Troubleshooting SMA Solar Technology AG
56 SB33_38-IEN111851 Installation Guide
Shutdown Temporary inverter disturbance.
Corrective measures
• Contact the SMA Serviceline.
Trafo-Temp-F Temperatures in the transformer have exceeded the acceptable limit.
The inverter stops feeding the grid until the temperature lies within the
acceptable range.
Corrective measures
• If this problem recurs, check the heat dissipation of the inverter, as
described in section 8.1”Checking Heat Dissipation” (page47).
Trafo-Temp-W Temperatures in the transformer have exceeded the acceptable limit. The
inverter stops feeding the grid until the temperature lies within the
acceptable range. The Trafo-Temp-W warning is displayed until final
shutdown (at the end of the day).
Corrective measures
• Check the heat dissipation of the inverter, as described in section
8.1”Checking Heat Dissipation” (page47).
Vac-Bfr
Vac-Srr
The grid voltage on line 2 is no longer within the permissible range ("Bfr"
or "Srr" is an internal message that has no meaning for the user). This
code 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.
Corrective measures
• 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 electric power company if the
voltages can be adjusted at the feed-in point or if they agree to
changes in the values of the monitored operational limits (operating
parameters: Vac-Min and Vac-Max).
• If the grid frequency is within the tolerable range, yet "Vac-Bfr", or
"Vac-Srr" faults are still being displayed, please contact the
SMA Serviceline.
Message Description and Corrective Measure
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