SMA Solar Technology AG
Troubleshooting
Installation Manual
WB33-38-IA-IEN120940
59
K1-Close
K1-Open
Error during relay test.
• Contact the SMA Service Line if this disturbance occurs frequently
or several times in a row.
MSD-Zac
MSD-Vac
MSD-Timeout
MSD-Zac
Internal measurement comparison fault or hardware defect.
• Contact the SMA Service Line if this disturbance occurs frequently.
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 disturbance in data logging.
• Contact the SMA Service Line if this disturbance occurs frequently.
Riso
The electrical insulation between the small wind turbine system and earth
is faulty. The resistance between the DC plus and/or DC minus
connection and earth is outside the defined limit range.
• Check the insulation of the small wind turbine system.
• Check the small wind turbine system for earth faults as described in
Section 9.3.1 "Checking the Small Wind Turbine System for Earth
Faults" (page 62).
ROM
The inverter firmware is faulty.
• Contact the SMA Service Line if this disturbance occurs frequently.
Shutdown
Temporary inverter disturbance.
• Contact the SMA Service Line.
Trafo-Temp-F
Temperatures in the transformer have exceeded the permissible limit. The
inverter stops feeding into the grid until the temperature reverts to within
the permissible range.
• If this problem recurs, check the heat dissipation of the inverter, as
described in Section 8.2 "Checking Heat Dissipation" (page 52).
Trafo-Temp-W
If the transformer reaches an unacceptably high temperature, the inverter
stops feeding energy to the grid until the temperature has reverted to
normal and the system can begin feeding into the grid again.
The "Trafo-Temp-W" warning is displayed until the device is completely
disconnected.
• Check the heat dissipation as described in Section 8.2 "Checking
Heat Dissipation" (page 52).
Message
Description / Remedial Action
