SUNNY CENTRAL 500-US - Maintenance Manual
Contents
1. Figure 11 Miniature circuit breaker for the control voltage and the voltage meter Position Description A Miniature circuit breaker for the internal control voltage B Miniature circuit breaker for the voltage meter 1 Open the doors of the inverter cabinet 2 Switch on the miniature circuit breaker for the internal control voltage 3 Switch on the miniature circuit breaker for the voltage meter 4 Close the doors of the inverter cabinet 36 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 4 2 Checking Heating Elements Fans and Hygrostat Risk of burns due to hot surfaces of the heating During the functional test the heating element becomes hot There is a risk of burns if you touch the heating without protective gloves e Do not touch heating elements with bare hands e Wear class 2 personal protective equipment e Always maintain a suitable distance when checking the function of the heating elements i Low humidity If the humidity is below 50 you will not be able to perform the function test since the minimum value of the hygrostat is 50 Figure 12 Positions of heating elements hygrostat and fans Position De2. This davice complies with Part 15 c Up ususteD ears subject fo the condition that this Utility interactive inverter device does not cause harmful LISTED UL 1741 36AN interference AA Figure 3 Type label example Position Description A Type designation B Serial Number G Fabrication version D Production date 4 2 2 Reading Error Messages Before any maintenance you need to read pending error messages from the inverter The error messages may give you clues about possible damaged components The source of the error must be corrected before scheduled maintenance is started 1 Read error messages via the display see the Sunny Central user manual 2 Fix the source of the error see the Sunny Central user manual There are no more error messages 16 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 3 Maintenance under Voltage free Conditions 4 3 1 Disconnecting the Inverter A DANGER Danger to life due to electric shock High voltages are present in the conductive components of the inverter The inverter components are energized Touching components in the inverter can result in severe injuries or death e Before performing any work on the Sunny Central disconnect the inverter and secure it against reconnection e After disconnecting the inverter wait at least ten minutes until the inverter capacitors have discharged completely e
3. Central Inverter SUNNY CENTRAL 500 US Maintenance Manual S C500U eng WH IUS115210 98 4107310 Version 1 0 II SMA America LLC Legal Restrictions Copyright 2012 SMA America LLC All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photographic magnetic or otherwise without the prior written permission of SMA America LLC Neither SMA America LLC nor SMA Solar Technology Canada Inc makes representations express or implied with respect to this documentation or any of the equipment and or software it may describe including with no limitation any implied warranties of utility merchantability or fitness for any particular purpose All such warranties are expressly disclaimed Neither SMA America LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc nor its distributors or dealers shall be liable for any indirect incidental or consequential damages under any circumstances The exclusion of implied warranties may not apply in all cases under some statutes and thus the above exclusion may not apply Specifications are subject to change without notice Every attempt has been made to make this document complete accurate and up to date Readers are cautioned however that SMA America LLC and SMA Solar Technology Canada Inc reserve the right to make changes without notice and shall not be
4. In the case of additional external voltages Disconnect additional external voltages and secure them against accidental re connection A DANGER Danger to life due to electric shock High voltages are present in the conductive components of the inverter The inverter components are energized Touching components in the inverter can result in severe injuries or death e Wait at least ten minutes until the inverter capacitors have discharged completely Open the doors of the interface cabinet and the inverter cabinet Switch off the miniature circuit breaker for the internal control voltage and secure it against being switched back on Switch off the miniature circuit breaker for the voltage meter and secure it against being switched back on Ensure that all poles are free of voltage Ground and short circuit the device Cover or safeguard any adjacent live components Close the doors of the interface cabinet and of the inverter cabinet C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 3 2 Performing the Visual Inspection A thorough visual inspection must be performed before any maintenance work This ensures that inverter components are not damaged and also minimizes potentially hazardous situations i Visual inspection means e Check the inverter for soiling e Check the inverter s enclosure for damage Check components inside the inverter for damage and discoloration e Check the in
5. 1 Remove the ventilation plate from the inverter cabinet To do this grasp under the ventilation plate and press upwards in the middle when removing 2 Clean the ventilation plate using a brush and vacuum 3 Push the ventilation plate into the inverter cabinet The ventilation plate must face the back panel The ventilation plate is flush with the inverter enclosure The ventilation plate does not go all the way in e Grasp the ventilation plate from underneath and press upwards in the middle while pushing it in Maintenance Manual SC500U eng WH IUS115210 23 A Maintenance SMA America LLC 4 3 8 Cleaning the Ventilation Plates of the Magnetics Cabinet NOTICE Impaired air circulation increases the internal temperature and can reduce the electrical endurance of temperature sensitive components The cleaning interval for the ventilation plates depends on the ambient conditions e Clean the ventilation plate more frequently in cases where there is high sand or dust content in the air see maintenance report Requirements O The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 DI The ventilation grids must be removed see Section 4 3 3 Disassembling the Ventilation Grids page 19 1 Flip the flaps of the ventilation plates to the side 2 Remove the ventilation plates from the magnetics cabinet To do this grasp under the ventilation plate and press upw
6. can be ordered via the SMA Service Line Position Color Article number Cabinet surfaces RAL 7045 87 5051314 Roof and base panel RAL 7024 87 505 1313 elements O To repair larger surfaces use touch up paint or alternatively 2K PUR acrylic paint Observe the manufacturer specifications of the touch up paints U Abrasive cloth O Degreaser 1 Remove dirt 2 To remove small area surface damage e Abrade the surface e Clean the surface with a degreaser e Paint the surface 3 To remove large area surface damage e Abrade the surface e Clean the surface with a degreaser e Paint the entire surface Maintenance Manual S C500U eng WH IUS115210 35 A Maintenance SMA America LLC 4 4 Performing Maintenance Work on Inverters with Activated Control Voltage 4 4 1 Connecting the Control Voltage A DANGER Danger to life due to electric shock High voltages are present in the conductive components of the inverter High voltages are present on the inverter and its components Failure to heed this safety message can result in severe or lethal injuries due to electric shock Wear class 2 personal protective equipment Follow the instructions precisely Observe safety messages
7. during maintenance Requirements El The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 DI The front panel of the magnetics cabinet must be disassembled see Section 4 3 4 Disassembling the Front Panel of the Magnetics Cabinet page 20 1 Remove dirt and dust from the interior of the switch cabinet e g DC contactor and AC circuit breaker Electrical components must not be cleaned e g printed circuit boards 2 Remove moisture Check for leaks Correct as necessary 4 If the maintenance is interrupted at this point mount the front panel on the magnetics cabinet see Section 5 2 Mounting the Front Panel of the Magnetics Cabinet page 39 4 3 12 Checking the DC Main Fuses NOTICE Damage to screw connections from over tightening e Only tighten loose screw connections applying the prescribed torque Torque specifications are shown in the circuit diagram of the inverter Contact the SMA Service Line if specifications are missing Requirement DI The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 1 Open the doors of the interface cabinet 2 Remove the acrylic covers Check fuses terminals and insulation for discoloration or changes When checking do not remove the fuses If the fuses terminals or insulation are discolored or changed contact the SMA Service Line 28 C500U eng WH IUS1 15210 Maintenance Manual S
8. or national laws regulations or codes applicable to the installation and use of the product including without limitation applicable electrical safety codes All installations must conform with the laws regulations codes and standards applicable in the jurisdiction of installation SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product Before installing or using the product read all of the instructions cautions and warnings in this manual Before connecting the product to the power distribution grid contact the local utility company This connection must be made only by qualified personnel Wiring of the product must be made by qualified personnel only 6 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC Table of Contents Table of Contents 1 2 2 1 2 2 2 3 2 4 3 3 1 3 2 4 4 1 4 2 4 2 1 4 2 2 4 3 4 3 1 4 3 2 4 3 3 4 3 4 4 3 5 4 3 6 4 3 7 4 3 8 4 3 9 4 3 10 4 3 11 4 3 12 4 3 13 Information on this Document 00 00 9 Safety san an es 10 Iniendedilse ee tiete anaes eal e 10 Qualification of Skilled Persons za ur A 10 Safety Precautions nn 10 Personal Protective Equipment nuanean 13 Product Description u 24u 2 2 02 es 14 SED ER O 14 Control Eleme nisi decree a hoot eig 14 Maintenance sauna ee 15 Maintenance Intervals 222222ceeeee
9. responsible for any damages including indirect incidental or consequential damages caused by reliance on the material presented including but not limited to omissions typographical errors arithmetical errors or listing errors in the content material All trademarks are recognized even if these are not marked separately Missing designations do not mean that a product or brand is not a registered trademark The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG Inc and any use of such marks by SMA America LLC and SMA Solar Technology Canada Inc is under license SMA America LLC 3801 N Havana Street Denver CO 80239 U S A SMA Solar Technology Canada Inc 2425 Matheson Blvd E 8th Floor Mississauga ON LAW 5K5 Canada Maintenance Manual SC500U eng WH IUS1 15210 3 Important Safety Instructions SMA America LLC IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for the following products Sunny Central 500U This manual must be followed during installation and maintenance The product is designed and tested in accordance with international safety requirements but as with all electrical and electronic equipment certain precautions must be observed when installing and or operating the product To reduce the risk of personal injury and to ensure the safe installation and operation of the product you must carefully read and follow all instr
10. up The front panel is loosened from the anchoring 20 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 3 5 Checking the Safety Messages Figure 5 Position of safety messages Position Description A Hazardous voltage inside B Hazardous voltage inside Shock and arc flash explosion hazard Cl Hazardous voltage C2 Risk of elektric shock or electrical energy high current levels D Maximum ambient temperature E Burn hazard F Type label G Burn hazard Requirement The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 i Illegible or missing warning signs There must always be legible warning signs present on the inverter Regularly check to be sure that all warning signs are present and undamaged Immediately replace missing faded or damaged warning signs e Replace missing or damaged safety messages and stickers In the case of missing or damaged safety messages or stickers contact the SMA Service Line Maintenance Manual SC500U eng WH IUS115210 21 4 Maintenance SMA America LLC 4 3 6 Removing and Mounting the Condensate Drain The condensate drains mounted in the inverter enable the drainage of moisture to the
11. 10 13 3 Product Description SMA America LLC 3 Product Description 3 1 Setup A B Cc oo D a mn D E E Figure 1 Design of the Inverter Position Description A Magnetics cabinet B Inverter cabinet Interface cabinet D Insect screen E Ventilation grid 3 2 Control Elements Figure 2 Display and key switch Position Description A Display B Key Switch 14 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 Maintenance 4 1 Maintenance Intervals Observance of maintenance intervals ensures trouble free operation of the Sunny Central Maintenance intervals depend on ambient and operating conditions Under especially harsh ambient conditions certain maintenance tasks must be performed more frequently These maintenance tasks are listed in the maintenance report SMA recommends a monthly optical inspection in order to determine the need for maintenance Under normal ambient and operating conditions the Sunny Central must be fully serviced at the following intervals Maintenance under normal ambient and operating conditions Description Interval Routine maintenance Every 24 months Retighten the power cable connection by using a Every 12 months cage clamp Unscheduled maintenance After each AC short circuit or in case of unusual events such as smell smoke or nois
12. 500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 2 Safety Electrical Hazards A DANGER Electric shock due to live voltage High voltages are present on the inverter and its components Some maintenance work must be carried out with voltage present Failure to adhere to the safety messages may lead to severe or lethal injuries due to electric shock e Wear class 2 personal protective equipment e Always perform work in compliance with the regulations specified in 29 CFR Chapter XVII Part 1910 OSHA NEC and NFPA 70E Do not touch any live components in the inverter or on the medium voltage grid e Follow the instructions precisely e Observe safety messages e Before performing any work on the inverter always disconnect the inverter if voltage is not absolutely necessary e After disconnecting the inverter wait at least ten minutes until the inverter capacitors have discharged completely e Before performing work on the inverter ensure that no voltage is present Electric shock caused by ground fault If a ground fault has occurred parts of the plant that are supposedly grounded may in fact be live Failure to adhere to the safety messages may lead to severe or lethal injuries due to electric shock e Ensure that no voltage is present before touching any components e Wear class 2 personal protective equipment Electric shock due to damaged inverter Operating a damaged inverter can lead to hazardous
13. Contact the SMA Service Line if specifications are missing Maintenance Manual SC500U eng WH IUS115210 31 4 Maintenance SMA America LLC NOTICE Inadequate screw connections due to harsh ambient conditions e Check the screw connections for discoloration or changes more frequently in the case of significant daytime temperature differences see maintenance report Requirements EI The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 DI The front panel of the magnetics cabinet must be disassembled see Section 4 3 4 Disassembling the Front Panel of the Magnetics Cabinet page 20 Figure 9 Overview of the screw connection of the interface cabinet Position Description A AC connection B DC connection ee Figure 10 Overview of the screw connection of the power cabling in the magnetics cabinet and the inverter cabinet 32 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance Position Description A Connection of the transformer B Termination points on the inverter bridge 1 Disassemble the protective covers 2 Tighten the screw connections with cage clamps using a torque wrench Torque 42 f
14. Ensure that no voltage is present e Wear class 2 personal protective equipment e Follow the instructions precisely e Observe safety messages a T AJA l s Ae zH Figure 4 Miniature circuit breaker for the control voltage and the voltage meter Position Description A Miniature circuit breaker for the internal control voltage B Miniature circuit breaker for the voltage meter Maintenance Manual SC500U eng WH IUS1 15210 17 4 Maintenance SMA America LLC 1 11 12 13 14 Set the key switch of the inverter to Stop Check whether the DC and AC contactors audibly shut off within five seconds or less If the DC and AC contactors do not audibly shut off within five seconds or less contact the SMA Service Line Disconnect the inverter from the DC side of the PV array via the external DC disconnecting device and ensure that it cannot be reconnected When using the Disconnect Unit Disconnect the AC and DC sides using the Disconnect Unit s disconnect switch and ensure that it cannot be reconnected see the Disconnect Unit installation manual Disconnect the AC voltage using an external AC disconnection and secure it against accidental re connection
15. MA America LLC 4 Maintenance 4 Check whether the mark on the screw connections of the fuses is in the right place If the mark on the screw connections is not in the right place retighten the screw connection see the inverter s circuit diagram for the torque specification Contact the SMA Service Line in the event of damage or changes 5 Check whether discolorations can be seen on the screw connections of the fuses If discolorations can be seen on the screw connections contact the SMA Service Line 6 Mount the acrylic covers Close the doors of the interface cabinet Maintenance Manual SC500U eng WH IUS115210 29 4 Maintenance SMA America LLC 4 3 13 Checking the Connection of Power Cables Using Terminal Lugs Optional NOTICE Damage to screw connections from over tightening e Only tighten loose screw connections applying the prescribed torque Torque specifications are shown in the installation manual of the inverter Contact the SMA Service Line if specifications are missing Requirements El The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 DI The front panel of the magnetics cabinet must be disassembled see Section 4 3 4 Disassembling the Front Panel of the Magnetics Cabinet page 20 U Ae lel le el lel fe le el le el Figure 7 Overview of the screw c
16. ance Manual SC500U eng WH IUS115210 25 4 Maintenance SMA America LLC 4 3 10 Cleaning the Air Duct and Insect Screens NOTICE Impaired air circulation increases the internal temperature and can reduce the electrical endurance of temperature sensitive components The cleaning interval for the air duct and insect screen depends on the ambient conditions e Clean the air duct and insect screen more frequently in cases where there is high sand or dust content in the air see maintenance report Requirement O The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 1 Undo the screws on the insect screen 26 C500U eng WH IUS115210 Maintenance Manual SMA America LLC 4 Maintenance 2 Pull the bottom of the insect screen to the front This removes the insect screen 3 Clean the air duct from the outside d l Clean the insect screens using a brush 5 Vacuum the insect screens 6 Check the insect screens for visible damage M Insect screens are not damaged X Are the insect screens damaged e Replace damaged insect screens 7 Insert the insect screens 8 Screw the insect screens into place Torque 177 in Ibs 20 Nm Maintenance Manual SC500U eng WH IUS115210 27 4 Maintenance SMA America LLC 4 3 11 Cleaning the Inside of the Switch Cabinet The switch cabinets of the magnetics cabinet the inverter cabinet and the interface cabinet must be cleaned
17. ards in the middle when removing 3 Clean the ventilation plates using a brush and vacuum 4 Push the ventilation plates into the magnetics cabinet The ventilation plates are positioned flush with the enclosure of the magnetics cabinet The ventilation plates get stuck when sliding them ine e Grasp the ventilation plates from underneath and press upwards in the middle while pushing 24 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 5 Fold the flaps of the ventilation plates to the inside 4 3 9 Cleaning the Ventilation Grids NOTICE Impaired air circulation increases the internal temperature and can reduce the electrical endurance of temperature sensitive components The cleaning interval for the ventilation grids depends on the ambient conditions e Clean the ventilation grids more frequently in cases where there is high sand or dust content in the air see maintenance report Requirements O The inverter is disconnected see Section 4 3 1 Disconnecting the Inverter page 17 O The ventilation grids are removed see Section 4 3 3 Disassembling the Ventilation Grids page 19 1 Clean the ventilation grids using a brush 2 Vacuum the ventilation grids Check the ventilation grids for visible damage The ventilation grids are not damaged The ventilation grids are damaged Replace damaged ventilation grids 4 Mount the ventilation grids Mainten
18. e e Contact the SMA Service Line Preventive replacement intervals Description Interval GFDI Soft Grounding After 100 trippings ABB High Performance Circuit Breaker Contact the SMA Service Line Fan 10 years e Contact the SMA Service Line 4 2 Preparing for Maintenance 4 2 1 Identifying the Inverter You can identify the inverter by its type label You can find the type label on the bottom plate of the magnetics cabinet and on the inside of the inverter cabinet Maintenance Manual S C500U eng WH IUS115210 15 4 Maintenance SMA America LLC SMA Solar Technology AG www SMA de ze SUNNY CENTRAL A Model SC500U ER oe B Serial No XXXXXXAAAXX Fabrication Version XX Date of manufacture weer c Max continuous output Power XXN Wac Operating voltage range Vac 3 Phase Min Nominal XXX XXX D Operating frequency range Hz Min Nominal XXX XXX XXX Max continuous output current XXX X Aac Output power factor XXX XXX Range of input operating voltage XXX XXX Vdc Input start range XXX Vde Max array system voltage XXX Vdc MPPT Range of operating DC voltage XXX XXX Vdc Max operating current XXXX Ade This unit is provided with an integral DC Ground Fault Detector Interruptor ENCLOSURE Type 3R IP54 For more details and for tightening torque allowable wire size and type see the Operator s Manual
19. eeen 15 Preparing for Maintenance set peak ei 15 Identifying the Inverter o unuunu uuna er renere 15 Reading Error Messages 0 c eect cent eee 16 Maintenance under Voltage free Conditions 17 Disconnecting the Inverter 2 0 00 17 Performing the Visual Inspection 00 cece eects 19 Disassembling the Ventilation Grids 00000000 cee eee eee 19 Disassembling the Front Panel of the Magnetics Cabinet 20 Checking the Safety Messages 0 00 00 e cece eee eee eee aes 21 Removing and Mounting the Condensate Drain 0006 22 Cleaning the Ventilation Plate of the Inverter Cabinet 23 Cleaning the Ventilation Plates of the Magnetics Cabinet 24 Cleaning the Ventilation Grids 1 0 0 0 eee eee 25 Cleaning the Air Duct and Insect Screens 2 222222222222 26 Cleaning the Inside of the Switch Cabinet 00 000 e eee 28 Checking the DC Main Fuses 0 0000 c eee e eee eee 28 Checking the Connection of Power Cables Using Terminal Lugs Optional 30 Maintenance Manual C500U eng WH IUS115210 7 Table of Contents SMA America LLC 4 3 14 4 3 15 4 3 16 4 3 17 4 3 18 4 4 4 4 1 4 4 2 5 1 5 2 5 3 Retightening the Connection of the Power Cables Using Cage Clamps Optional nasede been aeea a han nr hd 31 Checking the Door Sealsi imera arae a 2 re 33 Checking the Locking Device
20. ings Symbol Description Warning regarding dangerous voltage The product works with high voltages All work on the product must only be performed as described in the documentation of the product Electric arc hazards The product has large electrical potential differences between its conductors Arc flashes can occur through air when high voltage current flows Do not work on the product during operation Beware of hot surface The product can become hot during operation Do not touch the product during operation Observe the operating instructions Read the documentation of the product before working on the product Follow all safety precautions and instructions as described in the documentation Evaluated to the requirements of the Underwriters Laboratories Standard for Safety for Inverters Converters Controllers and Interconnection System Equipment for Use With Distributed Energy Resources UL 1741 O gt ee The inverter has been additionally evaluated by Underwriters Laboratories to CAN CSA C22 2 No 107 1 1 General Use Power Supplies Maintenance Manual SC500U eng WH IUS1 15210 5 General Warnings SMA America LLC General Warnings General Warnings All electrical installations must conform with the local and National Electrical Code ANSI NFPA 70 or the Canadian Electrical Code CSA C22 1 This document does not and is not intended to replace any local state provincial federal
21. l the Sunny Central 500U is also referred to as Sunny Central or the inverter In this manual SMA America Production LLC and SMA Solar Technology Canada Inc are hereinafter referred to jointly as SMA Abbreviations Abbreviations Designation Explanation AC Alternating Current DC Direct Current GFDI Ground Fault Detection Interruption PE Protective Earth Protective conductor PY Photovoltaics Maintenance Manual S C500U eng WH IUS115210 2 Safety SMA America LLC 2 Safety 2 1 Intended Use The Sunny Central is an inverter that changes direct current obtained from PV modules into alternating current when the DC input voltage is between 330 V and 600 V and when the permissible ambient conditions are adhered to The Sunny Central is suitable for operation in outdoor areas The Sunny Central meets NEMA 3R protection class standards and can also be operated in rain snow and sleet Only persons fulfilling all of the skills for the target group may work on or with the Sunny Central Intended use also includes observance of the service and maintenance intervals specified in this document All work on the Sunny Central must be performed using the appropriate tools In order to ensure that the Sunny Central is used as intended this documentation must be read and all safety precautions and messages must be duly noted and followed For safety reasons it is forbidden to modify the p
22. onal maintenance material that is required but not included in the delivery O A suitable waterfree heat resistant lubricant e g WDAO 1 Check whether the latching action is smooth Open and shut the doors several times in the process If the doors do not latch easily lubricate all moving parts of the latch 2 Check whether the doors can be held in place If the doors cannot be held in place lubricate the door stops 3 Check whether the door hinges move easily If the door hinges do not move easily lubricate them 4 Lubricate all moving latch elements and movement points 4 3 17 Checking the Surface of the Switch Cabinet Requirement o l 2 34 The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 Clean the outside walls of the inverter Check surfaces for damage or corrosion If surfaces are damaged repair them If surfaces show corrosion remove the corrosion S C500U eng WH IUS115210 Maintenance Manual SMA America LLC 4 Maintenance 4 3 18 Checking the Switch Cabinet for Corrosion Requirement El The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 Additional maintenance material that is required but not included in the delivery El To seal small areas use touch up sticks paint brushes or spray paint cans or alternatively 2K PUR acrylic paint Observe the manufacturer specifications of the touch up paints Touch up paint
23. onnection of the interface cabinet Position Description A AC connection B DC connection 30 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance Figure 8 Overview of the screw connection of the power cabling in the magnetics cabinet and the inverter cabinet Position Description A Connection of the transformer B Termination points on the inverter bridge 1 Check whether all screw connections for the power cables are tight If screw connections are loose tighten them with a torque wrench 2 Check insulation and connections for discoloration and changed appearance If insulation and connections are discolored or changed contact the SMA Service Line 3 Check screw connections for damage and contact elements for corrosion If screw connections are damaged or contact elements are corroded contact the SMA Service Line 4 Mount the front panel of the magnetics cabinet see Section 5 2 Mounting the Front Panel of the Magnetics Cabinet page 39 4 3 14 Retightening the Connection of the Power Cables Using Cage Clamps Optional NOTICE Damage to screw connections from over tightening Only apply the prescribed torque to tighten screw connections with the cage clamp option Torque specifications are shown in the inverter installation manual
24. outside The condensate drain in the inverter cabinet must be removed before removing and cleaning the ventilation plate A B Figure 6 Positions of the condensate drains in the bottom of the inverter Position Description A Condensate drain in the inverter cabinet B Condensate drain in the interface cabinet Remove each condensate drain in accordance with the following procedure 1 Unscrew the condensate drain from below and remove it 2 Ifthe condensate drain is soiled clean it 3 After mounting the ventilation plate reinstall the condensate drain 22 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 4 Maintenance 4 3 7 Cleaning the Ventilation Plate of the Inverter Cabinet NOTICE Impaired air circulation increases the internal temperature and can reduce the electrical endurance of temperature sensitive components The cleaning interval for the ventilation plate depends on the ambient conditions e Clean the ventilation plate more frequently in cases where there is high sand or dust content in the air see maintenance report Requirements O The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 DI The ventilation grids must be removed see Section 4 3 3 Disassembling the Ventilation Grids page 19 ED The condensate drain must be removed see Section 4 3 6 Removing and Mounting the Condensate Drain page 22
25. roduct or install components that are not explicitly recommended for this product or distributed by SMA The Sunny Central must not be operated with its doors open The Sunny Central may not be opened when it is raining or when humidity exceeds 95 The Sunny Central may only be operated when it is in perfect working order This must be ensured by observance of the service and maintenance intervals specified in this document In addition the maintenance work that has been performed must be documented by the customer in the maintenance report including photos Any use of the Sunny Central other than that described in this section is not regarded as intended use 2 2 Qualification of Skilled Persons A qualified person has been adequately trained and has demonstrated the ability and knowledge to operate and maintain the device Qualified persons have been trained in how to deal with the dangers and risks associated with installing electrical installations as specified in 29 CFR Chapter XVII Part 1910 OSHA NEC and NFPA 70E and possess all the necessary knowledge for averting danger There must be written documentation of their training 2 3 Safety Precautions This section contains safety precautions that must always be observed during work on or with the Sunny Central To prevent personal injury and property damage and to ensure long lasting operation of the Sunny Central read this section carefully and follow the instructions 10 SC
26. s 95 e Only perform maintenance work on the inverter when the environment is dry and free of dust Mechanical Hazards Risk of fire due to failure to observe torque specifications Failure to observe the torque specifications indicated in the installation manual reduces the ampacity of the screw connections This can cause components to overheat and catch fire e Always use the torques specified in the installation manual e Regularly check that mounted components have always been set at the torque specified in the installation manual 12 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 2 Safety Thermal Hazards Risk of burns due to hot components The components of the inverter can get very hot Touching these components can result in burns Do not touch hot components Wait until hot components have sufficiently cooled down Observe safety messages in the inverter Wear class 2 personal protective equipment 2 4 Personal Protective Equipment After the control voltage has been switched on personal protective equipment is required for all work performed The protective equipment must comply with the requirements of NFPA 7OE The customer must ensure that external measures limit incident energy levels to PPE level 2 in conformance with IEEE1584 Any protective equipment mandated by law or otherwise required must be used as well Maintenance Manual SC500U eng WH IUS1 152
27. s and Hinges 222222200 34 Checking the Surface of the Switch Cabinet 2222222220 34 Checking the Switch Cabinet for Corrosion 000000 e eee eee 35 Performing Maintenance Work on Inverters with Activated Control MONG Es cca een eu ee elie Paste TA Rah he ncn yoy Wea hen 36 Connecting the Control Voltage 0 eee eee eee 36 Checking Heating Elements Fans and Hygrostat 00 37 Restarting the System e eee e eee eens 39 Mounting the Ventilation Grid 0 00002 eee 39 Mounting the Front Panel of the Magnetics Cabinet 39 Recommissioning the Inverter 0 000 e eee ee ee 40 CONTAC sense 41 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 1 Information on this Document 1 Information on this Document This manual describes the service and maintenance of the Sunny Central 500U 500 US Validity This manual is valid for the SC500U Target Group This manual is intended for qualified skilled workers Only skilled persons are allowed to perform any tasks set forth in this document see Section 2 2 Qualification of Skilled Persons page 10 Additional Information Additional information is available at www SMA America com Title Document type Installation requirements for Sunny Central 500U Technical information Installation Manual Disconnect Unit Installation manual Nomenclature In this manua
28. scription A Fan B Hygrostat Heating element Requirements O Control voltage must be present O There must be no disturbances here Maintenance Manual SC500U eng WH IUS115210 37 4 Maintenance SMA America LLC 1 38 Switch the inverter to Stop Open the doors of the inverter cabinet Set the hygrostat in the inverter cabinet low enough that the heating element switches on Check whether the heating element begins to radiate heat after approximately five minutes If the heating element does not switch on contact the SMA Service Line Check whether the fan starts to run If the fan does not start running contact the SMA Service Line Turn the hygrostat in the inverter cabinet back to its initial position TIP the hygrostat is set correctly when the white bar on the hygrostat s regulator is horizontal Close the doors of the inverter cabinet SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 5 Restarting the System 5 Restarting the System 5 1 Mounting the Ventilation Grid 1 Make sure that no animals have entered the cabinet area 2 Screw the grounding cables to the ventilation grids Torque 71 in Ibs 8 Nm 3 Mount the ventilation grids 5 2 Mounting the Front Panel of the Magnetics Cabinet 1 Make sure that no animals have entered the cabinet area 2 Position the front panel at an angle and hang it in the anchoring 3 Fa
29. situations that result in serious injuries or death due to electric shock e Operate the inverter only if it is in safe and full working order e Operate the inverter only if there is no visible damage Regularly check for visible damage Make sure that all external safety equipment is freely accessible at all times Make sure that all safety equipment is in good working order Maintenance Manual C500U eng WH IUS115210 11 2 Safety SMA America LLC NOTICE Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components e Observe the ESD safety regulations when working on the device e Wear class 2 personal protective equipment e Neutralize any electrostatic charge before touching electronic components for example by touching the PE connection of the doors Environmental Hazards Danger to life due to blocked escape routes In hazardous situations blocked escape routes can lead to serious injury or death e An escape route at least 3 ft 915 mm wide must be available at all times Do not place any objects in the escape route area Remove all tripping hazards from the escape routes NOTICE Damage to the inverter caused by dust or moisture penetration Dust intrusion or moisture penetration can damage the inverter or impair its functionality Do not open the inverter when it is raining or when humidity exceed
30. sten the PE connection to the front panel Torque 71 in Ibs 8 Nm 4 Tighten the front panel on the magnetics cabinet Torque 53 5 in Ibs 6 Nm Maintenance Manual C500U eng WH IUS115210 39 5 Restarting the System SMA America LLC 5 3 Recommissioning the Inverter e Commission the inverter see inverter installation manual 40 C500U eng WH IUS1 15210 Maintenance Manual SMA America LLC 6 Contact 6 Contact If you encounter technical problems with our products contact the SMA Service Line We require the following information in order to provide you with the necessary assistance e Device type Serial Number e Fabrication version e Installation address with GPS coordinates e Plant name e Photos of defective components e Type and number of connected PV modules SMA Solar Technology America LLC 6020 West Oaks Blvd Ste 300 Rocklin CA 95765 Tel 1 916 625 0870 Tel 1 877 MY SMA TECH Tel 1 877 697 6283 Toll free available for USA Canada and Puerto Rico Fax 1 916 625 0871 Service SMA America com www SMA America com SMA Solar Technology Canada Inc 2425 Matheson Blvd E 8th Floor Mississauga ON LAW 5K5 Canada Tel 1 877 506 1756 Toll free available for Canada Service SMA Canada ca www SMA Canada ca Maintenance Manual S C500U eng WH IUS115210 41 SMA Solar Technology www SMA Solar com SMA America LLC www SMA America com
31. t lbs 57 Nm 3 Check insulation and connections for discoloration and changed appearance If insulation and connections are discolored or changed contact the SMA Service Line 4 Check screw connections for damage and contact elements for corrosion If screw connections are damaged or contact elements are corroded contact the SMA Service Line 5 Mount the protective covers 4 3 15 Checking the Door Seals There are seals on the doors of the switch cabinets and at the front panel of the magnetics cabinet Requirement DI The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 Additional maintenance material that is required but not included in the delivery O To lubricate use a suitable water free heat resistant lubricant 1 Check whether the seals in the sealing area show any damage Tip The sealing area must be hidden when the door is closed If seals are damaged contact the SMA Service Line 2 Maintain seals with talcum petroleum jelly or wax This prevents frost damage If the side panels are disassembled Check whether the seals in the side panels show any damage in the sealing area If seals are damaged contact the SMA Service Line Maintenance Manual C500U eng WH IUS115210 33 4 Maintenance SMA America LLC 4 3 16 Checking the Locking Devices and Hinges Requirement El The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 Additi
32. uctions cautions and warnings in this manual Warnings in this document A warning describes a hazard to equipment or personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the SMA equipment and or other equipment connected to the SMA equipment or personal injury Symbol Description A DANGER DANGER indicates a hazardous situation which if not avoided will result in death or serious injury WARNING indicates a hazardous situation which if not avoided could result A WARNING in death or serious injury CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE is used to address practices not related to personal injury 4 SC500U eng WH IUS1 15210 Maintenance Manual SMA America LLC Important Safety Instructions Other symbols in this document In addition to the safety and hazard symbols described on the previous pages the following symbols are also used in this manual Symbol Description Indicates information that is important for a specific topic or objective but is not safety relevant Indicates a requirement for meeting a specific goal Desired result xalo A problem that could occur Markings on this product The following symbols are used as product markings with the following mean
33. verter for loose component parts e Check metal components for visible oxidation e Check components for soot from overheating 1 Disconnect the inverter on the AC and DC sides see Section 4 3 1 Disconnecting the Inverter page 17 2 Fix any deficiencies discovered during the visual inspection 4 3 3 Disassembling the Ventilation Grids Requirement U The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 i Grounding cables on the ventilation grids The ventilation grids are connected to the inverter via grounding cables 1 Undo the screws on the two ventilation grids Pull the ventilation grids to the front Disconnect the PE connection from the ventilation grids RON Remove the ventilation grids Maintenance Manual SC500U eng WH IUS115210 19 4 Maintenance SMA America LLC 4 3 4 Disassembling the Front Panel of the Magnetics Cabinet Requirement O The inverter has to be disconnected see Section 4 3 1 Disconnecting the Inverter page 17 i Grounding cable on the front panel of the magnetics cabinet The front panel is connected to the magnetics cabinet via a grounding cable 1 Undo the screws on the front panel of the magnetics cabinet 2 Pull the front panel at the bottom to the front Disconnect the PE connection between the front panel and the magnetics cabinet 3 Remove the front panel In doing so pull the front panel to the front and lightly lift it
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