5 Troubleshooting
SMA America, LLC
28
SB30-40-BA-eng-BUS121010
User Manual
MSD-FAC
MSD-Idif
An internal measurement comparison error was detected.
The measured values of the two processors (operation control unit and
current control unit) are too far removed from each other.
Corrective measures:
• Contact installer.
MSD-VAC
OFFSET
The grid monitoring self-test failed.
The inverter disconnects itself from the power distribution grid. As soon as
the error has been remedied, the inverter tries to feed into the power
distribution grid again. If the inverter cannot feed into the power
distribution grid after several attempts, the inverter triggers the permanent
inhibition of operation.
Corrective measures:
• If the message occurs frequently, contact the installer.
ROM
The internal test of the inverter control system firmware failed.
The inverter disconnects itself from the power distribution grid. As soon as
the error has been remedied, the inverter tries to feed into the power
distribution grid again. If the inverter cannot feed into the power
distribution grid after several attempts, the inverter triggers the permanent
inhibition of operation.
Corrective measures:
• If the message occurs frequently, contact the installer.
Shut-Down
Overcurrent present at the DC input of the inverter.
The inverter switches off.
Corrective measures:
• Contact installer.
Vac-Bfr
Vac-Srr
The AC line voltage has exceeded the permissible range.
The cause may be disconnection of the power distribution grid or an AC
cable. The inverter disconnects itself from the power distribution grid to
prevent islanding.
Corrective measures:
• Contact installer.
Message
Cause and corrective measures
