SMA SB 3300TL - Manual (Page 49)

SMA Technologie AG Technical Documentation
Operating Instructions SB3300TL-11:FE1905 Page 45
7.4.5 Failure Messages
In case of a failure the Sunny Boy 3300TL generates the failure code according to
the operating mode and the detected failure.
Failure Code Descripition
CAN
Kom DC-BFS
DC-BFS-Startup Internal communication failure. Contact SMA in case you observe
this failure very often.
DCBFS Version The DC-BFS has a wrong firmware. Contact SMA in case you ob-
serve this failure.
Delta Bfr-Srr
NUW-dI
NUW-FAC
NUW-UAC
NUW-ZAC
NUW-Timeout Internal measurement comparison error: The Sunny Boy 3300TL
measured values of BFR and SRR are too different from each other.
dFac-Bfr
dFac-Srr The rate of change of the AC grid frequency is exceeding the per-
missible range („Bfr“ or „Srr“ is an internal message and is not im-
portant 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 rate of fluctuation. If the grid fre-
quency fluctuates often and thus „dFac-Bfr“ or „dFac-Srr“ failures
often occur consult the utility company 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.
dI-Bfr
dI-Srr The Sunny Boy 3300TL has detected a drastic change of the dis-
charge current. As the Sunny Boy 3300TL is a transformerless in-
verter there is no electric separation. A sophisticated and effective
discharge current monitoring is an important element of the person-
nel protection.
A drastic change of the discharge current can be the result of a mal-
function or a sudden dangerous ground fault. The Sunny Boy dis-
connects all poles (DC and AC). Have a qualified technician check
the isolation and the ground connection in case the message „dI-
Bfr“ or „dI-Srr“ is displayed without any obvious cause in your sys-
tem.
dI-Mess Defective acquisition of differential current / fault current - the Sun-
ny Boy is deactivated for the rest of the day and will return to nor-
mal operation on the next day. A restart will reset the Sunny Boy to
normal operation as well.