Related Manuals for Sungrow SG3425UD
Summary of Contents for Sungrow SG3425UD
- Page 1 System Manual Outdoor Inverter SG3425UD/SG3600UD SG3425UD/ SG3600UDOutdoor InverterSystem ManualSG3425UD_3600UD-SEN- Ver14-202208M-H-002150 SG3425UD_3600UD-SEN-Ver14-202208...
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Page 3: Table Of Contents
Contents 1 About This Manual ...................1 1.1 Validity......................1 1.2 Content......................1 1.3 Target Group ....................1 1.4 Symbols Explanation ..................2 1.5 How to Use this Manual ..................3 1.6 Terminology ....................3 2 Safety Instructions ....................4 2.1 Intended Usage....................4 2.2 Important Safety Instructions ................4 2.2.1 General Safety Rules ................5 2.2.2 Manual Storage ..................5 2.2.3 PV Arrays Hazards ................6... - Page 4 3.2.1 Internal Components ................12 3.2.2 Internal Devices of the Inverter.............13 3.2.3 Operations on the DC and AC Side ............14 4 Delivery ......................17 4.1 Scope of Delivery ..................17 4.2 Identifying the Inverter ..................18 4.3 Checking for Transport Damages..............18 4.4 Storage of the Inverter ..................18 5 Mechanical Installation ..................20 5.1 Transport .....................20...
- Page 5 6.5 AC Connection .....................39 6.5.1 Safety Notices ..................39 6.5.2 AC Connection Area on the Side ............39 6.5.3 AC Connection Area at the Bottom ............40 6.6 Communication Connection ................43 6.7 Ground Connection ..................43 6.8 Finishing Electrical Connection ..............44 6.9 Closing the Inverter Door ................46 7 Commissioning ....................47 7.1 Safety Instructions ..................47...
- Page 6 9.5 Language Setting ..................58 9.5.1 Conventional Way ................58 9.5.2 Shortcut .....................58 9.6 Setting Date and Time ..................58 9.7 Checking Running Information ..............59 9.8 Checking History Information ................59 9.8.1 Checking History Event ...............59 9.8.2 Checking History Data ................60 9.8.3 Checking History Fault ................60 9.8.4 Checking History Alarm ..............60 9.9 Checking Present Fault Information ..............60 9.10 Starting/Stopping ..................61...
- Page 7 10.9.4 Islanding Protection................71 10.9.5 Overload Protection................71 10.9.6 Ground Protection ................71 10.9.7 Module Over-temperature Protection ..........71 10.9.8 Internal Over-temperature Protection ..........71 11 Troubleshooting ....................72 11.1 Safety Instructions ..................72 11.2 Checking Fault ...................72 11.3 Fault and Troubleshooting on the Inverter .............73 11.4 Other Fault and Troubleshooting ..............84 12 Routine Maintenance ..................85 12.1 Overview....................85...
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Page 9: About This Manual
About This Manual Validity This manual is intended for the following product: • SG3425UD • SG3600UD Content This manual contains the following information: Description Content Safety instructions on the installation, operation, maintenance, and Safety troubleshooting of the inverter instruction Product... -
Page 10: Symbols Explanation
1 About This Manual System Manual • Equipped with certain electrical wiring and mechanical knowledge and familiar with electrical and mechanical principle diagram • Familiar with the construction and working principle of the PV grid-connected power generation system • Familiar with the construction and working principle of the inverter upstream and downstream equipment •... -
Page 11: How To Use This Manual
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. -
Page 12: Safety Instructions
Safety Instructions Intended Usage The inverter, designed and manufactured by Sungrow, is mainly applied to large-and- medium PV power station. The inverter can meet the requirements of modular design and quick installation for large-and-medium PV power station and can ensure the long-term, reliable, and safe feed-in operation. -
Page 13: General Safety Rules
System Manual 2 Safety Instructions 2.2.1 General Safety Rules Touching the terminals or contactors connected to the grid may lead to electric shock! • Do not touch the terminals or conductors connected to the grid. • Respect all safety instructions on the grid connection. Lethal voltages are present inside the device! •... -
Page 14: Pv Arrays Hazards
2 Safety Instructions System Manual 2.2.3 PV Arrays Hazards DC high voltage! Electric shock hazards! When exposed to sunlight, PV array will produce voltage, which is very high in large-scale power station Death from burning and electric shock due to touching the PV array. During installation, maintenance, and troubleshooting of the device, ensure that: •... -
Page 15: Volt-Free Operations
System Manual 2 Safety Instructions 2.2.7 Volt-free Operations Perform operations on the inverter only when all devices inside the inverter are completely voltage-free. • Avoid any inadvertent re-connections. • Verify that no voltage or current is present with appropriate measurement instrument. •... -
Page 16: Safety Warning Signs
2 Safety Instructions System Manual Do not damage or tear the symbols. • All symbols on the device body must be clearly legible. • Replace the symbols once any damage or illegibility is detected. 2.2.12 Safety Warning Signs During transport, installation, maintenance, and troubleshooting of the inverter, keep unauthorized persons away. -
Page 17: Manual Description
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 in this manual occur, contact Sungrow. -
Page 18: Product Description
Product Description Overall Design of the Inverter 3.1.1 Inverter Views Control and Monitoring Window 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 emergency stop button is at the lower part. -
Page 19: Mechanical Parameter
System Manual 3 Product Description Description Color The control circuit power supply is supplying power. POWER Green Inverter is in stop mode. White OPERATI- Inverter is in grid-connected run mode. Green Yellow Inverter is in alarm run mode. A fault occurs and has not been removed. FAULT The indicator will be off when the fault is cleared. -
Page 20: Ventilation Design
3 Product Description System Manual 3.1.3 Ventilation Design The ventilation system is designed as the cool air is drawn from the top of the inverter and hot air is exhausted from the bottom of the inverter. 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:... -
Page 21: Internal Devices Of The Inverter
System Manual 3 Product Description Description Device That includes fuses and DC switches. Cooper DC cabinet bars at the bottom of the DC cabinet are used for DC-side cable connections. That includes AC circuit breakers and RS485 AC cabinet communication terminals. Air outlets 3.2.2 Internal Devices of the Inverter The inverter contains the DC cabinet, the module cabinet, the AC cabinet. -
Page 22: Operations On The Dc And Ac Side
3 Product Description System Manual *The figure above is indicative only. Description Remark Name Connecting/disconnecting the DC DC load break switch side of the inverter. QS2* Connecting/disconnecting the Energy storage device switch energy storage device. QS4* Disconnect the switch before maintaining DC cabinet DC maintenance switch components. - Page 23 System Manual 3 Product Description Description Name When the circuit breaker has no energy, Manual energy storage manually store energy through this button. handle Display the present state of the circuit Circuit breaker state breaker, OPEN or CLOSED indicator The breaker is switched off when this button Push OFF button is pressed The breaker is switched on when this button...
- Page 24 3 Product Description System Manual After the breaker is switched on, the breaker panel displays CLOSED. 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...
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Page 25: Delivery
Delivery Scope of Delivery The scope of delivery of the inverter is shown in the following table: Device Note Inverter System manual, delivery inspection report, Enclosed documents certification, and warranty card Door keys of inverter Keys to monitor window Keys of inverter enclosure Bolt M12×55... -
Page 26: Identifying The Inverter
Therefore, once receiving the inverter, perform a detailed inspection. If any damage is found, contact the forwarding company or Sungrow immediately. • Check the scope of delivery described in "4.1 Scope of... - Page 27 System Manual 4 Delivery • Store the inverter indoors, for example, large warehouse or workshop, to prevent possible condensation or damp. If the inverter has to be stored outdoors, elevate the inverter base according to the geological and ambient conditions. When the ambient temperature is too low, heat the inverter internal devices.
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Page 28: Mechanical Installation
Mechanical Installation Respect all local standards and requirements during mechanical installation. Transport All devices are installed inside the inverter before delivery. The inverter should be transported as a whole. Transport the inverter by a crane with sufficient load capacity. The inverter is delivered to the user by the forwarding company. After unloading, the inverter will be transported to the installation site by the plant staff. - Page 29 System Manual 5 Mechanical Installation – When multiple inverters are transported, in addition to fixing the top and bottom of the cabinets to the transportation vehicle, ropes are also needed to connect the lifting rings between the cabinets.
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Page 30: Hoisting The Inverter
5 Mechanical Installation System Manual Description Top lifting rings, a total of 4, used only for fixing inverter during transportation Notice: 1. The hoisting ring is only for transportation, and it is strictly prohibited for lifting the inverter. 2. When using ropes to fix the top lifting ring to the transportation vehicle, it is strictly forbidden to scratch the inverter cabinet with the rope. -
Page 31: Hoisting
System Manual 5 Mechanical Installation • 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. •... - Page 32 5 Mechanical Installation System Manual Requirement Item Source The lifting rope can be a sling or a nylon rope. The lift ropes 1 must be the same in length (≥ 3,500mm). Beyond the scope of The load that a single rope 1 can withstand, Lifting rope 1 supply.
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Page 33: Fastening Of Connectors
National and local safety rules should be observed at all times. Violating relevant safety rules may void pertinent warranty claims from Sungrow. Foundation 5.3.1 Selection of Installation Site When selecting the installation site, consider the following requirements at least: •... -
Page 34: Recommended Foundation Construction Plan
5 Mechanical Installation System Manual constructed according to the related standard. The dimensions and weight of the inverter, the cable route, and the future maintenance should be considered at all times. The following conditions must be met: • The bottom of the foundation should be firm enough. •... -
Page 35: Other Precautions
System Manual 5 Mechanical Installation Figure Name 20# steel channel Inverter base Step Operation platform 5.3.4 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. -
Page 36: Removing The Sealing Tapes
5 Mechanical Installation System Manual Removing the Sealing Tapes Before delivery, the air inlet of the inverter and the heat exchanger are all pasted with sealing tapes, shown as A and B respectively. Removing these sealing tapes before the inverter is put into operation. Clearance Requirement The minimum reserved clearances around the inverters are shown in the following figure. -
Page 37: Electrical Installation
Electrical Installation Safety Instructions 6.1.1 Generals Rules High voltage! Electrical shock hazards! • Do not touch the live components of the device. • Make sure the AC and DC sides are voltage-free before installation. • Never put flammable materials in the vicinity of the module. If a ground fault occurs in the PV system, some parts that are supposedly voltage- free may carry lethal voltage. - Page 38 " 2 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.
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Page 39: Preparation Before Electrical Connections
System Manual 6 Electrical Installation Select optical fibers as the external communication cable to lower the signal interference. Five Safety Rules During electrical connections and other operations on the module, observe the following Five Safety Rules: • Disconnect all the external connections and disconnect the inverter internal power supply. -
Page 40: Opening The Inverter Door
6 Electrical Installation System Manual 6.2.2 Opening the Inverter Door Opening the Enclosure The locks are installed on the inverter enclosure (Figure A below). Open the protective cover on the door lock. Insert the key. Turn the handle counterclockwise to unlock the door. Opening the Door Lock Open the doors before cable connection. -
Page 41: Opening The Cable Entries
System Manual 6 Electrical Installation 6.2.3 Opening the Cable Entries Drilling Procedure step 1 Locate the cable entry at the bottom of the inverter. For example, the location of the DC cable entry is shown as A in the following figure. step 2 Drill holes on the cover plate at the bottom of the inverter. -
Page 42: Checking The Cables
6 Electrical Installation System Manual 6.2.4 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. 6.2.5 During Connection Make sure the DC cables are correctly routed before connection. •... -
Page 43: Cable Specifications
System Manual 6 Electrical Installation 6.3.2 Cable Specifications Choose cables 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. - Page 44 6 Electrical Installation System Manual DC Connection Area figure 6-1 DC inout n(n≤24) figure 6-2 DC inout n(n＞24) figure 6-3 DC connection area with energy storage system ports Description DC positive cable connection area DC negative cable connection area Energy storage system port Cable Requirements •...
- Page 45 System Manual 6 Electrical Installation 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 Lead the cable into the wiring area through the inlet hole, and mark the cable polarity. step 3 Strip the protective layer of the cable to expose the copper core of the wire with strippers.
- Page 46 6 Electrical Installation System Manual When the aluminum wire is selected, a copper-aluminum adapter terminal is needed as shown below: Name Name Disc spring Copper bus washer Copper-aluminum adapter Flat washer terminal Bolt Fasten the bolts with screwdriver or spanner. •...
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Page 47: Ac Connection
System Manual 6 Electrical Installation AC Connection 6.5.1 Safety Notices Incorrect AC connection may cause damages to the module. Electrical shock hazards! • Do not touch the live components. • Disconnect the AC switches and ensure all terminals are voltage-free. •... -
Page 48: Ac Connection Area At The Bottom
6 Electrical Installation System Manual AC Connection Area Connection Steps Connect the copper bus to the the transformer side by using M12×55 bolts,and the torque is 60~70N.m/531~619.1lbf.inch. Name Name Copper bus Spring washer Copper bar of the transformer Flat washer Bolt 6.5.3 AC Connection Area at the Bottom Preparation before Wiring... - Page 49 System Manual 6 Electrical Installation Strictly observe the direction of the copper bar, refer to "figure 6-4 Wiring copper bar". Fix the AC connection box with the inverter cabinet, tighten with the bolt : M5x12, and the tightening torque: 6~8N.m/53~70lbf.inch. AC Connection Area After fixing, wiring can be performed.
- Page 50 6 Electrical Installation System Manual • Fasten the wiring terminal with the bolts in the scope of delivery. And the torques are shown in following table. Bolt Torque M12×55 60~70N.m/531~619.1lbf.inch step 1 Make sure the switch of downstream device 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.
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Page 51: Communication Connection
System Manual 6 Electrical Installation Communication Connection The communication terminals are located in lower part of the inverter, as shown in the figure below. Description RS485 communication port Ethernet port On site, perform cable connection according to internal terminal markings. Ground Connection Overview Generally, the ground connection includes equipotential connection of internal devices and... -
Page 52: Finishing Electrical Connection
Any installations not following the standards or the installation and alternation without permission may lead to safety incidents or damage to the devices. Sungrow shall hold no liability for the damages caused. Finishing Electrical Connection After the electrical connection, check the connection of all cables for correctness and firmness. - Page 53 System Manual 6 Electrical Installation • 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 protective grid removed. •...
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Page 54: Closing The Inverter Door
6 Electrical Installation System Manual Installing the L-shaped Angle Steel If the foundation is uneven and the AC connection box is not fixed on the foundation smoothly, it can be improved by adjusting the height of the four L- shaped angles. Closing the Inverter Door step 1 Lift the limit rod and close the cabinet door when the stud leaves the gourd hole(shown as It is strictly forbidden to close the door forcefully without lifting the limit rod. -
Page 55: Commissioning
Commissioning Safety Instructions High voltage! Electric shock! • Wear proper protection equipment before all operations on the device. • Do not touch the live terminals or conductors. • Respect all safety instructions attached on the device and described in this manual. -
Page 56: Checking Before Commissioning
7 Commissioning System Manual • Ensure all the cables are connected securely and all bolts are fixed properly. • Ensure DC side voltage meets module requirements and the polarity is correct. • Ensure AC side voltage meets module requirements. • Ensure all cable connections meets related standards and requirements. -
Page 57: Checking Grid Voltage
System Manual 7 Commissioning To ensure the system reliability and device operation, PV cells on the DC side of the inverter should be from the same manufacturer andnumbers of PV cells in each string should be the same. Check the PV arrays before grid-connection. The voltage of each DC main cable should be the same and no more than the max. -
Page 58: Lcd Parameter Setting
7 Commissioning System Manual • Recheck to ensure the inverter and switches upstream and downstream meet the requirements and are flexible enough. LCD Parameter Setting When the LCD is on, set the LCD display language, date and time, communication parameters, and active power limitation, etc. You can also view the inverter running information and perform pertinent operation. -
Page 59: Starting/Stopping
Starting/Stopping Starting 8.1.1 Inspection before starting After the maintenance or service work, inspect the following items, and then start inverter: • All connections are performed in strict accordance with relevant manual and circuit diagram. • The coverings of the internal devices are fixed and secured. •... -
Page 60: Stopping
8 Starting/Stopping System Manual After startup, the MV Station will automatically check if parameters of the DC and AC side meet the grid-connection requirements. If so and the set time have been reached, the MV Station will turn to the OPERATION mode and feed the generated AC current to the grid. •... - Page 61 System Manual 8 Starting/Stopping step 4 Check to make sure the QF1 and QF2 AC circuit breakers are disconnected. step 5 Disconnect the switches of the MV transformer. step 6 Disconnect the switches of the PV combiner boxes. step 7 MV Station stops running. - - End Specific switch position，refer to "figure 3-1 DC cabinet"and"figure 3-2 AC...
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Page 62: Lcd Menu Operation
LCD Menu Operation LCD TouchScreen The eye-level LCD touchscreen inside the monitoring window on the front side of the inverter is used by the user to view data and set parameters. For user convenience, there are a large number of pictures of the LCD interface are provided in this chapter. -
Page 63: Backlight And Screensaver
LCD screen contains lots of parameters pertinent to the inverter operation. All parameters must be set by appointed personnel. Do not modify any parameters without full understanding of the relevant action or without consulting Sungrow Customer Support. 9.2.3 Backlight and Screensaver If no operation has been performed on the screen for more than 5 minutes, the backlight will go off. -
Page 64: Layout Of The Submenus
9 LCD Menu Operation System Manual First sub- Main Menu Second sub-menu Third sub-menu menu Stop Language & Firmware Ver. Time Sys-parameter Remote/Local control E-adjust Load default Set- Run-parameter parameter Pro-parameter Address Com-parameter Serial port param Network param 9.3.2 Layout of the submenus The layout of submenus is the same as that shown below except for the default menu. -
Page 65: Entering Password
System Manual 9 LCD Menu Operation Entering Password Inverter parameters are protected by password. User can enter into the “Set-parameter” sub-menu only after entering the correct password. Proceed as follows to enter the password: step 1 Tap “Function” from the default menu. step 2 Tap “Set-parameter”... -
Page 66: Language Setting
9 LCD Menu Operation System Manual - - End Language Setting 9.5.1 Conventional Way 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 “Language & Firmware Ver.” and enter into the language and firmware version sub- menu. -
Page 67: Checking Running Information
System Manual 9 LCD Menu Operation - - End Checking Running Information Running information related to the operation of the inverter: Real-time data The real time running information of the 4 modules can be checked. The output power, DC voltage & current, power factor, reactive power, efficiency, daily/ monthly/annual power yields, internal temperature, positive/negative insulation resistance to the ground, running time, amount of CO reduction, grid frequency, AC phase/line voltage,... -
Page 68: Checking History Data
9 LCD Menu Operation System Manual - - End 9.8.2 Checking History Data System can record the inverter running information for the latest 90 days with the records updated every 15 minutes per day. History data displays the data related to the power yields and the electric quantity of the inverter. -
Page 69: Starting/Stopping
System Manual 9 LCD Menu Operation There may be one or more faults occur in the inverter units inside the inverter at the same time, and the fault can be viewed on the LCD screen. Follow the description in this chapter to view the fault information when the faults occur. -
Page 70: Checking Firmware Version
9 LCD Menu Operation System Manual step 3 Tap “Sys-parameter” after entering the correct password. step 4 Tap “Load default” and the password inputting window appears. Tap “Load default” and the password entering window appears. - - End 9.12 Checking Firmware Version User can view the firmware version of LCD and DSP as follows: step 1 Tap “Function”... -
Page 71: Running Parameters
System Manual 9 LCD Menu Operation • Set parameter from the Serial Port Parameter interface for baud. • Set parameter from the Network Parameter interface for IP address, subnet mask,etc. - - End 9.13.2 Running Parameters Setting Running Parameters step 1 Tap “Function” from the default menu. step 2 Tap “Set-parameter”. -
Page 72: Main Functions
10 Main Functions 10.1 Operation Mode 10.1.1 Mode Change After being energized, the inverter will switch among different modes as shown in the figure below. Upv is the DC input voltage of the inverter. UpvStart is the DC side startup voltage of the inverter. 10.1.2 Operation Mode Description Stop This is the initial state of the inverter. - Page 73 System Manual 10 Main Functions Startup This is the transient process between the Initial Standby mode and the Run mode. Once the Startup mode is activated, the inverter will start feeding power to the grid. In this mode, the inverter converts the DC energy into AC energy and feeds it to the grid by way of MPPT.
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Page 74: Active 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. -
Page 75: Low Voltage Ride Through (Lvrt)
Improper parameter configuration may affect the normal operation of the inverter! Only authorized personnel can configure these parameters. Should any question or doubt occurs, contact Sungrow. 10.4 Low Voltage Ride Through (LVRT) Technical Requirements for Connecting Photovoltaic Power Station to Power System requires medium-and-large PV plant should be equipped with Low Voltage Ride Through (- LVRT) ability. -
Page 76: High Voltage Ride Through (Hvrt)
Upu is the grid-connection point nominal voltage. figure 10-1 Low voltage withstand requirements Note: T1, T2, U1, and U2 are all settable parameters. Sungrow’s inverter meets the abovementioned requirements. 10.5 High Voltage Ride Through (HVRT) Technical Requirements for Connecting Photovoltaic Power Station to Power System requires that the PV plant can operate as required within certain voltage range. -
Page 77: Mppt
10 Main Functions figure 10-2 High voltage withstand requirements Note: T1, T2, U1, and U2 are all settable parameters. Sungrow’s inverter meets the abovementioned requirements. 10.6 MPPT Maximum Power Point Tracking (MPPT) is a technique that the inverter uses to get the maximum power from the PV arrays. -
Page 78: Insulation Monitoring Function
Sungrow’s inverter is equipped with insulation resistance monitoring function to detect the system insulation resistance in real time. If low resistance is detected, it will send alarm at the first time to remind the user and prevent potential hazards. -
Page 79: Frequency Anomaly Protection
System Manual 10 Main Functions 10.9.3 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. 10.9.4 Islanding Protection Islanding is a case that can occur if the utility grid is disconnected while the inverter is operating and the local load of the inverter is similar to the present output power. -
Page 80: Troubleshooting
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 and void all warranty from Sungrow. -
Page 81: Fault And Troubleshooting On The Inverter
System Manual 11 Troubleshooting If there is any questions or doubts that are not covered by this manual, contact us. With the following information provided, Sungrow shall diagnose and solve the problem more easily: • Type and serial number of the inverter and internal devices •... - Page 82 11 Troubleshooting System Manual Fault Fault Explanation Measures severity name 1. Check, with a thermodetector, whether the present ambient temperature is within the permissible range of the module. The reactor 2. Check that the air inlets of the inverter L over- temperature is Major and inverter are not obstructed.
- Page 83 System Manual 11 Troubleshooting Fault Fault Explanation Measures severity name 1. Ensure the ambient temperature. Check, with a thermodetector, whether The fault occurs the present ambient temperature is within when the the permissible range of the module. temperature at 2. Check that the air inlets of the inverter Temp-flt Major the air inlet is...
- Page 84 11 Troubleshooting System Manual Fault Fault Explanation Measures severity name Grid blackout 1. Check whether the grid is normal. occurs or AC 2. Check whether power outage occurs lsland/No transient voltage Major on the AC side. grid exceeds the 3. Check whether the AC circuit breakers protective of the module are connected.
- Page 85 System Manual 11 Troubleshooting Fault Fault Explanation Measures severity name The state window of the SPD is as follows: 1. When the window colour is turned red from green, it indicates that the SPD is damaged (perhaps, due to The SPD on the thunderstorms).
- Page 86 11 Troubleshooting System Manual Fault Fault Explanation Measures severity name Polarity on the PV pol- Check whether the polarity on the DC of Major DC input side is the module is correct. reserved. Interior hardware Measure the DC voltage of the inverter, to Hardwar- of the module is Major...
- Page 87 System Manual 11 Troubleshooting Fault Fault Explanation Measures severity name 1. Check the DC cables. Check whether positive DC cables connected to the ground are damaged. Check whether the impedance to ground of the DC cable is normal. Grounding fault. Major Gnd-flt 2.
- Page 88 11 Troubleshooting System Manual Fault Fault Explanation Measures severity name Current2 Unbalan- Measure the grid voltage, to check ced/ AC current Major whether phase loss occurs. Current3 unbalance Unbalan- AC switch is Manually start the inverter after which the Major switch disconnected.
- Page 89 Check whether the DC fuse have blown. DC fuses of the DC fuse- inverter are Minor If so, contact Sungrow and replace the abnormal abnormal. fuses. Branch fuses of Branch Refer to the measures for "DC fuse-...
- Page 90 Y type, ensure that the protective neutral point is unconnected. threshold. If the fault still exists, contact Sungrow Service. If the following fault occurs, immediately contact Sungrow Service. (referred to as "Sungrow" hereinafter). Fault Explanation Fault name...
- Page 91 System Manual 11 Troubleshooting Fault Explanation Fault name Measures severity Internal Major Contact Sungrow. Com-Failure communication of the inverter is abnormal Addresses of the Encoding interior modules are Major Contact Sungrow. repeat repeated. Backfeed Reverse charging Major Contact Sungrow. Supply fault device is out of service.
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Page 92: Other Fault And Troubleshooting
Refer to the converters are matched. "Measures". Communicate again after replacing the converter. The monitor software is installed incorrectly. It is recommended to reinstall the software. If all the above-mentioned items are correct and this fault continues, contact Sungrow. -
Page 93: Routine Maintenance
12 Routine Maintenance 12.1 Overview For maintenance items beyond this manual, please confirm with SUNGROW or contact SUNGROW for maintenance, and unauthorized operation is strictly prohibited. 12.2 Safety Instructions Due to ambient temperature, humidity, dust, and vibration, the inverter and the internal components will age and wear. -
Page 94: Maintenance
• Cover the adjacent electrical components with insulation cloth during operation. 12.3 Maintenance 12.3.1 Overview For maintenance items beyond this manual, please confirm with SUNGROW or contact SUNGROW for maintenance, and unauthorized operation is strictly prohibited. 12.3.2 Introduction The inverter can be installed outdoors. Harsh environmental condition or long-time operation, however, may cause aging and damage to the inverter. - Page 95 Make sure all bolts are securely fixed. Repair immediately any anomalies found during routine maintenance. If there are any doubts, contact Sungrow. Maintenance (once every two years) Check item...
- Page 96 12 Routine Maintenance System Manual Check item Check method Check whether the shield ground wires are in good Shield ground wires contact with the insulating sleeves and ground copper bars. Check whether the splice box and the Ethernet switch Connection between splice box are correctly connected.
- Page 97 System Manual 12 Routine Maintenance Check item Check method 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 routed and without short circuit. Make corrections if case of any anomaly.
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Page 98: Cleaning The Inverter
12 Routine Maintenance System Manual Check item Check method • Check whether the circuit board and components are clean. • Check the temperature and cleanness of the radiator. Module cleanness If necessary, clean the radiator with a vacuum. • If necessary, replace the filter. Note: Check the ventilation performance of the air inlet. -
Page 99: Cleaning Interval
System Manual 12 Routine Maintenance 12.4.2 Cleaning Interval The cleaning interval of the inverter depends on the operation conditions of the inverter, for example, the weather condition and etc. It is necessary to make sure the inverter exterior and interior areas are clean. If the operation conditions are severe, in desert area for instance, the cleaning interval shall be shorter. -
Page 100: Cleaning The Surface Of The Inverter
12 Routine Maintenance System Manual Procedure Unscrew the bolts at the bottom of the inverter, to remove the bottom plate. Remove the filter screen, clean them, and reassemble them when they are dry. Replace the filter screen if there is any damage. Further Processing After cleaning and replacement, reinstall the bottom plate and secure it with bolts. - Page 101 System Manual 12 Routine Maintenance • Water • Alcohol or other non-corrosiveness detergent Figure Step 1. Clean the smudginess on the surface by using a rag (or other cleaning tool) with water 2. If the smudginess cannot be cleaned by water, use 97% alcohol until the surface is clean enough to accept.
- Page 102 12 Routine Maintenance System Manual Figure Step 1. Polish the rough paint surface or the scratched parts by abrasive paper until the surface is smooth 2. Clean the target parts by rag with water or use 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...
- Page 103 System Manual 12 Routine Maintenance • Paint RAL7035 / Munsell color JN-82 N8.2 Figure Step 1. Polish the damaged parts of the paint to remove the surface rust or other roughness 2. Clean the target parts by rag with water or use 97% alcohol to clean the surface dust and dirty 3.
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Page 104: Replacing The Electrical Components
Sungrow. If the components needs 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 and void all warranty from Sungrow. - Page 105 System Manual 12 Routine Maintenance step 4 Disconnect the DC load break switch, disconnect AC and DC maintenance switch, and perform Step 5 about 5 minutes later when the capacitor inside the machine discharges completely. step 5 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.
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Page 106: Appendix
13 Appendix 13.1 System Parameters Input (DC) SG3600UD SG3425UD Max. PV input voltage 1500V Min. PV input voltage 875V 915V Startup input voltage 955V 915V MPP voltage range 915~1300V 875~1300V No. of independent MPP inputs 20 (optional: 22 / 24 / 26 / 28) No. -
Page 107: Tightening Torques
System Manual 13 Appendix AC output protection Circuit breaker Surge protection DC Type II / AC Type II Grid monitoring Ground fault monitoring Zone monitoring Insulation monitoring Overheat protection Q at night Optional General Data 2280 x 2280 x 1600 mm Dimensions (W x H x D) 89.8''*89.8''*63'' 3200 kg... -
Page 108: Exclusion Of Liability
• 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 Supply Co., Ltd. assumes no liability for direct or indirect damages arising from the use of Software. - Page 109 System Manual 13 Appendix • Model of the device • Serial number of the device • Fault code/name • Brief description of the problem For detailed contact information, please visit: https://en.sungrowpower.com/contactUS.
- Page 110 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...