SMA SUNNY MINI CENTRAL 4600A Installation Manual page 68

Troubleshooting
Message
MSD-Fac
MSD‑Vac
MSD‑Timeout
OFFSET
PowerBalance
Riso
ROM
Trafo‑Temp‑F
68 SMC46-60A-IA-IEN120471
Description and corrective measure
Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Internal measurement comparison fault or hardware defect.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
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 fault in
the data logging.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
The Sunny Mini Central is part of a three‑phase system with 2 further
Sunny Mini Central inverters equipped with the SMA Power Balancer for
preventing unbalanced loads. The operating parameter "PowerBalancer"
is set to "PhaseGuard" or "FaultGuard".
Corrective measures
• For detailed descriptions of the operation modes "PhaseGuard"
and "FaultGuard", refer to section 5.5 "Connection of the SMA
Power Balancer" (page 37).
The electrical insulation between the PV plant and ground is defective.
The resistance between the DC plus and/or DC minus connection and
ground is outside the defined limit range.
Corrective measures
• Check the insulation of the PV plant.
• Check the PV plant for ground faults as described in section
9.3.1 "Checking the PV Array for Ground Faults" (page 71).
The inverter's firmware is faulty.
Corrective measures
• If this fault occurs frequently, contact the SMA Service Line.
Temperatures in the transformer have exceeded the acceptable limit. The
inverter stops feeding the grid until the temperature lies within the
acceptable range.
Corrective measures
• If this fault occurs frequently, check the heat dissipation.
SMA Solar Technology AG
Installation Manual