SUNNY CENTRAL 500HE-US/CA
Contents
1. Figure 5 Location of safety messages on device Designation Hazardous voltage inside Hazardous voltage inside C Operating the Sunny Central without transformer causes a short circuit and can destroy the Sunny Central Hazardous voltage BURN HAZARD max 600 V PV max 600 V PV eee I Oo o i io A B C 200 V 60 Hz Optional e Disconnecting the inverter see 4 3 1 Disconnecting the Inverter page 19 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 22 SC5OQOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance 4 3 3 Disassembling the Panels il Grounding cables on the kick plates Grounding cables connect the panels with the inverter Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 1 Undo the screws on the two front panels 2 Pull the panels toward the front 3 Detach the equipment grounding connection between the panel and the connection cabinet A Remove the panels 4 3 4 Cleaning the Air Baffle NOTICE Impaired air circulation increases the internal temperature and can reduce the electrical endurance of temperature sensitive components The cleaning interval for the air baffle is dependent on the ambient conditions e Clean the air baffle more frequ2. Central Inverter SUNNY CENTRAL 500HE US CA Maintenance Manual SC5OOHEUS eng WH IUS120411 98 4103011 Version 1 1 Coa Cus 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
3. 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 A Beware of hot surface The product can become hot during operation Do not touch the product during operation Observe the operating instructions BA Read the documentation of the product before working on it Follow all safety precautions and instructions as described in the documentation C US Safety for Inverters Converters Controllers and Interconnection System D Evaluated to the requirements of the Underwriters Laboratories Standard for Equipment for Use With Distributed Energy Resources UL 1741 The inverter has been additionally evaluated by Underwriters Laboratories to CAN CSA C22 2 No 107 1 1 General Use Power Supplies Maintenance Manual SC500HEUS eng WH IUS 12041 1 5 General Warnings SMA America LLC General Warnings General Warnings All electrical installations must be done in accordance 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 or national laws regulations or codes applicable to the installation and use of
4. LLC If you encounter technical problems with our products contact the SMA Service Line We require the following data 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 the PV modules connected 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 Canad Tel 1 877 506 1756 Toll free available for Canada Service SMA Canada ca www SMA Canada ca 44 SC500HEUS eng WH IUS 12041 1 Maintenance Manual SMA Solar Technology www SMA Solar com SMA America LLC www SMA America com
5. area e 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 exceeds 95 e Perform maintenance on the Sunny Central only when the environment is dry and free of dust Hazards Due to Human Error Danger to life due to electric shock when inverter is unlocked Unlocked inverters can be opened by unauthorized persons This means that unauthorized persons have access to component parts on which lethal voltages are present e Ensure that unauthorized persons have no access to the inverter e Always lock the inverter Maintenance Manual SCS5QOOHEUS eng WH IUS 12041 1 13 2 Safety SMA America LLC Mechanical Hazards Risk of fire due to failure to observe torque specifications Failure to follow the torque specifications indicated in the installation manual reduces the ampacity of the screw connections This can cause component parts 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 Danger from illegible or missing warning signs Warning signs on the Sunny Central warn operators about hazardous areas and must always be present and legible
6. dust from the interior of the switch cabinet and from all assemblies e g DC contactor and AC circuit breaker Remove moisture Check for leaks Correct as necessary 4 3 7 Cleaning the Heating Elements of the Low Temperature Area Option Optional Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Figure 6 Heating element locations 1 Disassemble the protective covers 2 Remove dirt and dust from the heating elements with a cleaning cloth 3 Remove moisture with a cleaning cloth 4 Mount the protective covers 4 3 8 Checking the DC Main Fuses NOTICE Damage to screw connections from over tightening e Only tighten loose screw connections with the prescribed torque Torque specifications are shown in the inverter s circuit diagram Contact the SMA Service Line if specifications are missing 28 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance Requirement C The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Remove the plexiglass covers 2 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 3 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
7. 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 non compliance 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 electrical utility 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 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC Table of Contents 1 2 2 1 2 2 2 3 2 4 3 3 1 3 2 4 4 4 2 4 2 1 4 2 2 4 2 3 4 3 4 3 1 4 32 4 3 3 4 3 4 4 3 5 4 3 6 4 3 7 4 3 8 4 3 9 4 3 10 Target Audience Skils ooecte iwi she eeeheagsenesad Personal Protective Equipment 0 0 00 cee eee Safety Precautions nna cemeew eas aden seeded tees Product Description 20 c cece cece eee ee eens Design of the Inverter 0 0 0 ccc eee User Interface een Maintenance cccccccccccccccccccecccees Maintenance Intervals 000 ccc cece eee eee eenns Preparing for Maintenance 0 c eee eee Identifying the Inverter 0 0 ete eens Redding Error Messages 2 bed
8. 0 TIP the hygrostat is set correctly when the white bar on the hygrostat s regulator is horizontal 8 Mount the heating element s protective cover Close the doors of the connection cabinet 4 4 4 Checking the Heating Elements of the Low Temperature Area Option Optional Risk of burns due to the heating element s hot surfaces During the functional test the heating element becomes hot There is a risk of burns if you touch the heating element without protective gloves e Do not touch heating elements with bare hands e Wear personal protective equipment e Always check the function of heating elements from an adequately safe distance Requirements O Control voltage is present Q There are no problems 40 SC500HEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance eee T Zn ec aa 3 g Figure 13 Position of the low temperature option controls Designation Heating elements of the low temperature option Terminal plug for heating control Heating elements of the low temperature option 1 Switch the Sunny Central to Stop 2 Open the doors of the connection cabinet 3 Open the doors of the inverter cabinet 4 Disass
9. K PUR acrylic paint in the corresponding RAL color Note the paint manufacturer s instructions Position RAL color Article number Enclosure RAL 9016 87 5051310 Roof RAL 7004 87 5051311 Base RAL 7005 87 5051312 LI Abrasive cloth O Degreaser Remove dirt 2 For small scale damage treat the affected area as follows e Scour the surface e Clean the surface with degreaser e Paint the surface 3 For extensive damage treat the entire area as follows e Scour the surface e Clean the surface with degreaser e Paint the entire surface 36 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance 4 4 Performing Maintenance Work on Inverters with Activated Control Voltage This section describes maintenance of the Sunny Central when the control voltage is switched on The inverter s component parts are energized During the maintenance tasks described in this section it may be necessary to turn the inverter off and then back on several times 4 4 1 Connecting the Control Voltage DANGER Electric shock from live voltage High voltages are present in the inverter and its component parts Failure to heed this safety message can result in severe or lethal injuries due to electric shock e Wear personal protective equipment e Follow instructions precisely Observe safety messages Figure 11 Position of the
10. Voltage 2 0 ccc een een 37 Checking the AC Circuit Breaker weet eine ie head oh ea deka tes 38 Checking Heating Elements Fans and Hygrostat 2 22222222 38 Checking the Heating Elements of the Low Temperature Area Option OBIORA aa Rees Anon Aetnnsoes ar NISE EPET E ee 40 Moounlingithe Panelszs 2u 32222e8B 1 aaa 43 CONIGGD van au 44 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 1 Notes on this Document 1 Notes on this Document This manual describes the service and maintenance of the Sunny Central 500HE US CA Validity This manual is valid for the Sunny Central 500HE US CA Target Audience This manual is intended for qualified skilled workers Only qualified personnel are allowed to perform the tasks described in this manual see Section 2 2 Target Audience Skills page 10 Additional Information Additional information is available at www SMA America com Sunny Central S00HE US CA User Manual Sunny Central S00HE US CA Installation Manual Installation manual Installation Manual Disconnect Unit Installation manual Nomenclature In this manual the Sunny Central SOOHE US CA is also referred to as the 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 Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 7 2 Safety SMA America LLC 2 Safety This section describes general
11. a ne cad de teed ili abe est Performing Visual INSECHON 2 lt 3 ui 0i0 courdedsiaiwedasasce cages s Maintenance under Dead Conditions 2 2 Disconnecting the Inverter cece ndent en bab beats Checking Safety Messages n 20 2 ie Disassembling the Panels nnn acm annann Cleaning ne Air Bae 1 2er AEA Cleaning the Air Duct and Insect Screen 00 0 cece ene Cleaning the Inside of the Switch Cabinet 000 0 e eee Cleaning the Heating Elements of the Low Temperature Area Option Opona ae dus oh ets ak ea mae ein Soreness Checking the DC Main Fuses ae dei Checking the Surge Arresters Optional 00 00 c eee eee Checking the Connection of the Power Cables Using Terminal Lugs ODIONOla siti En er see none eee nets Maintenance Manual SCSOOHEUS eng WH IUS 12041 1 Table of Contents Table of Contents SMA America LLC 4 3 11 4 3 12 4 3 13 4 3 14 4 3 15 4 4 4 4 1 4 4 2 4 4 3 4 4 4 Retightening the Connection of the Power Cables Using Cage Clamps ODHOMGN ess eera aaa E d 32 Checking the Seals on Doors 0 ccc nnna 34 Checking Locking Devices Door Stops and Hinges 35 Checking the Surface of the Switch Cabinet 0 000000 eens 36 Checking the Switch Cabinet for Corrosion 2 0 0 00 cee eens 36 Performing Maintenance Work on Inverters with Activated Control Voltages ss o sc4 sau owns eed eee ee saa 37 Connecting the Control
12. abinet Additionally the serial number can be found on the roof of the inverter at the top left SMA Solar Technology AG www SMA de SUNNY CENTRAL Model I SC5OOHE US xXXXXXXXXXXXXXXXXXX B Serial No XXXXXXXXX ne Fabrication Version XXX Fabrication Date I Max Continuous output Power Operating voltage range Vac 3 Phase Min XXX Nominal XXX Operating frequency range Hz Min XXX Nominal XX X XX X Max continuous output current xxx xAac Output power factor X XX Range of input operating voltage xxx xxx Vde D Input start range xxx Vde Max array system voltage xxx Vde MPPT Range of operating DC voltage xxx xxx Vde Max operating current xxx Adc The unit contains DC Ground and Fault Detector and Interruptor ENCLOSURE Type 3R IP54 For more details and for tightening torque allowable wire size and type see the Operator s Manual c UL Jus usteo Utility interactive inverter LISTED UL 1741 36AN BH Figure 3 Layout of the type label example Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 17 4 Maintenance SMA America LLC Postion Designation Explanation SSCS B Serial No Inverter serial number Fabrication Date Date of manufacture D Pevicesspecific characteristics 4 2 2 Reading Error Messages Before any maintenance you need to read pending error messages fro
13. al 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 and also with photos Any use of the Sunny Central other than what is described in this section is not regarded as intended use 2 2 Target Audience Skills A qualified skilled person has been adequately trained and has demonstrated the ability and knowledge to operate and maintain the device A qualified skilled person has been trained in how to deal with the dangers and risks associated with installation of electrical equipment as specified in 29 CFR Chapter XVII Part 1910 OSHA NEC and NFPA 70E and has all the necessary knowledge for averting danger There must be written documentation of the training 10 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 2 Safety 2 3 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 IEEE 1584 Protective equipment required by legal regulatio
14. e Regularly check to be sure that all warning signs are present and undamaged e Immediately replace missing faded or damaged warning signs Thermal Hazards Risk of burns due to hot component parts The component parts of the Sunny Central can become very hot Touching these component parts can lead to burn injuries Do not touch hot component parts Wait until hot component parts have sufficiently cooled down Observe safety messages in the Sunny Central Wear class 2 personal protective equipment 14 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 3 Product Description 3 Product Description This section will give you an overview of the Sunny Central 500HE US CA and its components 3 1 Design of the Inverter o o o o o o C A D C Figure 1 Design of the inverter Position Designation Inverter cabinet Insect screen air intake area Connection cabinet for customer interfaces Connection cabinet for AC and DC power cables Ventilation grid air outlet 3 2 User Interface Figure 2 Display and key switch Designation Maintenance Manual SC5OQOHEUS eng WH IUS 12041 1 15 4 Maintenance SMA America LLC 4 Maintenance This section includes all necessary information for performing maintenance work on the Sunny Central 4 1 Maintenance Intervals Observance of maintenance intervals ensu
15. emble the protective covers Maintenance Manual SCS5QOHEUS eng WH IUS 12041 1 Al 4 Maintenance SMA America LLC 5 Pull out the terminal plug for the heating control VI A contactor audibly switches off the inverter After about 2 minutes another contactor audibly switches off the control voltage What if the switching of the contactors is not audible e Contact the SMA Service Line 6 Check whether the heating elements radiate heat after a delay time of 5 minutes If the heating element does not radiate heat contact the SMA Service Line 7 Insert the terminal plug for the heating control M A contactor audibly switches on the control voltage After about 2 minutes another contactor audibly switches on the inverter What if the switching of the contactors is not audible e Contact the SMA Service Line 8 Mount the protective covers 9 Close the doors of the connection cabinet 10 Close the doors of the inverter cabinet A2 SC500HEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance 4 5 Mounting the Panels Check that no animals have entered the base area Attach the plexiglass cover Fasten the connection cabinet grounding cable to the panels with screws Torque 70 in lbs 8 Nm Check that the grounding cables are correctly mounted 5 Screw on the panels Maintenance Manual SC500HEUS eng WH IUS 12041 1 A3 5 Contact 5 Contact SMA America
16. ently in cases where there is high sand or dust content in the air see maintenance report Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Maintenance Manual SC5OQOHEUS eng WH IUS 12041 1 23 4 Maintenance SMA America LLC 1 Remove the air baffle from the inverter cabinet To do this grasp under the air baffle and press upward in the middle when removing 2 Clean the air baffle with a brush and vacuum Push the air baffle into the inverter cabinet Here the ventilation grid in the filter frame has to face the back panel M The ventilation grid is flush with the inverter enclosure What if the air baffle does not go all the way in e Grasp the air baffle from underneath and press upward in the middle while pushing it in 4 3 5 Cleaning the Air Duct and Insect Screen 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 is dependent 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 L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 The insect screen is located on the front side of the inverter s roof see 3 1 Design
17. follow all instructions 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 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 in death or serious injury in minor or moderate injury NTeyile NOTICE is used to address practices not related to personal injury A CAUTION CAUTION indicates a hazardous situation which if not avoided could result A SC5O0OHEUS eng WH IUS1204A1 1 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 symbol is also used in this manual Symbole Indicates information that is important for a specific topic or objective but is not safety relevant a Indicates a requirement for meeting a specific goal Desired result A problem that could occur Markings on this product The following symbols are used as product markings with the following meanings Symbol Warning regarding dangerous voltage
18. is smooth Open and shut the doors several times in the process If the doors do not latch easily apply lubricant to all moving parts of the latch 2 Check whether the doors stay closed If the doors do not stay closed apply lubricant to the door stops 3 Check whether the door hinges move easily If the door hinges do not move easily apply lubricant Lubricate all moving latch elements and movement points 5 If the inverter is located in a region where temperatures fall below freezing protect the profile cylinder of the door lock and the key switch from icing over with non greasy antifreeze Maintenance Manual SCSOOHEUS eng WH IUS 12041 1 35 4 Maintenance SMA America LLC 4 3 14 Checking the Surface of the Switch Cabinet Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 e Check whether the surfaces are damaged If the surfaces are damaged perform repairs immediately within 3 weeks at the latest If surfaces are corroded perform repairs immediately within 3 weeks at the latest 4 3 15 Checking the Switch Cabinet for Corrosion Requirement C The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Required Material L1 For small scale repairs use a touch up stick brush spray paint or 2K PUR acrylic paint in the corresponding RAL color Note the paint manufacturer s instructions LC For repairs of extensive damage use repair paint or 2
19. m the inverter The error messages may give you clues about possible damaged component parts The source of the error must be corrected before scheduled maintenance is started 1 Read error messages via the display see Sunny Central user manual 2 Fix the source of the error see the Sunny Central user manual VI There are no more error messages 4 2 3 Performing Visual Inspection A thorough visual inspection must be performed before any maintenance work This ensures that Sunny Central component parts are not damaged and also minimizes potentially hazardous situations Immediately remedy any deficiencies discovered Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 e Fix any deficiencies discovered during the visual inspection il Visual inspection means e Check the inverter for soiling e Check the inverter s enclosure for damage e Check component parts inside the inverter for damage and discoloration e Check the inverter for loose component parts e Check metal components for visible oxidation e Check component parts for soot from overheating 18 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 4 Maintenance Fix any deficiencies discovered A DANGER Electric shock from live voltage High voltages are present in the inverter and its component parts Failure to heed this safety message can result in severe or lethal injuries due to electric
20. miniature circuit breaker Designation Miniature circuit breaker for the external control voltage Miniature circuitbreaker for the internal control voltage Miniature circuit breaker for the voltage meter Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 37 4 Maintenance SMA America LLC Open the doors of the connection cabinet 2 If external control voltage is used switch on the miniature circuit breaker for the external control voltage 3 Switch on the miniature circuit breaker for the internal control voltage 4 Switch on the miniature circuit breaker for the voltage meter 4 4 2 Checking the AC Circuit Breaker Additional required test material not included in the scope of delivery O Communication Unit BTO30 il Communication Unit BTO30 Maintenance of the AC circuit breaker must be performed with the external Communication Unit BTO30 Die Communication Unit can be connected to the AC circuit breaker during maintenance If Communication Unit BTO30 is not on hand it can be ordered from SMA under item number 60 1620 e Check the AC circuit breaker as described in the separate maintenance manual 4 4 3 Checking Heating Elements Fans and Hygrostat Risk of burns due to the heating element s hot surfaces During the functional test the heating element becomes hot There is a risk of burns if you touch the heating element without protective gloves e Do not touch heating elements with bare hands e Wear pers
21. n of the miniature circuit breaker Designation Miniature circuit breaker for the external control voltage Miniature circuitbreaker for the internal control voltage Miniature circuit breaker for the voltage meter 1 Set the key switch of the inverter to Stop 2 Check whether the DC and AC contactors audibly shut off within 5 seconds or less If the DC and AC contactors do not audibly shut off within 5 seconds or less contact the SMA Service Line 3 Disconnect the inverter from the DC side of the PV array via the external DC disconnecting device and ensure that it cannot be reconnected 4 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 5 Disconnect the inverter on the AC side from the power distribution grid via the external AC disconnecting device and ensure that it cannot be reconnected 20 SCS5OOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance 10 11 12 13 14 13 16 If there is no AC disconnecting device available disconnect the AC voltage from the medium voltage transformer with the medium voltage switch and ensure that it cannot be switched on again Switch off the AC switch disconnector Check whether the inverter s display shows O V DC voltage If the inverter s display does not show O V DC voltage con
22. ning e Only apply the prescribed torque to tighten screw connections with the cage clamp option Torque specifications are shown in the inverter installation manual Contact the SMA Service Line if specifications are missing 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 Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 32 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance Figure 9 Position of screw connections with cage clamp option Position Designation 77V For negative grounding DC For positive grounding DC For positive grounding DC For negative grounding DC A oO Protective conductor 1 Disassemble the protective covers Maintenance Manual SC500HEUS eng WH IUS 12041 1 33 4 Maintenance SMA America LLC 2 Tighten the screw connections with cage clamps using a torque wrench Torque 500 in lbs 56 5 Nm 3 Check insulation and connections for discoloration or changes 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 co
23. ns or otherwise prescribed must be added accordingly 2 4 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 Maintenance Manual SC500HEUS eng WH IUS 12041 1 11 2 Safety SMA America LLC Electrical Hazards A DANGER Electric shock from live voltage High voltages are present in the inverter and its component parts Some maintenance work must be done with voltage present Failure to adhere to the safety messages may lead to severe or lethal injuries due to electric shock Wear class 2 personal protective equipment Always perform work in compliance with the regulations specified in 29 CFR Chapter XVII Part 1910 OSHA NEC and NFPA 7OE Do not touch any live component parts of the inverter or the medium voltage grid Follow instructions precisely Observe safety messages Before performing any work on the inverter always disconnect the inverter if voltage does not absolutely need to be present After disconnecting the inverter wait at least 10 minutes until the inverter s capacitors have discharged completely e Before performing work on the inverter ensure that no voltage is present Electric shock caused by ground fault In a ground fault plant sections that are supposedly gr
24. ntact elements are corroded contact the SMA Service Line 5 Mount the protective covers 4 3 12 Checking the Seals on Doors 3 Clem A Figure 10 Seals on doors 34 SCS5OOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance Position Designation 77 Be Surfaces under pressure Requirement C The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Required maintenance material not included in the scope of delivery O A suitable water free heat resistant lubricant e g WD4O 1 Check whether seals in the area of surfaces under pressure show any damage Tip the area of surfaces under pressure cannot be distinguished when the door is closed If seals are damaged contact the SMA Service Line Maintain seals with talcum Vaseline or wax This prevents frost damage If the side panels were removed check whether seals on the side panels show damage in the area of surfaces under pressure If seals are damaged contact the SMA Service Line 4 3 13 Checking Locking Devices Door Stops and Hinges Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Required maintenance material not included in the scope of delivery O A suitable water free heat resistant lubricant e g WD4O O Non greasy antifreeze e g PS88 1 Check whether the latching action
25. of the Inverter page 15 24 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC A Maintenance Undo the screws on the right hand insect screen 2 Pull the bottom of the right hand insect screen forward This removes the insect screen 3 Undo the screws on the left hand insect screen Maintenance Manual SC500HEUS eng WH IUS 12041 1 25 A Maintenance A Pull the bottom of the left hand insect screen forward This removes the insect screen 5 Clean the air duct from the outside 6 Clean the insect screen with a brush Vacuum the insect screen 8 Check the insect screen for visible damage VI The insect screens are not damaged What if the insect screens are damaged e Replace damaged insect screens 9 Insert the righthand insect screen 26 SC5OOHEUS eng WH IUS 12041 1 SMA America LLC Maintenance Manual SMA America LLC 4 Maintenance 10 Screw the right hand insect screen into place Torque 177 in lbs 20 Nm 11 Insert the left hand insect screen 12 Screw the left hand insect screen into place Torque 177 in lbs 20 Nm Maintenance Manual SC500HEUS eng WH IUS 12041 1 27 4 Maintenance SMA America LLC 4 3 6 Cleaning the Inside of the Switch Cabinet Requirement C The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 1 Remove dirt and
26. onal protective equipment e Always check the function of heating elements from an adequately safe distance il Low air humidity If the air humidity is below 50 you will not be able to perform the function test as the minimum value of the hygrostat is 50 38 SCSOOHEUS eng WH IUS 12041 1 Maintenance Manual SMA America LLC 4 Maintenance gt ow Figure 12 Location of the heating element hygrostat and fan Designation Requirement QO Control voltage is present Q There are no problems 1 Switch the Sunny Central to Stop Open the doors of the connection cabinet Disassemble the heating element s protective cover Adiust the hygrostat in the connection cabinet to the minimum value so that the heating element switches on Tip the hygrostat is adjusted correctly if the relay clicks audibly 5 Check whether the heating element begins to radiate heat after approximately 5 minutes If the heating element is not switched on contact the SMA Service Line Maintenance Manual SC500HEUS eng WH IUS 12041 1 39 4 Maintenance SMA America LLC 6 Check whether the fans are starting to run The fans rotate at low speeds If the fans do not start running contact the SMA Service Line 7 Turn the hygrostat in the connection cabinet back to 8
27. ounded 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 e Wear personal protective equipment Electric shock due to damaged inverter Operating a damaged inverter can lead to hazardous situations that may result in serious or lethal injuries due to electric shock Operate the inverter only if it is in safe and technically faultless working order 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 12 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 2 Safety NOTICE Damage to electronic component parts due to electrostatic discharge Electrostatic discharge can damage or destroy electronic component parts Observe the ESD safety regulations when working on the unit Wear personal protective equipment Discharge the electrostatic charge before touching electronic component parts for example by touching the door s PE connection 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 e Do not place any objects in the escape route
28. 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 4 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 4 3 9 Checking the Surge Arresters Optional Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 J 1 Figure 7 Surge arrester Position Designation 77V Ready indicator Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 29 4 Maintenance SMA America LLC Check whether the surge arrester s ready indicator is red If the surge arrester s ready indicator is red replace the surge arrester Remove the cable Mark the cable in the process It must be connected to the same terminal again later Depress the lever and lift the surge arrester upward out of the top hat rail Insert the new surge arrester into the top hat rail from above and press it against the top hat rail Connect the cable to the terminal from which you removed it before 30 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 4 Maintenance 4 3 10 Checking
29. res 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 completely serviced at the following intervals Maintenance under normal ambient and operating conditions Retighten the power cable connection by using a Every 12 months cage clamp Unscheduled maintenance After any short circuit e Contact the SMA Service Line Preventative replacement intervals GFDI soft grounding ABB high performance After 100 trippings circuit breaker e Contact the SMA Service Line 10 years e Contact the SMA Service Line Surge arrester If tripped e DEHNguard e Contact the SMA Service Line 16 SCS5OOHEUS eng WH IUS 1204 1 1 Maintenance Manual SMA America LLC 4 Maintenance 4 2 Preparing for Maintenance This section contains the tasks that you always have to do before starting maintenance work 4 2 1 Identifying the Inverter The type label provides a clear identification of the Sunny Central Two type labels are attached to the Sunny Central The type labels can be found on both the top left side in the connection cabinet and on the right side in the inverter c
30. safety rules that must always be observed when working on and with the Sunny Central Read this section in order to prevent personal injury and property damage and to ensure long lasting operation of the Sunny Central 2 1 Intended Use The Sunny Central is an inverter that converts direct current generated in the PV modules into alternating current when the DC input voltage is in the 330 V to 600 V range and when the permissible ambient conditions are adhered to The alternating current that is generated is fed into the power distribution grid by a transformer that is connected in series 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 meeting all of the qualification standards for the target audience 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 with 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 The Sunny Central may not be rebuilt or modified and additional component parts may not be installed without the express consent of SMA America LLC The Sunny Central may not be operated with its doors open The Sunny Centr
31. shall not be 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 SCSOOHEUS eng WH IUS 12041 1 3 Important Safety Instructions SMA America LLC IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for the following products e Sunny Central 500HE US CA This manual must be followed during installation and maintenance The product is designed and tested according to 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
32. shock e Disconnect the inverter before remedying the deficiencies discovered during the visual inspection After disconnecting the inverter wait at least 10 minutes until the inverter s capacitors have discharged completely Wear personal protective equipment Ensure that no voltage is present Follow instructions precisely Observe safety messages 4 3 Maintenance under Dead Conditions This section describes maintenance of the Sunny Central with no voltage present All actions described below may only be performed with the inverter disconnected 4 3 1 Disconnecting the Inverter DANGER Electric shock from live voltage The component parts of the Sunny Central are energized Touching component parts of the Sunny Central can result in severe injuries or death e Before performing any work on the Sunny Central disconnect the inverter and secure it against being switched back on After disconnecting the inverter wait at least 10 minutes until the inverter s capacitors have discharged completely Ensure that no voltage is present il Person authorized to operate the medium voltage transformer Only a duly authorized person trained in electrical safety can disconnect and connect the AC voltage of the medium voltage transformer Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 19 4 Maintenance SMA America LLC Figure 4 Positio
33. tact the SMA Service Line Check whether the inverter s display shows O V AC voltage If the inverter s display does not show O V AC voltage contact the SMA Service Line In the case of additional external voltages Disconnect additional external voltages and secure them against being switched back on A DANGER Electric shock from live voltage The component parts of the Sunny Central are energized Touching component parts of the Sunny Central can result in severe injuries or death e After disconnecting the inverter wait at least 10 minutes until the inverter s capacitors have discharged completely If external control voltage is used switch off the miniature circuit breaker for the external control voltage and secure it against being switched back on 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 Cover or shield any adjacent live components The Sunny Central is disconnected Maintenance Manual SC500HEUS eng WH IUS 12041 1 21 4 Maintenance SMA America LLC 4 3 2 Checking Safety Messages Ses E o
34. the Connection of the Power Cables Using Terminal Lugs Optional NOTICE Damage to screw connections from over tightening e Only tighten loose screw connections with the prescribed torque Torque specifications are shown in the installation manual of the inverter Contact the SMA Service Line if specifications are missing Requirement L The inverter must be disconnected see 4 3 1 Disconnecting the Inverter page 19 Figure 8 Position of the power cables in the terminal lug option Position Designation A For negative grounding DC For positive grounding DC For positive grounding DC For negative grounding DC Maintenance Manual SCS5OOHEUS eng WH IUS 12041 1 3 4 Maintenance SMA America LLC Position Designation 7 a 77 E eo Protective conductor 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 or changes 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 3 11 Retightening the Connection of the Power Cables Using Cage Clamps Optional NOTICE Damage to screw connections from over tighte
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