SMA WB 3000-21 Installation - Manual (Page 62)

11 Troubleshooting SMA Solar Technology AG
62 WB3-5TL-21-IA-en-10 Installation Manual
401 Grid fault The inverter is no longer in grid-parallel operation.
The inverter has stopped feeding into the power
distribution grid.
Corrective measures:
• Check the grid connection for strong, short-term
frequency variations.
501 Grid fault The power frequency is not within the permissible range.
The inverter has disconnected from the power distribution
grid.
Corrective measures:
• If possible, check the power frequency and observe
how often fluctuations occur.
If there is a high number of fluctuations and this
message is displayed frequently, contact the grid
operator and ask whether they approve a change
of the operating parameters of the inverter.
If the grid operator approves, discuss any changes
to the operating parameters with the SMA Service
Line.
601 Grid fault The inverter has detected an excessively high proportion
of direct current in the line current.
Corrective measures:
• Check the grid connection for direct current.
• If this message is displayed frequently, contact the
grid operator and check whether it is possible to
raise the limiting value for monitoring on the
inverter.
Event
number Display message Cause and corrective measures