Schüco SUNNY BOY Series User Manual
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Schüco SUNNY BOY Series User Manual

Schüco SUNNY BOY Series User Manual

Pv inverters
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PV Inverters
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SUNNY BOY
SUNNY MINI CENTRAL
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Summary of Contents for Schüco SUNNY BOY Series

  • Page 1 User Manual “ PV Inverters SUNNY BOY “ SUNNY MINI CENTRAL...
  • Page 2 SMA, Sunny, Sunny Boy, Sunny Central, Sunny Island, Sunny Backup, Sunny Beam, Sunny Design, Sunny Portal, Sunny WebBox, Multi-String, OptiCool, H5, grid guard, Power Balancer are registered trademarks of SMA Solar Technology AG. SB_SMC_Schueco-BEN093730 | TBEN-ALL-K9A...

  • Page 3: Table Of Contents

    SMA Solar Technology AG Table of Contents Table of Contents Notes on this Manual......5 Area of Validity.
  • Page 4 Table of Contents SMA Solar Technology AG 3.4.9 The yellow LED blinks 7 times ........23 Information on the Display .

  • Page 5: Notes On This Manual

    SMA Solar Technology AG Notes on this Manual 1 Notes on this Manual This manual contains instructions on how to operate the SMA inverters Sunny Boy and Sunny Mini Central. Store this manual where it will be accessible at all times. 1.1 Area of Validity This manual applies to the following SMA inverters: Sunny Boy...

  • Page 6: Symbols Used

    Notes on this Manual SMA Solar Technology AG 1.4 Symbols Used The following types of safety instructions and general information are used in this manual: 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.

  • Page 7: Safety

    SMA Solar Technology AG Safety 2 Safety 2.1 Appropriate Usage The Sunny Boy / Sunny Mini Central is a solar inverter which converts the DC current of the PV generator to AC current and feed it into the public grid. More precise information on this subject and on your device can be found in the installation guide. The operational limits specified in the installation guide for the particular inverter must be observed.
  • Page 8 Safety SMA Solar Technology AG Principle of a grid-connected PV system with a Sunny Mini Central SB_SMC_Schueco-BEN093730 User Manual...

  • Page 9: Safety Precautions

    SMA Solar Technology AG Safety 2.2 Safety Precautions DANGER! High voltages in the inverter. Death resulting from electric shock and burns. The following work on the inverter must be carried out by a qualified personnel only. • Electrical installation • Repairs •...

  • Page 10: Identifying The Product

    Safety SMA Solar Technology AG 2.3 Identifying the product You can identify the inverter by the type plate. The type plate is usually located on the right side of the enclosure. Schüco International KG Karolinenstraße 1-15 The type plate specifies among other things the device 33609 Bielefeld, Germany type (Type / Model), the serial number (Serial No.) and ®...

  • Page 11: Operating Modes

    SMA Solar Technology AG Operating Modes 3 Operating Modes The different operating modes are indicated by 3 light-emitting diodes (LEDs) on the inverter lid, and also via the integrated display (see Section 4 "Information on the Display" (page 24)). To allow the device to signal its operating mode via the 3 integrated LEDs, the inverter must be connected to the DC side of the system.

  • Page 12: Activating The Display Illumination

    Operating Modes SMA Solar Technology AG 3.1 Activating the Display Illumination The background illumination is switched on by tapping on the enclosure lid. Tapping again switches the display on to the next message. After 2 minutes, the illumination switches off automatically. 3.2 Initial Phase 3.2.1 All LEDs are on Initialization...

  • Page 13: The Green Led Is Continuously On

    SMA Solar Technology AG Operating Modes 3.3.2 The green LED is continuously on Feeding Operation The inverter has passed the self-tests of the measurement electronics and grid monitoring, and is now in normal grid-feed operation. 3.3.3  The green LED is blinking slowly Waiting, Grid Monitoring The inverter is checking if the start conditions necessary for feeding the grid (e.g.

  • Page 14: The Green Led Goes Out Briefly

    Operating Modes SMA Solar Technology AG 3.3.5 The green LED goes out briefly Derating The "Derating" mode is a normal operating mode which may occur occasionally and can have several causes: • Temperature derating The temperature monitoring of the inverter has reduced the output power to prevent the device from overheating.

  • Page 15: Failures

    SMA Solar Technology AG Operating Modes 3.4 Failures A distinction is made between critical and non-critical failure messages. Thanks to a comprehensive safety concept the number of critical conditions that can occur has been reduced to one single situation: PV generator voltage is too high. This is indicated by the following blink code on the yellow LED: The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the following blink code: 3 seconds off and then 4 brief consecutive blinks.

  • Page 16: The Red Led Is Continuously On

    Operating Modes SMA Solar Technology AG 3.4.1 The red LED is continuously on Insulation Fault or Defective Varistor The red LED on the Sunny Boy / Sunny Mini Central is permanently on. With this blink code it is irrelevant whether the green or yellow LEDs are on or blinking. A grounding error has occurred, or one of the thermally monitored varistors on the DC input side is defective as a result of overvoltage or ageing.

  • Page 17: The Red Led Is Blinking

    SMA Solar Technology AG Operating Modes 3.4.2 The Red LED is blinking Fault on the DC side Red LED blinking. This blink code overrides any signals on the green or yellow LEDs. This blink code can only occur in the following device types: •...

  • Page 18: The Yellow Led Blinks Twice

    Operating Modes SMA Solar Technology AG 3.4.4 The yellow LED blinks twice Grid fault The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the following blink code. 3 seconds off and then 2 brief consecutive blinks. This code is emitted 3 times in succession.

  • Page 19: The Yellow Led Blinks 3 Times

    SMA Solar Technology AG Operating Modes 3.4.5 The yellow LED blinks 3 times Grid impedance The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the following blink code. 3 seconds off and then 3 brief consecutive blinks. This code is emitted 3 times in succession.

  • Page 20: The Yellow Led Blinks 4 Times

    Operating Modes SMA Solar Technology AG 3.4.6 The yellow LED blinks 4 times The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the following blink code. 3 seconds off and then 4 brief consecutive blinks. This code is emitted 3 times in succession.

  • Page 21: The Yellow Led Blinks 5 Times

    SMA Solar Technology AG Operating Modes 3.4.7 The yellow LED blinks 5 times Device fault The yellow fault LED lights up for 5 seconds when the fault occurs, and then starts emitting the following blink code. 3 seconds off and then 5 brief consecutive blinks. This code is emitted 3 times in succession.

  • Page 22: The Yellow Led Blinks 6 Times

    Operating Modes SMA Solar Technology AG 3.4.8 The yellow LED blinks 6 times Discharge current too high Discharge current The fault "Discharge current too high" can only occur in transformerless inverters. Transformerless inverters can be identified by their device designation. The "TL" in the name stands for transformerless, e.g.

  • Page 23: The Yellow Led Blinks 7 Times

    SMA Solar Technology AG Operating Modes 3.4.9 The yellow LED blinks 7 times Drastic change in differential current Differential current The fault "Drastic change in differential current" can only occur in transformerless inverters. Transformerless inverters can be identified by their device designation. The "TL" in the name stands for transformerless, e.g.

  • Page 24: Information On The Display

    Information on the Display SMA Solar Technology AG 4 Information on the Display Sunny Boy and Sunny Mini Central inverters are supplied with a factory-installed LC display on the enclosure lid. Display Messages Detailed explanations of the individual error and fault messages can be found in Section 6 "Measurement Channels and Messages"...

  • Page 25: Display Messages During Operation

    SMA Solar Technology AG Information on the Display 4.2 Display Messages During Operation The display shows the most important operating data of the inverter in an alternating cycle. The following diagrams serve to clarify the messages. Each message is displayed for 5 seconds. Then the cycle starts over again.

  • Page 26: Display Messages For Plant Disturbances

    Information on the Display SMA Solar Technology AG 4.2.2 Display Messages for Plant Disturbances If an operational failure occurs, the display immediately switches to "Disturbance" and the background illumination lights up. In this case the inverter stops feeding into the grid. The following illustrations give examples of possible failure scenarios.

  • Page 27: Maintenance And Cleaning

    SMA Solar Technology AG Maintenance and Cleaning 5 Maintenance and Cleaning Check the correct operation of the inverter at regular intervals. Impurities such as dust or pollen can cause heat accumulation that can lead to yield losses. Also check the inverters and the cables for visible external damage.

  • Page 28: Measurement Channels And Messages

    Measurement Channels and Messages SMA Solar Technology AG 6 Measurement Channels and Messages If your inverter is equipped with a communication component, then numerous measurement channels and messages to aid diagnosis can be transmitted. The following abbreviations apply: BFR: Operation control unit SRR: Current control unit 6.1 Measuring Channels Measuring...

  • Page 29: Status Messages

    SMA Solar Technology AG Measurement Channels and Messages Measuring Description channel PV input voltage Vpv-Setpoint PV target voltage Grid impedance 6.2 Status Messages The inverters can be in various operating modes. These are displayed as status messages which can vary according to the method of communication. Message Description and corrective measure Balanced...
  • Page 30 Measurement Channels and Messages SMA Solar Technology AG Message Description and corrective measure Derating Overtemperature in the inverter. The inverter reduces its output to prevent the device from overheating. Corrective measures • In the case of fan devices check heat dissipation, as described in Section 5.1 "Checking Heat Dissipation"...
  • Page 31 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure grid. mon Testing the grid status, relay test etc. This message occurs during the startup phase before the Sunny Boy or Sunny Mini Central has connected to the grid. The message usually appears in the morning and evening when there is little solar irradiation.

  • Page 32: Error Messages

    Measurement Channels and Messages SMA Solar Technology AG 6.3 Error messages If an error occurs, the Sunny Boy and Sunny Mini Central generate a message which depends on the operating mode and the error detected. Message Description and corrective measure !PV-Overvoltage! Overvoltage at DC input.
  • Page 33 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure DCBFS-Startup Internal communications fault. Corrective measures • Please contact your installer or the SMA Solar Technology Serviceline if this problem recurs. DC fuse At least one of the string fuses is defective (only applies to Sunny Mini Central models 9000TL / 1000TL / 11000TL).
  • Page 34 Measurement Channels and Messages SMA Solar Technology AG Message Description and corrective measure dI-Bfr The inverter has detected a drastic change in the differential current. This fault only occurs in transformerless inverters that have no galvanic dI-Srr isolation from the grid. The integrated differential current monitoring system plays an important part in ensuring personal safety.
  • Page 35 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure EEPROM Transition disturbance during reading or writing of EEPROM data. This data is not essential for safe operation. • The disturbance has no effect on the performance of the inverter. EEPROM dBh EEPROM data is defective, the device has switched off because the loss of data has disabled important functions of the inverter.
  • Page 36 Measurement Channels and Messages SMA Solar Technology AG Message Description and corrective measure Imax Overcurrent on the AC side. This fault code is displayed if the current in the AC grid is greater than specified. Corrective measures • Please contact your installer to have the plant configuration and the grid conditions checked.
  • Page 37 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure MWE Defect DC Internal measurement comparison fault or hardware defect. Corrective measures • Please contact your installer or the SMA Solar Technology Serviceline if this problem recurs. MSD-dI Internal measurement comparison fault or hardware defect.
  • Page 38 Measurement Channels and Messages SMA Solar Technology AG Message Description and corrective measure Rechner / Functional fault in one of the two microcontrollers. MSD-Timeout Corrective measures • Please contact your installer or the SMA Solar Technology Serviceline when this problem occurs several times in succession. Relais 1 A grid relay is faulty.
  • Page 39 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure Riso / Earthfault The electrical insulation of the PV system to ground is faulty. The resistance between the DC plus and/or DC minus connection and ground is outside the defined limit range. Corrective measures •...
  • Page 40 Measurement Channels and Messages SMA Solar Technology AG Message Description and corrective measure STM-Timeout Internal program run fault. Corrective measures • Please contact your installer or the SMA Solar Technology Serviceline if this problem recurs. Trafo-Temp-F Temperatures in the transformer have exceeded the acceptable limit. The inverter stops feeding the grid until the temperature reverts to within the admissible range.
  • Page 41 SMA Solar Technology AG Measurement Channels and Messages Message Description and corrective measure VpvMax Overvoltage at DC input. Vpv-Max Corrective measures • Please contact your installer who will immediately disconnect the PV generator from the inverter! Otherwise, the inverter may be damaged.

  • Page 42: Glossary

    Glossary SMA Solar Technology AG 7 Glossary Abbreviation for "Alternating Current" Abbreviation for "Direct Current" Derating A controlled reduction in performance, usually dependent on component temperatures. Compared with the (also common) practice of completely shutting down the device, derating has a less drastic effect on the external grid.
  • Page 43 SMA Solar Technology AG Glossary PV module A collection of solar cells in an enclosure that protects the sensitive cells from mechanical stress and allows easy installation. Reactive Power Control Inverters with Reactive Power Control are inverters capable of utilizing reactive power. By setting a default value for the displacement factor (cos ϕ) they can feed reactive power to the grid.
  • Page 44 Glossary SMA Solar Technology AG String inverter In string technology, the PV generator is subdivided into individual module surfaces, or "strings", each of which has an assigned string inverter. This technology reduces system costs while at the same time making installation a lot simpler and increasing the energy yield and system availability. Unbalanced load The difference between the power fed into the grid at the individual phase conductors.

  • Page 45: Contact

    SMA Solar Technology AG Contact 8 Contact If you have technical problems concerning our products, please contact our Serviceline. We require the following information in order to provide you with the necessary assistance: • Inverter type • Communication method • Type and number of modules connected •...
  • Page 46 Contact SMA Solar Technology AG SB_SMC_Schueco-BEN093730 User Manual...
  • Page 47 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.
  • Page 48 Schüco International KG – Karolinenstraße 1-15 – 33609 Bielefeld...

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