SMA SB 240 - Manual (Page 55)

Event
number Event, cause and corrective measures
6402 Self diagnosis / Overtemperature (6402)
The cause must be determined by the SMA Service Line.
Corrective measures:
• Contact the SMA Service Line.
6406 DC overcurrent / Overcurrent input A (HW) (6406)
The current at the module input of the inverter is too high. The inverter has interrupted
the feed-in operation.
Corrective measures:
• Check whether the grid voltage at the connection point of the inverter is
permanently in the permissible range and/or whether voltage jumps occur (e.g.
by switching on and off large loads).
If voltage jumps occur or 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.
6415 Self diagnosis > Interference of device (6305)
The cause must be determined by the SMA Service Line.
Corrective measures:
• Contact the SMA Service Line.
11 Troubleshooting SMA Solar Technology AG
Installation Manual 55 SMA-SB240-IA-en-12