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REFUSOL 20K-2T, Operating Manual

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REFUSOL 20K-2T Operating Manual Download Page 21

Technical Description

21

Communication Interfaces

REFUsol 20K...33K-2T
982079 | 05 | 2021-03

En

gl

is

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eu

ts

ch

Fig. 16: Pin assignment terminal connection digital inputs

Fig. 17: Pin assignment RJ45 for RS485 communication

6 mm 

IN1 IN2 IN3 IN4 GND

DRM0

1 2 3 4 5 6 7 8

6 mm 

Summary of Contents for 20K-2T

Page 1: ...Document No Issue 982079 05 Issue Date 2021 03 Operating manual Solar Inverter REFUsol 20K 2T REFUsol 33K 2T Product REFUsol 20K 33K 2T Language English English Deutsch...

Page 2: ...ent of the grant of a patent utility model or design Liability The data specified is only used to describe the product and should not be interpreted as warranted characte ristics in the legal sense Th...

Page 3: ...stems 9 3 Technical Description 10 3 1 Functionality of the Inverter 10 3 2 Cooling Concept 12 3 3 Connection Requirements 14 3 4 Compatible Grid Types 15 3 5 Components and Dimensions 16 3 6 Communic...

Page 4: ...trical Safety 46 5 2 Commissioning the Inverter 46 6 Operation 46 6 1 Operation Navigation and Key Functions 46 6 2 Main Menu v2 6 47 6 2 1 Main Menu 1 Enter Setting 47 6 2 2 Main Menu 2 Event List 51...

Page 5: ...on of Information To enable you to handle your product safely and quickly with these instructions uniform warnings symbols designations and abbreviations are used 1 3 1 Symbols The following symbols i...

Page 6: ...SIGNAL WORD WARNING CATEGORY Type and source of danger Consequences of ignoring the warnings Measures required to avoid the danger DANGER Leads directly to death or serious personal injury if ig nore...

Page 7: ...fore installing and using the product 2 2 Rules for Safe Installation and Operation Do not attempt to install or operate the product without proper training Ground the product properly Ground the meta...

Page 8: ...s may therefore only be carried out by an appropriate specialist or a trained person under the supervision of a specialist A skilled person is a person who on the basis of his professional training hi...

Page 9: ...en determined that it complies with country spe cific rules regulations safety regulations certifi cates and application regulations 2 8 Personal Protective Equipment REFU Elektronik GmbH recommends t...

Page 10: ...the input board These can be operated in parallel mode or in independent mode The input board provides extensive functions including insulation monitoring DC voltage and cur rent monitoring and revers...

Page 11: ...mmunication of the inverter with other IT devices PC smartphone and web portals Depending on the design of the PV system and the wiring of the individual PV modules the PV strings can be connected to...

Page 12: ...Technical Description 12 Cooling Concept REFUsol 20K 33K 2T 982079 05 2021 03 3 2 Cooling Concept Fig 4 Cooling of the inverter...

Page 13: ...MPPT input for 33K 2T 3 x PV MPPT input IN1 L1 L2 L3 N PE IN2 MPPT1 MPPT2 RCD ISO 1 ISO 2 DC input DC switch DC EMC filter DC DC booster DC AC inverter AC grid relais AC EMC filter AC output microSD c...

Page 14: ...tions for handling substances hazardous to water chemicals prohibi tion ordinance technical instructions for noise pro tection and regional building regulations The REFUsol 20K 33K 2T has 2 independen...

Page 15: ...et 3 4 Compatible Grid Types The REFUsol 20K 33K 2T are compatible with the TN S TN C TN C S and TT grid types When using the TT mains the voltage between the neutral conductor and earth should be les...

Page 16: ...face 5 RS485 and digital input cover 6 AC cover 7 Heat sink 20K 2T only 8 PV connection area IN2 MPPT2 9 DC positive connection 10 DC minus connection 10 7 IN1 IN2 9 1 2 3 4 5 6 8 1 Pressure compensat...

Page 17: ...33K 2T 982079 05 2021 03 English Deutsch Fig 9 Structure of the type code Fig 10 Dimensions front view 1 Housing cover 2 LED display with membrane keys and status LEDs Rated output power 20K 2T 33K 2...

Page 18: ...Technical Description 18 Components and Dimensions REFUsol 20K 33K 2T 982079 05 2021 03 Fig 11 Dimensions side view Fig 12 Dimensions rear view 1 Heat sink 2 Inverter bracket 245 mm 1 2 528 mm...

Page 19: ...mm 459 mm 336 mm 135 mm 135 mm 348 mm 10 mm 14 mm 9 mm 5 min Model No REFUsol 20K 2T 850P020 200 Max DC input voltage Operating input voltage range 1 000 V 230 960 V 24 A 30 A 3 N PE 230 400 V 32 A 50...

Page 20: ...2 Communication port WIFI GPRS ON OFF IN1 IN2 PE N IN1 IN2 IN3 IN4 GND DRM0 NC COM NO AC RS485 SD RELAY RS485 L1 L2 L3 WIFI GPRS IN1 IN2 IN3 IN4 GND DRM0 NC COM NO RS485 SD RELAY RS485 3 Tab 2 Communi...

Page 21: ...ication Interfaces REFUsol 20K 33K 2T 982079 05 2021 03 English Deutsch Fig 16 Pin assignment terminal connection digital inputs Fig 17 Pin assignment RJ45 for RS485 communication 6 mm IN1 IN2 IN3 IN4...

Page 22: ...to a PC 4 Ethernet or WiFi interface for data logging 3 7 Display and Operating Elements Fig 19 LCD display with keys and status LED PC 1 2 3 4 1 Ground fault detection 2 Normal operation On 3 Alarm f...

Page 23: ...el up One menu level down ESC Select or confirm the value Status LED Operating status Description GROUND FAULT red on GFI error ground fault de tected off no GFI error ON green flashing Waiting or tes...

Page 24: ...and menu display Fig 22 Performance data 1 Modbus address 2 RS485 interface active 3 Ethernet WiFi interface active 4 Activity on RS485 bus 4 2 3 1 1 Daily PV yield 2 Total PV yield 3 MPPT scan funct...

Page 25: ...3 a m to 9 p m 1 Lights up when DC voltage exceeds 250 V 2 Measuring channel MPPT1 MPPT2 IN1 IN2 3 DC voltage and currentper measuring channel changes every three sec onds 4 Lights up in feed in opera...

Page 26: ...e inverter switch es to the temporary or permanent error state In this operating state the inverter waits for the next initialisation step Check Check The inverter checks the insulation resistance of...

Page 27: ...and is in the operating state tempo rary error state As soon as the error no longer exists the inverter automatically returns to the operating state Normal If the error condition still exists check t...

Page 28: ...ar inverter successful COM LED lights up for approx 5 s Server connection successful SER LED flashes quickly and NET LED lights up for approx 7 s Start of normal operation LED Communication Status Des...

Page 29: ...sful Flashing interval 1 s Connection to router successful Flashing interval 100 ms Quick setting network active Off Connection to router faile COM Solar inverter On Logger is connected to the solar i...

Page 30: ...REFUsol 20K 33K 2T 982079 05 2021 03 3 9 Efficiency and Power Diagrams Fig 27 Efficiency diagram Fig 28 DC voltage power diagram Fig 29 AC voltage power diagram Efficiency Rated output power AC output...

Page 31: ...ool Cable cutter Crimping tool s DANGER High voltage Danger to life due to high voltages in the live components of the inverter which can cause fa tal electric shocks All work on the product must be c...

Page 32: ...for damage If damage is found do not unpack the inverter and contact the supplier immediately 2 Check the scope of delivery If the scope of delivery is incomplete or damage is detected contact the su...

Page 33: ...lation Site The following requirements must be met for the installation site Fig 30 Requirement for the installation site MC4 crimp contacts DC 4 6 MC4 crimp contacts DC 4 6 Hexagon socket screw M6 2...

Page 34: ...Installation 34 Requirements for the Installation Site REFUsol 20K 33K 2T 982079 05 2021 03 Fig 31 Vertical installation Fig 32 Distances and clearances max 15 80 cm 50 cm 50 cm 50 cm...

Page 35: ...ms are taken into account during planning 1 Position the inverter bracket align it with a spirit level and mark the drill holes 2 Drill holes according to the markings 3 Insert heavy duty anchors into...

Page 36: ...tions on the inverter 4 7 Mount Inverter 1 With two people align the inverter on the inverter bracket with the recesses and hook it in 2 To secure the inverter tighten the M6 hexagon socket screw on t...

Page 37: ...crew M5 The potential equalisation conductor with a cross section of 16 mm is prepared 1 Strip the potential equalisation conductor to a suit able length using a pair of wire strippers 2 Insert the ba...

Page 38: ...ross sections must be designed accordingly 1 Remove the AC cover with a Phillips screwdriver 2 Loosen the union nut and remove the blind plug of the cable gland 3 Strip the conductors of the AC cable...

Page 39: ...d Connecting DC Cables 4 10 1Assemble DC Cable The polarity of the DC cables are checked and marked The electrical system is secured and disconnected in accordance with the 5 safety rules 1 Strip 10 m...

Page 40: ...ectly assigned 5 Slightly loosen the union nut of the MC4 connectors 6 Push the crimped conductor into the MC4 connector until it audibly clicks into place 7 Tighten the union nut and check for tightn...

Page 41: ...erfe rence The length of the communication cable should be less than 1000 m 4 11 1Connect RS485 Communication 1 Remove the RS485 and digital input cover on the inverter 2 Slightly loosen the union nut...

Page 42: ...PG screw connection and cover 4 11 2Connect Digital Inputs IN1 to IN4 1 Remove the RS485 and digital input cover on the inverter 2 Slightly loosen the union nut of the PG screw con nection 3 Remove th...

Page 43: ...ction area with a Phillips screwdriver 2 Slightly loosen the cable gland of the Ethernet adapter 3 Plug the shielded RJ45 Ethernet cable into the Ethernet stick 4 Tighten the cable gland and check for...

Page 44: ...the Internet browser and enter the address 10 10 100 254 4 Enter user name admin and password admin The status page opens 5 Click the Wizard button to configure the settings of the WiFi stick If conf...

Page 45: ...og com with a browser and register as a new user 5 Commissioning 5 1 Testing the Electrical Safety Carry out initial commissioning test according to IEC 62446 1 5 2 Commissioning the Inverter 1 Switch...

Page 46: ...to confirm the selection After a successful setting change Success is shown in the menu display The default password is 0001 For the software update and ON OFF control the password is 0715 6 2 Main M...

Page 47: ...ontrol 6 Relay Command1 7 Enable Set Country 8 Set Total Energy input in kWh feed in limit 9 Set Modbus Address 10 Set Inputmode parallel or independent mode 11 Set Language 12 Set Start Parameter1 13...

Page 48: ...AR N4105 001 CEI 0 21 Italy 002 Australia 003 Spain RD1699 004 Turkey 005 Denmark 006 Greece Continent 007 Netherlands 008 Belgium 009 UK G59 010 China 011 France 012 Poland 013 Germany BDEW VDE AR N...

Page 49: ...ice to obtain a password for activation The activation password is only valid for 24 hours 8 Set Total Energy Limit the amount of energy fed into the grid The information is given in kWh 9 Set Modbus...

Page 50: ...Main Menu 2 Event List The event list stores events in real time with their specific ID numbers and time of occurrence in descending order 1 Press the ESC key and the key until the menu dis play shows...

Page 51: ...om en solar solutions 5 Unzip the firmware folder and copy the entire firm ware folder to the microSD card directory 6 Insert the microSD card into the microSD card slot of the unit 7 Select the Softw...

Page 52: ...solator The inverter starts up If necessary check the current software version under SystemInfo 3 SoftVersion 7 Error Messages and Trouble shooting If the inverter does not work properly or is in a fa...

Page 53: ...itted limits If the event still occurs check the AC supply to the inverter ID03 GridOFP The frequency of the AC power grid is too high The inverter automatically returns to normal operating status whe...

Page 54: ...D12 GFCIFault GFCI error If the insulation fault occurs frequently and lasts for a long time the insulation resist ance of the PV system must be checked possible causes of the fault could be defec tiv...

Page 55: ...ting is possible con tact REFU Service ID16 AcRmsOCP The AC current is too high ID17 HwADFaultI Grid Error in AC cur rent measure ment ID18 HwADFault DCI Error in DC cur rent measure ment ID19 HwADFau...

Page 56: ...inputs and on the display If no troubleshooting is possible contact REFU Service ID27 VbusUnbal ance DC bus voltage is unbalanced ID28 DciOCP DC current is too high Check if the MPPT mode parallel or...

Page 57: ...nt is too high Check that the PV strings are correctly assigned and connected at both MPPT inputs The maximum DC currents should be almost symmetrical at both inputs If no trou bleshooting is possible...

Page 58: ...r switch off the DC switch wait 5 minutes and switch on the DC switch again If no troubleshooting is possible contact REFU Service ID50 Consist entFault_F Grid Comparison of AC frequency read ings bet...

Page 59: ...ible contact REFU Service ID53 Spi CommLose SPI communica tion between the master DSP and the slave DSP is faulty ID54 Sci CommLose SCI communica tion between the master DSP and the slave DSP is fault...

Page 60: ...he solar radiation conditions and the ambient temperature at the inverter Check the proper function of the cooler dirt and the function of the fans ID58 OverTemp Fault_Boost The boost temp is too high...

Page 61: ...shooting is possible contact REFU Service ID66 Unrecover BusOVP DC bus voltage an error cannot be reset ID67 UnrecoverIa cRmsUnbal ance AC current is too high a fault can not be reset ID68 Unrecover I...

Page 62: ...nt The DC current is too high an error cannot be reset ID74 ID77 are internal faults of the inverter switch off the DC switch wait 5 minutes and switch on the DC switch again If no troubleshooting is...

Page 63: ...equency is too high The inverter automatically reduces the output power if the grid frequency is too high As soon as the grid frequency is back in the regular range derating is inactive again ID83 Rem...

Page 64: ...ernal fan is working properly If no troubleshooting is possible contact REFU Service ID87 ID89 Reserved ID90 Fan3 alarm The fan 3 reports an error Check acoustically and visually that the fan in quest...

Page 65: ...5 minutes and switch on the DC switch If no troubleshooting is possible contact REFU Service ID96 RTC clock chip anomaly The internal RTC clock is in error state ID97 Invalid Coun try The set country...

Page 66: ...ut by qualified electricians only Always disconnect the inverter before work ing on it and observe the five safety rules see chapter 2 9 Observe the discharge time of 5 minutes CAUTION Hot surfaces Ri...

Page 67: ...pack the inverter in the original carton or use an equivalent carton that is suitable for loads of more than 50 kg 8 3 Store Inverter Store inverters in a dry place with an ambient tem perature betwe...

Page 68: ...o 20K 2T 850P020 200 33K 2T 850P033 200 Max recommendedPV power 26 6 kWp 44 kWp Max input voltage 1 000 V Operating input voltage range 230 V 960 V Start up input voltage 250 V Rated input voltage 620...

Page 69: ...98 98 2 MPPT efficiency 99 9 Self consumption at night 1 W Feed in start power 45 W REFUsol Inverter Type Art No 20K 2T 850P020 200 33K 2T 850P033 200 REFUsol Inverter Type Art No 20K 2T 850P020 200 3...

Page 70: ...ting Topology Transformerless Type of protection IEC 60529 IP65 Permissible range of relative humidity 0 100 Max installation height 2 000 m above sea level Noise level 30 dBA 45 dBA Cooling Natural c...

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Page 72: ...tion is prohibited Offenders will be held liable for the payment of damages All rights reserved in the event of the grant of a patent utility model or design The data specified is only used to describ...

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