SMA WINDY BOY 3300 - Page 53

SMA Solar Technology AG Troubleshooting
Installation Guide WB33_38-IEN101830 53
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 (when the
wind is insufficient).
• Check heat dissipation, as described in section 8.1”Checking
Heat Dissipation” (page47).
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.
• 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 utility operator 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 inverter has switched itself off because the
loss of data has disabled important functions of the inverter.
• 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.
• 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.
Imax Overcurrent on the AC side. This indicator is displayed when the current
at the AC grid is greater than specified.
• Check the system design and grid conditions.
K1-Close
K1-Open
Fault during relay test.
• Contact the SMA Serviceline if this problem occurs often or several
times in succession.
Message Description / Remedy