SMA SB 3300-11 - Manual (Page 15)

SMA Solar Technology AG LED Signals
User Manual SB33_38-BA-BEN114230 15
Red LED is on A ground fault has occurred or one of the thermally
monitored varistors on the DC input side is defective.
Inform your installer.
Yellow LED is on The inverter is in the operating state
"Permanent shutdown". This can have several causes.
Inform your installer.
Yellow LED is
blinking The inverter displays a disturbance. This can have
several causes. Inform your installer.
Status Description