CPS SCA23 Installation And Operation Manual
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CPS SCA23 Installation And Operation Manual

Sca series grid-tied pv inverter
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CPS SCA Series Grid-tied PV Inverter
CPS SCA23/28KTL-DO/US-480
Ver 1.2

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Summary of Contents for CPS CPS SCA23

  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA23/28KTL-DO/US-480 Ver 1.2...

  • Page 2: Table Of Contents

    Table of Contents Before You Start… ..................1 Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ........2 Chapter 2 Overview ..................5 2.1 Inverter for grid-tied PV systems ........... 5 2.2 Product features ................5 2.3 Product protection functions ............6 2.4 Circuit structure design ..............6 2.5 Appearance Description ..............
  • Page 3 5.4.3 History .................. 51 5.4.4 System configuration ............53 5.4.5 Power dispatch ..............55 5.4.6 AutoTest ................56 5.4.7 System protection parameters setup ........58 5.4.8 System control parameters ..........60 Chapter 6 Operation .................. 67 6.1 Start-up ..................67 6.2 Shut-down ..................

  • Page 4: Before You Start

    This manual contains important information regarding installation and safe operation of this unit. Be sure to read this manual carefully before using. Thank you for choosing this CPS Grid-tied PV Inverter. This PV Inverter is a high performance and highly reliable product specifically designed for the North American Solar market.

  • Page 5: Chapter 1 Important Safety Instructions

    Chapter 1 IMPORTANT SAFETY INSTRUCTIONS (SAVE THESE INSTRUCTIONS) Please read this user manual carefully before product installation. CPS reserves the right to refuse warranty claims for equipment damage if the user fails to install the equipment according to the instructions in this manual.
  • Page 6 Markings on the product HIGH VOLTAGE: The product works with high voltages. All work on the product must only be performed as described in this document. HOT SURFACE: The equipment is designed to meet international safety standards, but surfaces can become hot during operation. Do not touch the heat sink or peripheral surfaces during or shortly after operation.
  • Page 7 Do not connect the AC output of this equipment directly to any private AC power equipment. CAUTION: CPS SCA23/28KTL-DO series inverter is approx 55kg (≈122 pounds). Please ensure the mounting is properly installed before hanging the the inverter on the bracket.

  • Page 8: Chapter 2 Overview

    Chapter 2 Overview 2.1 Inverter for grid-tied PV systems CPS SCA23/28KTL-DO/US-480 series inverter is suitable for use with commercial and large scale PV grid-tied systems. The system is generally made up of PV modules, DC power distribution equipment, PV inverter and AC power distribution equipment (Figure 2-1).

  • Page 9: Product Protection Functions

     Module temperature monitoring 2.4 Circuit structure design The basic schematic diagram of CPS SCA23/28KTL-DO/US-480 series inverter is shown in Figure 2-2. The input of PV modules passes through surge protection circuitry, DC EMI wave filter, and the front-end boost circuitry to achieve maximum power tracking and boost up voltages.

  • Page 10: Appearance Description

    PV1- PV1- MPPT2 PV2+ PV2+ PV2+ PV2+ PV2+ PV2- Three level PV2- inverter PV2- PV2- PV2- Figure 2-2 Schematic diagram of CPS SCA23/28KTL-DO series inverter 2.5 Appearance Description 5 6 7 Figure 2-3 Appearance sketch of CPS SCA23/28KTL-DO series inverter...
  • Page 11 Main items of the inverter: 1) Main housing of the inverter 2) Wiring box of the inverter 3) Mounting bracket 4) External cooling fans 5) LED indication lights 6) LCD display 7) Key buttons 8) DC switch: DC power on/off 9) AC switch: AC power on/off...

  • Page 12: Chapter 3 Installation

    Chapter 3 Installation Below is the installation procedure for the inverter. Please read carefully and install the product step-by-step. Before installation, please check that the following items are included in the package: Table 3-1 Main items Q’ty Item Note Main housing of the PV inverter Wiring box of the PV inverter...
  • Page 13 M8 Expansion tubes For mounting bracket M8×25 assembling bolts For mounting bracket For wiring box and main housing; 2 M6X12 screw spare parts For mounting bracket and inverter, M5X10 screw external ground connection For internal ground stud connection; 1 M5 flange nut spare part Lifting eye nut M10 For lifting the main housing...

  • Page 14: Recommendations Before Installation

    purchased. 3.1 Recommendations before installation  Check that the product environmental specifications (protection degree, operating temperature range, humidity and altitude, etc) meet the requirements of the specific project location;  Make sure that the power grid voltage is within normal range; ...

  • Page 15: Mechanical Installation

    3.2 Mechanical installation 1) Dimensions Figure 3-1 Dimensions of CPS SCA23/28KTL-DO series inverter...
  • Page 16 2) Installation method (see Figure 3-2): Make sure that the mounting structure (wall, rack, etc) is suitable to support the inverter weight. Follow the mounting guidelines below: (a) If the location permits, install the inverter vertically. (b) If the inverter cannot be mounted vertically, it may be tilted backward by no lower than 15 degrees from horizontal.
  • Page 17 3) Installation space requirement (see Figure 3-3): The distances between the inverters or the surrounding objects should meet the following conditions: NOTICE: The spacing between two adjacently mounted inverters should be ≥1000mm (39.4 inches). Ensure that the air space around the inverter is well ventilated.
  • Page 18 Figure 3-4 Dimensions of holes on the bearing surface (2) Drill holes at the marked positions with a 10mm (0.4in.) drill and put the M8 expansion tubes① into the holes; Fasten the mounting bracket② with the M8x25 assembling bolts③ in the accessory kit. Tool: Electric drill (Ф10mm/0.4in.
  • Page 19 Manual mounting: Two people grab the handle positions marked in Figure 3-7, and mount the inverter onto the bracket. CAUTION: The main housing of the CPS SCA23/28KTL-DO series inverter is about 46.5kg (≈102.5 pounds). Please ensure the mounting is properly installed before hanging...
  • Page 20 2 people to mount the inverter due to the weight of the equipment. Figure 3-6 Mount the main housing on the bracket by lifting Figure 3-7 Position of grab handle...
  • Page 21 (4) Install the wiring box ① Remove the cover plate at the bottom of the main housing. (see Figure 3-8) Tool: No.2 Phillips head screwdriver Figure 3-8 Cover plate of the main housing ② Remove the cover board at the top of the wiring box (see Figure 3-9) Figure 3-9 Cover board of the wiring box Save the cover board and screws, and fix the board on the left side of the wiring box after the wiring box is attached to the inverter housing (see...
  • Page 22 Tool: No. 10 Wrench, torque value of 2.8N.m Figure 3-10 Installation of the wiring box CAUTION: The total weight of the CPS SCA23/28KTL-DO series inverter is about 55kg (≈122 pounds). Please ensure the mounting is properly installed before hanging the the inverter on the bracket.
  • Page 23 Figure 3-11 Fix the main housing and wiring box on the bracket (6) Attach the cover board shown in Figure 3-10 to the left side of the wiring box. (see Figure 3-12) Tool: No.2 Phillips head screwdriver, torque value of 1.2N.m Figure 3-12 Attach the cover board to the left side of the wiring box...
  • Page 24 (7) Optional - Install an anti-theft padlock when the installation is complete. The anti-theft padlock is used to prevent the inverter from being stolen when the equipment is installed outdoors. You can lock the inverter on the bracket, as shown in Figure 3-13: Figure 3-13 Location of the anti-theft padlock The anti-theft padlock should meet the requirement of the dimensions shown in Figure 3-14:...

  • Page 25: Electrical Installation

    3.3 Electrical installation The connection interface of CPS SCA23/28KTL-DO series inverter: INPUT 1 INPUT 2 OUTPUT COMM. ANT. PORT WARNING: High touch current . Earth connection essential before connecting supply. Figure 3-15 External connection ports L1 L2 L3 N Figure 3-16 Internal connection points 1.
  • Page 26 Choose the cables for inverters according to the following configuration table: Table 3-3 Cables specifications Max. cable Position Cable length (m) DC input (﹢/﹣) #12~10AWG PV cable 61 (#10AWG) Cable #10~6AWG #8AWG cable 32 (#8AWG) output recommended (L1/L2/L3/N/PE) RS485 CAT-5e 3x#22~18AWG 1200 communication...

  • Page 27: Dc Connection

    3.3.1 DC connection 1) Working mode CPS SCA23/28KTL-DO series inverter has two PV input sections: DC Input-1 and DC Input-2. These two sections can work under “Parallel mode” or “Independent mode”. (see Figure 3-17) Under Parallel mode, the two PV input sections share one MPP Tracker;...
  • Page 28 terminal blocks, and tighten the wire terminals back on the terminal blocks with a torque value of 1.2N.m. Figure 3-18 Internal configuration of parallel mode Set the selector switch on the LCD board (see Figure 3-19) to parallel mode. S401 Communication board...
  • Page 29 2-----parallel mode mode 2) DC fuse selection CPS SCA23/28KTL-DO inverters can be equipped with typical 12A (23kW Inverter) and 15A (28kW Inverter) DC fuses. Customers must verify that the appropriate fuses are used depending on the actual configuration PV strings.
  • Page 30 3) DC cable connection To ensure the optimum performance of the inverter, please read the following guidelines before DC connection: (a) Confirm the DC configuration referring to Table 3-5 and ensure that the maximum open circuit voltage of the PV modules is lower than 1000 Vdc under any conditions;...

  • Page 31: Ac And Ground Connection

    1-1/4 or 1 inch through the holes. Then put the cables through the conduits inside the wiring box. (e) Crimp the DC cables with the attached pre-insulated end ferrule (16Pcs) by using the the crimping pliers. (see Figure 3-21) Tools: Diagonal pliers, wire stripping pliers, crimping pliers Figure 3-21 Set up the DC input cables (f) Connect the crimped DC cables to the terminal block on the circuit board and fasten the screws, as shown in Figure 3-22:...
  • Page 32 Figure 3-23 Take off the cover of the wiring box 2) Knock out the holes of the DC side and plug the suitable conduits of 1-1/4 or 1 inch through the holes. Then put the cables through the conduit inside the wiring box. 3) The inverter supports 3 kinds of cable connection on the AC side depending on the grouding connection method.
  • Page 33 External grounding point 1.6 N-m OUTPUT COMM. PORT WARNING: High touch current . Earth connection essential before connecting supply. Figure 3-24 AC output and ground cable connection （1） Connect the AC (L1, L2, L3, N) cables to the terminal block and the ground cable to the grounding bar.
  • Page 34 Pre-insulated end ferrule 4pcs OT type terminal,1pcs Core wire Pre-insulated end ferrule Core wire OT type terminal Figure 3-26 AC output and ground cable set up （3） Connect the AC (L1, L2, L3, N) cables to the terminal block and use the OT type terminal to connect the ground cable to the external grounding point at the bottom of the wiring box.
  • Page 35 Either 3 pole or 4 pole AC circuit breaker should be selected per the following specifications: Table 3-8 Specification of AC breaker selection Inverter AC breaker rated current（A） CPS SCA23KTL-DO CPS SCA28KTL-DO...

  • Page 36: Communication Connection

    3.3.3 Communication connection CPS SCA23/28KTL-DO series inverter supports industry standard Modbus RS485 communication. Communication board description S401 S402 Communication board P203 P204 P207 P208 P205 Figure 3-29 Communication board Connectors and communication cards Item Picture Configuration description ① Dry Please see the section after the table for detailed contact information.
  • Page 37 ③/④ Colour Function RS485 port White orange 485+ (RJ45 Orange connector) White green 485- P203, Blue N.C. P204 White blue N.C. Green N.C. White brown COM Brown ⑤ RS485 1 -----NC port 2 -----NC (5pin 3 -----RS485+ connector) 4 -----RS485- P208 5 -----COM ⑥Selector...
  • Page 38 ⑦Selector 1-----Independent mode switch for 2-----Parallel mode setting the connection mode S401 ① Dry contact communication: The inverter features an alarm function that opens or closes a dry contact on the communication board. (available both as contact normally open – N.O. – and as contact normally closed –...
  • Page 39 Dry contact communication Status in fault Status without fault port condition condition P205: N.O. — COM Closed Open P205: N.C. — COM Open Closed Connection Plan: You can connect a LED or other loads to indicate the operational status of the inverter, as shown in the following figure: (or L (or L...
  • Page 40 install an individual miniature circuit-breaker between the dry contact and the power distribution grid. Dry contact communication cable connection: a.) Knock out the holes for suitable cable conduits of 3/4 inch. b.) Put the dry contact communication cable through the cable conduit and inside the wiring box.
  • Page 41 d.) Connect wires to the terminal. Tool: 2 or 2.5mm flat screwdriver Cable Color Function N.O. Blue N.C. Green Figure 3-33 Wire connection e.) Plug the cable terminal into the P205 connector. Figure 3-34 The dry contact communication cable connection...
  • Page 42 ② RS485 communication cable connection: Figure 3-35 RS485 connection 1. Cable connection of RS485 communication: RJ45 connector 2. Cable connection of RS485 network communication: RJ45 connector 3. Cable connection of RS485 communication: 5 pin connector Cable connection of RS485 network communication: 5 pin connector Colour Function White orange 485+...
  • Page 43 Figure 3-36 Crimp RJ45 connector on the RS485 and Ethernet cable 1 -----NC 2 -----NC 3 (Red)--------RS485+ 4 (Blue) -------RS485- 5 (Green)----- COM (1) RS485 communication of single inverter (2) RS485 network communication Figure 3-37 Fasten the cable terminal on the RS485 5 pin connector a.) Put the communication cable through the conduits inside the wiring box, and crimp the cable as shown in Figure 3-36 and Figure 3-37.
  • Page 44 RS485 network connection: When the inverters are monitored via the RS485 communication, the unique RS485 address for each inverter can be set through the LCD interface. Up to 31 inverters can be connected together in the RS485 communication network. The Daisy-chain topology is recommended for the RS485 network connection, as shown in Figure 3-38.

  • Page 45: Chapter 4 Commissioning

    Chapter 4 Commissioning WARNING: Please follow the guidelines below before on-grid operation to eliminate possible dangers to ensure safety. 4.1 Commissioning Checklist 4.1.1 Mechanical installation Make sure that the mounting bracket is secure and all the screws have been tightened to the specified torque values. (Please refer to 3.2 Mechanical installation) 4.1.2 Cable connections ...
  • Page 46 the PV array is sufficient, the LCD screen of inverter will light up. The inverter will then start up with the message “sys checking”. 4.) Set up the grid standard: INSTRUCTION: Please check with your local electricity supply company before selecting the grid standard.
  • Page 47 Figure 4-2 Select grid standard 5.) When the LCD screen shows the normal operation status (Figure 4-3) and the “RUN” light on the LED panel lights up, it indicates that the grid connection and power generation are successful. 725 V 720 V 27.9 22.9...

  • Page 48: Chapter 5 User Interface

    Chapter 5 User Interface 5.1 Description of LCD panel The inverter’s LCD panel mainly consists of LCD screen, LED indicator lights, buzzer and 4 keys, as shown in Figure 5-1. POWER GRID FAULT Figure 5-1 LCD panel Interpretation for the indicator lights is shown in Table 5-1 and function of the keys is shown in Table 5-2.
  • Page 49 operation indication Derated running status (light up 0.5s, Flash light light off 1.6s) Light In other operation status or power supply not working Light Grid is normal Grid status GRID Flash Grid fault (light up 0.5s, light off 1.6s) indication Light light Power supply not working...

  • Page 50: Operation State

    Page down in selection menu/-1 when Down setting parameters 5.2 Operation state Table 5-1 indicates the definitions of LED, i.e. indicates the information of the inverter’s operation state. It indicates that the system is energized and under DSP control when “POWER” lights up. “RUN”...
  • Page 51 Figure 5-2 LOGO interface (2) Indication of inverter operation mode: Sys.Checking >>>>>> Figure 5-3 Inverter system check ongoing Standby >>>>>> Figure 5-4 Inverter system in standby mode 725 V 720 V 27.9 22.9 38.5A 31.9A 223.2 183.7 08/12 13:10:05 08/12 13:10:10 Figure 5-5 Default display interface for normal operation...

  • Page 52: Menu Functions

    GridV.OutLim Figure 5-6 Fault indication interface LCD screen will display different mode interfaces based on the operation modes of the inverter. There are four operation modes: startup system check mode (as shown in Figure 5-3), stand-by mode (as shown in Figure 5-4), normal operation mode (as shown in Figure 5-5, the switching time between (a) and (b) is 5 seconds), and fault mode (as shown in Figure 5-6).

  • Page 53: Operation Information

    Figure 5-7 Main menus on the LCD screen The main operation interface of LCD screen has 5 menus, i.e. “1 OP. Info”, “2 Alarm”, “3 History”, “4 Setting” and “5 Dispatch”. The users may select options with UP and DOWN, and then press ENT to confirm selection. The users can return to the default indication interface by pressing ESC.

  • Page 54: Alarm

    Remarks：The LCD display is shown as follows when PV parallel mode is selected. 360.0V 14.7A Figure 5-9 Operation information indication (PV parallel mode) 5.4.2 Alarm As described before, if a fault occurs during normal operation of the inverter, corresponding fault messages will be indicated in “2 Alarm” menu in addition to the sound and light alarms.
  • Page 55 History”: “1 HistErr”, “2 OP. Recd”, “3 Version” and “4 TotalTag”. (1) The error log can store up 100 fault messages in “1 HistErr” menu. (2) The last 21 days of operation history data is available to be checked in “2 OP.

  • Page 56: System Configuration

    5.4.4 System configuration Move the cursor to “4 Setting” in the main interface. Press ENT to enter the password: UP -> DOWN -> UP -> DOWN . Press ENT to confirm, and set the current system parameters, as shown in Figure 5-12. There are 7 submenus in “4 Setting”: “1 ON/OFF”, “2 Language”, “3 Buzzer”, “4 SysTime”, “5 Commun.”, “6 OtherCmd”...
  • Page 57 (1) The inverter can be started and shut down with “1 ON/OFF” menu. Move the cursor to “ON” and press ENT , “ON State” will then be indicated at the bottom of LCD screen; move the cursor to “OFF” and press ENT , then “OFF State”...

  • Page 58: Power Dispatch

    4. “MPPTCycle” is used to set up the cycle time of MPPT Scan. Move the cursor to this menu, press ENT to set up the cycle time. Use UP and DOWN to adjust the MPPT cycle time. Press ENT to confirm the setting. 5.

  • Page 59: Autotest

    5.4.6 AutoTest INSTRUCTION: Autotest is only needed for CEI 0-21 grid standard. The “6 Autotest” appears ONLY when users select the “CEI 0-21” grid standard. Users can do the Class I and Class II protection tests to the grid voltage and frequency by Class I and Class II protection tests. Select “6 Autotest”...
  • Page 60 Inverter is NOT Running Test Aborted! RadiationTooLow 1 OP.infor 1 VMaxTest1 Select VolMax1Test 2 Alarm 2 VMinTest1 VMaxTest1 Testing... 3 History 3 FMaxTest1 Start? →4 FMinTest1 4 Setting UacMax1 -- V Uac1 -- V 5 Dispatch 5 VMaxTest2 Uacoff1 -- V 6 Autotest 6 VMinTest2 Toff...

  • Page 61: System Protection Parameters Setup

    5.4.7 System protection parameters setup Press DOWN and ENT at the same time in the main interface and enter the password (UP -> DOWN -> UP -> DOWN) to access the system protection parameters setup menu. This menu includes 6 submenus: “1 SysPara”, “2 Restart”, “3 Recover”, “4 ClrErrRecd”...
  • Page 62 Please refer to the “6.2 Manual shutdown” to turn off the inverter. INSTRUCTION: CPS SCA23/28KTL-DO series PV inverter supports 7 grid standards. Please check with your local electricity supply company before selecting the grid standard. If the inverter is operated with a wrong grid standard, the electricity supply company may cancel the operation license.

  • Page 63: System Control Parameters

    permitted. 5.4.8 System control parameters The “1 SysPara” menu has 6 submenus, including ”1 GridVProtect”, ”2 GridFProtect”, ”3 ON/OFF”, ”4 PowerContr”, ”5 LVRTSet” ”6 OtherProtect”. (1) ”1 GridVProtect” and ”2 GridFProtect” menus: Set up the parameters of grid voltage, frequency protection and recovery, etc, as shown in Table 5-3: Table 5-3 Parameters of grid voltage and frequency (IEEE-1547) Setup range (lower limit, Parameter name...
  • Page 64 Max. grid voltage Recovery threshold value of GridVminRecT(V) {0, 432.4, 480.0} Min. grid voltage Recovery time of grid GridVRecT(S) {0, 300.00, 600.00} voltage protection Protection threshold value of GridF.Max1(Hz) {50.00, 60.50, 65.00} Level 1 Max. grid frequency Trip time of Level 1 Max. grid FmaxTripT1(S) {0, 0.16, 600.00} frequency...
  • Page 65 Threshold value of grid GridV.Unbal(%) {0.1, 2.6, 10.0} voltage unbalance (2) ”3 ON/OFF” menu: Set up the start-up and shut-down control parameters. Table 5-4 Start-up and turn-off control parameters Setup range (lower limit, Parameter name Description default & upper limit) PVStartVol(V) PV start-up voltage {300.0, 330.0, 400.0}...
  • Page 66 1). None： No mode/disable reactive power mode 2). Dispatch： Remote power dispatch mode Note: The ActivePower, PF and Q value can be adjusted by remote software if the “Dispatch” is selected. 3). QReactSet： Set the Q value Note: Change the reactive power by adjusting the Q value (reactive compensation) 4).
  • Page 67 Note: The reactive compensation changes according to the grid voltage change, as shown in Figure 5-18. INSTRUCTION: The Q(U) curve function is only available for CEI 0-21 and IEEE-1547 grid standards. Q(%) (QuCurveU2i,QuCurveQ2i) Inductive (QuCurveU1, QuCurveQ1) (QuCurveU1i, U(V) QuCurveQ1i) Capacitive (QuCurveU2,QuCurveQ2) Figure 5-18 Q(U) curve mode The Table 5-5 lists the parameters of QReactSet, PF Set, PF(P) Curve...
  • Page 68 PFCurvePF1 (-0.800, 1.000, 0.800) See Figure 5-17 PFCurveP2(%) (0, 100.0%, 100.0%) See Figure 5-17 PFCurvePF2 (-0.800, -0.900, 0.800) See Figure 5-17 PF curve trip PFCurvTripV(V) (480.0, 480.0, 528.0) voltage PF curve revocation PFCurveReV(V) (422.4, 432.0, 480.0) voltage QuCurveU1(V) (480.0, 518.4, 528.0) See Figure 5-18 QuCurveQ1(%) (-100.0%, 0.0%, 100.0%)
  • Page 69 Table 5-7 Protection parameters of leakage current and output DC component Setup range (lower limit, default Parameter name Description & upper limit) Leakage current LeakCurMax(mA) {0, 250, 300} Max. limit {0, 135, 1000} (CPS SCA23KTL) DC component IdcMax(mA) current Max. limit {0, 165, 1000} (CPS SCA28KTL)

  • Page 70: Chapter 6 Operation

    Chapter 6 Operation 6.1 Start-up Manual start-up: Manual start-up is required after regulation setting or manual (fault) shut-down. Move the cursor from the main operation interface to “4 Setting”. Press ENT and go to submenu “1 ON/OFF”. Then move the cursor to “ON”...
  • Page 71 Sys.Checking >>>>>> Figure 6-1 System self check ongoing This mode indicates that the inverter is checking whether it is ready for normal operation after the manual start-up of inverter. (2) Normal operation mode: Default indication interface for normal operation is shown in Figure 6-2 (a) and 6-2 (b). The switching time between (a) and (b) is 5 seconds.

  • Page 72: Grid-Tied Power Generation

    DC and AC. 6.4 Grid-tied power generation CPS SCA23/28KTL-DO/US-480 series inverter has an automatic grid-tied power generation process. It will check constantly whether AC power grid meets the conditions for grid-tied power generation, and also test whether the...
  • Page 73 PV array has adequate energy. After all conditions are met, the inverter will enter grid-tied power generation mode. While in grid-tied power generation, the inverter can detect the power grid at all times, and also keep the photovoltaic array output in maximum power point tracking (MPPT) mode. In case of any abnormity, the inverter will enter the protection program immediately.

  • Page 74: Chapter 7 Maintenance And De-Installation

    Chapter 7 Maintenance and De-installation 7.1 Fault shut down and troubleshooting 7.1.1 LED fault and troubleshooting Please refer to the definition of LED lights in Table 5-1 and troubleshoot according to Table 7-1: Table 7-1 Trouble shooting of LED lights LED fault status Solutions Neither the “Power”...
  • Page 75 overfrequency / underfrequency, high environmental temperature or internal malfunction of the machine. The fault information will be displayed on the LCD screen. Please refer to “5.4.2 Present fault” for detailed operation. The causes of a fault can be identified based on the faults listed in Table 7-2.
  • Page 76 will be eliminated automatically; 2.Switch off 3-phase working power supply and then reboot the system; 3.Contact after-sales service personnel Definition: Cooling fan failure by visual check Possible causes: 1.Fan is blocked; 2.Fan service life has expired; 3. Fan socket connecter has poor contact. 3.ExtFanErr Recommended solutions: 1.Observe for 5 minutes and see whether the alarm...
  • Page 77 1.Ambient temperature outside the inverter is too high; 2.Fan is blocked; 3. Convection airflow is insufficient due to improper installation. Recommended solutions: 1.Confirm that external ambient temperature is within the specified range of operating temperature; 2.Check whether air inlet is blocked; 3.Check whether fan is blocked;...
  • Page 78 and power grid is disconnected or has any fault; 4.Contact after-sales service personnel Definition: Grid voltage frequency is abnormal, or power grid is not detected Possible causes: 1.Grid frequency is abnormal; 2.Cable connection between the inverter and the grid is poor; 3.GridF.OutLim Recommended solutions: 1.Observe for 10 minutes and see whether the...
  • Page 79 4.Contact after-sales service personnel Definition: PV module is connected inversely Possible causes: PV positive pole and negative pole are connected 5.PV1 (2) Reverse** inversely; Recommended solutions: 1.Check whether positive pole and negative pole are connected inversely; 2.Contact after-sales service personnel Definition: System leakage current is too high Possible causes:...
  • Page 80 Recommended solutions: 1.Observe for 10 minutes and see whether the alarm will be eliminated automatically; 2.Check insulation of PV system; 3.Contact after-sales service personnel Definition: ARC fault Possible causes: Protection actions of ARC board Recommended solutions: 8.ARC Protect 1. Use “ARCFaultClear” to clear the ARC fault. (Refer to section 5.4.4) 2.
  • Page 81 Protection procedure occurs inside the inverter Recommended solutions: 1.Observe for 10 minutes and see whether the alarm will be eliminated automatically; 2.Contact after-sales service personnel Definition: Internal fault of the inverter Possible causes: Fault occurs inside the inverter Fault IntFault0010~0150 Recommended solutions: 1.The inverter can be forced to restart once if it is required by operation and if it is confirmed that...

  • Page 82: Product Maintenance

    7.2 Product maintenance 7.2.1 Check the electrical connection Check all the cable connections as a regular maintenance inspection every 6 months or once a year. 1.) Check the cable connections. If loose, please tighten all the cables referring to “3.3 Electrical installation”. 2.) Check for cable damage, especially whether the cable surface is scratched or smooth.
  • Page 84 50~60mm 50~60mm Figure 7-1 Replace cooling fans...

  • Page 85: Replace The Inverter

    7.2.4 Replace the inverter Please confirm the following things before replacing the inverter: (1) The inverter is turned off. (2) The DC switch of the inverter is turned to OFF position. Then Replace the inverter according to the following steps: a.) Unlock the padlock if it is installed on the inverter.
  • Page 86 c.) Use a No. 10 Hex wrench to remove the 4 screws between the main housing and the wiring box. Lift up the main housing and disconnect from the wiring box. Figure 7-4 Disconnect the main housing from the wiring box d.) Use a No.2 Phillips head screwdriver to remove the 2 screws on the left side of the wiring box, and take off the cover board.

  • Page 87: De-Installing The Inverter

    7.3 De-installing the inverter De-install the inverter according to the following steps when the service time is due or for other reasons: DANGER: Please disconnect the electrical connection in strict accordance with the following steps. Otherwise, the inverter will be damaged and the service personnel’s life will be endangered.

  • Page 88: Chapter 8 Technical Data

    Chapter 8 Technical Data Model Name SCA23KTL-DO/US-480 SCA28KTL-DO/US-480 DC Input Max. PV Power 31kW 38kW Nominal DC Input 24kW 29kW Power Max. DC Input Voltage 1000Vdc Operating DC Input 300-900Vdc Voltage Range Start-up DC Input 330V/300W Voltage / Power Number of MPP Trackers MPPT Voltage Range 480-800Vdc...
  • Page 89 Power Factor >0.99 (± 0.8 adjustable) Current THD <3% AC Disconnection Type Load rated AC switch System Topology Transformerless Max. Efficiency 98.4% CEC Efficiency 98.0% Stand-by / Night <20W / <2W Consumption Environment Protection Degree NEMA 4 Cooling Variable speed cooling fans Operating Temperature -13°...
  • Page 90 Note 1: When the DC input voltage is lower than 400V or higher than 800V, the inverter begins derating, as shown in Figure 8-1: Po/Pn 100% 1000 (480) PV Voltage (V) Figure 8-1 SCA23/28KTL derating curve of PV input voltage Note 2: When the ambient temperature is higher than 113℉...
  • Page 91 Note 3: When the altitude is higher than 6562ft (2000m), the operating temperature of the inverter needs derating, as shown in Figure 8-3: Tamb (60℃) 140℉ (45℃) 113℉ 6562ft 13123ft Altitude (2000m) (4000m) Figure 8-3 SCA23/28KTL derating curve with high altitude Note 4: The inverter can output the AC power with full loads under 90%~110% of the rated grid voltage.

  • Page 92: Chapter 9 Limited Warranty

    The warranty policy of this product is specified in the contract; otherwise, the warranty period is 5 years. For service, Chint Power Systems America will provide local support. For Warranty terms, please refer to the CPS America standard warranty policy in place at time of purchase.

  • Page 93: Appendix: Instruction Of Inverter Selection

    Options □ DC and AC SPD The following figure shows the wiring box equipped with the optional components: DC SPD AC SPD The position of the optional communication card Figure A-2 Internal structure of CPS SCA23/28KTL-DO inverter with optional components...
  • Page 94 CHINT POWER SYSTEMS AMERICA CO., LTD. Address: 700 International Parkway Web: www.chintpower.com/na Suite 102 Email: americasales@chintpower.com Richardson TX 75081 Service Hotline: 855-584-7168 SHANGHAI CHINT POWER SYSTEMS CO., LTD. All rights reserved. Specifications and designs included in this manual are subject to change without notice. CHINT POWER 2013/12-MKT PN: 9.0020.0119C0...

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