Displays and Messages SMA America, LLC
66 SB50US-80US-eng-IUS112633 Installation Guide
Derating
The Sunny Boy can be operated with rated output power at an ambient temperature of up to +113 °F
(+45 °C). The Sunny Boy does remain operational at temperatures above +113 °F (+45 °C), but it
reduces the level of performance so as to protect the internal component parts from overheating.
8.2 LED Fault Indicators
Ground Fault
There is a ground fault in the PV plant. The inverter has disconnected from the grid. The ground fault
must be located and rectified before inverter operation can be resumed. The inverter will not restart
automatically.
Observe section 9 ”Troubleshooting” (page 77) for information on rectifying ground fault errors in
the PV array.
In "Turbine" mode, all GFDI fuses are deactivated.
Unwanted derating due to blocked fan inlets.
Clean the fan inlets regularly.
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