SMA SB 240 - Manual (Page 52)

Event
number Event, cause and corrective measures
202 Grid fault / Grid undervoltage fast (202)
The utility grid has been disconnected, the AC cable is damaged or the grid voltage at
the connection point of the inverter is too low. The inverter has disconnected from the
utility grid.
Corrective measures:
1. Make sure that the circuit breaker is switched on.
2. Make sure that the AC cable is not damaged.
3. Make sure that the AC cable is correctly connected.
4. 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 approve changes to the
operating parameters of the inverter.
If the grid voltage is permanently within the permissible range and this message is
still displayed, contact the SMA Service Line.
301 Grid fault / Voltage increase protection (301)
The grid voltage or grid impedance at the connection point is too high. The inverter
has disconnected 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 approve changes to the
operating parameters of the inverter.
If the grid voltage is permanently within the permissible range and this message is
still displayed, contact the SMA Service Line.
401 Grid fault / Island grid (401)
The inverter is no longer in grid parallel operation and has stopped feed-in operation
for safety reasons.
Corrective measures:
• Check the grid connection for significant, short-term frequency fluctuations.
11 Troubleshooting SMA Solar Technology AG
Installation Manual SMA-SB240-IA-en-12 52