Sma SUNNY BOY User Manual download pdf (Page 34)

Measurement Channels and Messages SMA Solar Technology AG

34 SB_SMC-BEN092840 User Manual

dI-Bfr

dI-Srr

The inverter has detected a drastic change in the differential current. This

fault only occurs in transformerless inverters that have no galvanic

isolation from the grid. The integrated differential current monitoring

system plays an important part in ensuring personal safety.

A drastic change in the differential current can be caused by a sudden

grounding fault, residual current or an actual fault in the device. The

inverter disconnects from the grid.

Corrective measures

• If the message „dI-Bfr“ or „dI-Srr“ appears for no obvious reason,

please contact your installer to verify whether the plant insulation

might have a ground fault, as described in the inverter installation

guide.

dI-Mess-Srr

Fault Curr Meas

Deviation in the differential current measurement / differential current

Corrective measures

• If this fault message is displayed repeatedly, it means that inverter

operation is permanently disabled. If the inverter is equipped with

a communication interface, the installer can try to rectify the fault

with the help of a communication product.

• Should this be unsuccessful, please contact the SMA Solar

Technology Serviceline.

dI-Test Error in differential current measurement.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline if this problem recurs.

dZac-Bfr

dZac-Srr

Sudden changes in grid impedance exceed the permissible range ("Bfr"

or "Srr" are internal messages which are of no relevance for the user).

For safety reasons, the inverter disconnects itself from the grid.

Corrective measures

• Have your installer check the grid frequency and the incidence of

major fluctuations. If repeated frequency variations occur and this

is causing „dZac-Bfr“ or „dZac-Srr" errors, your installer should ask

the utility operator to agree to a modification of the operating

parameters (dZac-Max).

• The installer is responsible for changing the suggested parameters

and making the necessary arrangements with the SMA Solar

Technology Serviceline.

Message Description and corrective measure

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 47 48

Comments to this Manuals

No comments

Sma SUNNY BOY User Manual Page 34

Comments to this Manuals

Related products and manuals for Equipment Sma SUNNY BOY