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Conergy SunEasy Grid Connect Kit - User Manual
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Rev 0 - 0704
3.2 To Check Systems with the SMA Sunny Boy Inverter
3.2.1 Operating Mode Indication
The SMA inverter displays the actual operating status with three LEDs on the inverter lid.
The owner/user of the solar power system should regularly inspect and take note of the inverter LED indications to
make sure that the solar power system is in good condition and it is working fault free. It is even more important
to carry out this LED status check during the early months after the installation, at different times of the day under
different sunlight conditions. You will find a complete description of all LED signal codes in the SMA Sunny Boy
Inverter Manual.
3.2.2 Normal Operating Mode
As long as no LED or only the green LED is blinking, the Sunny Boy is in its normal operating status. If all three
LEDs are on, the inverter is in its initialization phase which is a normal operating state as well. All other signals
indicate a disturbed operating state. Refer to the inverter manual for more information on the different LED signal
codes.
3.2.3 Description of Operating Mode
Standby at Night
Initialisation
If all LEDs are off then the Sunny Boy is in standby operation
mode. This state indicates that the input voltage at the inverter is
too low to be fed into the utility grid.
If all three LEDs are on then the on-board computer of the Sunny
Boy is in the initialization phase. At least one of the string voltages
on the inverter is in the acceptable range. Power is already
supplied to the internal board, but is not yet sufficient to be fed
into the utility grid. Data transmission is not possible at this stage.
Betrieb
Operation
Erdschluss
Earth Fault
Störung
Failure
All LEDs are off
All LEDs are on