SMA America, LLC
9 Troubleshooting
Installation Manual
SB3-5TLUS22-IA-en-10
65
301
Grid fault
The 10-minute average line voltage is no longer
within the permissible range. The line voltage or
grid impedance at the termination point is too
high. The inverter disconnects from the power
distribution grid to comply with the power
quality.
Corrective measures:
• Check that the line voltage at the
termination point of the inverter is
permanently in the permissible range.
If the line voltage is outside the permissible
range due to local grid conditions, contact
the grid operator. Ask the grid operator
whether the voltage can be adapted at the
feed-in point or if it would be acceptable to
change the monitored operating limits.
If the line voltage is permanently in 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 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.
Event number
Display message
Cause and corrective measures
