SunBox PVS-12M-DB/PVS-16M-DB PV Array Combiner Box User Manual

Transcription

1 SunBox PVS-12M-DB/PVS-16M-DB PV Array Combiner Box User Manual PVS-12M_16M-DB-V11-UEN

2

3 Contents 1 About This Manual Contents Target Readers How to Use this Manual Symbol Explanation Safety Instructions Product Description System introduction Identifying the PVS Fuse rating DC switch rating Installation Guide Checking before installation Mechanical installation Dimensions Installation site requirements Installation Method Electrical installation Internal structure Water-proof terminals and wirings Wiring preparations Input wiring and connections Output wiring and connections Ground wiring and connections Communication Connections Bottom wirings Communication address settings Start/Stop of operation Commissioning...31

4 6 Routine Maintenance Troubleshooting Before troubleshooting Common faults and troubleshooting Appendix Technical data Cable requirements Quality Assurance About us... 40

5 1 About This Manual 1.1 Contents Safety instructions Safety instructions for the installation, operation, commissioning and maintenance of PVS. Product description Location of PVS in the PV system, structure, function and classification. Installation guide The installation methods and electrical connections of PVS. Routine maintenance How to replace the fuses of PVS. Others Technical data of PVS, exclusion of liability and the way to contact us. 1.2 Target Readers This manual is for users who operate the PVS or conduct the maintenance work. The operators must be trained and qualified personnel. 1.3 How to Use this Manual Read this manual and other related documents before installation of the PVS. Documents must be stored in a convenient place for future reference. The contents of the manual will be periodically updated or revised due to the product development. It is probably that there are changes of manual in the subsequent converter edition. 1

6 1 About This Manual User Manual 1.4 Symbol Explanation This manual contains important safety and operational instructions that must be accurately understood and followed during the installation and maintenance of the equipment. To ensure optimum use of this manual, note the following explanations of symbols used. DANGER indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury. WARNING indicates a hazard with a medium level of risk which, if not avoided, will result in death or serious injury. CAUTION indicates a hazard with a low level of risk which, if not avoided, will result in minor or moderate injury. NOTICE indicates a situation which, if not avoided, will result in equipment malfunction or property damage. NOTE indicates additional information, emphasized contents or tips to help you solve problems or save time. 2

7 User Manual 1 About This Manual The following symbols on the device enclosure must be paid attention to. Symbol Explanation Lethal voltage inside! Do not touch! Hot surface! Do not touch the hot surface of the device. Protective earth. Earthing securely to ensure personal safety. Warning! Potential hazards! Look over the user manual before any operation on the PVS 3

8 2 Safety Instructions This chapter describes some important safety instructions about SunBox PVS. Please read the manual carefully before installation. If any device damage occurs when ignoring the safety instructions, our company has the right to exclude all warranty claims. Lethal Voltage! Death resulting from burning and electric shock upon touching the live components of the PVS. Disconnect the end connection of the PV string before cable connection; Observe all safety instructions required by the PV cell manufacturer. Device damage or system fault may cause fire and electric shock! Optical check the device for any possible damages or dangerous states before operation. Check if other external devices or circuit connection are in safe state. Work on the device only when it is safe to do so. Death or burning hazard by touching the internal terminals of the device! Do not touch the terminals or conductors in contact to the inverter or PV string. Observe all the instructions and safety regulations related to PVS connection. 4

9 User Manual 2 Safety Instructions High voltage is present inside the device! Follow all the warning signs in the device. Respect all the safety instructions in this manual and other documents. The ground cable must be grounded properly, otherwise, lethal electric shock happens to the operator or installer once a fault occurs. device may be damaged after lightening stroke. Incorrect cable connection may cause damages to the PV cells, combiner box and inverter. Respect the following instructions during cable connection: Connect by strictly following the circuit diagram; Measure and make sure the string open-circuit voltage meets the requirements of the combiner box before inserting the fuse; Identify the positive pole and negative pole before connection. Only qualified personnel or professional electrician can perform the operation and wiring described in this manual. All operations and wirings must in full accordance with the national and local standards and requirements. All warning marks and labels must be clear and intact. Replace them if any damages are found. 5

10 2 Safety Instructions User Manual Make sure the terminals are firmly connected during wiring. If the cable copper core and the terminals are not connected firmly, terminals will be over-heating and burnt. Anti-flaming cables with multi-strand are advisable and the cable cross-sectional area should be no less than the recommended value. The nuts of the water-proof terminals must be firmly screwed to prevent water leakage and PVS damages. Pull the fuse out of the fuse holder for personal and device safety. Watch out during fuse replacement. Do not touch the fuse with bare hands. Do not bring any metallic materials during fuse replacement. Replace only one fuse at one time. Once the one fuse is replaced, check to make sure the new one is installed firmly and then replace the next one. The fuse is under high voltage both from the inverter and the PV array. Do not touch the fuse during device operation. Disconnect the DC circuit breaker before checking or replacing the fuse. Notice that all terminals of the DC circuit breaker contain high voltage. Measure by using proper tools that the current of each input is zero before replacing the fuse. Lock the cabinet door and seal the water-proof cover of the lock core after operation. In rooftop horizontal installation site, fix the auxiliary protection set of the cabinet with bolts. Do not open the cabinet door frequently. 6

11 User Manual 2 Safety Instructions Touching or improper operation on the PCB or other sensitive components may damage the device. Do not touch any parts inside the cabinet other than the connection terminals. Respect all ESD related safety regulations and wear antistatic wrist strap. 7

12 3 Product Description 3.1 System introduction For a large-scale grid-connected PV system, it is widespread to install a DC combining device between PV modules and inverters to minimize cable connections, facilitate maintenance and enhance reliability. Our SunBox PVS combiner box series (PVS) are designed for meeting these requirements, which provides a turnkey solution for PV plant systems. Considering different types of PVS, a certain number of PV strings can be connected to the input side of PVS. After combining work done, at the output side, there will be one DC+ and one DC- main line. By using of surge protection device (SPD) and DC switch, the output can be connected to inverters directly. The PV generation system including a PVS is shown in Fig Fig. 3-1 Composition of PV generation system Tab. 3-1 Device in Fig. 3-1 No. Device A PV arrays B SunBox PVS-12M-DB/PVS-16M-DB combiner box C Inverter D Data acquisition device E Environment monitoring device F Grid 8

13 User Manual 3 Product Description For PVS-12M-DB, up to 12 PV strings can be connected to the input side. And for PVS-16M-DB, up to 16 PV strings can be connected to the input side. PVS has the following features: Meet outdoor installation requirement Connect to multiple PV inputs with fuse for each input (can be replaced to other degree) PV-specific high voltage SPD equipped, lightening protection function for positive and negative pole Quadrupole switch with positive and negative pole in parallel connection to improve DC voltage-withstand value Current sensor inside to monitor the current of each string; the monitored information can be displayed by the LED or sent by RS485 Monitor busbar voltage and the monitored information can be displayed by the LED and sent by RS Identifying the PVS PVS-16M-DB is shown in the following picture D C G H B E F I A No. Name Description A Lockhole - B INPUT DC+ Positive pole of DC input (unused terminals must be sealed) 9

14 3 Product Description User Manual No. Name Description C INPUT DC- Negative pole of DC input (unused terminals must be sealed) D MONITOR Monitoring input and output E OUTPUT DC+ Positive pole of DC output F OUTPUT DC- Negative pole of DC output G Ground terminal Equivalent potential connection terminal H Ingress-protected air valve I Fixing hanger Allow fixing of combiner 3.3 Fuse rating In power system, fuses are used for over-current protection. Choosing right-rating fuses is very important to ensure safety operation. The minimum current rating of a fuse can be calculated with short circuit current (Isc) of PV arrays. Except for some special needs, the recommended rating would be 1.56 Isc. Users can calculate fuse rating easily. If maximum current of PV arrays=7a, and DC voltage range of PV arrays=200~1000v, then the fuse rating will be 1000V/(1.56 7A). 3.4 DC switch rating The DC voltage of the switch is decided by the nameplate. For example, from the nameplate it can be seen that the maximum DC voltage of the PV array is 1000V, i.e. DC switch s withstanding-voltage is at least 1000V. DC switch this product is equipped meets the required withstanding-voltage degree. 10

15 4 Installation Guide 4.1 Checking before installation The delivery content of the combiner box is shown below: PV array combiner box User Manual Warranty card Certificate card Test report Check the completeness of the delivery according to the package list inside the crate. 11

16 680mm 730mm 4 Installation Guide User Manual 4.2 Mechanical installation Dimensions 184mm 820mm 720mm Fig. 4-1 Dimensions of PVS Pictures in this manual are indicative only! The real product you receive may differ Installation site requirements With IP65 protection degree, the PVS can be installed outdoors. Please meet the following requirements: Dimensions and weight of PVS should be considered sufficiently). Ambient temperature -40 ~+60 ; Relative humidity 0~99%. Installation site should be as close as possible to PV arrays for minimum cables and wires usage. Installation site should be safe venting. PVS must be installed vertically, including following two types: Wall-hung type: Fix the PVS onto a wall (recommended). Pillar-mounted type: Fix the PVS onto a pillar. 12

17 User Manual 4 Installation Guide Never install the device in direct sunlight to guarantee optimal performance. For big PV plants, it is suggested that the device is installed on the back side of PV arrays. For better heat dissipation and convenient maintenance, enough space must be maintained around the PVS. For large-scale PV plant, install the PVS on the back of the PV cell installation bracket Humidity during installation may damage the PVS. Do not install the PVS during rainy or humidity days. Screw the water-proof terminals tightly to prevent moisture penetration no matter the installation is vertically or horizontally. Seal the unused terminals after cable connection. Cover the water-proof lock core. Fix the lock protection device and the device cabinet tightly by screws when PVS is installed in rooftop horizontally. PVS is equipped with plastic buckle on the cabinet before delivery. The plastic buckle is functioned as a buffer to prevent the sealing strip from scratches and damages. Before installing the PVS, please proceed as follows to remove the plastic buckle. If this plastic buckle is missing during transport, the normal function of the PVS is not affected. 13

18 4 Installation Guide User Manual Installation Method PVS has two installation methods: vertical installation and horizontal installation. Solution 1: Horizontal installation Horizontal installation is applied to distributed PV plant and on rooftop. Horizontal installation steps Step 1 Measure the distances of the hangers of the PVS and mark positions on the installation surface. 770mm 460mm Step 2 Fix the PVS to the surface according to the sequence of bolt, PVS hangers, fix surface, flat washer, spring washer and nut. Torque:18N.m Solution 2: Vertical installation Vertical installation is applied to PV ground plant. PVS is installed in the shadow place of the PV cells. Wall mounted or column mounted method can be adopted. Install PVS upside down is strictly forbidden. Wall-mounted: fix PVS to the PV array s installation frame through the mounting holes of the PVS by 4 M10 30 bolts Column-mounted: use hold hoop and steel angle as fixture to fix to the support column. fix PVS to the steel angle through the mounting holes of the PVS by 4 M10 30 bolts Installation steps: Step 1 Measure the distances of the hangers of the PVS. 14

19 User Manual 4 Installation Guide 770mm 460mm Step 2 Mark positions according to the distances measured on the installation surface and then drill holes. Mark the positions Drill the holes Step 3 Fix the PVS to the surface according to the sequence of bolt, PVS hangers, installation surface, flat washer, spring washer and nut. Torque:18N.m. 4X 15

20 4 Installation Guide User Manual Column-mounted steps: Step 1 The dimensions of the installation holes on the PV cell frame should meet the requirements in Fig Fig. 4-2 Drill holes (unit in mm) Step 2 As shown in Fig. 4-3, install PVS by hexagon nut and hexagon bolt. From left to right: bolt, PVS hangers, support, flat washer, spring washer and nut. Torque: 18N.m. 4X Fig. 4-3 Installation of PVS Step 3 Check to ensure PVS is installed correctly and securely. PVS can also be installed for roof application. Observe all the instructions in this manual and relevant documents. 16

21 User Manual 4 Installation Guide 4.3 Electrical installation Internal structure The internal structure of the PVS is shown below (take PVS-16M-DB for example): I H N G J K L M E F B A C D No. A B C D E F G H I J K L M N Description DC negative pole fuse and fuse box; DC positive pole fuse and fuse box. Ground terminal RS485 ports. Output of DC positive pole Output of DC negative pole DC switch SPD Power board LED display (can display current, baud rate and communication address) Dip switch (setting communication address) Protocol switch (setting communication protocol) Push switch (switch between current and communication parameter) Indicators, from left to right: TX: transmitted communication data signal indicator; RX: received communication data signal indicator; RUN: monitoring unit Run status indicator; SPD: surge protection device Fault indicator; CB: DC switch status indicator; PWR: monitoring unit power supply status indicator. 17

22 4 Installation Guide User Manual Pictures above are for orientative information, and some details may not exactly correspond to the product you received. Please prevail in kind Water-proof terminals and wirings Water-proof terminals of PVS are shown in Fig C D A F G E B Fig. 4-4 Size and type of water-proof terminals No. Label Description Model Cabel OD Negative pole input A INPUT DCwaterproof terminal M24 4mm~6mm Positive pole input B INPUT DC+ waterproof terminal Communication input C Monitor Input waterproof terminal 5mm~10mm Communication output D Monitor Output PG-11 waterproof terminal Grounding waterproof E 5mm~10mm terminal Positive pole output F Output DC+ waterproof terminal PG mm~40mm Negative pole output G Output DCwaterproof terminal Note1: Idle waterproof terminal not actually used shall be blocked inside the box using fireproof mud. Note2: You can connect two positive (negative) input cables to one water-proof terminal according to on-site need. You can also connect one positive and one negative input cable to one water-proof terminal in special situation. 18

23 User Manual 4 Installation Guide Wiring preparations Step 1 Open the door A Step Operation (1) Insert key (1) (2) (3) (4) (2) Turn the key to vertical direction (3) Remove key (4) Pull down the metal buckle ( A in above figure) Step 2 Remove the protection cover. Step 3 Turn the switch to OFF position. ON OFF Step 4 Remove fuse. 19

24 4 Installation Guide User Manual Input wiring and connections High voltage is present inside the device! Follow all the warning signs in the device. Respect all the safety instructions in this manual and other documents. Incorrect cable connection may cause damages to the PV cells, combiner box and inverter. Respect the following instructions during cable connection: Connect by strictly following the circuit diagram; Measure and make sure the string open-circuit voltage meets the requirements of the combiner box before inserting the fuse; Identify the positive pole and negative pole before connection. Step 1 Loosen the union nut of water-proof terminals. Step 2 Insert the PV1+ cable through terminals of positive input area, and connect the cable to the PV1+ terminal inside the device. Enough wire bending space should be ensured. A B No. Description A Cable (e.g. PV1+, PV2+ PV1-, PV2- etc.) B Conduit Step 3 Strip off both protective and insulating layers with the help of a hand 20

25 User Manual 4 Installation Guide crimping pliers. Step 4 Select proper terminal to the corresponding cable. For example, LT040010, 16 stands for 6 mm 2, the cross-sectional area of the crimping cable; the length of the crimping tube, see the following figure. 13mm 6mm 2 Cable Cross-section Terminal type Stripped length (mm) Force(N) 2.5mm 2 LT ± mm 2 LT ± mm 2 LT ± mm 2 LT ± mm 2 LT ± Step 5 Stripped off the cable insulation layer, using wire stripper, to reveal the copper core, length as specified in above table. Notice: Do not break the copper wire during stripping. Step 6 Crimp the cable. Insert the stripped cable into the terminal. Crimp the cable using special tool (mouth of the crimping plier should match the cable cross section), see the following figure. Step 7 As shown in the following figure, connect the terminal to the corresponding terminal of the combiner box. Notice: press the bolt to the side with indentation during fixation. Make sure the terminal is inserted into the combiner box as much as possible. Step 8 Wiring: Press fit the cable with insulation layer stripped on the terminal at bottom of the fuse box Insert the cable. Loosen the terminal. Tighten the terminal. 21

26 4 Installation Guide User Manual Step 9 Follow the same procedure to connect rest cables. Comb all the input cables together with cable ties and firm them onto the cable support bar. Appropriate cable bending space shall be ensured. Fig. 4-5 Diagram of cabling route Output wiring and connections Step 1 Lift the protective cover upwards. Then loosen the nut from water-proof terminals. Step 2 Insert the DC+ cable through DC Output (+) terminal. Enough cable bending space should be ensured. Step 3 Strip off both protective and insulating layers with the help of a hand crimping pliers. The length of cable conductor shall be approx. 35mm. 35mm Step 4 Connect cable conductor to certain DT terminal. For cable cross-sectional area, please refer to 8.2 Cable requirements. Step 5 Insert the DT terminal, and tighten the nut by using an inner hexagon spanner. Firm cable onto the cable support bar. Appropriate cable bending space shall be ensured. 22

27 User Manual 4 Installation Guide Use hexagon spanner to remove the nut; 2. Insert DT terminal into the output terminal; 3. Use hexagon spanner to tighten the nut. Step 6 Screw the bolt of the water-proof terminal tight clockwise. Step 7 Connect cable DC- to DC Output (-) following the procedures above. Output wiring and connections have been finished. Step 8 Lay the cables connected the combiner box and external devices in the cable trench for easy installation and maintenance. Cable trenches are designed and constructed in accordance to related regulations and the number & dimensions of the devices. Step 9 Lay the combiner box positive and negative pole output cables, communication cables in different layer of the support arm in the cable trench to avoid short circuit caused by cable insulation layer cracks. See the following picture; user can design the number of supporting arms as per reality. B C D A No. A B C D Name Cable trench Positive output cable supporting arm Negative output cable supporting arm Communication cable support arm Cable trenches Note: pictures here is indicative only, user can make adjustment according to real needs. 23

28 4 Installation Guide User Manual Make sure that the nuts have been screwed into place. If the cable conductor has not been connected firmly, long-time work may burn the terminal. Stranded flame-retarded copper wire shall be used, and its size shall be over the recommended value as described in Nuts of water-proof terminals must be screwed correctly and firmly. Otherwise, water leakage can damage the PVS Ground wiring and connections Ground cables shall be connected correctly and firmly. Otherwise: The electric shock caused by a malfunction can lead to lethal damage. The device can be damaged when lightning. Relevant standards must be observed. Ground cables must be connected firmly with both device and ground terminals. Ground resistance shall be measured after finishing ground connections, and the measured values should not be over 1Ω. Step 1 Loosen the union nuts of water-proof terminals. Step 2 Insert the green-yellow wire from the device outside into the water-proof terminal, then pull the wire and connect it to the inner terminal. Enough wire bending space should be ensured. Step 3 Strip off both protection and insulation layers, with approx. 12mm conductor length. Step 4 Loosen the tightening bolt of screwdriver. terminal with the help of a Step 5 Insert ground cable through the opening and screw the tightening bolts tightly. Firm the cable onto the cable support bar and enough cable bending space shall be ensured. Step 6 Tighten the nuts of water-proof terminal clockwise. Ground wirings have been finished. 24

29 User Manual 4 Installation Guide Communication Connections Refer to the figure below for communication terminals inside the combiner box. Upper layer:a1,b1,fg Lower layer:a2,b2,fg Fig. 4-6 Communication connection Upper terminal connects to input and lower terminal connects to output. User may adjust according to real need. Step 2 Unscrew the water-proof terminals Monitor Input and Monitor Output. Step 3 Pull the communication cable inside the PVS through the water-proof terminals. Step 4 Strip off the cables protection layer and the insulation layer until the copper core is 8mm outside. Step 5 Insert the screwdriver inside the input cable terminal holes. Pull the screwdriver until the leaf spring is bounced completely. Step 6 Insert wires into bottom of wiring holes A1, B1, and FG. Among them: Connect communication cable RS485-A to A1; Connect communication cable RS485-B to B1; Connect communication cable shielding layer to terminal FG. Step 7 Loosen the screwdriver to let the leaf spring connect to the cable. Step 8 Follow the same steps to connect the output cables to the FG, A2 and B2 to finish the communication terminal connection. 25

30 SolarInfo 4 Installation Guide User Manual Communication cable must be shielded twisted pair cable. Communication unstable or communication failure may follow if otherwise. Communication cable should be far away from the high voltage cable. Place the communication cables and power cables in parallel or strap them together is strictly forbidden. Communication interface or device damage if otherwise. If not prevented, lead the communication cable through galvanized tube for shielding. Communication solution The communication method of PVS is shown below: PVS 1 PVS 2 PVS n A1 B1 A2 B2 A1 B1 A2 B2 A1 B1 A2 B2 RS485A RS485B Monitor PC SolarInfo Logger (optional) Fig. 4-7 Communication system connection Connect A1 and B1 of first combiner box to A1 and B1 of data collector; Connect A2 and B2 of first combiner box to A1 and B1 of second combiner box; Connect A2 and B2 of second combiner box to A1 and B1 of third combiner box; 26

31 User Manual 4 Installation Guide And so forth: connect A2 and B2 of previous combiner box to A1 and B1 of next combiner box If the PVS is equipped with optional PV internal power supply, monitor can wok normally when the PV voltage meet the switch power supply s nominal work power supply range Bottom wirings The bottom wirings are described in the following Fig Fig. 4-8 Wiring connection illustration After installation or commissioning, ensure the door and the cover of the key is locked to avoid the water is in. If such a situation occurs, Sungrow takes no responsibility for this. 27

32 4 Installation Guide User Manual 4.4 Communication address settings Communication parameters of combiner boxes can be set and viewed on the monitoring unit, as shown below. A B C D Fig. 4-9 Setting and inquiry of the communication parameters No. Description Funktion A LED indicator Used to display relevant electrical and communication parameters of combiner box. For particular parameter inquiry method, refer to Table 4-1. B Dip switch This switch adopts binary code from right to left, i.e. bits 0-7 of binary address code. For setting method, refer to Table 4-2. Used to switch protocols. The first place switches protocols: C Protocol ON for Modbus protocol; switch OFF for Sungrow protocol The second place is used to set branch connection status. Press push switch K1 to display string or combiner box current voltage and current on the first places of LED D digitron. For method of operation, refer to Table 4-1. Push switch Press push switch K2 to display combiner box K1, K2 communication address, baud rate, and chassis temperature on the LED. For method of operation, refer to Table

33 User Manual 4 Installation Guide Combiner box allows inquiry of communication parameters by push switch. The left switch is K1 and the right switch is K2. Particular definitions: Tab. 4-1 Description of the function of inquiry by push switch (taking 16 lines as an example) Item Description Press A1 to turn screen Display voltage: 700V 1 st current: 10A 2 nd current: 10A Voltage and current display Communication display Ambient temperature display 16 th current: 10A Note: the LED display can be divided into the first two digits and last three digits. The first two digits is used to display the N th input of the PVS; the last three digits are used to display the current of this input. For example: means that the current of the 1 st input is 10A. But when the first two digits are 00, the last three digits are the voltage. For example: means that the present voltage is 700V. Press A2 to turn screen once Press A2 to turn screen twice Communication address A0 007 Baud rate b9600 Ambient temperature C

34 4 Installation Guide User Manual Tab. 4-2 Address-setting examples: Dip-switch settings Binary address Decimal address 1 (1 2 0 =1) ( =2) ( =3) ( =247) If the code is: or , it is deemed Start/Stop of operation PVS runs automatically when power on and stop when power off. User can control the DC output of the PVS manually through the PVS internal DC switch. 30

35 5 Commissioning Check if the PVS can operate normally after installation: Step 1 Connect the connection terminal of each PV string. Step 2 Measure the input voltage of positive pole and negative pole of each input to make sure they are basically same and the positive pole and negative pole are connected correctly. Step 3 Fasten the fuse holder. Step 4 Close circuit breaker; monitoring unit power indicator PWR lights up and status indicator RUN flashes. When push switch K2 is pressed, if there is a value on the LED digitron, the operation is normal. PE NC 485A 485B SPD PV- PV+ +5V GND CB Step 5 Lock the door, remove the key and tighten the key-hole water-proof cover. 31

36 6 Routine Maintenance Due to ambient temperature, relative humidity, windblown dust and vibrations, components of PVS will get aging. It is necessary to do the routine maintenance work periodically on the device. Only qualified electricians can do the maintenance work described in this chapter. After the maintenance work finished, be sure not to leave screws, washers and the like in the PVS. The device can be damaged! Only work on the PVS when it is switched off and voltage free. Fuses are non-resetting once they are broken. After many times replacement, the fuse holders will get loose. Users should fasten the fuse holders periodically to ensure valid connections. Replace the Fuse Fig. 6-1 Replace the fuse 32

37 Tighten the fuse cover after replacing the fuse. Disconnect the DC switch before checking and replacing fuse. Please notice that high voltage still exist in all terminals of the DC switch. Make sure the current of each input is zero by pliers and then replace the fuse. Replace the sealing strip The sealing strip inside the PVS is located in the PVS internal door cover as shown in the following figure. It is advisable to check this sealing strip once every month. If it is damaged by non-human factors, please contact Sungrow immediately to replace the PVS door cover. Sealing strip Door cover 33

38 7 Troubleshooting This chapter gives the basic troubleshooting methods for customer as a reference. 7.1 Before troubleshooting Please notice the following items before troubleshooting: Disconnect the DC switch before operation. Please do not touch the bare metal parts of the copper bar under the protection plate. Pull the fuse holder for maintenance of the combining busbar and to disconnect the input cable. High voltage still exists after DC breaker is switched off. The fuse holders are still live after fuses are removed. 7.2 Common faults and troubleshooting Fault Possible cause Method of correction On the monitoring unit, neither RX nor TX lights up. RS485 communication fault Check communication line. Refer to 4.4 Communication address settings. On the monitoring unit, RX flashes and TX does not light up. Incorrect address Use dip switch to set address again. 34

39 User Manual 7 Troubleshooting Fault Possible cause Method of correction Communication failure sometimes On the monitoring unit, indicator PWR does not light up. Disturbance to communication line No 5V output on switching power supply board Twisted pair shielded cable shall be used, with shielding layer grounded. Install a 120Ω resistor between communication terminals A2 and B2 of the last combiner box. Refer to Communication Connections. Check voltage on monitoring unit +5V plug, which shall be about 5V; otherwise switching power supply board is faulty and please contact us for repair. On the monitoring unit, indicator RUN does not flash. Faulty CPU board Contact us for replacement of the monitoring unit On the monitoring unit, indicator SPD lights up. Current of a branch apparently smaller or larger than current of other branches Display of open circuit fault of a branch Failure of surge protection device Abnormal current No PV string connected to this branch Dropped out cable or molten fuse Replace surge protection device in time Check size of PV strings of this branch for consistency. Check if this branch has shaded PV string. Be referencing section 4.4 Communication address settings, set this branch to unconnected status. Check PV cables for disconnection. Or, replace fuse. 35

40 7 Troubleshooting User Manual The following figure illustrates terminals and layouts of metering board. PE NC 485A 485B SPD PV- PV+ +5V GND CB Tab. 7-1 Description Indicator Meaning TX Transmitted communication data signal indicator RX Received communication data signal indicator RUN Monitoring unit running status indicator SPD Surge protection device fault indicator CB DC switch status indicator PWR Monitoring unit power supply status indicator +5V +5V plug on the monitoring unit If you have any doubt during use of this product, please feel free to contact us. After-sales service telephone: For contact, please provide the following information so that we can provide you with help and service more quickly: Combiner box model Combiner box serial number Brief description of fault information 36

41 8 Appendix 8.1 Technical data Types PVS-12M PVS-16M Max. string number Input current range Refer to nameplate (the value can be changed by replacing fuses) DC voltage range 200Vdc~1000Vdc Communication RS485 Power for communication 2.5W 3W Degree of protection IP65 Ambient temperature range -40 ~+60 Dimensions(W*H*D) 720mm*184mm*680mm Relative humidity 0~99% Weight approx. 40kg 41kg Optional components String monitoring Yes Switch work state monitor Yes Communication port RS485 37

42 8 Appendix User Manual 8.2 Cable requirements Types PVS-12M PVS-16M Type: 6mm 2 Stranded flame-retarded copper wire Input cable Stripped length: 13mm Bolt: M4 Tightening torque: 2.3N.m Type: 120mm 2 Stranded flame-retarded copper wire or Type: 185mm 2 Stranded flame-retarded copper wire or at most 400mm 2 Stranded at most 400mm 2 Stranded Output cable flame-retarded aluminium flame-retarded aluminium wire wire Stripped length: 35mm Stripped length: 35mm Bolt: M12 Bolt: M12 Tightening torque: 14N.m ~31N.m Tightening torque: 14N.m ~31N.m Communication cable Grounding terminals Type: 1.5mm 2 Four core STP with low resistance Stripped length: 7mm Bolt: M3 Tightening torque: 0.6N.m~0.8N.m Type: 16mm 2 Stranded flame-retarded copper wire Stripped length: 15mm Bolt: M6 Tightening torque: 4N.m 8.3 Quality Assurance Where any fault occurs during the warranty period, Sungrow will maintain or replace the product for free. Evidence Sungrow Power Supply Co., Ltd. needs the users to provide the receipt invoice and the date you purchase. Meanwhile the trademark should be clearly legible. Otherwise Sungrow Power Supply Co., Ltd. has the right to exclude liability claims. Conditions The original unqualified product should return to Sungrow. 38

43 User Manual 8 Appendix Users should permit appropriate time to maintenance the device with fault for Sungrow. Exclusion of liability Guarantee or liability claims for damages of any kind are excluded if they are caused by one or more of the following: Improper, inappropriate use or installation of the product Installing or operating the product in an inappropriate environment Installing or operating the product when ignoring relevant safety regulations in the deployment location Ignoring safety warnings and instructions in all documents relevant to the product Installing or operating the product under incorrect safety or protection conditions Altering the product or supplied software without authorization The product malfunctions due to operating attached or neighboring devices beyond permissible limit values. In case of unforeseen calamity or accidents Where fault is caused by any of the above and users have the relevant demand, Sungrow will do the paid maintenance work to the device after judgment. Specifications subject to change without notice. 39

44 8 Appendix User Manual 8.4 About us Sungrow power supply is a china-leading manufacturer of various power electronics products for renewable energy generation systems. Our products include converters, inverters, battery chargers, and other power supplies for distributable generation system in both grid-connected and stand-alone applications. The power rating of Sungrow products covers from several hundred watt to large mega-watt systems. The pursuit of Sungrow is to help our customers acquire stable and clean power with minimum cost, maximum reliability and enhanced safety. 40

45 User Manual 8 Appendix 41