SMA WINDY BOY 3300 - Page 55

SMA Solar Technology AG Troubleshooting
Installation Guide WB33_38-IEN101830 55
Vac-Bfr
Vac-Srr
The grid 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 (line circuit breaker, fuse),
•AC cable is broken or
• AC cable is highly resistive
For safety reasons, the inverter disconnects itself from the grid.
• Check the grid current and grid connection on the inverter.
• If the grid voltage lies outside the acceptable range because of
local grid conditions, ask the utility provider if the voltage can be
adjusted at the feed-in point or if it would agree to changes in the
values of the monitored operational limits (operating parameters:
Vac-Min and Vac-Max).
• If the grid voltage is within the tolerable range, yet "Vac-Bfr," or
"Vac-Srr" faults are still being displayed, please contact the
SMAServiceline.
Vpv-Max Overvoltage at DC input. The inverter may be damaged.
Disconnect the small wind turbine system from the inverter immediately.
1. Turn off the line circuit breaker.
2. Stop the small wind turbine system.
3. Disconnect all the DC connectors.
4. Check DC voltage:
– If the DC voltage is above the maximum input voltage, check
the system design.
–If the DC voltage is under 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32).
If the message occurs again, disconnect the inverter again and contact
the SMA Serviceline.
Watchdog
Watchdog Srr
Internal disturbance during program operation.
• If this fault occurs often, contact the SMA Serviceline.
Message Description / Remedy