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Chapter 6 Service and Maintenance

The CPS SC20KTL-DO/US-480 inverter is usually maintenance-free.

The following regular maintenance steps must nevertheless be carried out

at regular intervals to ensure the i

nverter’s operation with optimal

performance.

6.1 Disassembling of fan tray assembly

(1) Screw off the bolts and remove the two panels on both sides of the

inverter as shown in Figure 6-1; (Tool: PH2 cross screwdriver)

Figure 6-1 Removal of panels on both sides

(2) Disconnect the fan tray assembly from the inverter by unplugging the

CAUTION:

Although designed to meet international safety standards, the

PV-Inverter can become hot during operation. Do not touch the heat

sink or peripheral surfaces during or shortly after operation.

Fan tray assembly is

inside the slot

Содержание SC Series

Страница 1: ...CPS SC Series Grid tied PV Inverter CPS SC20KTL DO US 480 Installation and Operation Manual Ver 1 2 ...

Страница 2: ...ection 26 Chapter 4 User Interface 29 4 1 Description of LCD panel 29 4 2 Operation state 31 4 3 Interface and menu functions 31 4 3 1 Interface types 31 4 3 2 Menu functions 33 4 3 3 Operation information 34 4 3 4 Alarm 35 4 3 5 History 35 4 3 6 System setup 36 4 3 7 Power Dispatch 38 4 3 8 System protection parameters setup 39 Chapter 5 Operation 43 5 1 Start up 43 5 2 Shut down 43 5 3 Operation...

Страница 3: ... This PV Inverter is a high performance and highly reliable product specifically designed for the North American Solar market If you encounter any problems during installation or operation of this unit first check this manual before contacting your local dealer or supplier Instructions inside this manual will help you solve most installation and operation difficulties Please keep this manual on ha...

Страница 4: ...tion which if not avoided will result in death or serious injury WARNING WARNING indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE indicates a hazardous situation which if not avoided could result in equipment working abnormally or p...

Страница 5: ...arth through the PE protective earthing cable to ensure operational safety DANGER Please disconnect the inverter from AC grid and PV modules before opening the equipment When the PV array is exposed to light it supplies DC voltage to this equipment Make sure hazardous high voltage and energy inside the equipment has been discharged Do not operate or maintain the inverter until at least 10 minutes ...

Страница 6: ...AUTION CPS SC20KTL DO US 480 inverter is approx 132lbs 63kg Please ensure the mounting is properly installed before hanging the the inverter on the bracket NOTICE This inverter is designed to connect AC power only to the public grid Do not connect the AC output of this equipment directly to any private AC power equipment INSTRUCTION Conduits shall be used as the cable protectors for cable connecti...

Страница 7: ...power is supplied to the electricity grid DC power distribution equipments AC Grid Bidirectional electric meter AC power distribution equipments Figure 2 1 Grid tied PV system 2 2 Product type description CPS SC20KTL DO US 480 is a two MPPT PV inverter integrated with the DC and AC switches for indoor and outdoor application The suffix US means that this model of inverter passes the UL certificati...

Страница 8: ...the maintenance more flexible and safer Besides the inverter has the function to support one or two independent MPPTs input to improve the system efficiency Meanwhile the inverter can automatically identify the connection way between PV modules due to its excellent self adaption ability 2 4 Circuit structure design The basic schematic diagram of CPS SC20KTL DO US 480 is shown in Figure 2 2 The inp...

Страница 9: ...nce sketch of CPS SC20KTL DO US 480 Description of main items of the inverter shown in Figure 2 3 1 LCD key buttons operate the functions and change settings of inverter 2 LCD display indicates data 3 LED indicator lights indicate the status of inverter 4 DC input knockouts 4 AC output ground knockout 1 and signal port 1 from left to right 5 DC switch control the DC power on and off 6 AC switch co...

Страница 10: ...ter 2 Mounting bracket 1 upon which Inverter is hung and mounted onto a wall 3 User manual 1 Installation and operation manual 4 Warranty card 1 for maintenance and repair 5 Accessory kit 1 contains all necessary accessories The 5 Accessory kit contains items listed below Table 3 2 Accessories Item Q ty Purpose M 8 25L expansion bolts nuts 8 pairs for bracket installation 2 pairs for backup use M5...

Страница 11: ...the local electricity supply authority has granted permission to connect to the grid Installation personnel must be qualified electricians or people who have received professional training Sufficient space is provided to allow the inverter cooling system to operate normally Install the inverter away from flammable and explosive substances Avoid installing the inverter in locations that exceed the ...

Страница 12: ...l 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 is allowed to be tilted backward by Max 15 c Do NOT mount the inverter forwards d Do NOT mount the inverter in a horizontal position e Do NOT mount the inverter upside down ...

Страница 13: ...the wall as shown in Figure 3 3 The distances between the inverter and the surrounding objects should meet the following conditions two sides from the walls 11 81 inches top distance 11 81 inches bottom distance 23 62 inches the minimum spacing between two adjacently mounted inverters 23 62 inches ...

Страница 14: ...12 Figure 3 3 Inverter mounting dimensions 3 Secure the bracket with bolts through the mounting holes and install the inverter a Mark the 6 bolt holes for mounting the bracket as shown in Figure 3 4 ...

Страница 15: ...ill holes at the marked positions with a diameter of 0 4 inch drill and put the 6 M8 25 expansion bolts into the holes c Take the mounting bracket out of the package and secure the bracket on the wall with the 6 nuts in pair as shown in Figure 3 5 ...

Страница 16: ... two panels on both sides of the inverter as shown in Figure 3 6 Figure 3 6 Removal of panels before mounting inverter e Two people grab at the position on each side lift up the inverter and then hang it on the bracket Figure 3 7a e Make sure the inverter is securely mounted on the bracket ...

Страница 17: ...15 Figure 3 7a Mounting inverter on the bracket Figure 3 7b Mounting inverter on the bracket Hand Grab ...

Страница 18: ...16 Figure 3 7c Mounting inverter on the bracket Figure 3 7d Mounting inverter on the bracket ...

Страница 19: ...17 Figure 3 7e Mounting inverter on the bracket f Put the two removed panels back and secure them with 4 M4 12 bolts on each side as shown in Figure 3 8 Figure 3 8 Securing panels on both sides ...

Страница 20: ...diagram of conduits 3 3 1 DC connection 1 To ensure the optimal performance of the inverter please read the following guidelines before DC connection a First make sure that the maximum open circuit voltage of the PV modules is lower than 600Vdc under any conditions b The inverter has 2 MPPTs Ensure that the Max DC input current of each MPPT does NOT exceed 35A c Confirm that the PV modules for eac...

Страница 21: ... PV1 PV1 PV2 PV2 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Inverter IN1 IN1 IN2 IN2 PV1 PV1 PV2 PV2 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Inverter IN1 IN1 IN2 IN2 7 strings PV1 PV1 PV2 PV2 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Inverter IN1 IN1 IN2 IN2 PV1 PV1 PV2 PV2 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Inverter IN1 IN1 IN2 IN2 6 strings PV1 PV1 PV2 PV2 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Inverter IN1 IN1 IN2 IN2 PV1 PV1 PV2 PV...

Страница 22: ...ould be chosen according to the short circuit current of PV modules The 600VDC Littelfuse KLKD fuse series are recommended The detailed information is available for customers to find and download from http www littelfuse com The recommended fuse types are listed in the following table Table 3 5 Recommended fuse types DC input 2 strings MPPT 3 strings MPPT 4 strings MPPT Fuse KLKD 30 KLKD 15 KLKD 1...

Страница 23: ...V1 Inverter IN1 IN1 IN2 IN2 PV1 PV2 PV2 1 2 3 4 P1 1 2 3 4 P2 1 2 3 4 P3 1 2 3 4 P4 1 string PV1 Inverter IN1 IN1 IN2 IN2 PV1 1 2 3 4 P1 1 2 3 4 P2 1 2 3 4 P3 1 2 3 4 P4 Table 3 7 Wiring requirement 2 strings 1 string Positive 8AWG 4AWG Negative 8AWG 4AWG Bolts M5 Torque value 1 19N M 10 5Lb In b Insert the cables through steel conduits and strip the skin 0 4 inch off the cables as shown in Figure...

Страница 24: ...from left to right is PV1 PV1 PV2 PV2 Connect the PV1 and PV2 to the corresponding fuse socket of the negative pole and connect the PV1 and PV2 to the corresponding fuse socket of the positive pole with M5 12 bolts 4 PCS in total as shown in Figure 3 12 Figure 3 12 Wire connection of DC input e For the inverter with 1 MPPT working alone connect J1 IN1 with J3 ...

Страница 25: ...the Wiring box 1 MPPT working alone 3 3 2 AC and ground connection The following describes how to connect the AC output and grounding cables between the inverter and the public power grid 1 Use the recommended cables L1 Line 1 L2 Line 2 L3 Line 3 Neutral and Gnd Equipment grounding conductor 8 10AWG copper cored soft cables Table 3 8 Wiring requirement L1 L2 L3 Neutral Gnd Wire diameter 8 10AWG Bo...

Страница 26: ... Connect the L1 L2 L3 and Neutral red black blue grey AC output wires to the corresponding terminals on the PCB board 3 Wire connection for grounding a The Gnd wire Equipment grounding conductor is recommended to be green or green with continuous yellow stripes per National Electrical Code Insert the cable through the steel conduit and strip the skin 0 4 inch off the cables as shown in Figure 3 16...

Страница 27: ...agram for terminal crimping of grounding conductor c Connect the Gnd wire with a M5 nut at the marked place on the lower right side of the Wiring box as shown in Figure 3 18 Figure 3 18 Diagram for wire connection of AC output and Grounding ...

Страница 28: ...t the RS485 communication bus cable through the RS485 1 or RS485 2 port of the inverter directly Wiring requirement of RS485 1 2 is shown in Table 3 9 Table 3 9 RS485 1 2 wiring requirement 2 The wires are labeled 1 8 from left to right as shown in Figure 3 19 Figure 3 19 Diagram of RS485 1 2 wiring No Color Function 1 White orange 485 2 Orange N C 3 White green 485 4 Blue N C 5 White blue N C 6 G...

Страница 29: ...commended for the RS485 network connection as shown in Figure 3 20 Other communication topologies such as the star networks are not recommended 1 Datalogger 2 N Figure 3 20 R485 network connection 4 A terminal resistance of 120 ohms connected between Pin 1 and Pin 3 of RS485 1 2 of the first inverter in the multiple inverters string and data logger as shown in Figure 3 20 is recommended 5 The comm...

Страница 30: ...28 Figure 3 21 Diagram of communication wiring ...

Страница 31: ...retation for the indicator lights is shown in Table 4 1 and function of the keys is shown in Table 4 2 Table 4 1 LED Indication LED light Name Status Indication POWER Working power light Light on Energized control panel starts to work Light off Power supply not working RUN Grid tied operation indication light Light on In grid tied power generation state Flash Derated running status light up 0 5s l...

Страница 32: ...tion light Light on Indicates a Fault Slow flash Indicates Alarm light up 0 5s light off 2s Fast flash Protective action light up 0 5s light off 0 5s Light off No fault or power supply not working Table 4 2 Definitions of the keys Key Description Definition of function Escape Back end mute Enter Confirm entering the menu confirm set point Up Page up in selection menu Down Page down in selection me...

Страница 33: ...when the grid is normal during the operation of the inverter Otherwise GRID will blink until the grid restores to normal FAULT will blink quickly as a fault except grid abnormality occurs FAULT will not light out until the fault is eliminated The light will blink slowly when an alarm occurs FAULT keeps being lighted up when an internal fault occurs The buzzer will give alarms if a fault involving ...

Страница 34: ...O interface 2 Indication of inverter operation mode Sys Checking Figure 4 3 Inverter system check ongoing Standby Figure 4 4 Inverter system in standby mode a b Figure 4 5 Default display interface for normal operation ...

Страница 35: ...he default indication interface mainly indicates PV voltage PV current grid voltage instant power daily generated power and time information under normal operation The fault information of the most recent current fault will be indicated on the LCD screen when the inverter is in fault mode 4 3 2 Menu functions LCD screen displays default indication interface when the inverter is in operation mode P...

Страница 36: ...tion interface by pressing ESC 4 3 3 Operation information When the cursor moves to 1 OP Info in the main interface you should press ENT to select the operation information as shown in Figure 4 8 Check the information by pressing PAGEUP and PAGEDOWN Return to the previous menu by pressing ESC 1 OP Info Yield 23 5kWh MPac 20 0kW Pac 19 8kW RunT 12 1 h Uab 480 0V Ubc 480 9V Uca 480 5V Freq 60 0Hz Ia...

Страница 37: ...story in the main interface Press ENT to check the history information as shown in Figure 4 10 There are 4 submenus in 3 History 1 ErrRecd 2 OP Recd 3 Version and 4 TotalTag 1 UP to 100 pieces of latest fault messages can be recorded and found in 1 ErrRecd menu 2 The latest 21 days operation history data is available to be found in 2 OP Recd menu All variable names in the data comply with the cont...

Страница 38: ...I If not existed If existed Pls Input Date 2 ß 12 15 RunT 7 0 h Mpac 20 0KW Yield 123 5KWh Mach Ver 1 00 Serial No 10141106001 T Yield KWh 152123 5 Figure 4 10 History menu and submenu 4 3 6 System setup Move the cursor to 4 Setting in the main interface Press ENT to set the current system parameters as shown in Figure 4 11 There are 5 submenus in 4 Setting 1 ON OFF 2 Language 3 Buzzer 4 SysTime a...

Страница 39: ...te unmute in 3 Buzzer menu Key beep and Alarm beep can be chosen by pressing PAGEUP and PAGEDOWN Shift between Enable and Disable by pressing PAGEUP and PAGEDOWN if the cursor is on the Key beep Complete the setup by pressing ENT Similarly the Alarm beep can be set up in the same way 4 Set up the system date and time with 4 SysTime menu These parameters are of critical importance and will be used ...

Страница 40: ...vePower and PowerFactor parameters can be set up through LCD operations as well as remote control by software Local dispatch order Service personnel can adjust the ActivePower and PowerFactor parameters through LCD operations For detailed setup steps please refer to 4 3 8 System protection parameters setup The current parameters of ActivePower and PowerFactor can be checked by the following steps ...

Страница 41: ...monitoring software For detailed information please refer to the manual of our monitoring system products 4 3 8 System protection parameters setup In Standby mode press PAGEDOWN and ENT at the same time in the main interface and enter the password PAGEUP PAGEDOWN RIGHT LEFT the system parameter setup menu is accessed This menu includes 4 submenus 1 SysPara 2 Restart 3 Recover and 4 ClrErrRecd as s...

Страница 42: ...0 2 00S 5 GridF Max Hz Grid frequency upper limit 50 00 60 50 65 00Hz 6 GridF Min Hz Grid frequency lower limit 45 00 59 30 60 00Hz 7 GridFTripT S Trip time under Min Grid F 0 05 0 08 300 00S 8 IsoResis KOhm Insulation impedance lower limit 200 600 1200KΩ 9 ActivePower Active power derating 80 0 100 0 100 0 10 PowerFactor Reactive power compensation 0 900 1 000 0 900 INSTRUCTION The function of ac...

Страница 43: ...peration mode Otherwise a FaultOperated will be prompted 4 In 4 ClrErrRecd menu history information of the faults can be cleared A confirmation is required to clear the records INSTRUCTION The Restart function is effective only when the fault IntFaultA O in the troubleshooting table occurs The inverter may restore to normal operation automatically if alarm or protection faults occur This function ...

Страница 44: ...80 Pls Input Pwd PwdError Pls Input Again GridV Min V 422 GridVminTripT S 1 80 GridF Min Hz 59 30 GridFTripT S 0 08 Initialization Recovering Success Failure Are You Sure Restarting Success Failure FaultOperated FaultOperated Clear Errors Success Figure 4 14 System parameter setup ...

Страница 45: ...rid is normal and the ambient temperature is within allowable operating range 5 2 Shut down Manual shutdown Normally manual shutdown is not required It can be shut down manually if repair or maintenance is required Move the cursor from the main operation interface to 4 Setting Press ENT and go to submenu 1 ON OFF Move the cursor to OFF and press ENT and then the inverter will be shut down Automati...

Страница 46: ...ult indication interface for normal operation In this mode the inverter converts the power generated by PV modules to AC continuously and feeds into the power grid 3 Standby mode as shown in Figure 5 3 The inverter will turn into standby mode when the output voltage and power of PV modules do not meet the startup conditions or PV voltage and input power are lower than the set point The inverter wi...

Страница 47: ...rding to the instructions SPICommErr Figure 5 4 Fault indication interface 5 4 Grid connection and power generation CPS SC20KTL DO US 480 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 PV array WARNING All the installation and wiring connections should be perfo...

Страница 48: ...er will enter standby mode When the voltage of PV array changes and becomes stable and higher than the required set value the inverter will attempt to start grid tied power generation again 5 5 Fault shutdown The inverter will be shut down automatically when the PV power generation system fails such as output short circuit grid overvoltage undervoltage grid overfrequency underfrequency high ambien...

Страница 49: ...ase working power supply and then reboot the system 3 Contact after sales service personnel 2 SPICommErr Definition Communication inside inverter fails Possible causes 1 Communication circuits inside inverter are loose 2 LCD software problem 3 Inverter software problem Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2 Turn off 3 phase workin...

Страница 50: ... reboot the system 3 Contact after sales service personnel 4 ExtFanErr Definition The visible fan from outside view is working abnormally Possible causes 1 Fan is blocked 2 Fan service life has expired 3 Fan socket connecter has poor contact Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2 Check for foreign matters on fan blades 3 Switch of...

Страница 51: ...rter is too high 2 Fan is blocked 3 Cooling is affected because of incorrect installation Recommended solutions 1 Confirm that external ambient temperature is within the specified range of operating temperature 2 Check whether radiation air inlet is blocked 3 Whether radiation fan is blocked 4 Check whether the location of installation is appropriate or not 5 Observe for 30 minutes and see whether...

Страница 52: ...nd power grid is disconnected or has abnormalities 4 Contact after sales service personnel 3 GridF OutLim Definition Grid voltage frequency is abnormal or power grid is not detected Possible causes 1 Grid frequency has abnormalities 2 Cable connection between the inverter and the grid is poor Recommended solutions 1 Observe for 10 minutes and see whether the alarm will be eliminated automatically ...

Страница 53: ...the PV input switch wait for 5 minutes and then turn on the switch again 4 Contact after sales service personnel 5 PV1 2 Reverse Definition PV module is connected inversely Possible causes PV positive pole and negative pole are connected inversely Recommended solutions 1 Check whether positive pole and negative pole are connected inversely 2 Contact after sales service personnel 6 GFCI Err Definit...

Страница 54: ...ound exceeds the specified range Possible causes Air humidity is high 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 8 IntProtectA Z Definition Internal protection of the inverter Possible causes Protection procedure occurs inside the inverter Recommended solutions 1 O...

Страница 55: ...ssible causes Fault occurs inside the inverter Recommended solutions 1 The inverter can be forced to restart once if it is required by operation and if it is confirmed that there is no other problem 2 Contact after sales service personnel ...

Страница 56: ...assembly 1 Screw off the bolts and remove the two panels on both sides of the inverter as shown in Figure 6 1 Tool PH2 cross screwdriver Figure 6 1 Removal of panels on both sides 2 Disconnect the fan tray assembly from the inverter by unplugging the CAUTION Although designed to meet international safety standards the PV Inverter can become hot during operation Do not touch the heat sink or periph...

Страница 57: ...e 4PCS screws off the fan bracket as shown in Figure 6 3 and 6 4 Tool 0 12 inch Hexagon socket screw key Figure 6 3 Unscrew the fan bracket on the left side Figure 6 4 Unscrew the fan bracket on the right side 4 Pull out the fan tray assembly from the left side of inverter as shown in Figure 6 5 ...

Страница 58: ...damage of fans 6 2 Restoring of fan tray assembly 1 Insert the fan tray assembly from the left side of the inverter as shown in Figure 6 6 Figure 6 6 Inserting the fan tray assembly 2 Hook the fan tray assembly inside the Main housing at the right end as shown in Figure 6 7 Figure 6 7 Hooking the fan tray assembly 3 Make sure the wire connectors reveal from the right hole and the ...

Страница 59: ...the wire connectors Figure 6 9 Fan tray assembly well connected 4 Connect the fan tray assembly with the inverter by plugging the wire connectors as shown in Figure 6 10 Figure 6 10 Plugging the wire connectors 5 Fix the left side of fan bracket on the Main housing with 2PCS screws ...

Страница 60: ...ide of fan bracket on the Main housing with 2PCS screws as shown in Figure 6 12 Tool 0 12 inch Hexagon socket screw key Figure 6 12 Fixing the fan bracket on the right side 7 Put the two removed panels back and secure the M4 screws on both sides with a torque value of 1 76N M 15 6Lb In as shown in Figure 6 13 Tool PH2 cross screwdriver ...

Страница 61: ...59 Figure 6 13 Securing panels on both sides ...

Страница 62: ...ckers 2 MPPT Voltage Range 300 550Vdc Max Input Current 35Ax2 Number of DC Inputs and Fuses 4 conductors with fuses per each of two MPPT inputs DC Disconnection Type Switch AC Output Rated AC Output Power 20kW Max AC Output Power 20kW Rated Output Voltage 480Vac Output Voltage Range 422 528Vac Grid Connection Type 3 N PE Max AC Output Current 27 3A Rated Output Frequency 60Hz 1 Exceeding the rated...

Страница 63: ...le speed cooling fans Operating Temperature Range 13 F to 140 F 25 C to 60 C derating from 50 C 122 F Operating Humidity 0 95 non condensing Operating Altitude 6562ft 2000m derating from 4921ft 1500m Display and Communication Display LCD LED Communication RS485 Mechanical Dimensions WxHxD 21 4x41 7x8 5in 544x1060x215mm Weight 132lbs 63kg Safety Safety and EMC Standard UL1741 2010 CSA C22 2 NO 107 ...

Страница 64: ...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 ...

Страница 65: ...power com Service Hotline 855 584 7168 Address 700 International Parkway Suite 102 Richardson TX 75081 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 09 MKT PN 9 0020 0038G0 ...

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