REFUSOL 350K-8T User Manual

Photovoltaic string inverter

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Summary of Contents for REFUSOL 350K-8T

  • Page 2: Table Of Contents

    Contents Basic Safety Information Requirement for Installation and Maintenance Symbols and Signs Product Characteristics Intended Use Function Description PID Function SVG Function Reactive Power Regulation Other Function Modules Circuit Diagram DC Switch Descriptions Inverter Storage Installation Installation Process Checking Before Installation Tools Determining the Installation Position Moving of Inverter...
  • Page 3 Electrical Connection Electrical Connection Terminal Connector Grounding Connection (PE) Connect Grid Side of Inverter (AC-Output) Connect the Power Cord of the Tracking System (optional) Connect PV Side of Inverter (DC-Input) Recommended Wiring Methods Communication Connection Commissioning of Inverter Check Before Power-On Start Inverter Monitoring Operational Interface...
  • Page 4 10.2 Output Parameter (AC) 10.3 Performance Parameter 10.4 General Data...
  • Page 5: Basic Safety Information

    Requirement for Installation and Maintenance Installation of REFUSOL 330~350K series on-grid inverter must conform with laws, regulations, codes and standards applicable in the jurisdiction. Before installing and adjusting the produce, please read all of instructions, cautions and warnings in this manual.
  • Page 6: Qualified Person

    GmbH does not take any responsibility for the property destruction and personal injury because of any incorrect use. Label and Symbols REFUSOL 330~350K 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 7: Installation Location Requirement

    If you find any packing problems that may cause the damage of inverter or any visible damage, please notice the responsible transportation company immediately. You can ask your installer or REFUsol for help if necessary. Electrical Connection Please comply with all the current electrical regulations about accident prevention in dealing with the current inverter.
  • Page 8: Operation

    Attention to any electrical relevant instruction and Danger document. Enclosure or internal components may get hot during operation. Do not touch hot surface or wear insulated gloves. Attention Keep it away from kids! Maintenance and repair REFUsol 330/350K-8T...
  • Page 9 Inverter should not work again until removing all faults. If any repair work is required, please contact local authorized service centre. Should not open the inverter cover without authorized permit, REFUsol does not take any responsibility for that. Attention EMC/Noise Level Electromagnetic compatibility (EMC) refers to that on electrical...
  • Page 10: Symbols And Signs

    Attention Ensure the maximum DC voltage input is less than the maximum inverter voltage (including temperature condition). damage cause overvoltage, REFUsol will not take the responsibility Warning including warranty. Signs on the Product and on the Type Label REFUsol 330/350K-8T...
  • Page 11 REFUSOL 330~350K series has some safety symbols on the inverter. Please read and fully understand the content of the symbols before installation. Symbols Name Explanation After disconnect with the DC side, This is a residual there is a residual voltage in the...
  • Page 12 RCM logo requirements of the applicable Australian standards. Do not dispose of the equipment with household garbage at its end of life. WEEE designation Dispose of it according to local laws and regulations or send it to the manufacturer. REFUsol 330/350K-8T...
  • Page 13: Product Characteristics

    Circuit Topology Diagram The main inverter circuit topology diagram is presented. DC SWITCH DC Switch Description Describes the operation of the REFU 350K-8T inverter DC switch. Intended Use REFUSOL 330~350K series is a transformerless on grid PV inverter, that converters the direct current of the PV array to the grid- compliant, three-phase current and feeds into the utility grid.
  • Page 14 Any damage or property loss due to any use of the product other than described in this section, REFUsol will not take the responsibility. DC input of the product must be PV module, other source such like DC sources, batteries will against the warranty condition and REFUsol will not take the responsibility.
  • Page 15 Figure 2-2 Product front view and left view dimensions Figure 3-3 Product back view and bracket dimensions REFUsol 330/350K-8T...
  • Page 16: Function Description

    Board provides the auxiliary power, controls the operation state of inverter and shows the operation status by Display Board. Display Board displays fault code when inverter is abnormal operation conditions. At the same time, Control Board can trigger the replay to protect the internal components. REFUsol 330/350K-8T...
  • Page 17: Pid Function

    • Before turning on the PID repair function, you need to calibrate the working time of the inverter, and the PID defaults to work from 0:00 to 4:00. REFUsol 330/350K-8T...
  • Page 18: Svg Function

    The nighttime SVG function of the inverter operates under the cond ition of no input voltage, firstly, it needs to enable both the "real- time reactive power control enable bit" and the "SVG enable bit", an REFUsol 330/350K-8T...
  • Page 19: Reactive Power Regulation

    "Night SVG mode", and the desired reactive po wer output can be controlled through the APP, while the inverter st ays in the "Night SVG mode" mode. Currently, the REFUSOL 330~350K supports SVG settings in the range of ±30% of rated power.
  • Page 20 The shaded part of the figure below shows the reactive power calculated from the fixed power factor and active power: Reactive mode 2: reactive power regulation through fixed reactive power percentage REFUsol 330/350K-8T...
  • Page 21 For example, the rated active power of REFUsol 350K-8T is 352KW. If the reactive power percentage is set to 40%, the reactive power output is 352 * 40%= 140.8kvar.
  • Page 22 Sgn(Cosφ)_P1 Cos φ (P)Symbol of the power factor leading angle at point p1 on the mode curve Sgn(Cosφ)_P2 Cos φ (P)Symbol of the power factor leading angle at point p2 on the mode curve REFUsol 330/350K-8T...
  • Page 23 The reactive power is adjusted by setting the high-voltage starting point, high-voltage ending point, low-voltage starting point and low-voltage ending point of the grid voltage, in which the grid voltage changes continuously. The following figure shows the relationship between reactive power and grid voltage: REFUsol 330/350K-8T...
  • Page 24 When the grid voltage percentage is greater than the lockinv voltage percentage, this mode is normally enabled; When the grid voltage percentage is less than the lockoutv voltage percentage, the reactive power is 0. (response waiting time during REFUsol 330/350K-8T...
  • Page 25 The following figure shows the relationship between reactive power and grid voltage: Parameter Explain Range REFUsol 330/350K-8T...
  • Page 26 That is, when the active power does not reach the rated value, the reactive power is calculated according to the rated apparent power, and the calculation formula is ; When the active power �� = √�� − �� REFUsol 330/350K-8T...
  • Page 27: Other Function Modules

    Inverter or a group of inverters can be monitored remotely through an advanced communication system based on RS485 interface or PBUS communication. E. Software update USB interface for uploading the firmware, remotely uploading is available. F. AFCI (optional function) REFUsol 330/350K-8T...
  • Page 28 This function can detect whether there is a fault arc at the input end of the inverter. When an arc occurs, the inverter stops grid connection and gives an alarm reminder, to build a safe barrier for the whole system. REFUsol 330/350K-8T...
  • Page 29: Circuit Diagram

    PV n- Relay Switch Figure 2-5 Circuit Diagram REFUSOL 330~350K series utilizes multiple MPPT trackers to uesd to ensure a maximum power from PV arrays at different PV input conditions. DC Switches can safely disconnect the PV input when necessary to ensure the safe operation of the inverter and the safety of personnel.
  • Page 30: Dc Switch Descriptions

    Please check the type of fault through the “REFU SETTING” APP first, wait at least 3min after troubleshooting, and operate under the guidance of the technical support staff. DC SWITCH BREAKING: ⚫ DC SWITCH carries out automatic breaking and de-coupling in REFUsol 330/350K-8T...
  • Page 31 The FAULT indicator light is always on, and all four DC switches are automatically disconnected. Please contact the company's technical support staff after the switches are disconnected, and do not close the DC switches by yourself. REFUsol 330/350K-8T...
  • Page 32: Inverter Storage

    The maximum stacking layer number cannot exceed 4 layers. ⚫ If the inverter be storage for more than half years, the inverter ⚫ needs to be fully examined and tested by qualified service or technical personnel before using. REFUsol 330/350K-8T...
  • Page 33: Installation

    Caution Consider the weight of this product when doing transport and moving. Choose an appropriate mounting position and surface. Attention At least four persons for installation. Installation Process REFUsol 330/350K-8T...
  • Page 34: Checking Before Installation

    Table 4-1Components and mechanical parts that inside the package Pictures Description Quantity REFUSOL 330~350K series 1 pcs Rear Panel 1 pcs REFUsol 330/350K-8T...
  • Page 35 PV+ input connector 32 pcs PV- input connector 32 pcs PV+ metal pin 32 pcs PV- metal pin 32 pcs M12*50 Hexagon screws 4 pcs REFUsol 330/350K-8T...
  • Page 36: Tools

    M6*16 Hexa-gon 4.3 Tools Installation tools include, but are not limited to, those recommende d below. Other auxiliary tools may be used in the field if necessary.P repare tools required for installation and electrical connection as following table: REFUsol 330/350K-8T...
  • Page 37 AC power cable Screwdriver Use to remove AC connectors from the product Removal Tool Remove PV Connector Wire Stripper Used to peel cable With an open Used to tighten expansion end of larger bolts than or REFUsol 330/350K-8T...
  • Page 38 Torque Connect AC connector wrench Use to crimp cable on grid Crimping side, load side and CT Tool extensive cable Check grounding cable, Multimeter PV positive and negative pole Marker Mark signs Measuring Measure distance Tape REFUsol 330/350K-8T...
  • Page 39: Determining The Installation Position

    The inverter has an IP66 protection rating and can be used for ⚫ indoor or outdoor installation. Avoiding the inverter from direct sunlight, direct rain and snow ⚫ will prolong the life of the inverter. It is recommended to choose a sheltered installation location or build an awning. REFUsol 330/350K-8T...
  • Page 40 It is necessary to select a location for mounting the inverter that has sufficient load- bearing capacity to ensure that the inverter can work properly and efficiently. When selecting a mounting location, consider the followi ng requirements: REFUsol 330/350K-8T...
  • Page 41 REFUsol 330/350K-8T...
  • Page 42 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 isola te the inverters from the incoming and outgoing air. Figure 4-2 a) Recommended Installation REFUsol 330/350K-8T...
  • Page 43 Figure 4-3 b) Unrecommended Installation Method Figure 4-3 Clearance for multiple inverters Note: Other requirement for install position: Install position should obstruct the disconnect of power. ⚫ Place inverter in an appropriate bearing capacity objects. Location should be avoid touch by children. ⚫ REFUsol 330/350K-8T...
  • Page 44: Moving Of Inverter

    When place inverter on the floor, put it above foam or paper to avoid the damage of the shell of inverter. Attention Use auxiliary handle inside the package for moving REFUsol 330/350K-8T...
  • Page 45: Lifting Equipment

    (Note: M12 rings need self-preparation). Figure 4-6 Installation of Rings Fastened and tied the rope through two rings. Lifting inverter 50 mm above ground by using lifting equipment, check the tightening device of the hoisting ring and rope. REFUsol 330/350K-8T...
  • Page 46: Installation

    4.6 Installation Always make sure the inverter is free of any electrical connections before installing the inverter. Before drilling, make sure that you avoid any utility alignments in the wall to avoid any hazards! REFUsol 330/350K-8T...
  • Page 47 Step 2: Insert the expansion bolt vertically into the hole. (Recommended Specifications: M10*90) Figure 4-9 Screws into the holes Step 3: Align the rear panel with the hole positions, fix the rear panels on the wall by tightening the expansion bolt with the nuts. REFUsol 330/350K-8T...
  • Page 48: Bracket Installation

    M6 screw (accessories). Figure 4-11 Fix inverter 4.6.2 Bracket Installation: Step1: Use wall mount bracket, ensure the pole position are in same level by using level rule and take a mark with maker. REFUsol 330/350K-8T...
  • Page 49 Figure 4-12 Ensure hole position Step 2: Drilling hole by using Hammer Drill, recommend to do a stain proofing. Figure 4-13 Drilling holes Step 3: Use M12 screw and M12 flat washer to secure the wall bracket. Figure 4-14 Fix wall bracket REFUsol 330/350K-8T...
  • Page 50 Step 4: 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. Figure 5-15 Installation position of auxiliary handle REFUsol 330/350K-8T...
  • Page 51: Electrical Connection

    PV arrays will produce dangerous voltage if it is exposure under sun. Do not close the AC/DC circuit breaker before completing Danger the electrical connection and prevent misconnection. For this product, the open circuit voltage of PV strings should not greater 1500V. REFUsol 330/350K-8T...
  • Page 52: Electrical Connection

    The cables used in the PV system must be firmly Note connected, undamaged, well insulated and of the appropriate size. Electrical Connection Figure 5-1 Flowchart for connecting cables to the inverter 5.2 Terminal Connector Connector description as below: REFUsol 330/350K-8T...
  • Page 53 *Note: Lock the screw to limit the torque of the DC switch, making it impossible to twist the DC switch from OFF to ON, or ON to OFF.Remove the screw before turning the DC switch from OFF to ON or ON to OFF. REFUsol 330/350K-8T...
  • Page 54: Grounding Connection (Pe)

    5.3 Grounding Connection (PE) Connect the inverter to the grounding electrode usingground cable REFUSOL 330~350K series is a transformerless inverter which requires the positive pole and negative pole of the PV array are NOT grounded. Otherwise, it will cause inverter failure. In the PV system, all non-current-carrying...
  • Page 55 Note 2: The cavity formed after crimping the conductor crimp strip shall wrap the core wires completely. The core wires shall contact the terminal closely. Step 3: Remove the screw from the bottom side of inverter (Shown as figure 5-4), connect the grounding cable to the grounding point REFUsol 330/350K-8T...
  • Page 56: Connect Grid Side Of Inverter (Ac-Output)

    Inverter has a standard and integrated residual current monitoring unit (RCMU), when inverter detected leakage current excess 300mA, it will cut off with utility grid for protection. For external Residual Current Device (RCD), the rated residual current shall be 300mA or higher. Precondition: REFUsol 330/350K-8T...
  • Page 57 Otherwise, should not open the wiring box. Please do not keep unused screw in the wiring box. ⚫ Use M6 driver to unscrew the two screws on the wiring box,open wiring box cover. Figure 5-5 Open wiring box REFUsol 330/350K-8T...
  • Page 58 When use copper core cable, please use copper terminal ⚫ connector. When use copper clad aluminum cable, please use copper ⚫ terminal connector. When use aluminum core cable, please use Copper and ⚫ aluminum transition terminal connector or aluminum terminal connector. REFUsol 330/350K-8T...
  • Page 59 Figure 5-7 AC Terminal size REFUsol 330/350K-8T...
  • Page 60: Wiring Procedure

    (L1, cable: outdoor cables, M12 150–400 OT/DT terminals (L1, mm² L2, and L3), and M10 Sp ≥ S/2 OT/DT terminals (PE) recommended. You need REFUsol 330/350K-8T...
  • Page 61 IEC 60364-5-54 Step1: Open the cover, refers to section 5.4.1. Step 2: Turn OFF the AC circuit breaker and secure against reconnection. Step 3: Unscrew the nut of the AC terminal block and select the REFUsol 330/350K-8T...
  • Page 62 Step 5: Crimp the terminal. Step 6: Depending on the grid configuration, connect L1, L2, L3 and N to the terminals according to the label and tighten the screw on the terminal using a screwdriver. REFUsol 330/350K-8T...
  • Page 63 Multi-core wire wiring diagram: Single core wire wiring diagram: Select single-core wire, before wiring, you need to replace the already installed in the machine plugs with the single-core over- wire plugs supplied with the shipment. Note: REFUsol 330/350K-8T...
  • Page 64 The terminal box grounding point is mainly used to connect the multi-core AC line contains the ground wire; ground wire diameter size as table 5-1 described in the requirements. REFUsol 330/350K-8T...
  • Page 65 7. After wiring is completed, the cables should not be pressed against the inter-phase baffle and should not be cross-wound. Attention: Inverter protective grounding is recommended to prioritize the chassis enclosure grounding point. The chassis grounding point is REFUsol 330/350K-8T...
  • Page 66 Ensure that the AC output cables are tightly connected, otherwise the equipment may not operate, or the inverter terminal block may be damaged due to heat generated by the unreliable connection, etc. Damage caused by this will not be covered by the warranty of the equipment; REFUsol 330/350K-8T...
  • Page 67: Connect The Power Cord Of The Tracking System (Optional)

    ≤ 2.5m. The power line of the tracking system must be connected ⚫ before the AC output line, otherwise it will cause rework. The tracking power cord needs to be provided by the user, and ⚫ REFUsol 330/350K-8T...
  • Page 68 OT terminal and press it tightly with a crimping pliers. Step 3: thread the fabricated cable into the waterproof joint; Step 4: connect the cable with the corresponding terminal, tighten the nut and fix the terminal. REFUsol 330/350K-8T...
  • Page 69: Connect Pv Side Of Inverter (Dc-Input)

    Table 5-2 Recommend DC cable size ) Copper cable cross section area(mm Cable OD(mm) Range Recommend 4.0~6.0 4.5~7.8 Step1: Find the metal contact pins in the accessories bag, connect the cable according below diagram (1. Positive cable, 2. negative REFUsol 330/350K-8T...
  • Page 70 Step3: 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). REFUsol 330/350K-8T...
  • Page 71 Step 4: 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. Figure 5-9DC cable connection REFUsol 330/350K-8T...
  • Page 72 Dealing:If need to remove the PV connector from inverter side, please use the Removal Tool as below diagram, move the connector gently. Before, moving the positive and negative connector, please make sure “DC Switch” is on OFF position. NOTE REFUsol 330/350K-8T...
  • Page 73: Recommended Wiring Methods

    MPPT is controlled at 60A, and the maximum current of each branch of MPPT is 20A. For example, when the number of input strings is 20 to 31, the recommended connection of DC input terminals is as follows. Strings Strings Terminal Selection numbe Terminal Selection number REFUsol 330/350K-8T...
  • Page 74 MPPT1/MPPT3/MPPT5/ MPPT5/MPPT7/MPPT8 MPPT7 are connected connected strings strings respectively, respectively, MPPT4/MPPT6 MPPT2/MPPT4/MPPT6 connected to 2 strings /MPPT8 are connected respectively. strings respectively. MPPT1/MPPT2/MPPT3/ MPPT1/MPPT3/MPPT5/ MPPT4/MPPT5/MPPT7/ MPPT7/MPPT8 MPPT8 are connected to connected to 4 strings 3 strings respectively, respectively, REFUsol 330/350K-8T...
  • Page 75: Communication Connection

    3 strings strings respectively, respectively, MPPT6 are connected strings respectively. 5.8 Communication Connection Note:When layout the wiring diagram, please separate the communication wiring and power wiring in case the signal be affected. 5.8.1 USB/Ethernet Port Port Description: REFUsol 330/350K-8T...
  • Page 76 PC terminal or local data acquisition device, then uploaded to the server. Register remote monitoring of REFUSOL 330~350K series at its relevant website or APP according to monitoring device SN.
  • Page 77 Function Note RS485A RS485 signal+ Wire connection RS485A RS485 signal+ monitoring multiple RS485B RS485 signal- inverter RS485B RS485 signal- monitoring Electric meter Electric meter RS485 Wire RS485A signal+ connection Electric meter Electric meter Electric meter RS485 signal- RS485B REFUsol 330/350K-8T...
  • Page 78 The inverter will detect and initiate a response to all supported demand response commands within 2 s. The inverter will continue to respond while the mode remains asserted. Table 4-3 Function description of the DRMs terminal Function DRM1/5 REFUsol 330/350K-8T...
  • Page 79 Figure 5-12 Inverter – RRCR Connection Table 5-13 Function description of the terminal Pin NO. Description Connected to (RRCR) name Relay contact K1 - Relay 1 output input REFUsol 330/350K-8T...
  • Page 80 Figure 5-13 Picture of the RS485/USB converter and PC terminal If only one REFUSOL 330~350K 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 81 Figure 5-14 A single REFUSOL 330~350K series connecting communications. The length of the RS485 communication cable should be ⚫ less than 1000 m. Note REFUsol 330/350K-8T...
  • Page 82 5.8.3 PLC COMMUNICATION(Multi inverter monitoring system) Figure 5-15 Multi inverter monitoring system PLC Technical parameters of communication module: Technical Index Parameter Input power 24VDC Input Current 0.25ADC REFUsol 330/350K-8T...
  • Page 83 Soil buried wiring: if the cable line is wired by burying under the soil, the PLC communication distance can reach a maximum of 1000 meters. Tin roof plus trunking wiring: if the cable is laid on the tin roof REFUsol 330/350K-8T...
  • Page 84 PLC communication distance is controlled below 500 meters. REFUsol 330/350K-8T...
  • Page 85: Commissioning Of Inverter

    6. Commissioning of Inverter Outlines this Chapter Introduce REFUSOL 330~350K series safety inspection and start processing. Check Before Power-On Before starting up the equipment for the first time (test run), all operations performed on the equipment should be thoroughly checked. In particular, check that the DC terminal voltage and the AC terminal voltage are in accordance with the range permitted by the inverter.
  • Page 86: Start Inverter

    (the inverter is in grid connection), otherwise the inverter may be damaged due to lack of insulation impedance test. Attention If all of the above items are in order, perform the following steps to start the inverter for the first time. REFUsol 330/350K-8T...
  • Page 87 If you do not see the POWER lamp is always on/ALARM lamp is always on within 3 minutes, it means that the first set of string PV+ and PV- are connected incorrectly. Disconnect the DC SWITCH1 switch, re-exchange the PV+ and PV- access, and REFUsol 330/350K-8T...
  • Page 88 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. REFUsol 330/350K-8T...
  • Page 89 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. REFUsol 330/350K-8T...
  • Page 90 FAULT light is on or there are other defects, disconnect all switches and contact the technical support engineer in time. If the inverter is faulty, please refer to section 9.3 of this manual for one by one troubleshooting. REFUsol 330/350K-8T...
  • Page 91: Monitoring

    7. Monitoring Note: - Please refer to the extended instructions related to Monitoring, commissioning, and software upgrade via REFU App. REFUsol 330/350K-8T...
  • Page 92: Operational Interface

    8. Operational Interface About This Chapter This section describes the REFUsol 350K-8T display, operation, and LED indicators. Indicator Lights: Green light (POWER) on = Normal: Always on; In upgrading: fast flashing (on for 200ms/off for 200ms); In detection: slow flash (200ms on/ 1s off).
  • Page 93: Troubleshooting And Maintenance

    Step 2: If the inverter is not fault shutdown, set the remote shutdow n through the machine display, or send the shutdown command in REFUsol 330/350K-8T...
  • Page 94 2. When the inverter appears non- smoking and other special abnormal faults, please contact the after sales personnel in time for consultation to assist in troubleshooting, in the process of restarting the inverter, avoid standing in front of th e inverter. REFUsol 330/350K-8T...
  • Page 95: Troubleshooting Site Information

    The process to check the event list can refers to REFU Monitor APP. Table 9-1 Even list Code Name Description Solution ID001 GridOVP The grid voltage If the alarm occurs occasionally, REFUsol 330/350K-8T...
  • Page 96 Charge Leakage ID005 GFCI Check for inverter and wiring. Fault OVRT OVRT function If the alarm occurs occasionally, ID006 fault is faulty the possible cause is that the REFUsol 330/350K-8T...
  • Page 97 VGridUnb Grid voltage ID014 protection points after obtaining alance imbalance approval from the local electrical Power grid grid operator. HwADFau ID017 current ltIGrid sampling error Wrong HwADFau sampling of dc ID018 ltDCI component of grid current REFUsol 330/350K-8T...
  • Page 98 ID021 ceFault(D sampling error(DC) GFCIDevi Leakage current ID022 ceFault(A sampling error(AC) Load voltage HwADFau ID023 DC component ltDCV sampling error Dc input HwADFau ID024 current ltIdc sampling error HwADErr DCI Sampling ID025 DCI(DC) Error (DC) HwADErrI ID026 dcBranch REFUsol 330/350K-8T...
  • Page 99 Grid voltage ID030 tFault_Vg consistency error Consisten DCI consistency ID031 tDCI error SpiComm ID033 communication Fault(DC) error (DC) SpiComm ID034 communication Fault(AC) error (AC) SChip_Fa ID035 Chip error (DC) MChip_Fa ID036 Chip error (AC) ID037 HwAuxPo Auxiliary power REFUsol 330/350K-8T...
  • Page 100 ID043 Ground fault ctFault grounding. ConfigErr Error setting ID044 input mode Check the input mode CTDiscon (parallel/independent mode) ID045 CT error nect Settings for the inverter. If not, change the input mode. ReversalC Input Reverse ID046 onnection Error REFUsol 330/350K-8T...
  • Page 101 ID054 t_HeatSin temperature nt temperature is below the invert protection er temperature limits TempFaul Radiator 6 ID055 t_HeatSin temperature protection Temperature TempDiff difference error ID056 ErrInv of inverter module Ambient TempFaul ID057 temperature 1 t_Env1 protection REFUsol 330/350K-8T...
  • Page 102 Module 5 TempFaul ID063 temperature t_Inv5 protection Module 6 TempFaul ID064 temperature t_Inv6 protection VbusRms Internal faults of inverter, switch Unbalanced bus ID065 Unbalanc OFF inverter, wait for 5 minutes, voltage RMS then switch ON inverter. Check REFUsol 330/350K-8T...
  • Page 103 RMS ID072 nverter, wait 5 minutes and turn o msOVP software n the inverter. Check if the proble overvoltage m is resolved. Inverter bus SwBusIns If not, please voltage ID073 tantOVP contact technical support instantaneous value software REFUsol 330/350K-8T...
  • Page 104 ID075 ID076 PVUVP undervoltage protection Dci overcurrent ID082 DciOCP protection Output SwOCPIn instantaneous ID083 stant current protection BuckBoost SwBuckB software ID084 oostOCP overcurrent protection Output effective SwAcRms ID085 value current protection PV overcurrent SwPvOCP ID086 software Instant protection REFUsol 330/350K-8T...
  • Page 105 Inverter bus IbalanceO ID090 balance current protection Software AC SwAcCBC ID091 Over Current Fault Protection SwAcCBC Software ID092 Fault current limited protection SwPvBran PV branch over ID093 chOCP current protection Inverter bus HwBusOV ID098 hardware overvoltage ID099 HwBuckB BuckBoosthard REFUsol 330/350K-8T...
  • Page 106 Overload ID112 Overload3 protection 3 Make sure the inverter is installed where there is no direct sunlight. Internal OverTem ID113 temperature is Please ensure that the inverter is pDerating too high. installed in a cool/well ventilated place. REFUsol 330/350K-8T...
  • Page 107 OFF inverter, wait for 5 minutes, ID130 overvoltage then switch ON inverter. Check failure whether the problem is solved. Permanent Bus If no, please contact technical PermHw hardware support. ID131 BusOVP overvoltage failure PermIpvU Permanent PV ID132 nbalance unbalance REFUsol 330/350K-8T...
  • Page 108 PermInvS Permanent INV ID136 tartFail start failure Input mode PermInCf setting error ID137 gError permanent failure Input PermDCO ID138 overcurrent CPInstant permanent fault Input hardware PermHw overcurrent ID139 DCOCP permanent failure PermRela Permanent ID140 yFail relay failure REFUsol 330/350K-8T...
  • Page 109 Fan 2fault inverter is running normally. Please check whether the fan 3 of ID171 FanFault3 Fan 3 fault inverter is running normally. Please check whether the fan 4 of ID172 FanFault4 Fan 4 fault inverter is running normally. REFUsol 330/350K-8T...
  • Page 110 Main DSP MDSPCo n the inverter. Check if the proble ID257 communication mmFault fault m is resolved. If not, Sub-DSP SDSPCo please contact technical support. ID258 communication mmFault fault AFCI1 AFCI1Com ID259 communication mFault fault ID260 AFCI2Co AFCI2 REFUsol 330/350K-8T...
  • Page 111 Check that the corresponding bra ID322 Warning_ trouble nch circuit terminals are firmly plu gged in and that the PV input ter AFCI1_Arc minals are not loose. PV3 DC arc ID323 Warning_ trouble PV4 DC arc AFCI1_Arc ID324 trouble Warning_ REFUsol 330/350K-8T...
  • Page 112: Maintenance

    OFF. Wait at least for 5 minutes before the 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. Heat sink cleaning  REFUsol 330/350K-8T...
  • Page 113 2. The surrounding area should not be affected by plants and grasses that affect the heat dissipation in front of the inverter, and REFUsol 330/350K-8T...
  • Page 114 Check whether sealing plug of the unused input terminal detached. Check that waterproof covers of the unused COM ports and USB ports are not locked. REFUsol 330/350K-8T...
  • Page 115 At least half a year/1 operation each indicator light time status check normal when equipment is running, and whether there is any fault alarm message control panel; Check whether parameters inverter operation are within the prescribed range, focusing REFUsol 330/350K-8T...
  • Page 116: Fan Replacement And Maintenance Instructions

    Before replacing the fan, it is necessary to perform a de- ⚫ energizing operation on the inverter. When replacing the fan, insulated tools must be used and ⚫ personal protective equipment must be worn. Step 1: Remove the fan bracket fixing screws and secure them. REFUsol 330/350K-8T...
  • Page 117 Note: You can't use brute force to pull out the terminals, you can us e your fingernail (tweezers or a small screwdriver are recommended ) to press the movable buckle, and then pull out the two ends. REFUsol 330/350K-8T...
  • Page 118 Step3:Remove the screws securing the fan bracket and pull the fan mounting bracket all the way out Step4:Cut off the tie- wraps of the defective fan (the outermost FAN 7 is used as an exam ple below, and the other fans work in the same way). REFUsol 330/350K-8T...
  • Page 119 Step5:Remove the defective fan and keep the removed screws in a safe place. Step 6: Lock the new fan in place. Step7:after the new fan is installed, tie the fan cable in the same pos ition as the original cable tie. REFUsol 330/350K-8T...
  • Page 120 CN22 CN27 CN26 CN29 CN28 port Fan6 Fan7 Correspondi failure failure failure failure failure failure fault FanFaul FanFaul FanFaul FanFaul FanFaul FanFaul code Step 10: Push the fan mounting bracket all the way in and tighten the screws. REFUsol 330/350K-8T...
  • Page 121: Fan Maintenance

    When replacing the fan, insulated tools must be used and personal protective equipment must be worn. Step 1: Unscrew the screws and remove the small baffles and keep t hem in a safe place. REFUsol 330/350K-8T...
  • Page 122 Step 2: Cut off the cable ties holding the fan cables and disconnect all the connecting terminals in turn. Step 3: Remove the screws securing the fan bracket and pull the fa n mounting bracket all the way out. REFUsol 330/350K-8T...
  • Page 123 Step 5: Push the cleaned fan bracket fully in against the mounting position and tighten the screws. Step 6: connect the connectors according to the color and fan seria l number. Step 7: put the small baffle back on and tighten the screws. REFUsol 330/350K-8T...
  • Page 124: Technical Data

    1160V Start-up voltage 550V 550V MPPT operating voltage 500~1500V 500~1500V range Full power MPPT voltage 860~1300V 860~1300V range Number of MPP trackers Number for DC inputs Max. input MPPT current 8*60A 8*60A Max. input short-circuit 8*100A 8*100A current REFUsol 330/350K-8T...
  • Page 125: Output Parameter (Ac)

    Nominal frequency 50Hz / 60Hz 50Hz / 60Hz Grid frequency range 45~55Hz / 55~ 65Hz 45~55Hz / 55~ 65Hz Active power adjustable 0~100% 0~100% range THDi <3% <3% 1 default 1 default Power factor (-0.8...+0.8 (-0.8...+0.8 adjustable) adjustable) REFUsol 330/350K-8T...
  • Page 126: Performance Parameter

    VDE-AR-N 4110/4120, CEI 0-16, UNE 217002, NTS 631, Grid standard EN50549, EN50530, IEC 62910 Leakage current/Anti-islanding /DC reverse Protection polarity/ZVRT/AC and DC secondary lightning protection Ground fault monitoring PV-array string fault monitoring Protection class Class I AC: III, PV: II Overvoltage REFUsol 330/350K-8T...
  • Page 127 Input/ output PV: type II standard, AC: type II Standard REFUsol 330/350K-8T...
  • Page 128: General Data

    Relative humidity 0% ~ 100% DC Switch Cooling Smart forced air cooling Max. operating 4000m altitude Communication RS485 / PBUS Display LED& Bluetooth +APP Degree IP66 protection Dimension 828×1159×366mm (H× W × D) <113 kg <113 kg Weight REFUsol 330/350K-8T...
  • Page 129 The data specified is only used to describe the product and should not be interpreted as warranted characteristics in the legal sense. The right to change the content of this documentation and the availability of the products are reserved. REFUsol 330/350K-8T...

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