User manual CONTAX SWR 2500U V1.2

[. . . ] Sunny Boy SWR 2500U Installation and Operator's Manual Issue 1. 2 Grid Tied String Inverter for Photovoltaic Systems SB2500U-11:NE3801 Sunny Boy 2500U Installation and Operator's Manual SB2500U-11:NE -2- SMA Regelsysteme GmbH Sunny Boy 2500U Installation and Operator's Manual IMPORTANT SAFETY INSTRUCTIONS This manual contains important instructions that shall be followed during installation and maintenance of the Sunny Boy. To reduce the risk of electrical shock, and to ensure the safe installation and operation of the Sunny Boy, the following safety symbols have been placed throughout this technical description to indicate dangerous conditions and important safety instructions. WARNING: This indicates a fact or feature very important for the safety of the user and / or which can cause a serious hardware defect if not applied appropriately. Use extreme caution when performing this task. NOTE: This indicates a feature that is important either for optimal and comfortable usage or optimal operation of the system. [. . . ] The open circuit voltage of the PV-panel will therefore not be displayed. The internal consumption is negligible for the voltage measurement with higher solar radiation. The operating state of the Sunny Boy will be indicated with three LEDs integrated into the lid. The meaning of the LEDs will be explained in chapter 4, "Operation and Failure Indication LEDs". SB2500U-11:NE - 23 - SMA Regelsysteme GmbH Sunny Boy 2500U Installation and Operator's Manual 4 Operation and Failure Indication LEDs The inverter normally operates automatically, without user interaction and without any maintenance. The inverter automatically turns itself off when a grid feeding is not possible (e. The Sunny Boy automatically starts its grid feeding the next day once the solar radiation is high enough. The inverter goes to standby mode if the radiation and the resulting electric input energy is too low and is therefore always ready for operation. Each time the Sunny Boy starts up it runs a number of self test and safety procedures which the user does not notice. The user can obtain the inverter's operating status from the 3 integrated LEDs on the lid (see Table 4. 1: Operation indication overview). The green LED "Operation" describes the current operation of the Sunny Boy, see chapter 4. 1 "Operation Indicator". The red LED warns the user that the GFDI-fuse is defective. A description of this situation and what has to be done in that case is given in chapter 4. 2. The yellow LED "Failure" indicates an internal or external failure that keeps the inverter from feeding the grid. The specific causes for this and how to avoid them are described in chapter 4. 3 "Failure Indication". The red and yellow LED combined indicate that the internal Ground Fault Detector and Interupter (GFDI) has detected a ground fault in the PV panel. A description of this situation and what has to be done in that case is given in chapter 4. 2. SB2500U-11:NE - 24 - SMA Regelsysteme GmbH Sunny Boy 2500U Installation and Operator's Manual Betrieb Operation SWR 2500 Photovoltaik-Stringwechselrichter Photovoltaic string inverter Erdschluß Earth Fault Störu ng Failure Fig. 4. 1: Front view of Sunny Boy 2500U Description of the symbols used in the following section: LED off LED on once per second LED on three times per second LED on with short interruptions (75% on, 25% off) LED on Not important SB2500U-11:NE - 25 - SMA Regelsysteme GmbH Sunny Boy 2500U Installation and Operator's Manual LED indicator green: red: yellow: Operating condition standby (night) Description input voltage < 120 V green: red: yellow: initialization input voltage: 120 V . . . 240 V green: red: yellow: stop changing operating condition or manually initiated condition green: red: yellow: waiting, checking grid starting conditions are being checked green: red: yellow: feeding grid MPP or constant voltage mode normal operation green: red: yellow: derating mode Reduction of power fed to the grid due to increased temperature of the heat sink green: red: yellow: insulation failure ground fault of the PV-panels see chapter 4. 2 green: red: yellow: failure GFDI fuse is defective see chapter 4. 2 green: red: yellow: failure internal or external failure, exact description depending on blink code see chapter 4. 3 green: red: yellow: Consistent Failure A failure of the utility has occurred Table 4. 1: Operation indication overview - 26 - SB2500U-11:NE SMA Regelsysteme GmbH Sunny Boy 2500U Installation and Operator's Manual 4. 1 Operation Indicator Standby (night) all LEDs are off The Sunny Boy is in "Standby" mode. The input voltage is too low (VPV < 120 V) for supplying the Sunny Boy control system with enough power. Initialization all LEDs are on The Sunny Boy control system is initializing. The string voltage to the inverter is between approx. The supply is sufficient for the system control and not quite sufficient for feeding to the grid. NOTE: In some seldom cases (bad weather, low solar radiation) the LEDs can go on all at once and off again. This "blinking" results from the fact that the incoming radiation is not high enough for the Sunny Boy to keep it stable. [. . . ] Therefore it has to take into account the lowest possible ambient temperature of the PV panel when planning the PV plant. Based on this temperature and knowing the type of PV modules used you can then determine the maximum open circuit voltage of the PV panel. You can enter these data into our EXCEL® tool "GenAu" and check whether the maximum admissible input voltage of the Sunny Boy is not exceeded under any possible operating conditions. You will find this tool in the Internet for download at: http://www. SMA. de/ftp/energietechnik/sunnyboy/GenAu/GenAu. exe WARNING: The MPP-voltage of the connected PV-modules may not fall below the specified range at 158 °F (+70 °C) (VMPP +158 °F > min. [. . . ]