Troubleshooting SMA America, LLC
80 SB30-40US-IUS103030 Installation Guide
Warning XFMR_TEMP_W High transformer temperature is gone. The Sunny Boy
starts working and shows the failure
“XFMR_TEMP_W“. Verify that the fans are operating
normally and that the intake screens are clean. Check
the intake vents for debris. Verify that there is
adequate ventilation around the inverter. This
condition may be normal in periods of high ambient
temperatures above +113 °F (+45°C).
Error Type Error Code Description
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