12 Troubleshooting SMA Solar Technology AG
76 SB30-50TL-21-IA-en-21 Installation Manual
401 to
404
System
disturbance
The inverter is no longer in grid-parallel operation and has
stopped feed-in for safety reasons.
Corrective measures:
• Check the grid connection for strong, short-term frequency
variations.
If there are frequent fluctuations and this error occurs as a
result, ask your network operator if it would be
acceptable to change the operating parameters.
Discuss the proposed parameters with the
SMA Service Line.
501 System disturbance The mains frequency is not within the permissible range.
The inverter disconnects itself from the electricity grid for safety
reasons.
Corrective measures:
• If possible, check the mains frequency and observe how
often major fluctuations occur.
If there are frequent fluctuations and this error occurs as a
result, ask your network operator if it would be
acceptable to change the operating parameters.
Discuss the proposed parameters with the
SMA Service Line.
601 System
disturbance
The internal monitoring function of the inverter has detected an
excessively high proportion of direct current in the grid current.
The inverter disconnects from the electricity grid.
Corrective measures:
• Check the grid connection for direct current.
• If this event occurs often, check with the network operator
whether it is possible to raise the threshold for monitoring.
701 Frq. not permitted The mains frequency is outside the permissible range. The
inverter disconnects from the electricity grid for safety reasons.
Corrective measures:
• If possible, check the mains frequency and observe how
often major fluctuations occur.
If there are frequent fluctuations and this error occurs as a
result, ask your network operator if it would be
acceptable to change the operating parameters.
Discuss the proposed parameters with the
SMA Service Line.
Event no. Message Cause and corrective measures
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