5 Troubleshooting SMA America, LLC
30 SB6-11TLUS-BA-eng-BUS121211 User Manual
IGBTs The inverter has detected a disturbance in the power electronics.
The inverter disconnects 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 trips the permanent
operation inhibition.
Corrective measures:
• Contact installer.
MSD-FAC
MSD-Idif
The inverter has detected an internal measurement comparison
disturbance or the hardware is defective.
The inverter disconnects 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 trips the permanent
operation inhibition.
Corrective measures:
• Contact installer.
MSD-VAC
Offset The grid monitoring self-test has failed.
The inverter disconnects 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 trips the permanent
operation inhibition.
Corrective measures:
• If the message occurs frequently, contact the installer.
PowerBalancer Three Sunny Boys are combined into one three-phase feed-in unit to
prevent unbalanced loads. The parameter "PowerBalancer" is set to
"PhaseGuard" or "FaultGuard".
REL_INV_CLOSE
REL_GRID_CLOSE
A grid relay does not close. The inverter checks the relays connecting it to
the power distribution grid before feeding power into the grid.
If the grid relays do not function properly, the inverter cannot connect to
the power distrubution grid.
Corrective measures:
• Contact installer.
Message Cause and corrective measures
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