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SUNNY CENTRAL and Accessories

1. 3 5 Cleaning the insect guard Cleaning the insect guards at the air inlets and outlets This section describes how to clean the insect guards at the air inlets and outlets Exchanging the protective grids e 1 Exchanging the protective grids is only necessary in case of damage DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free Depending on the switch cabinet type and model the insect guards must be cleaned in the roof and plinth area in the doors of the inverter cabinets and back sides of the doors The air for cooling the power units is drawn through and blown out through these insect guards The guards can be cleaned using a paintbrush or handheld brush or by vacuuming or applying pressurized air Cleaning fine guards using pressurized air is prohibited They are designed thinner and are used for finger protection Such protective grids are installed on the rear of the switch cabinets 14 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central E Position of the protective grids 1 The following examples illustrate the exact position and size of the individual protective grids L 3 5 1 Sunny Central 100 outdoor older model The switch cabinet of the SC 100 is equipped
2. Maintenance Manual SCWAR WENO94020 21 Maintaining the Sunny Central SMA Solar Technology AG 3 8 Sunny Central 350 SC 350HE The switch cabinet of the SC 350 has two protective grids A each in the front and on the back of the inverter cabinet ED CD a liy a N 22 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 9 Sunny Central 500HE 560HE 00 11 500HE 11 630HE 11 Depending on the model the switch cabinet of the SC 500HE has three protective grids A or one protective grid A of another type in the front of the inverter cabinet The SC 500 model with three protective grids in the front also has three protective grids at the real panel The switch cabinet of the SC 560HE is delivered with only one protective grid A The switch cabinets of the series 11 have the same protective grids as the Sunny Central 560HE P The devices mostly require no maintenance work Due to the airflow of the power units positioned above one another dirt of the bottom power unit may remain in the switch cabinet Vacuum the chamber behind the bottom power unit for cleaning through the ventilation shaft Maintenance
3. 51 Additional notes for Sunny Central 100 52 Checking the transformer and sinusoidal filter 52 Checking the cable feed of the SC 100 53 Additional notes for MV stations 54 Checking the cable feed of the concrete substations 54 Maintaining the Sunny String Monitor 55 Maintaining the Sunny String Monitor Cabinet 58 Maintaining the Sunny String Monitor SSM24 11 61 Maintaining the Sunny Main 65 Contact 5d oet d ud HORREA S aon D REOR UAR 66 Maintenance Manual SCWAR WENO94020 5 Notes on this Manual SMA Solar Technology AG 1 Notes on this Manual 1 1 Scope of Validity This document describes how to maintain the Sunny Central indoor and outdoor central inverters It is valid for all switch cabinet versions the MV stations as well as their accessories such as Sunny String Monitor Sunny String Monitor Cabinet and Sunny Main Box 1 2 Target Group This document is for installers and operators of a Sunny Central It includes a description of the maintenance of the Sunny Central the intervals and the maintenance work The appropriate maintenance protocol describes the replacement intervals of the components that need to be replaced 1 3 Documentation The documents listed below are included in the scope of delivery for your Sunny Central The following information is
4. 37 Checking of lockings and hinges 37 Maintaining the inside of the switch cabinet 38 Checking the inside of the switch cabinet for contamination 38 Cleaning the power unit of the heat sink 39 Cleaning the EVR 40 Checking the power cable connections Al Checking the safety notices 41 Checking the 42 Checking the heating and the 43 Checking protective devices 45 Checking the residual current circuit breaker in the SC 100 45 Checking the circuit 46 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Table of Contents 6 3 6 3 1 6 4 6 5 6 5 1 6 5 2 6 6 6 6 1 6 7 7 7 1 7 2 8 8 1 9 10 11 12 13 Checking the DC main switch ec ao a ote dog 47 Circuit breaker and 47 Checking the fuses and disconnectors 48 Checking the overvoltage arrester 49 Checking the Dehn Guard 49 Checking 1he Blitzductof 2 LEER rv dentine ed tees 50 Maintaining the 50 Replacing the irte hoes ES 51 Maintaining the soft
5. The service socket is switched off Negative glow lamp at power outlet switches off Reconnect the residual current breaker Release door contact switches remove the adhesive tape 7 Close the cabinet doors Maintenance Manual SCWAR WENO94020 45 Checking protective devices SMA Solar Technology AG 6 2 Checking the circuit breaker The circuit breaker is connected with the door via an extension spindle The door itself has no contacts since it cannot be opened when the switch is activated DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions 1 To open the door of the Sunny Central when the cabinet is switched on remove the handle from the extension spindle that connects the switch to the handle The door can then be opened 2 Switch the Sunny Central to Stop and open the doors 3 Ensure that the Sunny Central is connected to a control voltage supply voltage and is supplied with power Tape door contact switch to the On position Switch the Sunny Central to Start 6 Check the residual current breaker by pressing the function test button A The switch trips uu 7 Switch the Sunny Central to Stop 8 Release door contact switches remove the adhesive tape A 9 Close the cabinet doors 46 SCWAR WENO94020 Maintenance Manual SMA Sol
6. Only work on the device when it is switched off and voltage free Seals are at the doors of the switch cabinets as well as at the Sunny Centrals which consist of two switch cabinet units at the connecting point between the two units 1 Visually check the switch cabinet s seals for cracks or other damages Seals in the sealing area must be completely replaced when damaged Incase the seals are damaged outside this area a sufficient sealing effect is usually still available 2 In order to prevent damage due to freezing of the seals caused by the weather use talcum vaseline or wax 4 4 Checking of lockings and hinges DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free 1 Check the correct operation of the inverter cabinet lockings and the concrete substations by opening and closing the doors A locking which cannot be moved smoothly indicates corrosion and thus leakage Check which part of the locking is damaged and take corrective measures Make sure that the door s hinges move easily Check the function of the door stay Replace defective door stays ROO ON Spray all moveable locking elements and movement points with a suitable lubricant which is free of water Maintenance Manual SCWAR WENO94020 37 Maintaining the inside of the switch cabinet SMA Solar Technology AG
7. 5 Maintaining the inside of the switch cabinet 5 1 Checking the inside of the switch cabinet for contamination DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free l Checkthe inside of the switch cabinet for heavy dust deposits dirt moisture and water penetration from outside 2 If necessary clean the Sunny Central and employ suitable corrective measures 38 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the inside of the switch cabinet 5 2 Cleaning the power unit of the heat sink i Maintenance work of the power unit of the heat sink The power unit of the heat sink requires almost no maintenance work an optical check is sufficient DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free As a rule cleaning the power unit of the heat sink is only required in case of an inverter failure The dirt is usually absorbed by the protective grids These grids are designed in such way that the hole diameter is as large as the openings of the heat sink The figure below shows the heat sink A of a Sunny Central 250 lt A di If the heat sink is contaminated it can be cleaned using compressed ai
8. Central Inverter SUNNY CENTRAL and Accessories Maintenance Manual SCWAR WENO94020 98 4005820 Version 2 0 CN SMA Solar Technology AG Table of Contents Table of Contents 1 1 1 1 2 1 3 1 4 1 5 2 2 1 2 1 1 2 1 2 2 1 3 3 1 3 2 3 3 3 4 3 4 1 3 4 2 3 4 3 3 4 4 3 4 5 3 5 3 5 1 3 5 2 3 5 3 3 5 4 3 5 5 Notes on this 6 Gd SURE DOR RR 6 Target Groupe sooo eM ee Ue ee cuoc 6 Documentation 6 SD e par Saa oS SAO LAN 6 Symbols Usdin bt tes a d wee ate Rai dus 7 duca hoe each owas dung Sobre 8 Safety 1 5 8 Electrical safety x eec eR uU Up eR O eta ei de 8 Personnel x eet dere E E CES Re E E S E EE 8 s s oon ar esca E TCR Et oie PALA te Rue 8 Maintaining the Sunny 9 Identifying the Sunny Central 9 Reading out Long term Data and Error Memory 10 Cleaning the Power Electronics 10 Maintaining the air inlet filter 11 GeneralvActivities 14 ru ed ro ete ase ede S 11 Sunny Central 100LV SC 150 SC 125LV SC 200 200HE 12 Sunny Central 250 250HE 0 eee eee 13 S nny Central 350 S5C 350HE etri e SURE 13 Sunny Central 5OOHE 560HE 400HE 11 500HE 11
9. Sunny Central s door In addition the seris number A is located on the front side of the device u 8 Maintenance Manual SCWAR WENO94020 9 Maintaining the Sunny Central SMA Solar Technology AG 3 2 Reading out Long term Data and Error Memory In order to ensure smooth plant operation all plant components must be optimally matched to one another Deviations from the optimum operation can result in yield losses and thus in a reduction of the plant s profitability Even though there are depending on the plant communication several features which issue a warning to the plant operator in case of string failure or malfunctions of the inverter a regular check of the plant operation is necessary to recognize possible failures which have no alarm function Furthermore plant operation might be improved by analyzing the plant data Depending on the plant size the error memory of the central inverter as well as the long term data of the data logger must be analyzed at least once a month Proceed as described in the user manual 3 3 Cleaning the Power Electronics DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free The power electronics of the Sunny Central inverters is considerably well protected and thus requires almost no maintenance work Only carry out a visual i
10. Procedure for checking the heating DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions Switch the Sunny Central to Stop and open the doors Ensure that the Sunny Central is connected to a control voltage supply voltage Tape door contact switch to the On position gt Turn the hygrostat down as far down as possible If the value is smaller than the current air humidity the heater is activated mie Air humidity is too low If the air humidity is too low a functional test of the heater can not be carried out In this case the hygrostat does not switch on even if it is set to the minimum value CAUTION N Danger of burn injury due to hot heating parts Do not touch parts other than those described in the instructions IF the hygrostat has been switched through the heating fans must start and the air blown through the heat sink must heat up 5 the functional test of the heating has been conducted adjust the hygrostat back to the initial setting The value is specified with an adhesive label on the thumb wheel and in the circuit diagram 6 Release door contact switches remove the adhesive tape 7 Close the cabinet doors 44 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Checking protective devices 6 Checking
11. Technology AG shall apply The content of these documents is continually checked and amended where necessary However discrepancies cannot be excluded No guarantee is made for the completeness of these documents The latest version is available online at www SMA de or from the usual sales channels Guarantee or liability claims for damages of any kind are excluded if they are caused by one or more of the following Damages during transportation Improper or inappropriate use of the product Operating the product in an unintended environment Operating the product whilst ignoring relevant statutory safety regulations in the deployment location Ignoring safety warnings and instructions contained in all documents relevant to the product Operating the product under incorrect safety or protection conditions Altering the product or supplied software without authority The product malfunctions due to operating attached or neighboring devices beyond statutory limit values n case of unforeseen calamity or force majeure The use of supplied software produced by SMA Solar Technology AG is subject to the following conditions SMA Solar Technology AG rejects any liability for direct or indirect damages arising from the use of software developed by SMA Solar Technology AG This also applies to the provision or non provision of support activities Supplied software not developed by SMA Solar Technology AG is subject to the respect
12. protective devices Depending on the switch cabinet model and production version the central inverters have several circuit breakers which need to be regularly checked for correct function You can locate the exact position and the number of circuit breakers using the reference designation of the components in the provided circuit diagram Depending on the switch cabinet model the following circuit breakers are available Residual current circuit breaker e Line circuit breaker e Power switch e Motor overload switch 6 1 Checking the residual current circuit breaker in the SC 100 The control voltage supply voltage is fed to the outside in some Sunny Central inverters in order to feed external devices such as COM B To protect these devices these Sunny Central inverters have residual current breaker The residual current breaker has a function test button When pressing this button the failure can be simulated DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Do not touch parts other than those described in the instructions 1 Switch the Sunny Central to Stop and open the doors 2 Ensure that the Sunny Central is connected to a control voltage supply voltage and is supplied with power A 3 Tape door contact switch to the On position NA 4 Check the residual current breaker by pressing the function test button A The switch trips
13. with a protective grid in the plinth area The cooling air is drawn through the filter in the plinth and blown out through the guard plate on the back panel of the inverter MS EXE Front view Ventilation Rear view Maintenance Manual SCWAR WENO94020 15 Maintaining the Sunny Central SMA Solar Technology AG 3 5 2 Sunny Central 100 indoor outdoor new model Both cabinets have large meshed protective grids A in the roof and one in the plinth area View of the SC 100 ventilation The air is drawn sucked in trough the roof In the outdoor version the air is emitted through the plinth in the indoor version through the roof The actual airflow is protected by the plinth panel as well as by the roof and has a further air filter in this case a fine meshed air filter The indoor version has no filter in the exhaust air area it is not included in the delivery In this case also the base is sealed with a plate Cleaning the filter of the supply air requires a prior disassembly of the roof Cleaning the filter of the exhaust air requires a 1 prior disassembly of the plinth panel Protective grid 16 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 5 3 Removing the roof The Sunny Central 100 indoor usually has an air duct through which the exhaust air is emitted to the outside The air duct must b
14. 630HE 11 14 Cleaning the insect 14 Sunny Central 100 outdoor older 15 Sunny Central 100 indoor outdoor new 16 Removing hetook iis eR ACRES ee eee ea 17 Removing the plinth 5 19 Removing the exhaust air filter in the 19 Maintenance Manual SCWAR WENO94020 3 Table of Contents SMA Solar Technology AG 3 6 3 7 3 8 3 9 3 10 3 11 3 11 1 3 11 2 4 4 2 4 3 4 4 5 1 5 2 5 3 5 4 5 5 5 6 5 7 6 1 6 2 Sunny Central 1OOLV SC 125LV SC 150 SC 200 2DOPIE cane E datas ace A aia 20 Sunny Central 250 250 21 Sunny Central 350 SC 35 22 Sunny Central 500HE 560HE 400HE 11 500HE 11 Ae PER leds 23 Sunny Central 400 500 700 1000 1120MV 25 Maintaining the heat 27 Disassembling the heat exchanger for Sunny Central 200 7 250 serier 27 Disassembling the heat exchanger of Sunny Central AOOHE 11 500HE 11 6 3 11 31 Covers and 35 Checking the emergency stop 35 Checking the door contact switch 36 Checking the seals
15. 8 Check all power cable connections for looseness and tighten them if necessary Check the insulation and the busbar for discoloration or degradation Replace any damaged connectors or corroded contacts 9 Check the filter of the ventilation grids for dirt and clean or replace it if necessary Maintenance Manual SCWAR WENO94020 65 Contact SMA Solar Technology AG 13 Contact If you have technical problems concerning our products contact the SMA Serviceline We require the following information in order to provide you with the necessary assistance e Inverter type Type and number of modules connected Communication type e Sunny Central serial number Failure or warning number of the Sunny Central e Display of the Sunny Central SMA Solar Technology AG Sonnenallee 1 34266 Nliestetal Germany www SMA de SMA Serviceline Tel 49 561 9522 299 Fax 49 561 9522 3299 E Mail SunnyCentral Service SMA de 66 SCWAR WENO094020 Maintenance Manual SMA Solar Technology AG Legal Restrictions The information contained in this document is the property of SMA Solar Technology AG Publishing its content either partially or in full requires the written permission of SMA Solar Technology AG Any internal company copying of the document for the purposes of evaluating the product or its correct implementation is allowed and does not require permission Exclusion of liability The general terms and conditions of delivery of SMA Solar
16. Blitzductor 1 Visual inspection of the arrestor for optical signs of wear 2 A visual inspection is not possible for this arrestor Determine whether the inverter is ready for operation by means of a measuring device Measurements An exact statement about the state of the arrester can only be made with an appropriate test device The DEHNrecorder LC M3 from Dehn S hne GmbH amp Co KG is the suitable test device for this purpose The measurement procedure is described in the user manual of the device and has to be carried out by an electrically skilled person 6 6 Maintaining the GFDI DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions The GFDI is subject to aging caused by wear of the contacts every time they are tripped Due to aging sensitivity is reduced Check the insulation of the PV generator in regular maintenance intervals in order to ensure the functionality of the GFDI 1 Visual inspection of the GFDI Remove possible dirt or dust deposits by using a vacuum cleaner or with compressed air Functional test of the GFDI Switching the GFDI in deactivated status of the inverter for mechanically checking the function and for checking the signaling 2 Switch off F71 Failure 201 appears in Sunny Central Control 3 Switch on F71 M Failure 201 is confirmed Insulatio
17. Cabinet fs 3 Check whether there is condensation water in the device Wipe out the Sunny String Monitor Cabinet check from where the water intruded the device and take corrective measures 4 Check the mounting of the Plexiglass covers above the string fuses for damage and ensure that it is securely mounted 5 Check the safety notices and in the device and replace them if they are damaged or no longer legible You can order new labels from SMA Solar Technology AG 6 Visually check the existing fuses and fuse holders In addition check the auxiliary voltage of 55 V at the connection terminals and the plug connectors it must be at least 30 V 8 Check the entries of the connection cables for dirt damage and sealing Maintenance Manual SCWAR WENO94020 59 Maintaining the Sunny String Monitor Cabinet SMA Solar Technology AG 13 14 15 60 Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts Check all string cable connections for looseness and tighten them if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation Check all cable conn
18. Manual SCWAR WENO94020 23 Maintaining the Sunny Central SMA Solar Technology AG Depending on the model the switch cabinet of the SC 500HE has three protective grids A or one individual long ventilation shaft B on the back side The switch cabinet of the Sunny Central 560HE and of the series 11 are only equipped with the individual ventilation shaft without grids Or gt T EN i 24 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 10 Sunny Central 400 500 700 1000 1120MV The central inverters of this series consist each of two Sunny Central of the HE series with a common connection to a medium voltage transformer How to clean the inverter inside the stations is described under the above mentioned points The stations are equipped with several doors and windows A which serve as inverter ventilation The doors and windows have protective grids and must also be cleaned Maintenance Manual SCWAR WENO94020 25 Maintaining the Sunny Central SMA Solar Technology AG sunny Os aem Size of doors and windows Depending on the size of the station the form and size of the openings may vary This depends on the inverters used in the station 26 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 11 Mai
19. aintenance of the Sunny String Monitor is completed Maintenance Manual SCWAR WENO94020 57 Maintaining the Sunny String Monitor Cabinet SMA Solar Technology AG 10 Maintaining the Sunny String Monitor Cabinet The String Monitors are usually installed near the modules in the open air The larger the plant the more String Monitors are required This must be taken into account for maintenance work In the following some steps are listed which serve as maintenance instruction DANGER Death resulting from burning and electric shock upon touching the live components Only work on the device when it is switched off and voltage free l First check the installation site for accessibility inflammable materials and safe positioning and then make sure that the Sunny String Monitor Cabinet is attached to a horizontal installation and that a sufficient sun shading system is available for example by an installation in the PV field hii 2 Check the enclosure for damage and make sure that the switch cabinet doors as well as the door mechanism are securely positioned and properly sealed Maintenance in Sunny String Monitor Cabinet 1 All other steps of maintenance work are carried out inside the Sunny String Monitor Cabinet or affect the cabling leading inside 58 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny String Monitor
20. ar Technology AG Checking protective devices 6 3 Checking the DC main switch Depending on the model and power class different motor driven circuit breakers in the Sunny Central inverters are used on the DC side 6 3 1 Circuit breaker and switch disconnector Motor driven DC circuit breaker spring power storage device This switch is equipped with a circuit breaker A a spring power storage device B an off key C and a position display D It is used in the following Sunny Central devices Sunny Central 100LV n Sunny Central 125LV B ER Sunny Central 150 Cp Sunny Central 200 200HE e Sunny Central 250 250HE C Sunny Central 350 350HE a Sunny Central 500HE sm Sunny Central 560HE This switch is equipped with a circuit breaker A a spring B D power storage device B an off key C and a position display D It is used in the following Sunny Central devices Sunny Central 400HE 11 Sunny Central 500HE 11 Sunny Central 630HE 11 Maintenance Manual SCWAR WENO94020 47 Checking protective devices SMA Solar Technology AG Motor driven DC circuit breaker direct drive This switch has a switch on device A a position display B an off key C and a slider D for setting the automatic manual operation It is used in the following Sunny Central devices SC100 indoor C SC100 outdoor im 07059 7 Procedure for checki
21. are valuable for the optimal installation and operation of your product Maintenance Manual SCWAR WENO94020 7 Safety SMA Solar Technology AG 2 Safety 2 1 Safety Instructions 2 1 1 Electrical safety High voltages are present in the device All work on the Sunny Central must be carried out exactly as described in the maintenance manual and all safety precautions must be observed Follow all safety precautions of the Sunny Central s installation guide Do not touch the live components of the Sunny Central or the medium voltage grid Observe all safety regulations regarding the medium voltage grid Damage to the Sunny Central e g defective cables or damaged enclosure can lead to death by electric shock or fire The Sunny Central may only be used when it is technically faultless and safe to operate Operate the Sunny Central only if there are no visible damages Regularly check the Sunny Central for visible damage Ensure that all external safety features are accessible at all times and that they are regularly tested for correct functionality Electrostatic discharge can damage the Sunny Central When working on the Sunny Central and handling components observe all ESD safety regulations Discharge electrostatic charge by touching the grounded Sunny Central enclosure before handling electronic components 2 1 2 Personnel Only qualified technical personnel may perform work on the MY station Qualified means that the personnel m
22. be at least 30 V Check the entries of the connection cables for dirt damage and sealing 2 Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts Check all string cable connections for looseness and replace defective spring terminals if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation Check all cable connections of the DC main switch for looseness and tighten them if necessary Check the insulation and the switch for discoloration or degradation Check the shield connection of the communication cables The shield connection must only be hand tightened Check the ground connection and the contact resistance to the ground potential Check the overvoltage protector The visual display must be green Maintenance Manual SCWAR WENO94020 63 Maintaining the Sunny String Monitor SSM24 11 SMA Solar Technology AG 15 Check the lateral pressure adjusting screws for dirt Clean or replace them if necessary M Maintenance of the Sunny String Monitor24 is completed 64 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Main Box 12 Maintaining the Sunny Main Box The Sunny Main Box serves for combining the strings outside the Sunny Central switch cabinet The device
23. contained in these documents e installation guide Setup and installation of the Sunny Central e User manual How to operate the Sunny Central and Sunny Central Control e Circuit diagrams Sunny Central circuit diagrams including torques and the equipment list with all article numbers Technical data sheets Technical data pertaining to the Sunny Central Commissioning report Check list for commissioning Maintenance manual Maintenance of the Sunny Central and its accessories Maintenance protocol Check list for maintenance 1 4 Spare parts You can find the article number of the individual spare parts in the equipment list in the circuit diagram You can obtain the article numbers from SMA Solar Technology 6 SCWAR WENO094020 Maintenance Manual SMA Solar Technology AG Notes on this Manual 1 5 Symbols Used The following four types of safety notices and general information are used in this document 1 DANGER DANGER indicates a hazardous situation 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 situation that can result in damage to property if not avoided Information e 1 Information provides tips that
24. e disassembled in order to remove the roof Depending on the product version the Sunny Central 100 is produced with different roofs The following describes how to disassemble the roof of both production versions Disassembling version 1 1 Loosen the screws at the left side in the roof of the Sunny Central 2 Loosen the screws at the right side in the roof of the Sunny Central 3 Lift the roof 1 Remove the Start Stop switch 2 The roof is removed Maintenance Manual SCWAR WENO94020 17 Maintaining the Sunny Central SMA Solar Technology AG Disassembling version 2 1 2 Remove the Start Stop switch Loosen the screws at the front filter in the roof of the Sunny Central Loosen the screws at the back filter of the Sunny Central Pull the front filter forward and remove it Pull the rear filter forward and remove it Put the filters aside Remove the screws A which hold the roof at the Sunny Central The screws are in the place where the front filter was attached before The roof can now be tilted backwards 1 to clean the filter in the roof of the switch cabinet If there is not enough space to tilt the roof backwards remove it To do so loosen the cable gland 2 of the switch Unhook the roof and remove it by pulling it upwards The roof is removed SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 5 4 Removing the plinth pan
25. eck the pressure adjusting screw for dirt or damage and replace it if necessary 6 Check the Plexiglass covers above the string fuses 56 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny String Monitor 14 15 Check the safety notices and in the device and replace them if they are damaged or no longer legible You can order new labels from SMA Solar Technology AG Visually check the existing fuses and tension springs on the fuse holders In addition check the auxiliary voltage of 55 V at the connection terminals and the plug connectors it must be at least 30 V Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts Check all string cable connections for looseness and tighten them if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation Check all cable connections of the optional DC main switch for looseness and tighten them if necessary Check the insulation and the switch for discoloration or degradation Check the shield connection of the communication link It must be hand tightened therefore a screwdriver is not suitable Check the ground connection and the contact resistance to the ground potential Check the overvoltage protector the visual display must be green M
26. ections of the optional DC main switch for looseness and tighten them if necessary Check the insulation and the switch for discoloration or degradation Check the shield connection of the communication cables The shield connection must only be hand tightened Check the ground connection and the contact resistance to the ground potential Check the overvoltage protector The visual display must be green Check the filter pads of the ventilation grids for dirt and clean or replace them if necessary Replacement filter pads can be ordered from SMA Solar Technology AG Maintenance of the Sunny String Monitor Cabinet is completed SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny String Monitor SSM24 11 11 Maintaining the Sunny String Monitor SSM24 11 The String Monitors are usually installed near the modules in the open air The larger the plant the more String Monitors are required This must be taken into account for maintenance work In the following some steps are listed which serve as maintenance instruction DANGER Death resulting from burning and electric shock upon touching the live components e Only work on the device when it is switched off and voltage free CAUTION AN Danger of burn injuries due to hot components Leave the device to cool before starting to work on it l First check the installation site for accessibility inflammable materials and safe position
27. els Depending on the production version the plinth panel of the Sunny Central 100 consists of one unit or two units Identical plinth panels are installed in both production versions 1 Loosen the screws on the edges of the plinth panel 2 Remove the plinth panel by pulling it forward The plinth panel is removed 3 5 5 Removing the exhaust air filter in the base 1 Loosen the thumb nut at the filter in the base of the switch cabinet 2 Remove the filter The filter can now be cleaned Maintenance Manual SCWAR WENO94020 19 Maintaining the Sunny Central SMA Solar Technology AG 3 6 Sunny Central 100LV SC 125LV SC 150 SC 200 200HE The switch cabinets of type SC 100LV SC 150 SC 1251V and SC 200 are mostly identical in construction and equipped one protective grid A in the front The exhaust air can either be discharged to the top or the back The inverter is therefore equipped with a protective grid A in the roof or on the back side Sm 20 SCWAR WEN094020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 7 Sunny Central 250 250HE The switch cabinet of the SC 250 250HE has two protective grids A in the front of the inverter cabinet The exhaust air can either be discharged to the top or the back Consequently this device has either a grid A on the back side or in the roof 9 a
28. exhaust air area in the cabinet s plinth for contamination or damage An optimal ventilation of the inverter must be ensured at all times Maintenance Manual SCWAR WENO94020 53 Additional notes for stations SMA Solar Technology AG 8 Additional notes for MV stations 8 1 Checking the cable feed of the concrete substations DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free 1 Check the chamber and the air ducts of the concrete substations for contamination or damage The cable vault must be dry and dustree No insects or other animals may enter the cable vault Take appropriate measures if necessary 2 Check the ventilation An optimal ventilation of the inverters must be ensured at all times The power grid is supplied via a medium voltage transformer which requires almost no maintenance work Regularly check whether oil has leaked 54 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny String Monitor 9 Maintaining the Sunny String Monitor The String Monitors are usually installed near the modules in the open air Depending on the system size an increased number of String Monitors is required which must be taken into account during maintenance work In the following some steps are listed which serve as maintenance instruction DANGER Death res
29. ing and or mounting and then make sure that the Sunny String Monitor is in a horizontal position and that a sufficient sun shading system is available for example by an installation directly behind the PV generator 2 Check the enclosure for damage and make sure that the switch cabinet doors as well as the door mechanism are securely positioned and properly sealed Maintenance Manual SCWAR WENO94020 61 Maintaining the Sunny String Monitor SSM24 11 SMA Solar Technology AG Maintenance in Sunny String Monitor SSM24 11 e 1 All other steps of maintenance work are carried out inside the Sunny String Monitor or affect the cabling leading inside 62 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny String Monitor SSM24 11 13 14 Check whether there is condensation water in the device If there is condensation water in the bottom plate area clean the two condensation drains A in the plinth of the Sunny String Monitor Check the mounting of all Plexiglass covers for damage and ensure that they are securely mounted Check the safety notices on and in the device and replace them if they are damaged or no longer legible You can order new labels from SMA Solar Technology AG Visually check the existing fuses and fuse holders In addition check the auxiliary voltage of 55 V at the connection terminals and the plug connectors it must
30. itch the Sunny Central to Stop and open the doors 2 Ensure that the Sunny Central is connected to a control voltage supply voltage and is supplied with power 3 sure that the emergency stop on the outside of the device is not activated 4 Tape all door contact switches to the On position M During normal operation both signal lights A of the emergency stop relay must be illuminated 5 If the emergency stop is activated the signal lights of the emergency stop relay must switch to OFF The Sunny Central Control displays error message 206 and the fault must be acknowledged manually 6 Unlock the emergency stop and acknowledge the fault on the Sunny Central Control Release door contact switches remove the adhesive tape 8 Close the cabinet doors Testing the Emergency Stop Circuits In a Team configuration or in plants with several Sunny Central inverters connected in a Team configuration the emergency stop relay must switch in all cabinets Connecting the emergency stop relay Depending on the switch cabinet model and production version the emergency stop relay is installed with the signal lights on the controller 9 Carry out a functional test for every emergency stop Test the switches on the cabinet in the stations and the other external emergency stop switches Maintenance Manual SCWAR WENO94020 35 Covers and lockings SMA Solar Technology AG 4 2 Checking the door contact
31. ive licensing and liability agreements of the manufacturer SMA Factory Warranty The current guarantee conditions come enclosed with your device These are also available online at www SMA de and can be downloaded or are available on paper from the usual sales channels if required Trademarks 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 Solar Technology AG is under license SMA Solar Technology AG Sonnenallee 1 34266 Niestetal Germany Tel 49 561 9522 0 Fax 49 561 9522 100 www SMA de E Mail info SMA de 2004 to 2010 SMA Solar Technology AG All rights reserved Maintenance Manual SCWAR WENO94020 67 SMA Solar Technology AG
32. ltage arrester Depending on the switch cabinet model and production version the central inverters have several overvoltage protectors which need to be regularly checked for correct function You can locate the exact position and number of overvoltage protectors using the reference designation of the components in the provided circuit diagram The overvoltage protectors are inspected visually and by means of measurements DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free 6 5 1 Checking the Dehn Guard 1 Visual inspection of the arrestor for optical signs of wear 2 Check the operating readiness of the arrester via the function and fault signaling A of the protection path which is free of operating current Visual display green Overvoltage protector is ready for operation Visual display red Overvoltage protector defective Measurements An exact statement about the state of the arrester can only be made with an appropriate test device The PM20 from Dehn S hne GmbH amp Co KG is the suitable test device for this purpose The measurement procedure is described in the user manual of the device and has to be carried out by an electrically skilled person Maintenance Manual SCWAR WENO94020 49 Checking protective devices SMA Solar Technology AG 6 5 2 Checking the
33. n test of the PV generator and of the connected Sunny Central e 1 The plant operator determines the insulation test of the entire plant 50 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Checking protective devices 6 6 1 Replacing the GFDI In case the mechanical or optical check is not fulfilled or in accordance with the maintenance protocol f the must be replaced Replacement is also necessary after at least after 100 ground faults which led to the tripping of the GFDI 6 7 Maintaining the soft grounding Maintenance work of the soft grounding is carried out after checking the GFDI Once tripped manually reset the failure via the button Maintenance Manual SCWAR WENO94020 51 Additional notes for Sunny Central 100 SMA Solar Technology AG 7 Additional notes for Sunny Central 100 7 1 Checking the transformer and sinusoidal filter Transformer connections and sinusoidal filter connections e 1 The transformer connections and sinusoidal filter connections require almost maintenance work a visual check is sufficient Depending on the model the switch cabinet of the Sunny Central 100 is initially mounted in two units later in one unit In both models the transformers as well as the sinusoidal filters are mounted separately from the electronics in a separate chamber Both the transformers and the sinusoidal filters and its connections require little maintenance and are very durable Nevertheless
34. nections for looseness and tighten them if necessary e Torque specifications You will find the torques of the individual connections in the Sunny Central circuit diagram If no torque specifications are available contact the Sunny Central Service 2 Check the connectors and insulation for discoloration or degradation 3 If necessary replace any damaged connectors or corroded contacts 5 5 Checking the safety notices DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free Check the safety notices and stickers on and in the switch cabinet and replace missing or damaged labels Maintenance Manual SCWAR WENO94020 41 Maintaining the inside of the switch cabinet SMA Solar Technology AG 5 6 Checking the Fans DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions Depending on the switch cabinet model the following fans are avoilable Cabinet cooling fan Heat sink fan s Interior rotating fan s e Heating fan Check all cooling fans for functionality and operating noise The fans can be switched on by adjusting the thermostats 1 Switch the Sunny Central to Stop and open the doors 2 Ensurethatthe Sunny Central is connected to a control voltage
35. ng the DC circuit breaker 1 Switch the Sunny Central to Stop and open the doors 2 Ensurethatthe Sunny Central is connected to a control voltage supply voltage and is supplied with power 3 Tape door contact switch to the On position 4 Switch the Sunny Central to Start M The DC switch is switched on and shifts to On position 5 Switch the Sunny Central to Stop The DC switch trips and shifts to Off position 6 Release door contact switches remove the adhesive tape Close the cabinet doors 6 4 Checking the fuses and disconnectors DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free 1 Visually check the existing fuses and tension springs on the fuse holders 2 Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts 3 Check all string cable connections for looseness and tighten them if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation 4 lf necessary lubricate the contacts The check of the fuses and disconnectors is completed 48 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Checking protective devices 6 5 Checking the overvo
36. nspection and clean the circuit boards with a soft brush or a vacuum cleaner with a soft top part if there are dust deposits The cleaning equipment must be anti static and ESD compliant Do not use any hard or coarse brushes Using pressurized air is prohibited 10 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 4 Maintaining the air inlet filter 3 4 1 General Activities DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free Cleaning or replacing the filter pads in the air inlet filters This section describes how to disassemble and clean the ventilation grids as well as how to replace the corresponding air filter pads Depending on the switch cabinet type and model ventilation grids which have filter pads must be maintained The filter pads must be cleaned and replaced if the degree of pollution is too high The Sunny Central 100 only has ventilation grids without air filter pads Disassembling and installing the ventilation grids with the appropriate filter pads l Slightly lift the top part of the ventilation grid by using a screwdriver and pull the grid together with the top part forward The frame of the ventilation grids is securely attached to the switch cabinet s door and cannot be removed 2 Remove the filter pads The filter pad is in a cuto
37. ntaining the heat exchanger The Sunny Central with the ventilation option chemically active is equipped with a heat exchanger Clean the fans and ventilation grids of the heat exchanger during maintenance Depending on the Sunny Central type different heat exchangers are installed As an example the disassembling procedure is shown for Sunny Central 250 and Sunny Central 630 3 11 1 Disassembling the heat exchanger for Sunny Central 200 250 DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free 1 Open the doors of the DC inverter cabinet The heat exchangers A are on the inside of the door of the switch cabinets Maintenance Manual SCWAR WENO94020 27 Maintaining the Sunny Central SMA Solar Technology AG 2 Remove the screws of the lid of the heat exchanger Place the screws aside 28 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 Pull the lid slightly forward 4 Remove the grounding of the lid 5 Place the lid aside Maintenance Manual SCWAR WENO94020 29 Maintaining the Sunny Central 7 30 Disconnect the terminal of the power supply of the fans in the heat exchanger Unscrew and disassemble
38. of the power supply of the fans in the heat exchanger 32 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 7 Unscrew and disassemble the cover of the top fan of the heat exchanger L7 8 Unscrew and disassemble the cover of the bottom fan of the heat exchanger 9 Clean ventilation grid between the disassembled fans with a brush a paint brush a cloth or compressed air Maintenance Manual SCWAR WENO94020 33 Maintaining the Sunny Central SMA Solar Technology AG 10 Clean the fan with a soft brush a paint brush or a cloth M The heat exchanger has been cleaned Reassemble all parts of the heat exchanger 34 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Covers and lockings A Covers and lockings 4 1 Checking the emergency stop gt Check the function of the internal and external emergency stop switch Refer to the reference designation and the circuit diagram provided for the exact position of the respective switch DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions 1 Sw
39. r Cleaning with a vacuum cleaner is not permissible as this procedure would only allow the cleaning of a small part of the heat sink Maintenance Manual SCWAR WENO94020 39 Maintaining the inside of the switch cabinet SMA Solar Technology AG 5 3 Cleaning the EVR resistor Maintenance work on the EVR e 1 The EVR requires almost no maintenance work an optical check is sufficient DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free The EVR resistor is an optional accessory located on the roof of the Sunny Central or is installed inside the Sunny Central 1 Check the EVR resistor for heavy dust deposits dirt and moisture 2 If necessary clean the EVR resistor and conduct appropriate corrective measures to prevent further contamination A 40 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the inside of the switch cabinet 5 4 Checking the power cable connections DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Only work on the device when it is switched off and voltage free NOTICE Damage to the clamp connections due to over tightening e Tighten the aluminum terminal connections only when they are loose 1 Check all power cable con
40. s are usually installed outdoors near the modules or in a building Depending on the plant size several devices are required This must be taken into consideration for maintenance work In the following some steps are listed which serve as maintenance instruction DANGER Death resulting from burning and electric shock upon touching the live components Only work on the device when it is switched off and voltage free l First check the installation site for accessibility inflammable materials and safe positioning and then make sure that the Sunny Main Box is mounted horizontally and that the sun shading system is maintained 2 Check the enclosure for damage and make sure that the switch cabinet doors as well as the door mechanism are securely positioned and properly sealed 3 Check the entries of the connection cables for dirt damage and sealing The Sunny Main Box cabling is securely fastened The cabling of the Sunny Main Box is completely foamed in the area of the bottom plate Ensure that the foam is not porous V Check the strain relief of the entire cabling 4 Check whether there is condensation water in the device Check the Plexiglass covers above the string fuses Check the safety notices on and in the device and replace them if they are damaged or no longer legible You can order new labels from SMA Solar Technology AG 7 Visually check the existing fuses and tension springs on the fuse holders
41. supply voltage and is supplied with power 3 Tape all door contact switches to the On position 4 Turn the thermostats down as far down as possible M The fans start running as soon as the value of the set temperature has dropped below the set value 5 the functional test of the fans has been conducted adjust the thermostats back to the initial setting The value is specified with an adhesive label on the thumb wheel and in the circuit diagram 6 Release door contact switches remove the adhesive tape 7 Close the cabinet doors 42 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the inside of the switch cabinet 5 7 Checking the heating and the hygrostat Depending on the switch cabinet model and production version one ore several heating models of the Rittal Stego or Heine company are installed You can locate the exact position number of heaters and the corresponding hygrostats using the reference designation of the components in the provided circuit diagram View of the installed heaters and hygrostats Rittal heating 300 W Stego heating 300 400 W Different types of construction Heaters of the similar construction type of the company Heine are also installed in a few switch cabinets Maintenance Manual SCWAR WENO094020 43 Maintaining the inside of the switch cabinet SMA Solar Technology AG View of hygrostat
42. switch Depending on the switch cabinet model and production version the following door contact switches of the companies Rittal and IBB are installed View of the door contact switches DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components Do not touch parts other than those described in the instructions 1 Switch the Sunny Central to Stop and open the doors Ensure that the Sunny Central is connected to a control voltage supply voltage and is supplied with power 2 Make sure that the emergency stop on the outside of the device is not activated 1 Tape all door contact switches to the On position M During normal operation both signal lights A of the emergency stop relay must be illuminated 2 Switch off and then switch on again one after another all door contact switches by loosening the tape fixing Mi Signal lights at the emergency stop relay turn off as long as it is switched off n Stop mode there is no signal at the Sunny Central Control 3 Release door contact switches remove the adhesive tape Close the cabinet doors New door contact switches can be ordered from SMA if they need to be replaced 36 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Covers and lockings 4 3 Checking the seals DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components
43. tch cabinets of type SC 1001V SC 150 SC 125 IV and SC 200 are mostly identical in construction and equipped with four large air inlet filters A 12 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 4 3 Sunny Central 250 250HE The switch cabinet of the SC 250 is equipped with six large A air inlet filters The switch cabinets of the new series have four further air inlet filters in the AC cabinet LL ams mms lt es NOR m L BH HB VY HM 3 4 4 Sunny Central 350 SC 350HE The switch cabinet of the SC 350 is equipped with eight large A air inlet filters Maintenance Manual SCWAR WENO94020 13 Maintaining the Sunny Central SMA Solar Technology AG 3 4 5 Sunny Central 500HE 560HE 400HE 11 500HE 11 630HE 1 1 Depending on the design the switch cabinet of the SC 500HE is equipped with two small air inlet filters A and six large air inlet filters B or only eight large air inlet filters B Only in this model the switch cabinet of the SC 560HE is equipped with eight large air inlet filters ERG paa See SS
44. the top fan of the heat exchanger Place the fan aside Unscrew and disassemble the bottom fan of the heat exchanger Place the fan aside Clean the heat sink between the disassembled fans with a brush a paint brush a cloth or compressed air Clean the ventilation grids as described in 3 4 1 General Activities page 11 Clean the fan with a soft brush a paint brush or a cloth The heat exchanger has been cleaned Reassemble all parts of the heat exchanger SCWAR WENO94020 SMA Solar Technology AG Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 11 2 Disassembling the heat exchanger of Sunny Central 400HE 11 500HE 11 630HE 1 1 DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free 1 Open the door of the DC cabinet The heat exchanger is on the inside of the door 2 Remove the screws of the lid of the heat exchanger Place the screws aside Maintenance Manual SCWAR WENO94020 31 Maintaining the Sunny Central SMA Solar Technology AG 3 Pull the lid slightly forward 4 Remove the grounding of the lid The grounding cable is in the lower right hand corner of the heat exchanger 5 Place the lid aside 6 Disconnect the terminal
45. ulting from burning and electric shock upon touching the live components e Only work on the device when it is switched off and voltage free l First check the installation site for accessibility inflammable materials and safe positioning and then make sure that the Sunny String Monitor is attached to a horizontal installation and that a sufficient sun shading system is available for example by an installation in the PV field 2 Check whether the enclosure is damaged and properly sealed Maintenance Manual SCWAR WENO94020 55 Maintaining the Sunny String Monitor SMA Solar Technology AG 3 sure that the lid is securely in place and properly sealed Make sure that the cover locks are correctly closed they are closed under light pressure by means of a screwdriver until they lock into position 1 4 turning E Maintenance in Sunny String Monitor Further steps of maintenance work are carried out inside the Sunny String Monitor or affect the cabling that leading inside entre M s i EN EN ET TT ww BH HEN d m E E amp Du ieee eine pinta te 7 mm NY e J 4 Check whether there is condensation water in the device Wipe out the Sunny String Monitor check from where the water intruded the device and take corrective measures 5 Ch
46. ust possess training relevant to the activity performed and must be familiar with the content of this manual 2 1 3 Torque Always observe the torques of the individual components You will find the torques in the circuit diagram of the respective device If you cannot find the corresponding torques in the device s documentation contact the Sunny Central Service 8 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Maintaining the Sunny Central 3 Maintaining the Sunny Central The Sunny Central the string monitoring units and the communication units must be maintained at regular intervals Maintenance includes the following activities Inspection of wearing parts and replacement if necessary e Functional test of components Inspection of contact joints e Cleaning of cabinet interior if necessary A maintenance protocol is enclosed with every Sunny Central The maintenance protocol describes the maintenance work to be carried out and the maintenance interval recommended by SMA Solar Technology amp Maintenance intervals e 1 The maintenance interval depends the location and the ambient conditions A device installed in an environment with very dusty ambient air requires more frequent maintenance than recommended The maintenance interval is to be adapted accordingly 3 1 Identifying the Sunny Central You can identify the Sunny Central using the type label The type label is located on the inside of the
47. ut in the top part of the ventilation grid 3 If the filter pad needs to be replaced you can order it from SMA Article number 65 102011 4 Insert the filter pad During mounting the white side must point outwards and the bluish side to the inside of the switch cabinet w e Smaller filter pads There is no separate article number for the small filter pads which are installed in the older version of the Sunny Central 500 they have to be cut out from the large filter pads Maintenance Manual SCWAR WENO94020 11 Maintaining the Sunny Central SMA Solar Technology AG Cleaning the filter pads e Clean with water up to approx 40 C you can also additionally use commercially available mild detergent or vacuum the filter material or carefully use pressurized air to remove the contamination e For dust containing grease you should rinse with warm water and additionally use degreaser The air filter pad may not be cleaned with strong water jet or wrung out As soon as the air filter pads are cleaned and dried put them back into the frame Cleaning the ventilation grids grids can be cleaned using a paintbrush vacuum or applying pressurized air e Position of the ventilation grids With the help of some example cabinets the following section shows the exact position and size of the individual ventilation grids 3 4 2 Sunny Central 100LV SC 150 SC 125LV SC 200 200HE The swi
48. you should maintain them in regular intervals to ensure the optimal operation of the plant DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free The transformer can be found in the right part of the switch cabinet in the separated side chamber The sinusoidal filter can be found in the rear part of the switch cabinet The rear panel must be removed for maintenance work 1 Loosen the screws at the right rear panel and remove the rear panel The sinusoidal filter can now p be accessed 52 SCWAR WENO94020 Maintenance Manual SMA Solar Technology AG Additional notes for Sunny Central 100 2 Loosen the screws at the left rear panel and remove dm the rear panel The transformer can now be accessed e One piece rear panel Switch cabinets of the new construction type have a one piece rear panel 3 Visually inspect the individual components and make sure there is no corrosion Grease the contacts of the transformers and the sinusoidal filter connections if necessary 7 2 Checking the cable feed of the SC 100 outdoor DANGER Death resulting from electric shock and burning upon touching the medium voltage grid s live components e Only work on the device when it is switched off and voltage free 1 Check the space between the inverter cabinet and the roof as well as the

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