SMA SB 3300TL - Manual (Page 20)

Device Description SMA Technologie AG
Page 16 SB3300TL-11:FE1905 Operating Instructions
Grid Failure
When a grid failure occurs, the yellow failure LED is on for five seconds and then
starts the blinking code by staying off for three seconds and then blinking shortly
twice. The code is repeated three times.
If the failure persists, the signal starts from the beginning.
The Sunny Boy 3300TL indicates a grid failure by the signal described above which
can be caused by:
• Grid undervoltage
(UAC < „Uac-Min“)
• Grid overvoltage (UAC > „Uac-Max“)
• Grid underfrequency (fAC < „Fac-Min“)
• Grid overfrequency (fAC > „Fac-Max“).
• Grid frequency change („|dFac|“)
• Defective grid connection (e. g. if N and L have been mixed up)
Find out if there is a general power shutdown (by checking the function of other con-
sumers) and if the fuse of the inverter feeding cable is OK.
If you do not find any failure, the grid connection of the invert-
er has to be checked by a qualified electrician.
5 s 3 s 1 s
LED on LED off
Yellow LED blinks
shortly twice
The signal is repeated 3 times and
then starts from the beginning.