SMA SB 3300-11 Installation - Manual (Page 53)

SMA Solar Technology AG Troubleshooting
Installation Manual SB33-38-11-IA-en-62 53
Imax / overcurrent Overcurrent on the AC side. This message is displayed if the current in the
AC grid is higher than specified.
Corrective measures
• Check the plant design and grid conditions.
K1-Close
K1-Open Error during relay test.
Corrective measures
• If this fault frequently occurs or occurs several times consecutively,
contact the SMA Service Line.
MSD-Fac Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
MSD-Vac Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
MSD-Timeout Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
MSD-Zac Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
OFFSET The "Offset" operating state is a normal operating state that occurs prior
to grid monitoring.
If "Offset" is displayed as an error, there is a fault in the data logging.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Riso The electrical insulation between the PV plant and ground is defective.
The resistance between the DC plus and/or DC minus connection and
ground is outside the defined limit range.
Corrective measures
• Check the insulation of the PV plant.
• Check the plant for ground faults as described in section
9.3.1 "Checking the PV Array for Ground Faults" (page 56).
ROM The inverter's firmware is faulty.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Message Description and corrective measure