Troubleshooting
SMA Solar Technology AG
60
WB33-38-IA-IEN120940
Installation Manual
Vac-Bfr
Vac-Srr
The line voltage is no longer within the permissible range ("Bfr" or "Srr" is
an internal message of no relevance for the user). This disturbance can
be caused by any of the following conditions:
• Grid disconnected (miniature circuit-breaker, fuse),
• AC cable is interrupted or
• AC cable is highly resistive.
The inverter disconnects from the electricity grid for safety reasons.
• Check the line voltage and grid connection on the inverter.
• If the line voltage is outside the permissible range because of local
grid conditions, ask the network operator if the voltages can be
adjusted at the feed-in point or if they will accept adjustments to the
values of the monitored operating limits
(operating parameters: Vac-Min and Vac-Max).
• If the line voltage is within the tolerance range, yet "Vac-Bfr" or
"Vac-Srr" faults are still displayed, contact the SMA Service Line.
VpvMax
Vpv-Max
Overvoltage at the DC input. This could damage the inverter.
Disconnect the small wind turbine system from the inverter immediately.
1. Stop the small wind turbine system.
2. Disconnect the miniature circuit-breaker.
3. Remove all 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.
Watchdog
Watchdog Srr
Internal disturbance of the program sequence.
• Contact the SMA Service Line if this disturbance occurs frequently.
Message
Description / Remedial Action
