SMA SMC 4600A Installation - Manual (Page 61)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC46-60A11-IA-en-81 61
MSD-Fac Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact the SMA Service Line if this disturbance occurs frequently.
MSD-Vac Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact the SMA Service Line if this disturbance occurs frequently.
MSD-Timeout Internal measurement comparison fault or hardware defect.
Corrective measures
• Contact the SMA Service Line if this disturbance occurs frequently.
Offset 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
disturbance in the recording of measured values.
Corrective measures
• Contact the SMA Service Line if this disturbance occurs frequently.
PowerBalance The Sunny Mini Central is part of a three-phase system with two further
Sunny Mini Central inverters equipped with the SMA Power Balancer for
preventing unbalanced loads. The operating parameter "PowerBalancer"
has been set to "PhaseGuard" or "FaultGuard".
Corrective measures
• For detailed descriptions of the operation modes "PhaseGuard"
and "FaultGuard", refer to Section 5.5 "Connecting the SMA Power
Balancer" (page 34).
Riso The electrical insulation between the PV plant and earth is defective.
The electrical resistance between the DC positive and/or DC negative
terminal and earth is outside the defined limit range.
Corrective measures
• Check the insulation of the PV plant.
• Check the PV plant for earth faults as described in Section 9.3.1
"Checking the PV Array for Earth Faults" (page 64).
ROM The inverter firmware is faulty.
Corrective measures
• Contact the SMA Service Line if this disturbance occurs frequently.
Trafo-Temp-F Temperatures in the transformer have exceeded the acceptable limit. The
inverter stops feeding in until the temperature reverts to within the
acceptable range.
Corrective measures
• If this disturbance occurs frequently, check the heat dissipation.
Message Description and corrective measure