SMA SUNNY BOY US, User Manual

Page: 31 / 40

SMA America, LLC Measurement channels and messages
User Manual SB_CL_US-BUS094410 31
IGBTs The internal hardware monitoring system has detected a fault in the power
electronics.
Corrective measures
• Contact your installer or the SMA Serviceline.
MSD-FAC Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact your installer or SMA if this problem recurs.
MSD-Idif Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact your installer or SMA if this problem recurs.
MSD-VAC Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact your installer or SMA if this problem recurs.
MSD-Timeout Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact your installer or the SMA Serviceline if this problem recurs.
Offset Fault in the acquisition of measurement data.
Corrective measures
• Contact your installer or SMA if this problem recurs.
PowerBalancer The Sunny Boy is part of a three-phase system with two further Sunny Boys.
This is equipped with the SMA Power Balancer for preventing unbalanced
loads. The operating parameter "PowerBalancer" is set to "PhaseGuard" or
"FaultGuard".
Corrective measures
• For more detailed descriptions of the operation modes
„PhaseGuard“ and „FaultGuard“ refer to section 6.2 "Status
Messages" (page 25) under „Balanced“.
REL_INV_CLOSE
REL_GRID_CLOSE A grid relay does not close. The inverter checks the relays connecting it to
the grid before feeding power into the grid. If the grid relays do not function
properly, the inverter does not connect to the grid for safety reasons.
Corrective measures
• If this fault message is displayed repeatedly, it means that inverter
operation is permanently disabled. If the inverter is equipped with a
communication interface, the installer can try to rectify the fault with
the help of a communication product.
• Should this be unsuccessful, contact the SMA Serviceline.
Message Description and corrective measure