Sofar 250KTLX0 User Manual
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Sofar 250KTLX0 User Manual

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USER
MANUAL
SOFAR 250...350KTL
Shenzhen SOFARSOLAR Co., Ltd.
Shenzhen SOFARSOLAR Co., Ltd.

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  • Page 1 USER MANUAL SOFAR 250...350KTL Shenzhen SOFARSOLAR Co., Ltd. Shenzhen SOFARSOLAR Co., Ltd.
  • Page 2 Shenzhen SOFARSOLAR Co., Ltd. Shenzhen SOFARSOLAR Co., Ltd. 11/F, Gaoxinqi Technology Building, District 67, XingDong Community, XinAn Street, Bao’An District, Shenzhen, China SOFARSOLAR GmbH Krämerstrasse 20 72764 Reutlingen Germany Email: service.uk@sofarsolar.com service@sofarsolar.com Web: www.sofarsolar.com Document number Issue 01 / 02.2024 English...

  • Page 3: Table Of Contents

    Content Content Basic Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 .1 Requirement for Installation and Maintenance .
  • Page 4 SOFAR Monitor APP . . . . . . . . . . . . . . . . . . .
  • Page 5 Outline Outline This document describes the assembly, installation, commissioning, mainte- nance and fault clearance of the SOFAR 250KTLX0, SOFAR 330KTLX0, SOFAR 333KTLX0, 333KTLX1, SOFAR 350KTLX0, SOFAR 330KTLX1, SOFAR 333KTLX1, SOFAR 350KTLX1(also referred to as SOFAR 250~350KTL series). Please read it carefully before operating. Ensure that you are familiar with the features, functions, and safety precautions provided in this document.
  • Page 6 “Attention” indicates there are potential risks, if fail to prevent, may lead to equipment cannot normally or property damage. NOTICE NOTICE − “Note” provides additional information and tips that are valuable for the optimal operation of the product. 2/96 SOFAR 250...350KTL...

  • Page 7: Basic Safety Information

    Shenzhen SOFARSOLAR CO., Ltd. Safety Instruction Safety Instruction Introduce the safety instruction during installation and operation of SOFAR 250~350KTL series. Symbols Instruction Symbols Instruction This section gives an explanation of all the symbols shown on the inverter and on the type label.
  • Page 8 Label and Symbols Label and Symbols SOFAR 250~350KTL series has type label attach the side of product which contact important information and technical data, the type label must permanent attached to the product.
  • Page 9 Basic Safety Information DANGER DANGER − Before the electrical connection, use opaque material to cover the PV modules or disconnect PV string DC switch. PV arrays will produce danger- ous voltage if it is exposure under sun WARNING WARNING All operation must accomplish by certified electrical engineer. All operation must accomplish by certified electrical engineer.

  • Page 10: Symbols And Signs

    Ensure the maximum DC voltage input is less than the maximum inverter DC voltage (including in low temperature WARNING WARNING condition). Any damage cause by overvoltage, SOFARSOLAR will not take the responsibility including warranty. 6/96 SOFAR 250...350KTL...
  • Page 11 Signs on the Product and on the Type Label Signs on the Product and on the Type Label SOFAR 250~350KTL series has some safety symbols on the inverter. Please read and fully understand the content of the symbols before installation.

  • Page 12: Product Characteristics

    2 .1 Intended Use Intended Use SOFAR 250~350KTL series is a transformerless on grid PV inverter, that convert- ers the direct current of the PV array to the grid-compliant, three-phase current and feeds into the utility grid. SOFAR 250~350KTL series may only be operated with PV arrays (photovoltaic module and cabling) for on grid condition.
  • Page 13 Product Dimensions Product Dimensions The choice of optional parts of inverter should be made by a qualified techni- cian who knows the installation conditions clearly. Dimensions Description Dimensions Description • SOFAR 250~350KTL series W×H×D=1159×828×366mm Installation and User Manual 9/96...
  • Page 14 Product Characteristics Labels on the equipment Labels on the equipment label must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.,); they must be cleaned regularly and kept visible at all times. 10/96 SOFAR 250...350KTL...

  • Page 15: Function Description

    Product Characteristics 2 .2 2 .2 Function Description Function Description DC power generated by PV arrays is filtered through Input Board then enter Power Board. Input Board also offer functions such as insulation impedance detection and input DC voltage/ current detection. DC power is converted to AC power by Power Board.
  • Page 16 “Night SVG mode”, and the desired reactive power output can be controlled through the APP, while the inverter stays in the “Night SVG mode” mode. Cur- rently, the SOFAR 250~350KTL supports SVG settings in the range of ±30% of rated power.

  • Page 17: Circuit Diagram

    PV 1- DC/AC Filter Filter PV n+ MPPT n PV n- Relay Switch SOFAR 250~350KTL series utilizes multiple MPPT trackers to uesd to ensure a maximum power from PV arrays at different PV input conditions. Installation and User Manual 13/96...

  • Page 18: Dc Switch Descriptions

    The DC switch is disconnected. DC SWITCH automatically breaks and disconnects when a fault occurs. Please check the type of fault through the “SOFAR SETTING” APP first, wait at least 3min after troubleshooting, and operate under the guidance of the tech- nical support staff.

  • Page 19: Inverter Storage

    Inverter Storage Inverter Storage Inverter Storage If inverter is not installing immediately, storage condition need meet below requirements: • Place inverter into the original package and leave desiccant inside, sealed tight with taps. • Do not tilt or invert the box. • Store in a clean and dry place and protect from dust and moisture. Do not subject to rain or ground water erosion.

  • Page 20: Installation

    ATTENTION ATTENTION − Consider the weight of this product when doing transport and moving. − Choose an appropriate mounting position and surface. − At least four persons for installation. 16/96 SOFAR 250...350KTL...

  • Page 21: Installation Process

    Table 4-1Components and mechanical parts that inside the package Image Qty Description Image Qty Description SOFAR Rear Panel 250...350KTL series PV+ input con- PV- input con- nector nector *24pcs(250KTLX0) *24pcs(250KTLX0) PV+ metal pin PV- metal pin *24pcs(250KTLX0) *24pcs(250KTLX0) Installation and User Manual 17/96...

  • Page 22: Tools

    Installation tools include, but are not limited to, those recommended below. Other auxiliary tools may be used in the field if necessary.Prepare tools re- quired for installation and electrical connection as following table: Table 4-2 Installation tools Hammer drill Screwdriver Removal tool Wire stripper 18/96 SOFAR 250...350KTL...

  • Page 23: Determining The Installation Position

    Installation Crescent wrench Hammer M6 Allen key Socket wrench Crimping tool Multimeter Marker Measuring tape Spirit level ESD gloves Anti-dust respi- Safety goggles ratory mask 4 .4 4 .4 Determining the Installation Position Determining the Installation Position Select a appropriate location to install the product to make sure the inverter can work in a high efficiency condition.
  • Page 24 It is necessary to select a location for mounting the inverter that has suffi- cient load-bearing capacity to ensure that the inverter can work properly and efficiently. When selecting a mounting location, consider the following require- ments: 20/96 SOFAR 250...350KTL...
  • Page 25 Installation For multiple inverter installation scenarios, zigzag installation is recommended when there is enough space. Zigzag, back-to-back and wall mounting are not recommended. Zigzag, back-to-back and near-wall mounting require users to provide their own windshield to isolate the inverters from the incoming and outgoing air.

  • Page 26: Moving Of Inverter

    Manual handling Unload the inverter from package, horizontally move to the install po- sition. When open the package, at least two operator insert the hands into the slots on both side of the inverter and hold the handles. 22/96 SOFAR 250...350KTL...
  • Page 27 Installation ATTENTION ATTENTION − Keep the balance when lift the inverter. Required at least two operators for lifting or use forklift. Inverter is heavy, dropped while being transported may cause injuries. − Do not put the inverter with wiring terminals contacting the floor because the power ports and signal ports are not designed to support the weight of the inverter.

  • Page 28: Installation

    4 .6 Installation Installation Always make sure the inverter is free of any electrical connections before in- stalling the inverter. Before drilling, make sure that you avoid any utility align- ments in the wall to avoid any hazards! 24/96 SOFAR 250...350KTL...
  • Page 29 Installation Installed on wall Installed on wall： ： 1. 1. Placed the rear panel on the mounting wall, determine the mounting height of the bracket and mark the mounting poles accordingly. Drilling holes by using Hammer Drill, keep the hammer drill perpendicular to the wall and make sure the position of the holes should be suitable for the expansion bolts.(Use M12*50 bolts with their own flat pads to fix the wall bracket;...
  • Page 30 Align the rear panel with the hole positions, fix the rear panels on the wall by tightening the expansion bolt with the nuts. Lift the inverter and hang it on the bracket, and fixing both sides of invert- er with M6 screw (accessories). 26/96 SOFAR 250...350KTL...
  • Page 31 Installation Installing the bracket on a stand Installing the bracket on a stand 1. 1. Use wall mount bracket, ensure the pole position are in same level by us- ing level rule and mark the holes. Drilling holes by using a Hammer Drill, recommend to do a stain proofing. Use M12 screw and M12 flat washer to secure the wall bracket.
  • Page 32 Lift the inverter and hang it on the wall bracket, and fixing both side of inverter with M6 screw(repeat 4.6.1step 4). Note: If height between ground and bracket is less than 1.5m, use auxiliary handle for installation. Otherwise, use lifting equipment. 、 、 28/96 SOFAR 250...350KTL...

  • Page 33: Electrical Connections

    Electrical Connections Electrical Connections Electrical Connections Outlines of this Chapter Outlines of this Chapter This section introduces the electrical connection for the product. Please read the information carefully, it may helpful to understand the grounding wiring, DC input connection, AC output connection and communication connection. Caution: Caution: Before performing electrical connections, ensure the DC switch is OFF and AC...

  • Page 34: Electrical Connection

    5.8 Communication Connection Introduce the propose USB/Ethernet, COM and how to connect USB/Ethernet port. 5 .1 5 .1 Electrical Connection Electrical Connection 5 .2 5 .2 Terminal Connector Terminal Connector Connector description as below: Connector description as below: 30/96 SOFAR 250...350KTL...

  • Page 35: Grounding Connection (Pe)

    Electrical Connections Label Description PVX+/PVX- PV connector RS485 Communication port/ DRMs port USB/WIFI USB port Ethernet Ethernet port AC output terminal Tracking Axis Power Tracking System Power Wiring Terminal Connecting terminal of the ground , choose at least one for grounding connection Grounding Reliable grounding for inverters *Note: Lock the screw to limit the torque of the DC switch, making it impos-...
  • Page 36 NOTE NOTE − SOFAR 250~350KTL series is a transformerless inverter which requires the positive pole and negative pole of the PV array are NOT grounded. Other- wise, it will cause inverter failure. In the PV system, all non-current-carrying metal parts (such as mounting frame, combiner box enclosure, etc.) should be connected to earthed.
  • Page 37 Electrical Connections Insert the exposed core wires into the OT terminal and crimp them by using a crimping tool, as shown as figure 5.3. Recommend using OT termi- nal: OTM8, Cable: ≥16mm2. • L3 is the length between the insulation layer of the ground cable and crimped part.

  • Page 38: Connect Grid Side Of Inverter(Ac-Output)

    Please do not unused screw in the wiring box. • Use M6 driver to unscrew the two screws on the wiring box,open wiring box cover. Use M6 screw driver to unscrew the two screws on the wiring box. 34/96 SOFAR 250...350KTL...
  • Page 39 Electrical Connections 5 .4 .2 Wiring Terminal and Precautions 5 .4 .2 Wiring Terminal and Precautions • Before connect to grid, please ensure the grid voltage and frequency of local grid meet the requirement of inverter, any question please seek local grid company for help.
  • Page 40 5 .4 .3 Wring Procedure 5 .4 .3 Wring Procedure The section will use a multi-core wire as a sample, single-core wire has same connection process. 36/96 SOFAR 250...350KTL...
  • Page 41 Electrical Connections Name Type Area(mm²) Outer Diameter AC output ● If the ground ● Copper cable: 24–66 mm power cables(- point on the S: 70-185 mm² multi-core) enclosure is used, Sp ≥ S/2 three-core (L1, L2, ● Aluminum and L3) outdoor cables and M12 alloy cable or cop- OT/DT terminals...
  • Page 42 Unscrew the nut of the AC terminal block and select the sealing ring ac- cording to the outer diameter of the cable. Insert the nut, sealing ring into the cable in sequence. Remove the insulation layer of an appropriate length according to figure below. Crimp the terminal. 38/96 SOFAR 250...350KTL...
  • Page 43 Electrical Connections Depending on the grid configuration, connect L1, L2, L3 and N to the ter- minals according to the label and tighten the screw on the terminal using a screwdriver. Multi-core wire wiring diagram: Single core wire wiring diagram: Select single-core wire, before wiring, you need to replace the already in- stalled in the machine plugs with the single-core over-wire plugs supplied with the shipment.
  • Page 44 AC output wire is subjected to tensile force due to force majeure. After wiring is completed, the cables should not be pressed against the inter-phase baffle and should not be cross-wound. 40/96 SOFAR 250...350KTL...
  • Page 45 Electrical Connections Attention: Attention: Inverter protective grounding is recommended to prioritize the chassis enclo- sure grounding point. The chassis grounding point is mainly used to connect the grounding wire contained in the multi-core AC line; It is recommended that the inverter be grounded near the end, and the grounding is stable and reliable, and the lap resistance is less than 0.1Ω.

  • Page 46: Connect The Power Cord Of The Tracking System (Optional)

    OT terminal and press it tightly with a crimping pliers. thread the fabricated cable into the waterproof joint; connect the cable with the corresponding terminal, tighten the nut and fix the terminal. 42/96 SOFAR 250...350KTL...

  • Page 47: Connect Pv Side Of Inverter (Dc-Input)

    Electrical Connections OD≤18mm 5 .6 5 .6 Connect PV side of inverter (DC-Input) Connect PV side of inverter (DC-Input) • Connecting PV strings into inverter must following the below procedure. Otherwise, any faulty cause by inappropriate operation will be including in the warranty case.
  • Page 48 Insert wire into the connector cap nut and assemble into the back of male or female plug, When you heard a “click”, the pin tact assembly is seated correctly. (3. Positive Connector, 4. negative connector). 44/96 SOFAR 250...350KTL...
  • Page 49 Electrical Connections Measure PV voltage of DC input with multimeter, verify DC input cable polar and connect DC connector with inverter until hearing a slight sound indicated connection succeed. Please use multimeter to make sure the PV array positive pole and negative pole! When wiring in the field, the DC input line should be naturally sagging not less than 50mm, the axial tension on the PV connector should not exceed 80N, and...

  • Page 50: Recommended Wiring Methods

    For example, when the number of input strings is 20 to 31, the recommended connection of DC input terminals is as follows. Strings Terminal Selection number MPPT1/MPPT3/MPPT5/MPPT7 are connected to 3 strings respec- tively, MPPT2/MPPT4/MPPT6/MPPT8 are connected to 2 strings respec- tively. 46/96 SOFAR 250...350KTL...
  • Page 51 Electrical Connections Strings Terminal Selection number MPPT1/MPPT3/MPPT5/MPPT7/MPPT8 are connected to 3 strings respectively, MPPT2/MPPT4/MPPT6 are connected to 2 strings respectively. MPPT1/MPPT2/MPPT3/MPPT5/MPPT7/MPPT8 are connected to 3 strings respectively, MPPT4/MPPT6 are connected to 2 strings respectively. MPPT1/MPPT2/MPPT3/MPPT4/MPPT5/MPPT7/MPPT8 are con- nected to 3 strings respectively, MPPT6 are connected to 2 strings respectively.

  • Page 52: Communication Connection

    PC terminal or local data acquisition device, then uploaded to the server. Register remote monitoring of SOFAR 250~350KTL series at its relevant website or APP accord- ing to monitoring device SN. 48/96...
  • Page 53 Electrical Connections COM—Multi function communication port COM—Multi function communication port Port Description: Port Description: Name Function Note RS485A RS485 signal+ Wire connection monitoring or mul- RS485A RS485 signal+ tiple inverter moni- toring RS485B RS485 signal- RS485B RS485 signal- Electric meter Electric meter RS485 Wire connection RS485A...
  • Page 54 Pin name Description Connected to (RRCR) Relay contact 1 input K1 - Relay 1 output K1 - Relay 1 output Relay status: close is 1, open is 0 Active Power Power drop rate Cos(Φ) ＜5 seconds 100% 50/96 SOFAR 250...350KTL...
  • Page 55 PC terminal or local data acquisition device, then uploaded to the server. If only one SOFAR 250~350KTL series is used, use a communication cable, refer to section 5.6.2 for COM pin definition, and choose either of the two RS485 ports.
  • Page 56 Electrical Connections PLC Technical parameters of communication module PLC Technical parameters of communication module： ： Technical Index Parameter Input power 24VDC Input Current 0.25ADC Maximum communication distance 1000m PLC Input Voltage line voltage 320～920VAC/50/60HZ/three-phase Communication RS232/PLC 52/96 SOFAR 250...350KTL...
  • Page 57 Electrical Connections PLC installation and cable routing specifications: PLC installation and cable routing specifications: Inverter installation location requirements: inverter installation location can not be close to the place of serious magnetic field interference, to avoid interference to the PLC communication signals. Requirements of load side: There should be no big capacitance load be- tween the load phase and phase of the AC output side of the connected inverter, if there is capacitance, the capacitance value is suggested to be less...

  • Page 58: Commissioning Of Inverter

    Commissioning of Inverter Commissioning of Commissioning of Inverter Inverter Outlines this Chapter Outlines this Chapter Introduce SOFAR 250~350KTL series safety inspection and start processing. 6 .1 6 .1 Check Before Power-On Check Before Power-On ATTENTION ATTENTION − Before starting up the equipment for the first time (test run), all operations performed on the equipment should be thoroughly checked.

  • Page 59: Start Inverter

    Commissioning of Inverter 6 .2 6 .2 Start Inverter Start Inverter ATTENTION ATTENTION − DC switch has the function of automatic breaking, if the wiring has the phenomenon of string reverse connection, string overcurrent, etc., it will trigger the DC switch automatic breaking protection, please check the corresponding fault information in the Shouhang cloud monitoring APP, refer to the instructions in section 9.3 to check the alarm, and confirm that the alarm disappears before you close the DC switch.
  • Page 60 If there is a DC switch debounce, it means that the DC switch corresponding to the PV branch has a reverse connection phenomenon, after re-checking the defective, correctly connected to the inverter, close the debounce DC switch. 56/96 SOFAR 250...350KTL...
  • Page 61 Commissioning of Inverter Disconnect the DC SWITCH1 switch, connect the remaining strings to the MPP1 and MPPT2 branches correctly, and close the DC SWITCH1 switch. If there is no DC switch release, it means that all strings are connected correctly. If there is a DC switch debounce, it means that the DC switch corresponding to the PV branch has a reverse connection phenomenon, after re-checking the defective, correctly connected to the inverter, close the debounce DC switch.

  • Page 62: Sofar Monitor App

    SOFAR Monitor APP Overview Overview SOFAR Monitor is a new efficient, safe, fast and intelligent photovoltaic mon- itoring software, complete the near-end debugging and remote monitoring Settings. From the creation of power Plants to management, operation and maintenance, realize integrated services, easy to master your power Plant infor- mation.

  • Page 63: Account Registration And Login

    Account Registration and Login Account Registration and Login Registration Registration If you do not have an account of SOFAR Monitor, please enter the registration page on the login interface. Registration page Registration page Please click the “Register account” button to enter the registration page.
  • Page 64 SOFAR Monitor APP Complete registration Complete registration Note: Users please select the user account type registration, if you have regis- tered again, the password for the old password. follow the prompts to complete the registration process At present, we support cell phone number or email account for account regis- tration;...

  • Page 65: Local Control

    SOFAR Monitor APP Login Login If you already have an account of SOFAR Monitor, please log in directly on the login page. 7 .3 7 .3 Local Control Local Control Before using this function, please turn on the Bluetooth of your cell phone in advance, and you need to apply for permission to open before you can carry out safety regulations and firmware operations.
  • Page 66 SOFAR Monitor APP Bluetooth Connection Bluetooth Connection The first step is to choose the connection method: enter the application inter- face and click [Local Control], in the page you can connect your cell phone to the inverter through Bluetooth communication to realize the functions of near- field operation and maintenance, debugging, upgrading and safety regulation.
  • Page 67 SOFAR Monitor APP Searching: Searching: Click [Search] will jump to the list of Bluetooth devices and start searching for nearby available Bluetooth devices. Select the device you want to connect according to the inverter serial number. Installation and User Manual...

  • Page 68: About The Software

    SOFAR Monitor APP After successfully connecting the device, enter the Bluetooth home page. 7 .4 7 .4 About the Software About the Software For the introduction of APP functions and specific operation, please click “My” page, and click [Personal Settings] to enter the sidebar, and click [Personal Set- tings], and you can view the operation manual in the page.
  • Page 69 SOFAR Monitor APP Installation and User Manual 65/96...

  • Page 70: Operational Interface

    In upgrading: fast flashing (on for 200ms/off for 200ms); In detection: slow flash (200ms on/ 1s off). Red (ALARM) = Recoverable fault or permanent fault status. Red (FAULT) on = GFCI leakage current fault or low insulation impedance alarm, LED on and buzzer sounding. 66/96 SOFAR 250...350KTL...

  • Page 71: Online Software Upgrade

    The steps to upgrade the program by using Shouhang Cloud Monitor APP are as follows: Enter the local control of SOFAR Monitor APP, connect the inverter success- fully, enter the operation and maintenance interface, and then click “Firm- ware Upgrade” to enter the firmware upgrade page.
  • Page 72 When the progress of firmware download is completed, you will enter the progress of firmware upgrade, when the progress is completed, the Finish button in the box will turn blue, click “Finish”. 68/96 SOFAR 250...350KTL...
  • Page 73 Operation Installation and User Manual 69/96...

  • Page 74: Troubleshooting And Maintenance

    Troubleshooting and Maintenance Troubleshooting and Troubleshooting and Maintenance Maintenance 9 .1 9 .1 Normal shutdown and power down opera- Normal shutdown and power down opera- tion tion 1. 1. Remote shutdown setting through the machine display, or sending shut- down command in Bluetooth APP or management system, for de- tails, please refer to the user manual of the corresponding product or con- sult the after-sales personnel; After the remote shutdown is successful, make sure the output pow- er of the inverter is 0, and then disconnect the switch between the invert- er and the power grid;  Disconnect the DC switch; Caution: Caution: When the machine is working normally, it is strictly forbidden to discon- nect the AC and DC side switches directly, so as not to damage the switch- es by arcing danger. It may also cause damage to the inverter in serious cases. Ground fault alarm 70/96 SOFAR 250...350KTL...

  • Page 75: Fault Power-Down Operation

    Troubleshooting and Maintenance 9 .2 9 .2 Fault power-down operation Fault power-down operation Operation steps  Operation steps  Wear personal protective equipment and avoid touching the electrically charged parts of the inverter before performing the maintenance and pow- er down operation, otherwise it may lead to electric shock or arcing fire. If the inverter is not fault shutdown, set the remote shut down through the machine display, or send theshutdown command in the Bluetooth APP, management system side.
  • Page 76 Are the configuration settings correctly for the particular installation? This section contains the potential errors, resolution steps, and provide users with troubleshooting methods and tips. The process to check the event list can refers to SOFAR Monitor APP. 72/96 SOFAR 250...350KTL...
  • Page 77 Troubleshooting and Maintenance Table 9-1 Even listEvent list Name Name Description Description Solution Solution If the alarm occurs occasion- GridOVP The grid voltage is ally, the possible cause is that too high the electric grid is abnormal occasionally. Inverter will automatically return to normal operating status when the electric grid’s back to normal.
  • Page 78 VGrid(AC) sampling error (AC) 021 GFCIDevice- Leakage current Fault(DC) sampling error(DC) 022 HwADErrDCI(AC) Wrong sampling of dc component of grid current 023 HwADErrVGrid(DC) Power grid voltage sampling error (DC) 024 HwADErrVGrid(AC) Power grid voltage sampling error (AC) 74/96 SOFAR 250...350KTL...
  • Page 79 Troubleshooting and Maintenance Name Name Description Description Solution Solution 025 HwADErrDCI(DC) DCI Sampling Error (DC) 026 HwADErrIdc- Branch 027 PVLowImpedance PV- Low impedance to PE 028 PIDAbnormalOut PID Abnormal Output 029 ConsistentFault_ Leakage current GFCI consistency error 030 ConsistentFault_ Grid voltage consis- Vgrid tency error 031 ConsistentDCI...
  • Page 80 053 TempErrHeatSink4 Radiator 4 tempera- ture protection 054 TempErrHeatSink5 Radiator 5 tempera- ture protection 055 TempErrHeatSink6 Radiator 6 tempera- ture protection 056 TempDiffErrInv Temperature difference error of inverter module 76/96 SOFAR 250...350KTL...
  • Page 81 Troubleshooting and Maintenance Name Name Description Description Solution Solution 057 TempErrEnv1 Ambient tempera- ture 1 protection 058 TempErrEnv2 Ambient tempera- ture 2 protection 059 TempErrInv1 Module 1 tempera- ture protection 060 TempErrInv2 Module 2 tempera- ture protection 061 TempErrInv3 Module 3 tempera- ture protection 062 TempFault_Inv4 Module 4 tempera-...
  • Page 82 074 FlyingCapOVP 075 FlyingCapUVP 076 PVUVP PV undervoltage protection 082 DciOCP Dci overcurrent protection 083 SwOCPInstant Output instan- taneous current protection 084 SwBuckBoostOCP BuckBoost software overcurrent protec- tion 085 SwAcRmsOCP Output effective value current pro- tection 78/96 SOFAR 250...350KTL...
  • Page 83 Troubleshooting and Maintenance Name Name Description Description Solution Solution 086 SwPvOCPInstant PV overcurrent soft- ware protection 087 IpvUnbalance PV flows in uneven parallel 088 IacUnbalance Unbalanced output current 089 SwPvOCP PV overcurrent soft- ware protection 090 IbalanceOCP Inverter bus balance current protection 091 SwAcCBCFault Software AC Over...
  • Page 84 114 FreqDerating Please make sure the grid fre- AC frequency is too quency and voltage is within high the acceptable range. 115 FreqLoading AC frequency is too 116 VoltDerating AC voltage is too high 80/96 SOFAR 250...350KTL...
  • Page 85 Troubleshooting and Maintenance Name Name Description Description Solution Solution 129 PermHwAcOCP switch OFF inverter, wait for Permanent hard- 5 minutes, then switch ON ware overcurrent inverter. Check whether the failure problem is solved. 130 PermBusOVP If no, contact technical sup- Permanent Bus port.
  • Page 86 3 of inverter is running nor- mally. 172 FanFault4 Please check whether the fan Fan 4 fault 4 of inverter is running nor- mally. 173 FanFault5 Please check whether the fan Fan 5 fault 5 of inverter is running nor- mally. 82/96 SOFAR 250...350KTL...
  • Page 87 Troubleshooting and Maintenance Name Name Description Description Solution Solution 174 FanFault6 Please check whether the fan Fan 6 fault 6 of inverter is running nor- mally. 175 FanFault7 Please check whether the fan Fan 7 fault 7 of inverter is running nor- mally.

  • Page 88: Maintenance

    OFF. Wait at least for 5 minutes before the Cleaning. Inverter cleaning Inverter cleaning Please clean the inverter with an air blower, a dry & soft cloth or a soft bristle brush. Do not clean the inverter with water, corrosive chemicals, detergent, etc. 84/96 SOFAR 250...350KTL...
  • Page 89 Troubleshooting and Maintenance Heat sink cleaning Heat sink cleaning For the long-term proper operation of inverters, ensure there is enough space around the heat sink for ventilation, check the heat sink for blockage (dust, snow, etc.) and clean them if they exist. Please clean the heat sink with an air blower, a dry &...
  • Page 90 Half a year or 1 year/1 grounding point is time connected normally and whether the grounding impedance is <1Ω; 2.Check whether the grounding point is loose, rusty, etc. If so, please replace the screws and re-lock them in time; 86/96 SOFAR 250...350KTL...

  • Page 91: Fan Replacement And Maintenance Instructions

    Troubleshooting and Maintenance Method of determina- Inspection content maintenance cycle tion Equipment operation 1. Whether the status At least half a year/1 status check of each indicator light time is normal when the equipment is running, and whether there is any fault alarm message in the control panel;...
  • Page 92 Troubleshooting and Maintenance equipment must be worn Remove the fan bracket fixing screws and secure them. Cut off the cable ties holding the fan cable and then disconnect all the con- necting terminals in turn. You can’t use brute force to pull out the terminals, you can use your finger- nail (tweezers or a small screwdriver are recommended) to press the mov- able buckle, and then pull out the two ends. 88/96 SOFAR 250...350KTL...
  • Page 93 Troubleshooting and Maintenance Remove the screws securing the fan bracket and pull the fan mount- ing bracket all the way outPull out the fan tray. Cut off the tie-wraps of the defective fan (the outermost FAN 7 is used as an example below, and the other fans work in the same way).Install a new fan. Remove the defective fan and keep the removed screws in a safe place. Lock the new fan in place.
  • Page 94 Connect the cables correctly according to the cable labels. Table 9-3, Comparison of Fan Failure Messages Fan Name FAN 3 FAN 4 FAN 5 FAN 6 FAN 7 FAN 8 Color Correspondi- CN23 CN22 CN27 CN26 CN29 CN28 ng PCBA port 90/96 SOFAR 250...350KTL...
  • Page 95 Troubleshooting and Maintenance Fan Name FAN 3 FAN 4 FAN 5 FAN 6 FAN 7 FAN 8 Correspondi- Fan 3 Fan 4 Fan 5 Fan6 Fan7 ng fault failure failure failure failure failure code Fan- Fan- Fan- Fan- Fan- Fault3 Fault4 Fault5 Fault6...
  • Page 96 Clean the fan using a soft-bristled brush or vacuum cleaner to remove any debris or mud left on the fan bracket. Push the cleaned fan bracket fully in against the mounting position and tighten the screws. connect the connectors according to the color and fan serial number. put the small baffle back on and tighten the screws. 92/96 SOFAR 250...350KTL...

  • Page 97: Technical Data

    Technical Data Technical Data 10 .1 10 .1 Input Parameters (DC) Input Parameters (DC) SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 250KTLX0 330KTLX0 333KTLX0 350KTLX0 330KTLX1 333KTLX1 350KTLX1 Max. input voltage 1500V Rated input 1160V voltage Start-up voltage 550V...

  • Page 98: Output Parameter (Ac)

    Technical Data 10 .2 10 .2 Output Parameter (AC) Output Parameter (AC) SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 250KTLX0 330KTLX0 333KTLX0 350KTLX0 330KTLX1 333KTLX1 350KTLX1 Rated output 250kW 330kW 333kW 352kW 330kW 333kW 352kW power Maximum 250kVA@50°C 330kVA@35°C/ 333kVA@40°C /...

  • Page 99: Performance Parameter

    Technical Data 10 .3 10 .3 Performance Parameter Performance Parameter SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 250KTLX0 330KTLX0 333KTLX0 350KTLX0 330KTLX1 333KTLX1 350KTLX1 Max efficiency 99.05% European 98.80% Weighted efficiency MPPT >99.9% efficiency EN 61000-6-2, EN 61000-6-4 Safety...

  • Page 100: General Data

    Technical Data 10 .4 10 .4 General Data General Data SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR SOFAR Model 250KTLX0 330KTLX0 333KTLX0 350KTLX0 330KTLX1 333KTLX1 350KTLX1 Topology Transformless Ambient -30°C ~ +60°C temperature range Relative 0% ~ 100% humidity DC Switch...

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