Troubleshooting SMA Solar Technology AG
54 SB33_38-IEN111851 Installation Guide
Derating The "Derating" operating mode is a normal operating mode which may
occur occasionally and can have several causes.
Once the inverter enters the "Derating" mode, it will display the "Derating"
warning until the next total shutdown of the device (at the end of the day).
Corrective measures
• Check heat dissipation as described in section 8.1”Checking Heat
Dissipation” (page47).
dZac-Bfr
dZac-Srr
Sudden changes in grid impedance exceed the permissible range ("Bfr"
or "Srr" are internal messages of no relevance for the user).
For safety reasons, the inverter disconnects itself from the grid.
Corrective measures
Check the grid impedance and observe how often major deviations
occur.
• If repeated frequency variations occur and this is causing
"dZac-Bfr" or "dZac-Srr" errors, ask the electric power company if it
would agree to modify the operating parameters (dZac-Max).
• Discuss changing the operating parameter with the SMA
Serviceline.
EEPROM Transition disturbance while data is being written or read from EEPROM.
The data is not relevant for safe operation
• The disturbance has no effect on the performance of the inverter.
EEPROM dBh EEPROM data is defective, the device has switched off because the loss
of data has disabled important functions of the inverter.
Corrective measures
• Contact the SMA Serviceline.
EeRestore One of the duplicate data sets in the EEPROM is defective and has been
reconstructed without loss of data.
• The error message only serves to inform you and has no effect on
the performance of the inverter.
Fac-Bfr
Fac-Srr
FacFast
The grid frequency is no longer within the permissible range ("Bfr" or "Srr"
is an internal message of no relevance for the user). For safety reasons,
the inverter disconnects itself from the grid.
Corrective measures
• If the grid frequency is within the tolerance range, yet "Fac-Bfr",
"Fac-Srr", or "FacFast" faults are being displayed often, contact the
SMA Serviceline.
Message Description and Corrective Measure
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