SMA SB 3600SE-10 Service Manual - Manual (Page 14)

Error number Display message, cause and corrective measures
301 Grid fault
The ten-minute average value of the grid voltage is no longer within the
permissible range. The grid voltage or grid impedance at the connection
point is too high. The inverter disconnects from the utility grid to comply
with the power quality.
Corrective measures:
• Check whether the grid voltage at the connection point of the
inverter is permanently in the permissible range.
If the grid voltage is outside the permissible range due to local grid
conditions, contact the grid operator. The grid operator must agree
with an adjustment of the voltage at the feed-in point or with a
change of the monitored operating limits.
If the grid voltage is permanently within the permissible range and
this message is still displayed, contact the SMA Service Line.
401 to 404 Grid fault
The inverter is no longer in grid-parallel operation. The inverter has
stopped feeding into the utility grid.
Corrective measures:
• Check the grid connection for significant, short-term frequency
fluctuations.
501 Grid fault
The power frequency is not within the permissible range. The inverter has
disconnected from the utility grid.
Corrective measures:
• If possible, check the power frequency and observe how often
fluctuations occur.
If fluctuations occur frequently and this message is displayed often,
contact the grid operator and request approval to change the
operating parameters of the inverter.
If the grid operator gives his approval, 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 grid current.
Corrective measures:
• Check the grid connection for direct current.
• If this message is displayed frequently, contact the grid operator and
check whether the monitoring threshold on the inverter can be
raised.
4 Troubleshooting SMA Solar Technology AG
Service Manual SB36-50SE-SG-en-10 14