11 Troubleshooting
SMA Solar Technology AG
70
STP5-9TL-IA-en-10
Installation Manual
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 electricity 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 network
operator. Ask the network 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
Grid fault
The inverter is no longer in grid-parallel operation.
The inverter has stopped feeding into the electricity
grid.
Corrective measures:
• Check the grid connection for strong, short-term
frequency variations.
404
Grid fault
The inverter is no longer in grid-parallel operation.
The inverter has stopped feeding into the electricity
grid.
Corrective measures:
• Check the grid connection for strong, short-term
frequency variations.
Event
number
Display message
Cause and corrective measures
