Error Messages - SMA Sunny Boy 3800U Installation Manual

Error Messages

In case of an fault, the SB3800U generates an error code according to the operating
mode and the type of fault detected.
Error Type Error Code
Disturbance Vac-Bfr
Vac-Srr
Disturbance Fac-Bfr
Fac-Srr
Disturbance Imax
Warning VpvMax
Error MSD-UAC
MSD-VAC
MSD-FAC
MSD-Idif
Error K1-Close
K1-Open
K2-Open
SB3800U-12:SE2006
Description
The AC grid voltage is exceeding the available range. ("Bfr"
or "Srr" is an internal message and is not important for the
user.) Vac can also result from a disconnected grid or a dis-
connected AC wire. The Sunny Boy assumes that the utility
grid is down and disconnects to prevent islanding.
Check the grid voltage and the grid wire connections in the
Sunny Boy enclosure. If the grid voltage is out of range due to
your local grid conditions contact the utility company. If the
grid voltage is within the tolerable range and you still observe
the failure message "Vac-Bfr" or "Vac-Srr" contact SMA.
The AC grid frequency is exceeding the allowable range.
("Bfr" or "Srr" is an internal function.) The Sunny Boy assumes
that the utility grid is down and disconnects to prevent island-
ing.
Check the grid frequency and the grid wire connections in the
Sunny Boy enclosure. If the grid frequency is out of range due
to your local grid conditions contact the utility company. If the
grid frequency is within the tolerable range and you still ob-
serve the failure message "Fac-Bfr" or "Fac-Srr", check for
possible intermittent connections. For additional assistance,
contact SMA.
Overcurrent on the AC side. This failure code is indicated if
the current to the AC grid exceeds the allowable limit. This
may happen due to harmful interference on the grid. If you
observe "Imax" often, check your grid conditions. For assis-
tance contact SMA.
DC input voltage above the maximum allowable limit.
Internal measurement comparison error: The internal BFS and
SRR processors are measuring different values. Contact SMA
for assistance.
Relay test failed. Contact SMA for assistance.
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