SMA Sunny Boy Series

The grid voltage or grid impedance at the inverter's connection point is too high, leading to the inverter disconnecting from the utility grid. This action prevents damage to the inverter and helps maintain overall power quality.

The ten-minute average value of the grid voltage is no longer within the permissible range. This fault indicates that the grid voltage or grid impedance at the inverter's connection point is too high. The inverter disconnects from the utility grid to maintain power quality.

The inverter has disconnected from the utility grid because it detected a stand-alone grid condition or a very large change in the power frequency. This protects the inverter and grid from unstable power conditions.

The inverter has disconnected from the utility grid because a stand-alone grid was detected or a very large, short-term change in the power frequency occurred. This disconnection is a protective measure.

The power frequency is not within the permissible range, causing the inverter to disconnect from the utility grid. Frequent occurrences suggest a persistent issue with grid frequency stability.

The inverter has detected an excessively high proportion of direct current (DC) in the grid current. This can indicate an issue with grid quality or external DC sources influencing the AC grid, potentially harming connected equipment.

The inverter cannot connect to the utility grid because the configured country data set or the value of a user-set parameter does not comply with local grid requirements. This prevents proper grid synchronization and operation.

There is not enough power at the DC input of the inverter to enable stable operation, consequently preventing the inverter from connecting to the utility grid. This can be due to environmental factors or system design.

An overvoltage condition has occurred at the DC input, which poses a risk of destroying the inverter. This critical message is also signaled by rapid flashing of the LEDs, indicating an immediate need for intervention.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

The inverter has detected a ground fault in the PV array (3501), or the leakage current of the inverter and PV array is too high (3601), or a residual current due to temporary grounding of the PV array has been detected (3701). These conditions indicate defective or insufficient electrical insulation from the PV system to ground, potentially from a ground fault, residual current, or a malfunction causing high leakage current. The inverter will interrupt feed-in operation.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

An overcurrent condition has occurred at the DC input, causing the inverter to briefly interrupt feed-in operation as a protective measure. Frequent occurrences suggest issues with the PV array's design or wiring.

The necessary feed-in conditions for the utility grid have not yet been fulfilled, preventing the inverter from starting operation. This is often related to environmental conditions or initial setup parameters.

The update process for the inverter's user interface has failed. This indicates an issue during the software update of the WebUI component, potentially leaving the interface in an unstable state.

An internal fan fault has been detected within the inverter. This indicates a potential malfunction or failure of the cooling fan, which could lead to overheating and reduced performance or damage if not addressed.

An internal fan fault has been detected within the inverter. This indicates a potential malfunction or failure of the cooling fan, which could lead to overheating and reduced performance or damage if not addressed.

The inverter is not receiving any data from the connected energy meter. This fault indicates a disruption in the communication link between the inverter and the meter, preventing accurate energy monitoring.

The inverter has reduced its power output for more than ten minutes due to excessive internal temperature. This derating is a protective measure to prevent damage from overheating, impacting power generation capacity.

There is no valid signal detected on the network line connected to the inverter's interface. This indicates a complete loss of network connectivity, preventing data exchange with other devices.

The network data transfer rate of the inverter's interface has changed, specifically dropping to 10 Mbit. This reduced speed can severely impact communication performance and indicates an underlying issue with the physical connection.

The network duplex mode of the inverter's interface has changed, specifically dropping to Half duplex. This can lead to significant performance degradation due to collisions and retransmissions, pointing to a physical layer problem.

Communication between the BFR (Betriebsführungsrechner - Sequential Control System) and SRR (Stromregelungsrechner - Current Control System) micro-controllers is failing in the Sunny Boy SB50US-80US-IUS094030. This indicates an internal communication problem within the inverter.

The Sunny Boy SB50US-80US-IUS094030 inverter is reducing its output power because its internal temperature is too high. This protective measure prevents damage to internal components and typically occurs when the ambient temperature exceeds 45°C.

The earth current between the PV+ conductor and ground (GND), monitored by the BFR (Betriebsführungsrechner), has exceeded its acceptable operating range in the Sunny Boy SB50US-80US-IUS094030. This indicates a ground fault in the PV array. The inverter will disconnect from the grid.

The earth current between the PV+ conductor and ground (GND), monitored by the SRR (Stromregelungsrechner), has exceeded its acceptable operating range in the Sunny Boy SB50US-80US-IUS094030. This indicates a ground fault in the PV array. The inverter will disconnect from the grid.

A transition failure occurred during the reading or writing of non-essential data in the EEPROM of the Sunny Boy SB50US-80US-IUS094030. This issue does not impact the inverter's performance or its safe operation.

The data EEPROM within the Sunny Boy SB50US-80US-IUS094030 is defective, leading to data loss that affects critical inverter functions. As a result, the device is set to a permanent disable state for safety.

An unspecified internal failure has occurred within the Sunny Boy SB50US-80US-IUS094030 inverter.

The AC grid frequency has exceeded or fallen below the allowable operating range for the Sunny Boy SB50US-80US-IUS094030. The inverter interprets this as a public grid outage and disconnects from the grid to prevent islanding. 'Bfr' and 'Srr' are internal processor messages.

The Ground Fault Detection and Interruption (GFDI) fuse, located in the fuse holder on the circuit board of the Sunny Boy SB50US-80US-IUS094030, has cleared or is not present. This fuse is critical for protecting the PV system in the event of an array ground fault.

The Sunny Boy SB50US-80US-IUS094030 inverter failed to detect the type of connected grid (208V, 240V, or 277V). This can be caused by incorrect wiring, especially when connecting to specific grid types.

The current being fed to the AC grid by the Sunny Boy SB50US-80US-IUS094030 exceeds the specified maximum limit. This condition may be triggered by harmful interference or abnormal load conditions on the grid.

An internal self-test for a relay (K1) within the Sunny Boy SB50US-80US-IUS094030 inverter has failed. This indicates a potential malfunction of the relay or its control circuit.

An internal measurement comparison error has occurred in the Sunny Boy SB50US-80US-IUS094030, indicating a significant discrepancy between the values measured by the BFR (Betriebsführungsrechner) and SRR (Stromregelungsrechner) processors. This suggests an inconsistency in internal data acquisition related to frequency (FAC) or differential current (Idif).

The internal self-test for the grid monitoring system has failed in the Sunny Boy SB50US-80US-IUS094030. This system is crucial for ensuring safe and compliant grid interconnection. This is distinct from the startup offset calibration.

The internal self-test of the Sunny Boy SB50US-80US-IUS094030's control system firmware (ROM) has failed. This indicates a potential issue with the integrity or functionality of the inverter's embedded software.

The Sunny Boy SB50US-80US-IUS094030 has detected a continuous internal overcurrent condition and has initiated a shutdown to protect its components from damage.

The AC grid voltage has exceeded or fallen below the allowable operating range for the Sunny Boy SB50US-80US-IUS094030. This can also be caused by a disconnected grid or a disconnected AC cable. The inverter assumes a public grid outage and disconnects to prevent islanding. 'Bfr' and 'Srr' are internal processor messages.

The voltage measured on a specific AC grid leg (L1 or L2) is either too high or too low for the Sunny Boy SB50US-80US-IUS094030, indicating an imbalance or out-of-tolerance condition on that particular phase. 'Bfr' and 'Srr' are internal processor messages.

The DC input voltage supplied from the PV array has surpassed the maximum tolerable value for the Sunny Boy SB50US-80US-IUS094030 inverter. This condition can lead to component damage if not addressed immediately.

The internal watchdog timer, which monitors the Sunny Boy SB50US-80US-IUS094030's operation control system for anomalies, has been triggered. This usually indicates a system freeze or an unexpected software execution path.

The Sunny Boy SB50US-80US-IUS094030's internal transformer is incorrectly connected or configured for the present grid type. This issue can manifest in Delta corner-grounded grids if the grid ground is not connected to terminal L2, or in unbalanced 208V/240V grids if L1 and L2 are interchanged.

The internal transformer of the Sunny Boy SB50US-80US-IUS094030 has reached an excessively high temperature, causing the inverter to cease operation. The cooling fans will automatically activate and run at maximum speed to reduce the temperature.

This warning indicates that a previous condition of high transformer temperature in the Sunny Boy SB50US-80US-IUS094030 has subsided, and the inverter has resumed operation. It serves as an alert to investigate the cooling system to prevent recurrence.