SMA SB 4200TL Multi-String - Manual (Page 20)

Device Description SMA Technologie AG
Page 20 SB4200-12:FE4804 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.
With the above signal the Sunny Boy 4200TL Multi-String indicates a grid failure
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)
First find out whether there is a general power shutdown (by checking the function of
other consumers) and whether the fuse of the inverter feeding cable is OK.
If you do not find any failure, the grid connection of the inver-
ter 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.