SMA SUNNY BOY - Manual (Page 38)

Measurement Channels and Messages SMA Solar Technology AG
38 SB_SMC-BEN092840 User Manual
Rechner /
MSD-Timeout Functional fault in one of the two microcontrollers.
Corrective measures
• Please contact your installer or the SMA Solar Technology
Serviceline when this problem occurs several times in succession.
Relais 1
Relais 2
Relais 3
Relais 4 A grid relay is faulty. 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, please contact the SMA Solar
Technology Serviceline.
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, please contact the SMA Solar
Technology Serviceline.
REL_INV_OPEN
REL_GRID_OPEN A grid relay does not open. 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, please contact the SMA Solar
Technology Serviceline.
Message Description and corrective measure