SMA SMC 7000HV Installation User Manual
Page 68
Troubleshooting
SMA Solar Technology AG
68
SMC70HV11-IA-IEN112970
Installation Manual
Derating
The "Derating" operating state is a normal operating condition which may
occur occasionally and can have several causes.
Once the inverter enters the "Derating" state, 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 8.2 "Checking Heat
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).
The inverter disconnects itself from the public grid for safety reasons.
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 distribution grid operator if he would agree to
modify the operation parameters (dZac-Max).
Discuss any changes to this operation 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.
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.
• This fault 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"/"Srr"/"Fast" is an internal message that has no meaning for the
user). The inverter disconnects itself from the public grid for safety
reasons.
Corrective measures
• Check the grid connection and contact the distribution grid
operator if necessary.
• If the power frequency is within the tolerable range, but "Fac-Bfr,"
"Fac-Srr"or "FacFast" disturbances are still displayed, contact the
SMA Serviceline.
Message
Description and corrective measure