed
- If the inverter is in Shutdown, turn off
the AC side and then the DC side.
Wait for 30 seconds, then turn on the
AC side and then the DC side
- If the fault persists, contact your
distributor
- Check that the ambient temperature
is within the specification. Refer to 9.
Technical Data
- Check if the ventilation is sufficient,
the minimum distances are compliant
with those stated in this User Manual
and the inverter is shielded from
direct sunshine
- Clean ventilation area. Refer to User
Guide.
- Contact your distributor
41
Display Message
Current / power limitation
(W/A – E14)
Description
PV power exceeds inverter
rating
Communication failure (A –
E15)
Internal communication
failure
Fan failure (W/A – E16)
Internal air circulation has
failed
One or more fuses or circuit
breakers are blown, or the
jumper for the grounding
setup is positioned
incorrect
Fuse fault (A – E17)
Active power limitation (W/A
– E18)
Reactive power
compensation (W/A – E19)
Microprocessor fault (W/A –
E20)
Ground current trip (A – E21)
High AC voltage (A – E22)
Low AC voltage (A – E23)
42
Action
- The inverter will try to start up again
when the temperature is within the
permissible range again
- Check if the ventilation is sufficient,
the minimum distances are compliant
with those stated in this manual and
the inverter is shielded from direct
sunshine
- Clean ventilation area. Refer to User
Guide.
- If the inverter is in Shutdown, turn off
the AC side and then the DC side.
Wait for 30 seconds, then turn on the
AC side and then the DC side
- If the fault persists, contact your
distributor
- Contact your distributor for
replacement
- Check the jumper position (2.4.3.4.
Jumper Position for the System
Grounding Setup)
- Contact the system installer for DC
fuse replacement
*
*
Too high AC voltage, the
inverter stops feeding
power
Too low AC voltage, the
inverter stops feeding
power
- If the inverter is in Shutdown, turn off
the AC side and then the DC side.
Wait for 30 seconds, then turn on the
AC side and then the DC side
- If the fault persists, contact your
distributor
*
- The inverter will restart when the
voltage is within the permissible
range
- Check that the country settings have
been successfully set in Setup > Grid
Setup
- If the failure persists, contact the
system installer
- The inverter will restart when the
voltage is within the permissible
range
- Check that the country settings have
been successfully set in Setup > Grid
Setup
- If the failure persists, contact the
system installer
Installation Guide DLX series L00410622-01
Display Message
High frequency on output
side (W/A – E24)
Description
The frequency of the utility
voltage is above the upper
limit
Low frequency on output
side (W/A – E25)
The frequency of the utility
voltage is below the lower
limit
High output DC current (W/A
– E26)
Too high proportion of DC
current in the grid feed
Output current imbalance (W
– E27)
Imbalance in the output
current between the phases
(3 phase only)
Fault ride-through
Grid fault, still running (W –
E28)
VDR fault DC side (W – E29)
The varistors on the DC side
are damaged.
Action
- The inverter tries to restart when the
frequency is within the permissible
range
- Check that the country settings have
been successfully set in Setup > Grid
Setup
- If the failure persists, contact the
system installer
- The inverter tries to restart when the
frequency is within the permissible
range
- Check that the country settings have
been successfully set in Setup > Grid
Setup
- If the failure persists, contact the
system installer
- The inverter tries to restart when the
fault is cleared
- If the fault still occurs, contact your
distributor
*
*
- Contact your distributor for new
parts
* Reserved for future use
Installation Guide DLX seriesL00410622-01
43
7. Maintenance and Disposal
Regular inspection of the PV system is an important safety precaution to ensure troublefree operation of the entire PV plant and the DLX inverter.
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 and responsible means of disposal.
7.1. Regular System Inspection
The DLX inverters are designed and manufactured to operate trouble-free for many years.
Performing regularly maintenance will ensure high efficiency and a longer service life for
the inverters.
NOTICE
• Prior to service and maintenance work the inverter should always be
disconnected on both the AC and the DC sides and discharged to avoid shock
hazards.
• For service or maintenance the inverter must be de-energized for 1 hour to
discharge the capacitor bank.
• The inverter upper cover is to be opened only by Danfoss service persons or
service partners authorized by Danfoss due to danger of damage to internal
components and invalidated warranty.
Refer to User Guide for more detailed information about the discharge procedure
of the capacitor bank and about regularly maintenance of the inverter.
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Installation Guide DLX series L00410622-01
8. Warranty
The inverters are compatible with all relevant standards and are guaranteed to be free of
defects from the date of purchase.
8.1. Warranty Disclaimer
The warranty is void through misuse or when unauthorized repairs are performed on the
inverter. The warranty does not cover normal wear and tear of the inverters or costs related
to installation and troubleshooting of the electrical system. The warranty is only valid with
an identifiable and accepted serial number.
8.1.1. Damage
Danfoss takes no responsibility for damages to the inverter due to:
• Unauthorized persons removing the inverter upper cover.
• Unauthorized modifications made to the inverter.
• Inverter is installed, commissioned, operated or maintained incorrectly.
• Relevant safety regulations and instructions in this User Guide being ignored.
• Inverter operating beyond the limit values given in the 9. Technical Data
• Inverter exposed to external abnormal conditions such as lightening, storms, fire,
vandalism etc.
8.2. End of Life Disposal
• In case of return as a result of end of service life, the inverter can be returned to your local
distributor or disposed of in the respective country.
• The shipping is paid by sender. Recycling and disposal of the DLX inverter must be done
according to the rules and regulations applicable in the country of disposal.
• All material used for the packaging is recyclable.
Installation Guide DLX seriesL00410622-01
45
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Installation Guide DLX series L00410622-01
9. Technical Data
|S|
P
Q
Vac,r
Vac, min; Vac, max
Iacmax
Cosphi ac,r
fr
fmin, fmax
Vdc,r
Vmppmin Vmppmax
Parameter
AC
DLX 2.0
Rated apparent power
Rated active power @ cosphi = 1
Reactive power range
Controlled power factor range
Rated output voltage
AC voltage range (P-N. P-P)
Nominal output current
Max output current
AC current distortion (THD %)
Power Factor (cos φ)
Night-time power loss
Mains frequency
Grid frequency range
DC
Nominal DC power
Max recommended PV power
Nominal voltage DC
MPP voltage-nominal power
MPP efficiency
Max. DC voltage
Turn on voltage
Turn off voltage
Max current DC
Max. short circuit current DC at STC
Min. on grid power
Efficiency
Maximum efficiency
CEC efficiency
EU efficiency
Other
Dimensions
Mounting recommendation
Weight
Sealing grade
Acoustic noise level
Operation temperature range
Storage temperature
Relative humidity
Number of PV string inputs
Number of MPP trackers
Protection against excessive PV power
Overvoltage category AC / DC
Reverse polarity protection
Ground fault monitoring
Integral DC switch
PV grounding
2000 VA
2000 W
0-1600 VAr
Topology
Performance monitoring
PV connection
AC/grid connection
Ethernet
RS-485 / CAN
Functional safety
Safety (protective class)
Islanding detection/ loss of mains
RCD type A recommendation
Indirect contact protection
Voltage & frequency surveillance
Insulation resistance surveillance
DC content of AC current surveillance
Installation Guide DLX seriesL00410622-01
9.0 A
10.5 A
2100 W
2625 W
9.5 A
9.5 A
97.2 %
96.8 %
96.3 %
DLX 2.9
DLX 3.8
DLX 4.6
2900 VA
3800 VA
4600 VA
2900 W
3800 W
4600 W
0-2320 VAr
0-3120 VAr
0-3680 VAr
0.8 over-excited, 0.8 under-excided
230 V
230 V±20%, single or split phase
13.0 A
17.0 A
20.0 A
15.2 A
19.7 A
23.0 A
2.59%
3.36%
0.8 over-excited, 0.8 under-excided
<1W
50 Hz
50 Hz ± 5 %
3000 W
4000 W
3750 W
5000 W
220 – 480 V
230 – 480 V
99.9%
600 V
230 VDC
220 VDC
13.5 A
18.0 A
13.5 A
18.0 A
7W
97.2 %
96.8 %
96.5 %
97.2 %
97.0 %
96.7 %
4800 W
6000 W
220 - 480 V
250 - 480 V
21.0 A
21.0 A
97.3 %
97.0 %
96.9 %
610 x 353 x 158 mm(169.5 mm with bracket)
Wall bracket
19 kg
21 kg
IP65
< 37dB (A)
-25 to +65 °C (Possible power derating above +45 °C)
-30 °C to + 80 °C
4 to 99%
3
1
Yes
Class B / Class B
Yes
Yes
Yes
Field configurable for ungrounded, positive grounded or
negative grounded
High frequency transformer, galvanic isolation
Graphical colour display with 6 touch sense buttons, 3x
LEDs for visual status indication, Built-in Web Server
SunClix
Screw terminals
1 x RJ45
Screw terminals
Class I
Active Frequency Shift
Yes
Yes, (Start class I, grounded)
Included
Included
Included
47
Danfoss Solar Inverters A/S
Ulsnaes 1
DK-6300 Graasten
Denmark
Tel: +45 7488 1300
Fax: +45 7488 1301
E-mail: solar-inverters@danfoss.com
www.solar-inverters.danfoss.com
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.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Rev. date 2012-05-21 Lit. No. L00410622-01_02