SMA Solar Technology AG
Troubleshooting
Installation Manual
WB33-38-IA-IEN120940
57
9.2 Error Messages
When a disturbance occurs, the inverter generates a message depending on the operating mode and
the type of disturbance detected.
Message
Description / Remedial Action
!PV-Overvoltage!
!DISCONNECT DC!
DC Overvoltage
Disconnect the small wind turbine system from the inverter immediately.
1. Stop the small wind turbine system.
2. Disconnect the miniature circuit-breaker.
3. Disconnect the DC connectors.
4. Check the DC voltage:
– If the DC voltage is above the maximum input voltage, check
the plant design.
– If the DC voltage is below the maximum input voltage,
reconnect the small wind turbine system to the inverter as
described in Section 5.5.4 "Connecting the Small Wind Turbine
System (DC)" (page 34).
If the message is repeated, disconnect the inverter again and contact the
SMA Service Line.
ACVtgRPro
The 10-minute-average line voltage is no longer within the permissible
range. This can be caused by one of the following:
• The line voltage at the termination point is too high.
• The grid impedance at the termination point is too high.
The inverter disconnects to assure compliance with the power quality of
the electricity grid.
• Check the line voltage at the termination point of the inverter:
– If, due to the local grid conditions, the line voltage is 253 V or
more, ask the network operator whether the voltage at the feed-
in point can be adjusted, or whether they will accept an
adjustment of the limiting value of parameter "ACVtgRPro" for
power quality monitoring.
– If the line voltage is permanently within the tolerance range and
this error message is still displayed, contact the SMA Service
Line.
Bfr-Srr
Internal measurement comparison fault or hardware defect.
• Contact the SMA Service Line if this disturbance occurs frequently.
