Danfoss DLX 2.0 Installation Manual
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Danfoss DLX 2.0 Installation Manual

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MAKING MODERN LIVING POSSIBLE
DLX

Installation Guide

DLX 2.0 - DLX 2.9 - DLX 3.8 - DLX 4.6
SOLAR INVERTERS

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Summary of Contents for Danfoss DLX 2.0

  • Page 1: Installation Guide

    MAKING MODERN LIVING POSSIBLE Installation Guide DLX 2.0 - DLX 2.9 - DLX 3.8 - DLX 4.6 SOLAR INVERTERS...
  • Page 2 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.

  • Page 3: Table Of Contents

    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.

  • Page 4: 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.

  • Page 5: Unpacking And Inspection

    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...

  • Page 6: Scope Of Delivery

    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.
  • Page 7 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.

  • Page 8: Installation

    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...

  • Page 9: Mechanical Installation

    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. •...
  • Page 10 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.
  • Page 11 Figure 2.2.2: Inverter bracket Figure 2.2.3: Distances between fixing screws 1. Carrier slots for the inverter D1. 232.5 mm 2. Steering slots for the inverter D2. 232.5 mm 3. Carrier slots for the Stringbox D3. 75 mm 4. Fixing clip D4.

  • Page 12: Checks Prior To Installation

    • 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...

  • Page 13: Electrical Installation

     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.
  • Page 14 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.
  • Page 15 NOTICE Maximum Voltage: The open circuit voltage, V , must never exceed 600 V 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.
  • Page 16 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.
  • Page 17 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.
  • Page 18 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.
  • Page 19 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: •...
  • Page 20 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 mm / 6 AWG.
  • Page 21 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.
  • Page 22 • Ethernet: Use CAT5e or better, with size 0.21 mm /24 AWG, with a maximum total length of 100 m. • CAN: Use CAT5e or better, with size 0.21 mm /24 AWG, with a maximum total length of 500 m. •...

  • Page 23: Required Safety Equipment

    CAN and RS-485 connection pinout 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. •...

  • Page 24: Checks Before Start Up

    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. ...

  • Page 25: Start Up

    3. Start Up A minimum available voltage of 184 V , 230 V and a power greater than 7 W required before the inverter starts feeding power to the grid. AC side • Turn ON the AC circuit breaker(s). DC side •...

  • Page 26: User Interface

    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. •...
  • Page 27 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 Function Action Malfunction! Inverter in shutdown Look for alarms in mode Active Alarms Green...
  • Page 28 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..
  • Page 29 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 –...
  • Page 30 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 –...
  • Page 31 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.
  • Page 32 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.
  • Page 33 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.
  • Page 34 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 •...
  • Page 35 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 –...

  • Page 36: Self Test For Italy

    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.
  • Page 37 • 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. •...

  • Page 38: Connection Between Inverter And Pc

    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.

  • Page 39: Internal Web Server

    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. •...

  • Page 40: Troubleshooting

    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.
  • Page 41 Display Message Description Action No detection of the grid, - Verify if the AC circuit breaker is ON Grid fault (W/A – E05) not able to synchronize and operational with the grid or fault within - Measure that the grid voltage is the country-settings present at the AC terminals - Check that the DC switch(es) is ON...
  • Page 42 Display Message Description Action Current / power limitation PV power exceeds inverter - The inverter will try to start up again (W/A – E14) rating 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...
  • Page 43 Display Message Description Action High frequency on output The frequency of the utility - The inverter tries to restart when the side (W/A – E24) voltage is above the upper frequency is within the permissible limit range - Check that the country settings have been successfully set in Setup >...

  • Page 44: Maintenance And Disposal

    • 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.

  • Page 45: Warranty

    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.
  • Page 46 Installation Guide DLX series L00410622-01...

  • Page 47: Technical Data

    9. Technical Data Parameter DLX 2.0 DLX 2.9 DLX 3.8 DLX 4.6 Rated apparent power 2000 VA 2900 VA 3800 VA 4600 VA Rated active power @ cosphi = 1 2000 W 2900 W 3800 W 4600 W Reactive power range...
  • Page 48 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.

This manual is also suitable for:

Dlx 2.9Dlx 3.8

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