SMA SUNNY BOY - Manual (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