SMA WINDY BOY 3300 - Page 54

Troubleshooting SMA Solar Technology AG
54 WB33_38-IEN101830 Installation Guide
MSD-Fac
MSD-Vac
MSD-Timeout
MSD-Zac
Internal measurement comparison fault or hardware defect.
• If this fault occurs often, contact the SMA Serviceline.
Offset The "Offset" operating condition is a normal operating condition that
occurs prior to grid monitoring.
If "offset" is displayed as an error, then there is a disturbance in the data
logging.
• If this fault occurs often, contact the SMA Serviceline.
Riso The electrical insulation between the small wind turbine system and
ground is faulty. The resistance between the DC plus and/or DC minus
connection and ground is outside the defined limit range.
• Check the system insulation.
• Check the system for ground faults as described in
section9.3.1”Checking the Small Wind Turbine System for a
Ground Fault” (page57).
ROM The inverter's firmware is faulty.
• If this fault occurs often, contact the SMA Serviceline.
Shutdown Temporary inverter disturbance.
• Contact the SMA Serviceline.
Trafo-Temp-F Temperatures in the transformer have exceeded the acceptable limit. The
inverter stops feeding the grid until the temperature reverts to within the
admissible range.
• If this problem recurs, check the heat dissipation of the inverter, as
described in section 8.1”Checking Heat Dissipation” (page47).
Trafo-Temp-W If the transformer reaches an unacceptably high temperature, the inverter
stops feeding-in the grid until the transformer has reached an acceptable
temperature and the system can begin feeding-in the grid again. The
"Trafo-Temp-W" warning is displayed until the device is completely
switched off.
• Check heat dissipation, as described in section 8.1”Checking
Heat Dissipation” (page47).
Message Description / Remedy