SMA SB 2800i - Manual (Page 40)

Technical Documentation Operating Instructions
38 SMA Regelsysteme GmbH SB2800i-11:FE0504
6.4.5 Failure Messages
In case of a failure the Sunny Boy 2800i generates the failure code according to the operating
mode and the detected failure.
Failure Code Descripition
Uac-Bfr/
Uac-Srr The AC grid voltage is exceeding the permissible range. („ Bfr“ or „ Srr“ is an
internal message and is not important for the user.) Uac can also result from a
disconnected grid or a disconnected AC cable. The Sunny Boy assumes that the
public grid is down and disconnects from the grid in order to avoid islanding.
Check the grid voltage and the grid cable connection in the Sunny Boy
enclosure. If the grid voltage is out of range due to your local grid conditions
contact the utility company and ask if it is possible to modify the utility
conditions. If the grid voltage is within the tolerable range and you still observe
the failure message „ Uac-Bfr“ or „ Uac-Srr“ contact SMA.
Fac-Bfr
Fac-Srr The AC grid frequency is exceeding the permissable range. („ Bfr“ or „ Srr“ is
an internal message and is not important for the user.) The Sunny Boy assumes
that the public grid is down and disconnects from the grid in order to avoid
islanding.
Check the grid frequency and the grid cable connection in the Sunny Boy
enclosure. If the grid frequency is out of range due to your local grid conditions
contact the utility company and ask if it is permissable to change the grid
monitoring parameters of the Sunny Boy. Contact SMA about how to change
the grid monitoring parameters of your Sunny Boy. If the grid frequency is within
the tolerable range and you still observe the failure message „ Fac-Bfr“ or
„ Fac-Srr“ contact SMA.
Zac-Bfr/
Zac-Srr The AC grid impedance is exceeding the permissable range. („ Bfr“ or „ Srr“ is
an internal message and is not important for the user.) The Sunny Boy assumes
that the public grid is down and disconnects from the grid in order to avoid
islanding.
The impedance is the sum of the grids internal impedance and the impedance
of the AC cable that connects the Sunny Boy to the grid.
Check the grid impedance and the grid cable connection in the Sunny Boy
enclosure. Use a cable with a higher cross section (=lower impedance) for
connection of the Sunny Boy to the grid. If the grid impedance is out of range
due to your local grid conditions contact the utility company and ask if it is
possible to modify the utility conditions.