Troubleshooting
SMA Solar Technology AG
58
WB33-38-IA-IEN120940
Installation Manual
Derating
The "Derating" operating state is a normal operating state which may
occur occasionally and can have several causes.
Once the inverter enters the "Derating" operating state, it will display the
"Derating" warning until the next total shutdown of the device
(when there is not enough wind).
• Check the heat dissipation as described in Section 8.2 "Checking
Heat Dissipation" (page 52).
dZac-Bfr
dZac-Srr
Sudden changes in grid impedance are outside the permissible range
("Bfr" or "Srr" are internal messages of no relevance for the user).
The inverter disconnects from the electricity grid for safety reasons.
• Check grid impedance and observe how often major deviations
occur.
– If repeated frequency fluctuations occur and this is causing
"dZac-Bfr" or "dZac-Srr" disturbances, ask the network operator
to agree to a modification of the operating parameters
(dZac-Max).
– Discuss any changes to the operating parameter with the
SMA Service Line.
EEPROM
Transitional disturbance while data is being written to or read from
EEPROM. The data has no relevance to safe operation.
• This disturbance has no effect on the performance of the inverter.
EEPROM dBh
EEPROM data is defective, the inverter has switched off because the loss
of data has disabled important functions of the inverter.
• Contact the SMA Service Line.
EeRestore
One of the duplicate records in the EEPROM is defective and has been
restored without loss of data.
• This error message is only for information purposes and has no
effect on the performance of the inverter.
Fac-Bfr
Fac-Srr
FacFast
The power frequency is no longer within the permissible range
("Bfr" or "Srr" is an internal message of no relevance for the user). The
inverter disconnects from the electricity grid for safety reasons.
• If the power frequency is within the tolerance range and the faults
"Fac-Bfr", "Fac-Srr" or "FacFast" are displayed frequently, contact
the SMA Service Line.
Imax
Overcurrent on the AC side. This message is displayed when the current
on the AC grid is greater than specified.
• Check the system design and grid conditions.
Message
Description / Remedial Action
