SMA SUNNY BOY 1300TL - Page 49

SMA Solar Technology AG Failure Search
Installation Guide SB13_21TL-IA-IEN121060 49
Imax / overcurrent Overcurrent on the AC side. This message is displayed if the current on
the AC grid is larger than specified.
Corrective measures
• Check the plant design and grid conditions.
K1-Close
K1-Open
K2-Open
Error during relay test.
Corrective measures
• Contact the SMA Serviceline if this fault occurs frequently or
repeatedly.
MSD-dI
MSD-Fac
MSD-Vac
MSD-Timeout
MSD-Zac
Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault continues to occur, contact the SMA Serviceline.
Offset The "Offset" operating state is a normal operating state that occurs prior
to grid monitoring. If "Offset" is displayed as an error, then there is a data
logging disturbance.
Corrective measures
• If this fault continues to occur, contact the SMA Serviceline.
Riso The electrical insulation of the PV plant 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
• Check the plant insulation.
• Check the plant for ground faults as described in section
9.3.1"Checking the PV Array for a Ground Fault" (page52).
ROM The inverter firmware is faulty.
Corrective measures
• If this fault continues to occur, contact the SMA Serviceline.
Shutdown Temporary inverter disturbance.
Corrective measures
• Contact the SMA Serviceline.
Message Description and Corrective Measure