SMA Solar Technology AG
11 Troubleshooting
Installation Manual
STP5-9TL-IA-en-10
73
3301 …
3303
Unstable operation
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.
3401 …
3402
DC overvoltage
Disconnect generator
Overvoltage at the DC input. The inverter may be
destroyed.
This message is additionally indicated by rapid flashing
of the backlight.
Corrective measures:
•
DISCONNECT
the inverter
IMMEDIATELY
(see Section 10).
• Check the DC voltage to ensure it is below the
maximum input voltage of the inverter. If the
DC voltage is below the maximum input voltage
of the inverter, reconnect the DC connectors to
the inverter.
• If the DC voltage is above the maximum input
voltage of the inverter, ensure that the PV array
has been correctly rated or contact the PV array
installer.
• If this message is repeated frequently, contact the
SMA Service Line.
Event
number
Display message
Cause and corrective measures
