Sungrow SG3125HV-20 System Manual Download

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Respect the following five rules in maintaining or servicing the inverter to ensure the

safety of the maintainer.

•

Disconnect the inverter from all the external connections and internal power supplies.

•

Ensure that the inverter will not be started inadvertently.

•

Verify that the inverter interior discharges completely with a multimeter.

•

Perform necessary ground and short circuit connection.

•

Cover the adjacent electrical components with insulation cloth during operation.

13.2 Maintenance

13.2.1 Introduction

The inverter can be installed outdoors. Harsh environmental condition or long-time

operation, however, may cause aging and damage to the inverter. Check and maintain

the inverter periodically and replace the aged components, which can effectively

prolong the service life and improve the performance of the devices inside the inverter.

Unscheduled maintenance is also required,esp.,when the system

performance is poor.

13.2.2 Maintenance Interval

Maintain the inverter and internal electric devices periodically to ensure the good

performance of the inverter.

The maintenance interval described in this chapter is indicative only. The actual interval

depends on the on-site environment condition. If the inverter is located in harsh

environment place, for example, desert areas, the maintenance interval shall be

shortened. Particularly, cleaning and anti-corrosion processing should be performed

more frequently.

If the inverter is installed in the desert areas, it is recommended to check the inverter

thoroughly and clean it carefully after sand storm.

Check the module fans inside the inverter and the fans on top of the cabinet

periodically for abnormal operation and abnormal noise due to dust penetration.

Stop the inverter and clean the dust if necessary.

Wait at least 10 minutes after the inverter discharge completely. Before

cleaning, make sure, with the multimeter, the inverter internal is discharged

completely to avoid electric shock.

13 Routine Maintenance

System Manual

Summary of Contents for SG3125HV-20

Page 1: ...ta at tiio on nS Sy ys st te em m M Ma an nu ua allS SG G3 31 12 25 5H HV V_ _3 34 40 00 0H HV V 2 20 0 S SE EN N V Ve er r1 11 12 2 2 20 02 20 00 07 7 SG3125HV_3400HV 20 SEN Ver112 202007 SG3125HV 20 SG3400HV 20 T Tu ur rn nk ke ey y S St ta at tiio on n S Sy ys st te em m M Ma an nu ua all ...

Page 2: ......

Page 3: ...Fault Protection 6 2 2 5 Live Line Measurement 6 2 2 6 Measuring Instrument 6 2 2 7 Volt free Operations 7 2 2 8 ESD Protection 7 2 2 9 LCD Parameter Setting 7 2 2 10 Sand and Moisture Protection 7 2 2 11 Symbols on the Device Body 7 2 2 12 Safety Warning Signs 8 2 2 13 Daily Operation and Maintenance 8 2 2 14 Disposal of Waste 8 2 2 15 Manual Description 9 3 Product Description 10 3 1 Overall Des...

Page 4: ...ation 26 5 3 1 Selection of Installation Site 26 5 3 2 Foundation Requirements 26 5 3 3 Recommended Foundation Construction Plan 27 5 3 4 Fixing the Inverter 28 5 3 5 Other Precautions 28 5 4 Clearance Requirement 29 5 5 Removing Sealing Tapes 29 6 Electrical Installation 30 6 1 Safety Instructions 30 6 1 1 Generals Rules 30 6 2 Preparation before Electrical Connections 32 6 2 1 Installation Tools...

Page 5: ... 2 2 Disconnecting the MV Transformer 50 7 2 3 Disconnecting the PV Combiner Box 50 7 3 Reconnecting the System 50 7 3 1 Reconnecting the MV Transformer 51 7 3 2 Reconnecting the PV Combiner Box 51 7 3 3 Reconnecting the Inverter 51 8 Commissioning 53 8 1 Safety Instructions 53 8 2 Requirements of Commissioning 54 8 3 Checking before Commissioning 54 8 3 1 Checking the Cable Connection 54 8 3 2 Ch...

Page 6: ... 65 10 5 2 Shortcut 65 10 6 Setting Date and Time 65 10 7 Checking Running Information 66 10 8 Checking History Information 66 10 8 1 Checking History Event 66 10 8 2 Checking History Data 67 10 8 3 Checking History Fault 67 10 8 4 Checking History Alarm 67 10 9 Checking Present Fault Information 67 10 10 Starting Stopping 68 10 11 Loading Default 68 10 12 Checking Firmware Version 69 10 13 Parame...

Page 7: ...requency Anomaly Protection 96 11 10 4 Islanding Protection 96 11 10 5 Overload Protection 97 11 10 6 Ground Protection 97 11 10 7 Module Over temperature Protection 97 11 10 8 Internal Over temperature Protection 97 12 Troubleshooting 98 12 1 Safety Instructions 98 12 2 Checking Fault 98 12 3 Fault and Troubleshooting on the Inverter 99 12 4 Other Fault and Troubleshooting 110 13 Routine Maintena...

Page 8: ...ecking the Sealing Strip 118 13 4 Painting Make up Measures 118 13 5 Replacing the Electrical Components 122 13 5 1 Safety Instructions 122 13 5 2 Replacing DC Fuses 122 14 Appendix 126 14 1 System Parameters 126 14 2 Tightening Torques 127 14 3 Exclusion of Liability 128 14 4 Contact Information 128 ...

Page 9: ...mmissioning Safety notices and commissioning process when the Turnkey Station is powered on for the first time Start Stop Steps of starting and stopping the Turnkey Station internal devices during normal maintenance or troubleshooting Operation on LCD Display Function and use of the Turnkey Station user interface Functions Descriptions of the Turnkey Station main functions Troubleshootin g Simple ...

Page 10: ...sioning Familiar with the country regional standards and specifications Familiar with this manual 1 4 Symbols Explanation This manual contains important safety and operational instructions that must be accurately understood and respected during the installation and maintenance of the equipment To ensure the optimum use of this manual note the following explanations of the symbols used DANGER indic...

Page 11: ...ing the inverter Documents must be stored at hand and available at all times All rights reserved including the pictures markings and symbols used Any reproduction or disclosure even partially of the contents of this manual is strictly forbidden without prior written authorization of Sungrow The contents of the manual will be periodically updated or revised due to the product development It is prob...

Page 12: ...r is shown in the following figure N No o N Na am me e A PV Array B PV Array Combiner Box C Inverter D Transformer E Utility Grid Installation of the inverter not in compliance with the description in this manual or installation or modification of the device without authorization from Sungrow may lead to personal injuries or device damages and may void pertinent warranty claims from Sungrow 2 2 Im...

Page 13: ... it is safe to do so All installations and operations on the inverter must be in full accordance with the national and local regulations and standards 2 2 2 Manual Storage Product manuals are an indispensable part of the product Important information about the transport installation maintenance and troubleshooting of the inverter is included in this manual All the descriptions in this manual espec...

Page 14: ...nd fault before performing operation and take proper protective measures 2 2 5 Live Line Measurement High voltages are present inside the device Death can result from burning and electric shock due to touching the live components of the inverter During live line measurement use suitable protective equipment for example dielectric gloves and accompanied by other persons 2 2 6 Measuring Instrument T...

Page 15: ... PCB Observe all the ESD related safety instructions Wear proper personal protective equipment PPE such as wrist strap 2 2 9 LCD Parameter Setting Some settable parameters on the LCD are closely related to the operations of the inverter and internal devices Thereforethese parameters can only be set with reliable evaluation of the system Improper parameter setting may impair the functionality of th...

Page 16: ...ersons are required until the operation is performed Proper field rescue facilities are required since most PV stations are installed in places far away from the urban areas Take the followings into consideration during daily operation and maintenance The nameplate is found on the inverter body It contains important parameter information of the devices Protect the nameplate during all operations H...

Page 17: ...a convenient place near the device for future reference during installation operation maintenance and troubleshooting of the device All the descriptions in this manual are based on the standard inverter and the actual product you receive may differ If necessary specify your requirements when placing the order This manual may not cover all possible situations Should a specific problem not explained...

Page 18: ...pped Left view Left of the inverter A pair of doors are equipped Right view Right side of the inverter C Co on nt tr ro oll a an nd d M Mo on niit to or riin ng g W Wiin nd do ow w The Control and Monitoring window is located on the front door of the inverter As shown in the figure below the LED indicators are at the upper part the color liquid crystal LCD touchscreen is at the middle part and the...

Page 19: ...tor will be off when the fault is cleared E EM ME ER RG GE EN NC CY Y S ST TO OP P B Bu ut tt to on n When an emergency occurs the DC and AC circuit breakers are disconnected automatically after pressing the emergency stop button After the fault is removed release the emergency stop button with the specific key and then manually start the inverter Start the inverter by referring to the 7 3 3 2 Res...

Page 20: ...tion Design The ventilation system is designed as the cool air is drawn from the bottom of the inverter and hot air is exhausted from the top of the inverter 3 2 Interior Design of the Inverter 3 2 1 Internal Components The figure below shows the top view of the major electrical components inside the inverter 3 Product Description System Manual ...

Page 21: ...n the inverter and the external devices are routed through the bottom of the inverter All cables coming into or out of the inverter should be protected properly for example using cable pipes to prevent damage from rodents After cable connection all cable entries except for cable glands should be sealed with fireproof mud or other appropriate materials The AC side cable entries may be located at th...

Page 22: ...4 Grounding cable entry Grounding cables come inside the inverter through this hole D Diim me en ns siio on ns s o of f t th he e H Ho olle es s u un niit t m mm m 3 2 2 2 AC Cable Entry on the Top The AC cable entry is on the upper right side of the inverter The function of each opening is shown below N No o N Na am me e N No ot te e 1 DC cable inlets DC cables are connected to the DC cabinet thr...

Page 23: ...he module cabinet the AC cabinet and the PMD The DC cabinet the AC cabinet and the PMD are all equipped with wiring terminals and operation switches D DC C C Ca ab biin ne et t f fiig gu ur re e 3 3 1 1 DC cabinet N No o N Na am me e D De es sc cr riip pt tiio on n A DC switches Control the connection disconnection on the DC side of the inverter B DC connection area The upper part of the copper ba...

Page 24: ... P PM MD D The ports between the inverter and external devices are designed on this cabinet The locations of the ports are shown in the following figure The above figure is for reference only and the actual product may differ N No o D De es sc cr riip pt tiio on n A RS485 ports B Ethernet port C Power distribution area 3 2 4 Operations on the DC and AC Side As shown in the following figure a DC sw...

Page 25: ...age state CHARGED SPRING or DISCHARGE SPRING The DC switch can be used together with a micro motor When there is the power supply on the AC side of the inverter the energy can be stored to the breaker through this motor When there is no power supply on the AC side of the inverter manually store the energy through the manual energy storage handle The operation steps are briefly described by taking ...

Page 26: ...SED Never manually connect the AC circuit breaker when the AC side carries voltage Switch off Press the Push OFF button on the breaker panel to switch off the breaker After the breaker is switched off the breaker panel displays OPEN 3 Product Description System Manual ...

Page 27: ...viic ce e Q Qu ua an nt tiit ty y N No ot te e A Inverter 1 B Enclosed documents 1 System manual delivery inspection report certification and warranty card C Door keys of inverter 1 Keys to monitor window 1 D Bolt 85 M16 55 12 M8 25 E Flat washer 170 φ16 F Spring washer 85 M16 G Nut 85 M16 12 M8 5 M6 H Washer 24 M8 10 M6 ...

Page 28: ... parameters and inverter related parameters are displayed on the nameplate Protect the nameplate at all times 4 3 Checking for Transport Damages The inverter has been strictly inspected and tested before delivery Despite robust packaging the container or internal devices may be damaged during transport Therefore once receiving the inverter perform a detailed inspection If any damage is found conta...

Page 29: ...utdoors elevate the inverter base according to the geological and ambient conditions When the ambient temperature is too low heat the inverter internal devices Temperature 40 C 70 C Relative humidity 0 95 and non condensation Store the inverter on a dry clean and solid ground with sufficient load bearing capacity The ground should be flat without water bumps or plantings Lock the inverter internal...

Page 30: ...ained beforehand The inverter must be transported by qualified personnel Qualified personnel are those who have been trained especially in safety operation Keep in mind the dimensions and total weight of the inverter at all times Ensure that the following requirements are met All the doors are locked Choose the appropriate crane or hoist to transport the inverter The crane or hoist must be suffici...

Page 31: ...nditions Observe the following items All safety requirements must be met A professional instructor is required in the whole hoisting process All the used slings must have the load bearing capacity of at least 10t The crane should have sufficient arm length and radius of gyration All the connection point must be firmly connected The length of the slings can be adjusted appropriately according to on...

Page 32: ...to check if all the connections are still firm After confirmation continue hoisting the inverter When transported to the final location the inverter should be put down slowly and steadily The final location should be firm level and well drained The inverter is supported by four bottom fittings on the ground The inverter should be hoisted by using four top corner fittings as shown in the following ...

Page 33: ...erter The lifting devices should be correctly connected to the inverter L Liif ft tiin ng g d de ev viic ce e H Ho oo ok k U U h ho oo ok k Connections Notice Insert the hook from inside to outside Lateral pin of the U hook should be tightened System Manual 5 Mechanical Installation ...

Page 34: ...e conditions on the installation site mainly the geographical and environmental conditions before designing and constructing the foundation Improper foundation construction may affect the placement of the inverter open close of the door and future maintenance Therefore the foundation must be designed and constructed according to the related standard The dimensions and weight of the inverter the ca...

Page 35: ... the foundation and pre bury the wire pipes The dirt dug out should be cleared immediately 5 3 3 Recommended Foundation Construction Plan Overall construction effect of Plan is shown below N No o N Na am me e A Foundation B Pea gravel ground C Solid ground e g gravel Construct foundation according to the scheme shown in figure below System Manual 5 Mechanical Installation ...

Page 36: ...w with the existing operating platform using L mounting parts The steps to fixing the L mounting parts is shown in the following figure 5 3 5 Other Precautions After fixing the inverter should be fully welded with the pre embedded channel steel A drainage system should be designed on the installation site to prevent the inverter from being immersed in water during heavy rainfalls Do not plant any ...

Page 37: ...rs The distance illustrated in this table is the minimum values More space is recommended for better ventilation and higher conversion efficiency of the inverter 5 5 Removing Sealing Tapes To prevent sea water or moisture penetrating into the inverter during ship transport the air inlets and outlets of the inverter are all sealed with sealing tapes The positions of the sealing tapes are shown by A...

Page 38: ...upposedly voltage free may carry lethal voltage Accidental touch may cause serious damage Make sure there is no system ground fault before operation and take proper protection measures Observe all the country specific standards and regulations Connect the module to public grid only after receiving authorization from the local network operator Only professional electricians can perform the operatio...

Page 39: ...erform the electrical connection Professional electricians should meet the related requirements listed in2 Safety Instructions in this manual Sungrow shall not be held liable for any personal injury or property loss caused by ignorance of the safety instructions Ensure the electrical insulation meets requirements before laying the cables Follow the EMC regulation and lay the power cable and commun...

Page 40: ...easurement instrument Ground and short circuit whenever necessary Cover possible live parts to avoid accidental contact 6 2 Preparation before Electrical Connections Electrical connections between devices inside the inverter have been performed before delivery On site the connections between the inverter and external devices need to be performed including DC connection AC connection and communicat...

Page 41: ...rink tubing 1 A tubing with length 2cm longer than the depth of the cable lug is recommended 2 Wrap the cable lug with the heat shrink tubing 3 Shrink the tubing with hot air blower E En nd d Cable protectors are advisable in the cable crosses if the multi core cables are used 6 2 3 Parts for Cabling Incorrect connection of power cables will cause fires Follow the sequence when connecting the powe...

Page 42: ...ion like the screws are within the scope of delivery Rrespect the description in this chapter during connection C Co op pp pe er r W Wiir re e C Co on nn ne ec ct tiio on n If copper wires are used connect the spare parts as described below N No o N Na am me e N No o N Na am me e A Copper bus D Flat washer B Cable lug E Spring washer C Bolt F Nut A Allu um miin nu um m W Wiir re e C Co on nn ne ec...

Page 43: ...ices are through the device bottom 6 2 6 Checking the Cables Check to ensure the intactness and insulation of all cables before electrical connection Poor insulation or damages in the cables may cause hazards Replace them if necessary 6 2 7 During Connection Make sure the DC cables are correctly routed before connection Do not pull the cables hard during connection Make sure there is enough wire b...

Page 44: ...s according to the rules below All the cables must have sufficient ampacity The ampacity of the conductor can at least be influenced by environmental conditions conductor insulation materials laying wire materials cross sectional areas etc All the cables must be chosen according to the maximum current of the inverter AC and DC side and enough allowance is required Cables for one side should be of ...

Page 45: ... Open circuit voltage of the PV array should not exceed the max DC voltage of the inverter The inverter may be damaged if otherwise If a ground fault is detected remove it before performing any DC connection Strictly follow all the instructions when connecting the cables Observe all the safety rules specified by the PV array manufacture Start the DC connection only when all checks and measurements...

Page 46: ...N N m m M16 55 119 140 C Ca ab blle e C Co on nn ne ec ct tiio on n S St te ep ps s Proceed as follows to connect the DC cables step 1 Make sure the switch upstream of the combiner box is in the OFF position step 2 Strip off the insulation cover of the cable with the tripped length of 5mm longer than the depth of the cable lug step 3 Crimp the cable lug It is advisable to select DT is the cable cr...

Page 47: ... Ensure the firmness of the cable connection Poor connection or oxidation of the surface may cause over heating or fire Long bolts may affect the insulation and may cause short circuit Remove the heat shrink tubing between the cable lug and the copper bar if necessary Poor contact or over heating may follow if otherwise step 6 Confirm that all cable connections are secure Finish the DC cable conne...

Page 48: ...lations Strictly follow all the instructions when connecting Strictly follow all device internal instructions when closing opening the AC switches 6 5 2 AC Cable Connection 6 5 2 1 AC Connection Area on the Bottom Proceed as this section to connect the cable when the AC connection area are at the bottom of the inverter O Ov ve er rv viie ew w AC wiring terminals are located at the bottoms of the t...

Page 49: ...lt t T To or rq qu ue e N N m m M16 55 119 140 C Co on nn ne ec ct tiio on n S St te ep ps s step 1 Identify the phases L1 L2 and L3 of the AC copper bar step 2 Strip off the insulation cover of the cable with a stripped length of 5mm longer than the depth of the cable lug Use cable lug based on the cable specification step 3 Crimp the copper cable lug 1 Insert the stripped cables into the cable l...

Page 50: ...nt ts s Three phase copper bar can be connected to the AC side Fasten the wiring terminal with the bolts of M12 80 in the scope of delivery The fastening torque is 60 70N m C Ca ab blle e C Co on nn ne ec ct tiio on n S St te ep ps s step 1 Disconnect the downstream AC switches step 2 Ensure the phase sequence of the AC connection cable is correct step 3 Connect the output copper bus bar L1 to the...

Page 51: ...t B Module cabinet C AC cabinet D Intelligent PMD E Eq qu uiip po ot te en nt tiia all C Co on nn ne ec ct tiio on n o of f I In nv ve er rt te er r I In nt te er rn na all D De ev viic ce es s The grounding copper bar inside the inverter is located at the right side of the inverter as shown in the following figure A Dimensions of the copper bar is shown in the following figure System Manual 6 Ele...

Page 52: ... cable is of 50 mm2 to 95 mm2 Weld the grounding steel flat onto the external grounding point after which anti corrosion processing needs to be performed It is recommended that two points of the inverter should be connected to the ground system of the PV plant The inverter needs to be grounded on site The following operations should also be conducted on site Measure the electrical conductivity bet...

Page 53: ... intelligent power distribution cabinet are shown in the figure below Note This figure is for standard power distribution cabinet and the actual product may differ N No o D De es sc cr riip pt tiio on n A RS485 communication port B Ethernet port On site perform cable connection according to internal terminal markings R RS S4 48 85 5 P Po or rt ts s D De ef fiin na at tiio on n RS485 communication ...

Page 54: ...n the standard version Actual terminal sequence of the device purchased may slightly differ The foregoing terminal identifiers are recommended definitions and may be adjusted according to onsite conditions C Ca ab blle e C Co on nn ne ec ct tiio on n M Me et th ho od d The method for communication cable connection is briefly described in this chapter by using PV combiner box as an example 6 8 Exte...

Page 55: ...voltages get abnormal 6 9 Finishing Electrical Connection After the electrical connection check the connection of all cables for correctness and firmness After ensuring that all connections are correct and firm Check the bottom of the inverter and seal the gaps between the cables with fireproof mud If cable glands are used make sure they are tightened Seal the unused terminal Reassemble the protec...

Page 56: ... No o N Na am me e A PV array 1 DC switch B PV array combiner box 2 AC circuit breaker C Branch board 3 Control switch for internal power supply D Module E MV transformer F MV switchgear G Grid H Intelligent PMD 7 2 Disconnecting the System The following figure shows the steps of disconnecting the system ...

Page 57: ...connecting the Inverter S Sa af fe et ty y I In ns st tr ru uc ct tiio on ns s When the inverter is under load in power on state never manually connect or disconnect switches of the inverter 7 2 1 1 Disconnecting the Inverter Normal Case step 1 Tap S St ta ar rt t S St to op p S St to op p on the LCD screen to stop the inverter step 2 Disconnect all the DC switches shown as A in the figure below o...

Page 58: ...disconnect the inverters step 2 Wait 10 minutes to have the internal capacitors discharge completely and then open the doors of the MV Transformer step 3 Disconnect the load breake switch of the MV transformer by referring to the manual of the MV transformer E En nd d 7 2 3 Disconnecting the PV Combiner Box step 1 Refer to 7 2 1 Disconnecting the Inverter to disconnect the inverters step 2 Disconn...

Page 59: ...Reconnecting the PV Combiner Box Connect DC switches of all upstream combiner boxes of the inverter 7 3 3 Reconnecting the Inverter S Sa af fe et ty y I In ns st tr ru uc ct tiio on ns s When the inverter starts its AC circuit breaker will be automatically connected without manual operation When the inverter stops never manually connect its AC circuit breaker 7 3 3 1 Reconnecting the DC Side of th...

Page 60: ...52 7 3 3 2 Restarting the Inverter Tap S St ta ar rt t S St to op p S St ta ar rt t on the LCD screen to start the inverters 7 Disconnecting and Reconnecting the Syetem System Manual ...

Page 61: ... inverter Grid connection of the inverter can be performed only after receiving approval from the local utility grid company and by qualified personnel When the inverter is operating make sure there are no flammable materials within at least 5m around the installation site Local national standards about the min electric clearance around the inverter should be respected Make sure the installation i...

Page 62: ... 3 1 Checking the Cable Connection Check cables for any possible damages or cracks Check that all cables are connected securely according to the cable connection diagram Adjust the cable connection if necessary Ensure all cable connections are firmly enough Fix the bolts if necessary Check the PE equipotential connection Ensure PE ground point of the internal devices has been connected to the equi...

Page 63: ...n the device when the PV array output status is stable The PV field circuit fault module fault or module numbers deviation in certain array cable damages or connection looseness may cause the voltage deviation exceeding 3 under stable environmental conditions Record the environmental parameters temperature radiation etc Measure the resistance of cables between the terminal box and the inverter Rec...

Page 64: ...touch screen to power on step 3 Stop the inverter through the touch screen step 4 Turn off Trip Enable and Door protect enable through the touch screen step 5 Manually close all DC switches inside the DC cabinet step 6 Perform the start operation through the touch screen and the inverter starts grid connected operation E En nd d To ensure the inverter operates normally for the first time measure t...

Page 65: ...st for 1 week i e 168 hours The commissioning of the inverter is completed The inverter operates normally After successful commissioning the inverter will be put into operation When the inverter is operating make sure there are no flammable materials or other materials within at least 5 meters around the installation site Local national standards about the min electric clearance around the inverte...

Page 66: ...a thorough and careful inspection is necessary before the inverter is powered on 9 1 2 Start Steps When the foregoing conditions are met proceed as follows to start the inverter step 1 Close the upstream and downstream switches of the inverter step 2 Manually close the auxiliary power supply switch inside the inverter and wait the touchscreen to be powered on step 3 Stop the inverter through the t...

Page 67: ...ide and auxiliary power supply switches step 3 Disconnect the inverter downstream switches step 4 Disconnect the inverter upstream switches step 5 The inverter stops running E En nd d Never disconnect the AC or DC switch during normal operation Otherwise the inverter as well as the switch may be damaged 9 2 2 Stop in Case of Fault Proceed as follows to stop the inverter when a fault or an emergenc...

Page 68: ...emergency or a fault occurs Under normal conditions stop the inverter via the stop instruction on the LCD panel Press the emergency stop button immediately in case of emergency to make to ensure a timely response 9 Starting Stopping System Manual ...

Page 69: ...check the button cells on the back of the LCD panel and replace them if necessary 10 2 Default Screen 10 2 1 Initialization The LCD is initialized and then enters into the starting menu The initialization screen appears every time the inverter is powered on After initialization the default screen follows 10 2 2 Default Screen Introduction N No o D De es sc cr riip pt tiio on n A Yield data The fir...

Page 70: ...creensaver If no operation has been performed on the screen for more than 5 minutes the backlight will go off Tap the screen to activate the backlight so that the latest interface reappears 10 3 Overview of LCD Menu and Icon 10 3 1 Overview of Submenu and Icon There are three buttons on the lower left side of the touch panel for the user to operate Start Stop Home Function The user can perform rel...

Page 71: ...below except for the default menu N No o D De es sc cr riip pt tiio on n A Title bar The first line on the top indicates the present success rate of communication The left side of the second line is the name of the present page while the right side is the present date and time B Data display or parameter configuration C From left to right there are three main icons and a return button which is use...

Page 72: ...on n F Fu un nc ct tiio on n Backspace key delete the digit input Clr Clear the digitals input Esc Escape and close the keypad Enter Confirm the password entered Max Min The maximum and minimum value can be input digital outside this range is invalid If the input password is correct the parameter setting page pops up and the user can set the system parameters running parameters protection paramete...

Page 73: ...anguage by tapping the language button By tapping the button the language will switch among English Chinese and the like The language displayed on the button is the present display language 10 6 Setting Date and Time step 1 Tap Function from the default menu step 2 Tap Set parameter step 3 Tap Sys parameter after entering the correct password step 4 Tap Time and enter into the date and time settin...

Page 74: ...og gr ra am m The histogram shows the present day in histogram Proceed as follow to view the running information step 1 Tap Function from the default menu step 2 Tap Run information and switch among Real Time Data Power curve and E histogram The default display is Real Time Data step 3 Tap Power curve and enter into the power curve sub menu step 4 Tap E histogram and enter into the electricity his...

Page 75: ...into the history information sub menu step 3 Tap His fault and enter into the history fault sub menu History faults can be viewed from this sub menu with up to 5 records can be shown in one page The upper left side of the event table is the total number of the current fault records Tap Prev or Next to turn pages up or down E En nd d 10 8 4 Checking History Alarm Proceed as follows to check the his...

Page 76: ... 1 will appear with the fault item in red 10 10 Starting Stopping Usually the inverter will start automatically when the grid connected requirements are met Start stop the inverter through the LCD screen in either of the following manners Tap Start Stop on the default menu Tap Start Stop from the Function menu Start or stop the inverter by tapping the start stop button on the screen A confirm oper...

Page 77: ...firmware version sub menu step 5 The firmware versions of LCD and DSP are shown at the bottom of the page E En nd d 10 13 Parameters of LCD 10 13 1 Communication Parameters Improper communication parameter configuration may lead to communication failure Follow strictly the instructions of the plant staff in configuring the communication parameters There are the RS485 communication and Network comm...

Page 78: ...eter to enter the following interface Six parameters pertinent to the Network communication can be set DNS address 1 and DNS address 2 can be set to the default value Other parameters are assigned by plant staff Set parameter with the aid of the pop up keypad 10 13 2 Running Parameters S Se et tt tiin ng g R Ru un nn niin ng g P Pa ar ra am me et te er rs s step 1 Tap Function from the default men...

Page 79: ...nal power Q adjust switch Power off saved Pf If the power factor setting can be saved when the LCD screen is powered off Power off saved P limited If the limit power setting can be saved when the LCD screen is powered off SVG switch If the reactive power compensation is activated or deactivated T recover s Automatic recovery time when fault occurs P rise rate s Rate of rise of the active power P d...

Page 80: ... frequency or during frequency change FW enable power After the FW function is enabled the FW function is started when the percentage of the actual output active power is greater than the set value 50Hz UF increase start Hz For 50Hz grid type refer to f1s figure 10 1 The relation curve between the active power and the frequency 50Hz UF increase end Hz For 50Hz grid type refer to f2s figure 10 1 Th...

Page 81: ... 2 The relation curve between the reactive power and the voltage QU volt rise end Refer to U2i in figure 10 2 The relation curve between the reactive power and the voltage QU volt drop start Refer to U1s in figure 10 2 The relation curve between the reactive power and the voltage QU volt drop end Refer to U2s in figure 10 2 The relation curve between the reactive power and the voltage V auto adj r...

Page 82: ... corresponding to the decline start point of QU voltage QU var rise end The max inductive reactive power corresponding to the rising end point of QU voltage QU var drop end The max capacitive reactive power corresponding to the decline end point of QU voltage QU PF start Refer to the power factor corresponding to Q3 in figure 10 2 The relation curve between the reactive power and the voltage QU PF...

Page 83: ... The relation curve between the active power and the frequency The relation curve between the reactive power and the voltage is shown in the figure below f fiig gu ur re e 1 10 0 2 2 The relation curve between the reactive power and the voltage Q P mode curve is shown in following figure System Manual 10 LCD Menu Operation ...

Page 84: ...c Limit Power 0 115 110 Pf 0 8 1 0 8 1 1 Q limit 104 5 104 5 0 Q adjust switch Close Pf Q limit QU mode V auto adj QP mode Pf Power off saved Pf Save Not save Save Power off saved P limited Save Not save Not save SVG switch Enable Disable Disable T recover s 20 600 60 P rise rate s 0 01 500 Country specific P decline rate s 0 01 500 Country specific Q rise rate s 0 01 500 Country specific Q declin...

Page 85: ... power recover frq Hz 50 55 60 65 Country specific OF decrease slope 0 2 Country specific OF decrease limit 0 115 Country specific FW input type RT freq Record freq Country specific FW enable power 0 115 0 50Hz UF increase start Hz 45 50 Country specific 50Hz UF increase end Hz 45 50 Country specific 60Hz UF increase start Hz 55 60 Country specific 60Hz UF increase end Hz 55 60 Country specific UF...

Page 86: ...y specific V auto adj ref 90 110 100 V auto adj hysteresis 0 10 1 QP mode Var PCT adj CosPhi adj Country specific QP_K1 1 1 Country specific QP_K2 1 1 Country specific QP_K3 1 1 Country specific QP_P1 0 100 Country specific QP_P2 0 100 Country specific QP_P3 0 100 Country specific Reactive power response time 0 60 Country specific Q P upper PF 0 9 1 1 Q P lower PF 0 9 1 0 9 Q P upper power 50 100 ...

Page 87: ...ific Active derating volt start 100 140 Country specific Voltage rise suppression Enable Disable Country specific Refer to the LCD screen for the specific parameters and setting ranges Specific setting ranges of these parameters are displayed on the LCD at night when the inverter enters standby mode but does not enter the deeper standby mode with lower power consumption the SVG function needs to b...

Page 88: ...r voltage protection Ⅱ value Protection is activated when voltage exceeds this value Ⅲ_Vgrid max Set the grid over voltage protection Ⅲ value Protection is activated when voltage exceeds this value Ⅳ_Vgrid max Set the grid over voltage protection Ⅳ value Protection is activated when voltage exceeds this value Ⅴ_Vgrid max Set the grid over voltage protection Ⅴ value Protection is activated when vol...

Page 89: ...under voltage protection Ⅳ trip time Ⅴ_T Vlow trip ms Grid under voltage protection Ⅴ trip time Ⅰ_Fgrid max Hz Set the grid over frequency protection I value Protection is activated when frequency exceeds this value Ⅱ_Fgrid max Hz Set the grid over frequency protection II value Protection is activated when frequency exceeds this value Ⅲ_Fgrid max Hz Set the grid over frequency protection Ⅲ value P...

Page 90: ... this value Ⅴ_Fgrid min Hz Set the grid under frequency protection Ⅴ value Protection is activated when frequency is lower than this value Recover_Fgrid min Hz The inverter recovers normal operation when grid frequency is above this value Ⅰ_T Flow trip ms Set the grid under frequency I tripping time Ⅱ_T Flow trip ms Set the grid under frequency II tripping time Ⅲ_T Flow trip ms Set the grid under ...

Page 91: ...door control protection Fault manual restart Manual fault restart If this function is enabled the inverter can reconnect to the grid only after the fault is removed manually Negative Vgrid protect value V Protection value of negative voltage to ground Grid_V unbalanced protect value 3 phase grid voltage unbalance protection threshold value Grid_V unbalanced protect time S 3 phase grid voltage unba...

Page 92: ...once the negative positive insulation resistance to earth is lower than 10KΩ Note The foregoing alarm fault information can be viewed on the LCD display by tapping Home Work state Floating mode Floating mode When it is enabled the negative to earth contactor of the inverter will be disconnected When it is disabled the negative to earth contactor of the inverter will not be disconnected Ins monitor...

Page 93: ...105 150 Country specific Ⅴ_Vgrid max 105 150 Country specific Recover_Vgrid max 105 150 Country specific Ⅰ_T Vhigh trip ms 40 36000000 Country specific Ⅱ_T Vhigh trip ms 40 36000000 Country specific Ⅲ_T Vhigh trip ms 40 36000000 Country specific Ⅳ_T Vhigh trip ms 40 36000000 Country specific Ⅴ_T Vhigh trip ms 40 36000000 Country specific Ⅰ_Vgrid min 10 95 Country specific Ⅱ_Vgrid min 10 95 Country...

Page 94: ...w trip ms 40 36000000 Country specific Ⅱ_T Flow trip ms 40 36000000 Country specific Ⅲ_T Flow trip ms 40 36000000 Country specific Ⅳ_T Flow trip ms 40 36000000 Country specific Ⅴ_T Flow trip ms 40 36000000 Country specific LVRT switch Enable Disable Country specific LVRT T1 ms 40 36000000 Country specific LVRT T2 ms 40 36000000 Country specific LVRT T3 ms 40 36000000 Country specific LVRT T4 ms 40...

Page 95: ...r protect enable Enable Disable Disable Fault manual restart Enable Disable Country specific Negative Vgrid protect value V 20 200 50 Grid_V unbalanced protect value 3 20 5 Grid_V unbalanced protect time S 0 1 600 60 Analog fault enable Enable Disable Country specific Anti PID mode Invalid Suppression Repair Invalid PID Repair Enter Cancel Ins monitor measure time S 30 150 300 600 150 Ins monitor ...

Page 96: ... 1 6000 Country specific Manual IDM AC Enter Cancel Only authorized personnel can configure these parameters If there is any question or doubt contact Sungrow Refer to the LCD screen for the specific setting ranges of these parameters is only for some countries 10 LCD Menu Operation System Manual ...

Page 97: ...sition and the upstream and downstream connections are disconnected The inverter is therefore electricity free I In niit tiia all S St ta an nd db by y When switches of the upstream and downstream devices are closed and the DC switches AC circuit breaker of the inverter are in the ON position the inverter turns to the I In niit tiia all S St ta an nd db by y mode The inverter will continuously che...

Page 98: ...the fault type with the Fault indicator on until the fault is removed After the fault is removed the inverter reverts to R Ru un n mode If the fault is unrecoverable stop the inverter and perform maintenance work It will automatically check if the fault is recoverable When a DSP fault or a module fault occurs never restart the inverter through the LCD Perform apower off check before reenergizing t...

Page 99: ...ability Grid maintenance Grid management 11 2 2 How to Realize Power Limitation Improper parameter configuration may affect the normal operation of the inverter Only authorized personnel can configure these parameters If there is any question or doubt contact Sungrow User can adjust the inverter active power output through the LCD display step 1 Tap Function from the default menu step 2 Tap Set pa...

Page 100: ...age automatic adjusting by setting the voltage adjusting benchmark and hysteresis reactive power can be dynamically adjusted and the actual voltage tracking setting benchmark can be controlled QP mode the PF changes with the output power of the inverter step 5 If Pf is selected the power factor can be set in the Run information sub menu if Q limit is selected the Q limit can be set in the Run info...

Page 101: ...u up pp po or rt t During LVRT power station should feed reactive current to the power system as per requirements For a station whose 500kV or 750kV voltage is stepped up from the 220kV or 330kV voltage and then connects to the power station group it should feed reactive current to the grid when a short circuit occurs and the voltage drops Z Ze er ro o V Vo ollt ta ag ge e R Riid de e T Th hr ro o...

Page 102: ...u is the grid connection point nominal voltage f fiig gu ur re e 1 11 1 2 2 High voltage withstand requirements Note T1 T2 U1 and U2 are all settable parameters Sungrow s inverter meets the abovementioned requirements 11 6 Temperature Derating 11 7 MPPT Maximum Power Point Tracking MPPT is a technique that the inverter uses to get the maximum power from the PV arrays PV arrays have a complex relat...

Page 103: ...1 Introduction Insulation resistance is a parameter important for safety operation If the insulation resistance is low the direct contact protection and indirect contact protection may be failed meanwhile the fault current against the ground and the short circuit caused by low insulation resistance may lead to an electric fire device damage or even physical hazards Sungrow s inverter is equipped w...

Page 104: ...id send warning signal and display the fault type on the LCD screen The inverter can detect the abnormal voltage and respond quickly 11 10 3 Frequency Anomaly Protection When the grid frequency exceeds the permissible range the inverter will stop feeding the grid send warning signal and display the fault type on the LCD screen The inverter can detect the abnormal frequency and respond quickly 11 1...

Page 105: ...s the setting value the system will send an instruction to stop the inverter and display the fault type on the LCD screen 11 10 7 Module Over temperature Protection IGBT modules inside the inverter use a high precision thermal sensor to monitor the real time module temperature Once high module temperature is detected DSP will send instruction to stop the inverter 11 10 8 Internal Over temperature ...

Page 106: ...ame manufacturer and with the same model number The model number can be acquired from the marking of the inverter or the component itself If otherwise contact Sungrow If the components need to be replaced with products from other manufacturers or of different model on site a prior analysis and confirmation by Sungrow is required Failure to follow this procedure may lead to physical injury or death...

Page 107: ... Minor Some components are faulty but the inverter can still feed power to the grid Warning Functions of the inverter are normal but the output power drops due to external factors The fault severity of fault names and their corresponding solutions are shown in the following table F Fa au ullt t n na am me e E Ex xp plla an na at tiio on n F Fa au ullt t s se ev ve er riit ty y M Me ea as su ur re ...

Page 108: ...mperature inside the control cabinet Major 1 Check the grid voltage and inspect whether the grid voltage harmonic is normal 2 Check whether the fans operate normally 3 Check the AC filtering system and inspect whether the AC filter capacitor is damaged for example cracked Check whether the 3 phase current of the capacitor is in balance when necessary Vdc Low The DC input voltage is excessively low...

Page 109: ...th a thermodetector whether the present ambient temperature is within the permissible range of the module 2 Check that the air inlets of the inverter and inverter are not obstructed Replace the filters when necessary 3 Check in the S St to op p mode whether fans inside the module are clogged by foreign materials DC cabinet over temp The temperature in the DC cabinet is excessively high Major Refer...

Page 110: ...ther power outage occurs on the AC side 3 Check whether the AC circuit breakers of the module are connected Ctrol power supply flt The control power supply is abnormal Major 1 Check whether the control switches of both the internal and external power supply are in the ON or OFF positions If all switches are in the ON position disconnect a switch If all switches are in the OFF position connect a sw...

Page 111: ...ontact AC SPD flt The SPD on the AC side of the module is faulty Major 1 Refer to the measure for DC SPD flt 2 Check whether the micro circuit breaker connected in series to the SPD is disconnected 3 If the micro circuit breaker is disconnected measure the AC and DC parameters If the values measured are normal reconnect the micro circuit breaker Vdc high The DC voltage of the module exceeds the pr...

Page 112: ...h I leakage pro The sampling value of the AC leakage currents exceeds the protective threshold Major 1 Check whether the AC cables are damaged 2 If the LV side of the transformer is connected in the Y type ensure that the neutral point is unconnected PM high The temperature of modules inside the module room is excessively high Major 1 Check the air inlets 2 Check whether the air outlets of the inv...

Page 113: ...her AC switches are damaged 3 Check whether AC switches are connected disconnected normally 4 Check AC switches for conductivity with a multimeter Radiator over temp The temperature of the heat sink inside the inverter is excessively high Major Check whether the fans are normal If the fans are normal check whether the air ducts are obstructed DC fuse flt DC fuses are abnormal Major Refer to the me...

Page 114: ...re dusty Replace the filters when necessary Anti PID power fit Anti PID power supply is abnormal Minor 1 Check the insulation of AC cables 2 Check AC SPD 3 Check the neutral point on the LV side of the transformer and ensure it is not grounded External power supply External power supply of the inverter is abnormal Minor Measure the external power supply voltage with a multimeter to check whether t...

Page 115: ...rd are securely fastened DC fuse abnorm al DC fuses of the inverter are abnormal Minor Check whether the DC fuse have blown If so contact Sungrow and replace the fuses Branch Fuse flt Branch fuses of the inverter are abnormal Minor Refer to the measures for DC fuse abnomal RISO flt The insulation resistance is excessively low Minor 1 Check whether insulation layers of positive and negative DC cabl...

Page 116: ...asures for Branch breaker flt Check whether the DC switch is connected I leakage pro The sampling value of the AC leakage currents exceeds the protective threshold Major 1 Check whether the AC cables are damaged 2 If the LV side of the transformer is connected in the Y type ensure that the neutral point is unconnected If the fault still exists contact Sungrow Service If the following fault occurs ...

Page 117: ... The communication of the tributary board inside the inverter is abnormal Minor Contact Sungrow DC Sensor err DC sensors of the inverter are abnormal Minor Contact Sungrow Branch fwd Idc high Branch forward current is excessively high Minor Contact Sungrow Branch rev ldc high Branch reverse current is excessively high Minor Contact Sungrow T H com flt The communication of the temperature humidity ...

Page 118: ...D display and the DSP LCD power supply malfunction Check the connection between the LCD display and the DSP when the inverter is voltage free Failure to communicate with PC Possible reasons are various Refer to the Measures Check if the address and the Baud rate of the LCD are the same as those of PC Check to ensure the circuits are properly connected and if the RS485 communication is adopted the ...

Page 119: ...ng any work on the inverter Only qualified personnel can perform the work described in this chapter Do not leave any screws washers or other metallic parts inside the inverter to avoid damages to the inverter Sand and moisture penetration may affect the performance of electric devices inside the inverter Do not perform electrical connection in sandy season or when the ambient relative humidity is ...

Page 120: ... is also required esp when the system performance is poor 13 2 2 Maintenance Interval Maintain the inverter and internal electric devices periodically to ensure the good performance of the inverter The maintenance interval described in this chapter is indicative only The actual interval depends on the on site environment condition If the inverter is located in harsh environment place for example d...

Page 121: ...Check whether the interior temperature or enclosure temperature of the inverter is excessively high Check whether the humidity and dust inside the inverter are within normal ranges and dust the inverter if necessary Check whether the air inlet and outlet are blocked Warning labels and marks Check whether the warning labels and marks are firmly attached and clearly legible Replace them if necessary...

Page 122: ...ide the container Air inlet outlet Check whether the air inlet filters and ventilation ducts of the inverter and its internal devices are normal and clean or replace the filters if necessary Cable connection and routing Check the inverter when the internal devices are completely voltage free Make corresponding corrections once any anomaly is founded Check whether all cables and wires are properly ...

Page 123: ... e o on nc ce e e ev ve er ry y 6 6 m mo on nt th hs s t to o a a y ye ea ar r C Ch he ec ck k iit te em m C Ch he ec ck k m me et th ho od d Safety function Check the stop functions of the emergency stop button and the LCD Simulate shutdown Check the warning labels and other device symbols for completeness and legibility and replace them in time if necessary Software maintenance Inspect all param...

Page 124: ...e inverter interior is important for the maintenance of the inverter Due to ambient temperature humidity dust and vibration there may be dust deposition inside the inverter blocking the air entries and penetrating inside the inverter internal devices This may cause damage to the internal devices of the inverter shorten the service life and reduce power yields During device normal operation check a...

Page 125: ...d back sides of the inverter are entrances of cool air Periodically clean and replace the filter cotton and filter screen to ensure the air circulation and proper temperature inside the inverter Clean and replace the air inlet window outside the inverter step 1 Push the two spring lock catches toward the middle of the air inlet window to open the outside shutters of air inlet window step 2 Remove ...

Page 126: ...and hinge of the inverter after the cleaning work Lubricate the lock and hinge if necessary 13 3 8 Checking the Sealing Strip The sealing strip is used to prevent the water penetrating insider the inverter Check it carefully for damage Replace the faulty sealing strip in time 13 4 Painting Make up Measures Check for the damages of the inverter appearance S Siit tu ua at tiio on n 1 1 smudginess on...

Page 127: ... 97 alcohol until the surface is clean enough to accept Or try other local frequently used non corrosiveness detergent M Ma aiin nt te en na an nc ce e a an nd d o op pe er ra at tiio on n s st te ep ps s f fo or r s siit tu ua at tiio on n 2 2 Materials Abrasive paper Rag Water Alcohol Hairbrush Paint RAL7035 Munsell color JN 82 N8 2 System Manual 13 Routine Maintenance ...

Page 128: ...e 97 alcohol 3 When the surface is clean and dry paint the scratched parts of the paint by banister brush and make sure the painting is as uniform as possible M Ma aiin nt te en na an nc ce e a an nd d o op pe er ra at tiio on n s st te ep ps s f fo or r s siit tu ua at tiio on n 3 3 Materials Abrasive paper Rag Water Alcohol Zinc primer Hairbrush 13 Routine Maintenance System Manual ...

Page 129: ...he surface is clean and dry paint the base material revealed parts with zinc primer or other local primers with the same function for protection The paints should cover the revealed primer completely 4 Paint the scratched parts by banister brush when the primer is dry and make sure the painting is as uniform as possible Check the protective paint on the module surface for peeling off Re paint the ...

Page 130: ... by Sungrow is required Failure to follow this procedure may lead to physical injury or death and void all warranty from Sungrow 13 5 1 Safety Instructions Strictly observe the instructions in this chapter to replace the fuse Any personal injury or property damage caused by the disobedience of this chapter may void pertinent warranty claims from Sungrow Only qualified technical persons who have fu...

Page 131: ...acitor inside the machine discharges completely step 4 Use a multimeter with a measuring range of 1500Vdc to check whether voltages of the connection terminal on the DC side of the inverter are zeros where the voltages include the voltage between the positive and negative poles the positive to ground voltage and the negative to ground voltage step 5 Open the left door with the key and remove the p...

Page 132: ...e e 1 As shown in the right figure identify the faulty fuse 2 Remove the micro switch A in the figure attached to the fuse and use the fuse extractor not in the scope of delivery to remove the fuse 3 Mount the new fuse 13 Routine Maintenance System Manual ...

Page 133: ...ng g T Ty yp pe e D De es sc cr riip pt tiio on ns s F Fiig gu ur re e 1 Unscrew fastening bolt of the to be replaced fuse with a socket spanner 2 Remove the fuse 3 Use M8 30 bolt to fasten new fuse with a socket spanner Fastening torque 18 23N m System Manual 13 Routine Maintenance ...

Page 134: ...rent 4178A O Ou ut tp pu ut t A AC C AC output power at PF 1 3593 kVA 25 C 3437 kVA 45 C 3125 kVA 50 C 3593 kVA 25 C 3437 kVA 45 C Max AC output current 3458 A Nominal AC voltage 600 V AC voltage range 480 V 690 V Nominal grid frequency 50 Hz 60 Hz Grid frequency range 45 55 Hz 55 65 Hz THD 3 at nominal power DC current injection 0 5 In Power factor at nominal power 0 99 Adjustable power factor 0 ...

Page 135: ...lative humidity range 0 95 non condensing Cooling method Temperature controlled forced air cooling Max operating altitude 4000 m 3000 m derating 4000 m 2300 m derating Display Touch screen Communication Standard RS485 Ethernet Optional optical fiber Grid support Q at night optional L HVRT active reactive power control and power ramp rate control 14 2 Tightening Torques Tighten the cable with prope...

Page 136: ... or operate the product under incorrect safety or protection conditions Alter the product or supplied software without authority Product malfunctions due to operation attached or neighboring devices running out of the allowed limit values Unforeseen calamity or force majeure The use of supplied software produced by Sungrow Power Supply Co Ltd is subject to the following conditions Sungrow Power Su...

Page 137: ...service greece sungrow co India Sungrow India Private Limited Gurgaon 9108041201350 service in sungrowpower com Italy Sungrow Italy Milano service italy sungrow co Japan Sungrow Japan K K Tokyo 81 3 6262 9917 japanservice jp sungrowpower com Korea Sungrow Power Korea Limited Seoul 827077191889 service kr sungrowpower com Malaysia Sungrow SEA Selangor Darul Ehsan 6019897 3360 service my sungrowpowe...

Page 138: ...ntative Bureau Istanbul 90 2127318883 service turkey sungrow co UK Sungrow Power UK Ltd Milton Keynes 44 0 0908 414127 service uk sungrow co U S A Mexico Sungrow USA Corporation PhoenixArizona 1833 7476937 techsupport sungrow na com Vietnam Sungrow Vietnam Hanoi 84 918 402 140 service vn sungrowpower com 14 Appendix System Manual ...

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