Failure Search SMA Solar Technology AG
64 SMC6-8TL-IEN101040 Installation Guide
Fault Curr Meas
Fault Curr Meas-Srr
Deviation in the differential current measurement / differential current
If this fault message is displayed repeatedly, it means that inverter
operation is permanently disabled.
Corrective measures
• Contact the SMA Serviceline
HW-Signal Internal measurement fault or hardware defect.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline
Iac-DC_Offs-Srr A grid disturbance has occurred.
Corrective measures
• Check the grid conditions.
• Contact the SMA Serviceline if this problem occurs often or several
times in succession.
IGBTs The internal hardware monitoring system has detected a fault in the
power electronics.
Corrective measures
• Contact the SMA Serviceline
L<->N L and N are swapped on the AC connection.
Corrective measures
• Check the grid connection.
L-Netz
L-WR
N-Netz
N-WR
A grid relay is faulty. The inverter checks the relays connecting it to the
grid before feeding power into the grid. If the grid relays do not function
properly, the inverter does not connect to the grid for safety reasons.
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, try to
rectify the fault using a communication product.
• Should this be unsuccessful, contact the SMA Serviceline
MSD-dI Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline
MSD-Fac Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline
Message Description and corrective measure
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