SMA SB 2800i - Manual (Page 21)

Operating Instructions Device Description
SB2800i-11:FE0504 SMA Regelsysteme GmbH 19
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 2800i indicates a grid
failure which can be caused by:
• Grid undervoltage (U
AC
< „ Uac-Min“)
• Grid overvoltage (U
AC
> „ Uac-Max“)
• Grid underfrequency (f
AC
< „ Fac-Min“)
• Grid overfrequency (f
AC
> „ Fac-Max“).
• Grid frequency change („ |dFac|“)
• Defective grid connection
(e. g. if N and L are not connected)
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 inverter
has to be checked by a qualified electrician.