Weco TK Series User Manual

Hybrid inverter

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TK SERIES

TK 4-20K Hybrid Inverter User Manual

For Europe market

400Vac

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Summary of Contents for Weco TK Series

Page 1 TK SERIES TK 4-20K Hybrid Inverter User Manual For Europe market 400Vac...
Page 2 TK series inverters. Please read this manual carefully before installation and operation to understand the safety information and to familiarise yourself with the functions and features of the TK series inverters. Personnel requirements All details in the manual, instructions for installation, operation, maintenance and troubleshooting are intended for authorised installers.
Page 3 - Avoid touching electrical parts or internal components of the inverter without first checking for voltage with a voltage tester. - Disconnect and switch off the inverter when a persistent fault is present. - Report the fault immediately to a qualified technician or to WeCo. 2. Inspection and Maintenance: - Carry out periodic checks of the fans, connectors and surfaces to prevent dust accumulation and ensure proper system operation.
Page 4 ISTRUZIONI DI SICUREZZA E PRECAUZIONI GENERALI General Precautions: 1. LOTO (Lockout-Tagout): Always apply the LOTO procedure to ensure that the inverter is disconnected from all power sources during installation, maintenance or repair. Follow the following steps scrupulously: Identify all energy sources. Isolate the energy by physical disconnection.
Page 5 SCHEDULED MAINTENANCE PROCEDURES Scheduled activity to ensure the safety and reliability of the System: Before starting any activities, ensure that you have the appropriate safety measures in place as mandated by local regulations and your company’s safety supervisor. This includes having portable firefighting systems, such as CO2 and powder extinguishers, readily available. Additionally, verify that all personal protective equipment (PPE) and tools comply with your country's electrical codes and the safety procedure of your company Emergency and Safety Breakers...
Page 6 GENERAL PRECAUTIONS FOR USERS General Safety Precautions Security for End-Users to carry out maintenance and supervision procedures of their plant. General Precautions: Do Not Touch Damaged Parts: Do not operate or touch visibly damaged parts of the inverter or solar system. Immediately report any damage to a qualified technician.
Page 7 PLANNED ACTIVITY TO ENSURE THE SAFETY AND RELIABILITY OF THE BATTERY SYSTEM WITH HEAT PUMP CONDITIONER CABINET CONNECTED TO AN POWER CONVERSION SYSTEM Before starting any activities, ensure that you have the appropriate safety measures in place as mandated by local regulations and your company’s safety supervisor.
Page 8 alarms indicating communication issues between the batteries and the inverter. Ensure the BMS (Battery Management System) is properly communicating with the inverter, exchanging vital information such as state of charge (SoC), voltage, temperature, and current. Perform CAN Communication Test: Perform a communication test to ensure that the CAN bus is transmitting data correctly between the batteries and the inverter. Use diagnostic tools to verify the integrity of the data being transferred (e.g., using a CAN bus analyzer or other testing devices).
Page 9 SAFETY MANAGEMENT AND SUPERVISION OF LITHIUM BATTERY Lithium batteries, commonly used in solar energy storage systems, require specific precautions due to their potential risk of fire, explosion and toxic gas release. The following are additional safety measures and best practices for handling lithium batteries. Specific Risks of Lithium Batteries Risk of Overheating and Burning of Lithium Batteries due to Thermal Runaway.
Page 10 Table of Contents Overview ............................. Errore. Il segnalibro non è definito. Personnel requirement ........................Errore. Il segnalibro non è definito. Symbolic conventions ......................... Errore. Il segnalibro non è definito. Version Revision History ........................Errore. Il segnalibro non è definito. 1 Safety Instructions ........................... Errore. Il segnalibro non è definito. 1.1 General security considerations ..................
Page 11 7 Storage & Care ..........................Errore. Il segnalibro non è definito. 7.1 System Storage ........................Errore. Il segnalibro non è definito. 7.2 System Care ......................... Errore. Il segnalibro non è definito. 8 Inverter Disposal ..........................Errore. Il segnalibro non è definito. 8.1 Remove the inverter ......................
Page 12 • WECO is not responsible for the installation process or the selection of installers, who must be qualified according to local regulations. WECO assumes no responsibility for violations of general operational safety requirements or safety standards for the installation and use of the equipment.
Page 13 1.2 Statement Personnel capable of installation, cabling, commissioning, maintenance, troubleshooting and replacement must meet the following criteria: Operators must receive professional training from their employer before operating devices for the first time. Operators must read this manual in its entirety and master safety issues related to operation. Operators must be familiar with the relevant safety specifications of electrical installations.
Page 14 1.4 Electrical connections Danger! Before making any electrical connections, ensure that the inverter is undamaged and carry out installation only under safe conditions. Avoid installing the inverter where there is visible damage to prevent electric shock, fire and personal injury. Do not install the inverter if there is any damage to the inverter housing or metal casing.
Page 15 1.6 Maintenance and Replacement Danger! When using the inverter, be aware that the DC and AC inputs and outputs are "high voltage" and can cause electric shock, resulting in death, serious injury or property damage. Therefore, before performing any maintenance work, you must turn off the power, wait 15 minutes and work in strict accordance with the safety precautions listed in this manual and other relevant documents.
Page 16 2 Product Introduction 2.1 Product Introduction The inverter is a three-phase converter, capable of converting solar energy into alternating current or storing DC energy in the battery for use when needed. The user can use the app to flexibly choose the most advantageous operating mode according to the actual usage scenario, with different situations of PV, grid, battery, load and so on.
Page 17 2.3 Terminals of inverter Figure 2-3 Terminal Description DC switch DC switch for PV1 and PV2 DC Input terminal PV input port Battery input terminal Battery connector COM1 COM1 interface for WIFI module terminal COM2 COM2 interface for Meter/BMS/RS485/DRED/DO Connector AC input terminal Used for On-grid and Back up output cable connection LED Bar...
Page 18 2.4 System Topology For proper operation of the EPS load, make sure that the maximum load power of the EPS is within the limits of the inverter, otherwise the system will not be able to support the EPS in case of power failure and an overload alarm may occur. (Refer to the product data sheet).
Page 19 3 Pre-installation 3.1 Check the outer packaging Before unpacking the inverter, check the outer packaging for visible damage, such as holes, cracks, or other signs of possible damage inside, and check the inverter model. If the packaging has abnormalities or the inverter model does not match, do not open it and contact your dealer as soon as possible.
Page 20 3.3 Installation tools and gauges requirement Torque socket wrench (sleeve Torque wrench (opening size: Hammer drill (drill bit opening: 8mm, for M6 bolts; Torque 13mm; Torque range: Ф8mm). range: 0N•m~ 15N•m). 0N•m~1.5N•m). Torque screwdriver (head: M4, Wire strippers Diagonal pliers M6;...
Page 21 The inverter should be installed in a well-ventilated environment to ensure good heat dissipation. (Do not install the inverter outside without any weather protection/shielding. WeCo suggests that installation take place in dedicated technical rooms in order to maximize the safety and durability of the system.
Page 22 The switches below are recommended by WECO. For any other selection, please choose the cable according to local regulations. Relevant Cable & wires introduction The cables shown below are recommended by WECO but must still be validated by the design engineer in your electrical design. Choose the cable according to local standards and design specifications.
Page 23 4 Installation Before installing the TK series inverter, please read this manual carefully. Danger! Before making the electrical connection, make sure that all the switches of the inverter are in "OFF" state, otherwise the high voltage of the inverter may cause the risk of electric shock.
Page 24 4.2 Installation Steps ⚫ Step 1: Install the TK inverter on a wall. ⚫ Step 2: Connect the PE cable to TK inverter ⚫ Step 3: Connect the PV strings to TK inverter. ⚫ Step 4: Connect battery to TK inverter. ⚫...
Page 25 1. Make the OT terminal for “PE” cable. 2. Put on the heat shrink tube. 3. Fasten PE cable. Heat-shrinkable tube Heat-shrinkable tube PE Cables 5N∙M OT terminal Heat gun hydraulic Step 3: Connect the PV strings to TK inverter. Make the PV+ connector: (a) Strip the 7mm conductor of PV+ and insert the conductor into the Male Pin.
Page 26 Step 4: Connect the Battery to TK inverter. Make the BAT+ connector: (a) Strip the 10mm conductor of BAT+ and insert the conductor into the Male Pin. (b) Using a crimping tool to crimp the cable end of BAT+. (c) Put the BAT+ end to the BAT+ connector, and fasten the screw. a.
Page 27 (b) Insert one side of the RJ45 plug into the RJ45 port of terminal block. Note! Example with WECO Battery HV Box Communication RJ45 connector. If LAN cable need to be prepared onsite, refer to the cable definition in the following figure 4-1. The color order at both ends is different.
Page 28 Step 5: Connect the AC cables to TK inverter a. Strip the 8mm conductor of AC cables. b. Fasten the cable to the connector pins. c. Run the cable gland and fasten the nut. d. Plug in the AC connector. 50mm Allen Key Plug in...
Page 29 Step 6: Connect Meter to TK inverter The current Transformer, also called CT, is usually installed on the L wires between the house loads and the power grid. The Meter can be installed in the AC combiner box or other places that are unable to be touched by children. CT cable with length of 2m, it’s fixed and can’t be extended.
Page 30 Note! CT installation direction should strictly follow the instruction in the user manual, otherwise, the inverter may not be working normally.The CT has to be corresponding with the port in the meter, and the connection between CT and Meter needs to be reliable, otherwise, the CT measurement accuracy may be affected.
Page 31 5 System Commissioning 5.1 Power-up checklist Note! ⚫ Please check the following checklist before turning on the system for the first time; otherwise, the device may be dangerous or damaged. ⚫ Always consult local regulations, wear appropriate personal protective equipment during operations for your own safety. ⚫...
Page 32 5.2 System power up Prerequisites Before closing the AC switch between the inverter and the grid, it is necessary to measure whether the AC voltage on the grid side of the AC switch is within the range allowed by the inverter. Procedure Step 1: Turn on the inverter to activate the WiFi device and configure the inverter.
Page 33 c. Fill in the account and password and Click “Sign In”. Step 3: Add Plant on Noor APP a. Click “Add Plant”. b. Fill in the Plant info and Click “Save”.
Page 34 Step 4: Add Device on the Plant and config the WIFI module a. Click “Add Device”. b. Click the “Datalogger”. c. Scan the QR code of WIFI module or manual input WIFI module SN number and Click “Adding” to finish add device. d.
Page 35 Step 5: Inverter setting a. Click the icon and “Basic Setting” to enter the inverter basic setting page. b. Click the “Expert Setting” and input the password to enter the advanced setting page.
Page 36 5.4 Energize the system After finishing all the commission steps, installer can power on the inverter step by step. Step 1: If the inverter is connected to the battery, close the battery breaker first and then turn on the battery. Step 2: If there is a PV breaker between the inverter and the photovoltaic string, close the breaker.
Page 37 6 System Maintenance 6.1 Routine Maintenance In order to ensure that the inverter can operate well for a long time, it is recommended to maintain it routinely as described in this section. Caution! ⚫ Perform system power-down operations while performing maintenance such as system cleaning, electrical connections, grounding reliability, etc.
Page 38 6.2 Power down the system Warning! ⚫ After the inverter is powered down, there is still residual power and heat in the chassis, which may cause electric shock or burns. Therefore, after 15 minutes of powering down the inverter system, wear protective gloves before operating the inverter. ⚫...
Page 39 6.4 Troubleshooting The fault messages and their corresponding troubleshooting methods are listed below: Error/Fault Description Solution Message (1). Confirm whether the grid supply is lost. Grid power outage, AC switch or circuit is Grid Lost disconnected. (2). Check whether the AC breaker and terminal are well connected. (1).
Page 40 (1). Restart the inverter. AC Transducer Fault AC transducer got abnormal (2). If the problem persists, contact the installation company. (1). Use multimeter to measure the voltage between N&PE cable on AC side. If the voltage is higher than 10V, which means the neutral or Self-checking of internal relay got failed.
Page 41 Updating the firmware is critical to optimize inverter performance and warranty. Normally the WECO team updates the system remotely, so always keep the inverter online to avoid missing the update. During the upgrade, the system may operate in bypass mode (directly using mains power). Make sure the inverter is in normal condition and the Internet connection is stable, then press the update button in the NOOR application to start the system update.
Page 42 PV input lines, battery input lines, AC output lines, and protective grounding cables. Step 3: Remove the screws securing the inverter. Note: Please note that for any reason, personnel or installer should not disassemble/demolish the inverter without WECO's permission, otherwise the device will not be under warranty.
Page 43 Appendix A abbreviations Alternating Current Battery Direct Current Heat Pump Identifier Light Emitting Diode LVRT Low Voltage Ride-Through MPPT Maximum Power Point Tracking Personal Computer Protective Earthing Photovoltaic Residual Current Device Relative Humidity Smart Ready Serial Number THDI Total Harmonic Current Distortion WEEE Waste Electrical and Electronic Equipment WiFi...
Page 44 Appendix B Label Description Symbols on product icon name meaning Anti-scald The inverter has a high shell temperature when working, there is a risk of warning sign scalding, and it is strictly forbidden to touch it High voltage Solar inverter with high voltage input, do not hazard sign disconnect under load.
Page 45 Nameplate...
Page 46 Appendix D Working Mode & Light Language The TK inverter can be connected up to 8 PV strings, and each MPPT circuit can support 2 strings of solar panel. Device contains Maximum power point tracking, DC to AC conversion through inverter circuit, and surge protection function on both DC and AC side. The TK inverter can expand the energy storage function through the energy storage interface, and the energy generated by the PV string is supplied to the local load for use, and the excess energy is stored in the energy storage equipment.
Page 47 The LED Bar is described in the following table Equipment status Light language remarks Standby Blink light blue light for 6s once (3S lights on,3S lights off) The device is normal and operate under bypass, and APP remote shutdown does not work On-Grid Work Blink light, green light for 6s once (3S lights on, 3S lights off)
Page 48 When the grid fails, power from PV and battery will supply loads connected on the back-up side (UPS). In this working mode, you can set charge/dis- charge power and time in the App, inverter will use the power from PV or grid (whether to use can be set in the App) to charge the battery in the predetermined period.
Page 49 Appendix E SG ready Heat Pump Introduction Solution Introduction TK inverters have integrated the intelligent load management function, which can help customers to use their green power with their SG ready heat pump (HP) more efficiently. For better to use this function, we made this file to guide the connection and settings.
Page 50 Wire Connection Most SG ready HP has integrated the contact for receiving EVU signal. Different EVU signals corresponding to different SG Ready HP working modes. Here we use a common case as an example: Contact Status Work Mode1:OFF Mode2:Normal Mode3:Recommended ON Mode4:Forced ON : OFF;...
Page 51 COM2 Pins Definition Assembling the Inverter COM2 Function Connect the Cables to Inverter...
Page 52 Connect the cables to Heat Pump Find the EVU port in the HP connector, and connect the pilled wire into it. (If you can not find the relative connector, please consult the HP manufacturer.) Inverter configuration Note! Before the configuration, please check other cable (power cable and ground cable) is properly and reliably connected, and make sure the SG ready function of heat pump is activated.
Page 53 Step2: Smart Mode Setting By Grid Power Suitable for the system without power export limitation. By Battery SOC Suitable for the system with power export limitation.
Page 54 Base on Time Support up to 3 preset time periods.

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