SMA SB 1300TL Service Manual - Manual (Page 14)

Message Cause and corrective measure
Iac-DC_Offs-Srr
Iac-DC_Offs-Bfr Excessive DC current has been detected during feed-in operation.
Corrective measures:
• Ensure that the grid conditions are complied with.
• If this message is displayed frequently or recurrently, contact
the SMA Service Line.
Imax Overcurrent on the AC side. The current at the AC terminal is higher
than specified.
Corrective measures:
• Ensure that the PV system is designed correctly.
• Ensure that the grid conditions are complied with.
K1-Close
K1-Open
K2-Open Fault during relay test.
Corrective measures:
• If this disturbance occurs frequently or several times
consecutively, contact the SMA Service Line.
MSD-dI
MSD‑Fac
MSD-Vac
MSD-Timeout Internal measurement comparison fault or the hardware is defective.
Corrective measures:
• If this message is displayed frequently, contact the
SMA Service Line.
Offset Disturbance in recording measured values.
Corrective measures:
• If this message is displayed frequently, contact the
SMA Service Line.
Earthfault The electrical insulation between the PV system and ground is defec-
tive. The resistance between the positive and negative DC terminal
to ground is outside the permissible range.
Corrective measures:
• Ensure that the PV system is insulated correctly.
• Check the PV array for ground faults (see Section 4.2.2, page 16
).
ROM The inverter firmware is faulty.
Corrective measures:
• If this message is displayed frequently, contact the
SMA Service Line.
Shutdown Temporary inverter disturbance.
Corrective measures:
• Contact the SMA Service Line.
4 Troubleshooting SMA Solar Technology AG
Service Manual SB13-21TL-SG-en-11 14