SMA WB 3300-11 - Manual (Page 16)

LED Signals SMA Solar Technology AG
16 WB33_38-BA-BEN120930 User Manual
Red LED is on An earth fault has occurred or one of the thermally
monitored varistors on the DC input side is defective.
Please inform your installer.
Yellow LED is on The inverter is in the operating state
"Operation permanently disabled". This can have several
causes. Please inform your installer.
Yellow LED is
flashing This indicates a disturbance. This can have several causes.
Please inform your installer.
Status Description