SMA Solar Technology AG Failure Search
Installation Guide SMC6-8TL-IEN101040 65
MSD-Vac Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline
MSD-Timeout Internal measurement comparison fault or hardware defect.
Corrective measures
• 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.
Corrective measures
• If this fault occurs often, contact the SMA Serviceline
PowerBalance The inverter is part of a three-phase system with two further inverters and
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", please refer to section
5.5”Connection of the SMA Power Balancer” (page37).
Relais2
Relais4
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, try to
rectify the fault using a communication product.
• Should this be unsuccessful, contact the SMA Serviceline
Riso The electrical insulation between the PV plant and 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 Generator for a Ground Fault” (page68).
Message Description and corrective measure
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