Sma SUNNY BOY User Manual download pdf (Page 39)

SMA Solar Technology AG Measurement Channels and Messages

User Manual SB_SMC-BEN092840 39

Riso / Earthfault The electrical insulation of the PV system to ground is faulty. The

resistance between the DC plus and/or DC minus connection and ground

is outside the defined limit range.

Corrective measures

• Please contact your installer to check whether your system is

properly insulated or a ground fault has occurred. Further

information is to be found in the inverter installation guide.

Riso-Sense /

Earthfault-Sense

The insulation measurement has failed.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline if this problem recurs.

ROM The inverter firmware is faulty.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline if this problem recurs.

SD-DI-Wandler The inverter has detected an insulation fault on the DC side.

Corrective measures

• Please contact your installer to check whether the plant is properly

insulated or a ground fault has occurred. Further information is to

be found in the inverter installation guide.

SD-Imax The inverter has detected an overcurrent on the AC side. It disconnects

from the grid for safety reasons and then attempts to reconnect to the

grid.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline if this problem recurs.

SD-WR-Bruecke The inverter has detected a fault in the power electronics. It disconnects

from the grid and then attempts to reconnect to the grid.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline if this problem recurs.

Shutdown Temporary inverter fault.

Corrective measures

• Please contact your installer or the SMA Solar Technology

Serviceline.

Message Description and corrective measure

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Sma SUNNY BOY User Manual Page 39