SMA SB 240 - Manual (Page 56)

Event
number Event, cause and corrective measures
6450 Self diagnosis / Energy transfer not possible / Interference device (6450)
The inverter cannot feed into the utility grid. Possible causes: grid voltage is too high; a
PV module is defective, soiled or shaded; a cloudy or foggy day.
Corrective measures:
1. 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.
2. Check whether the DC voltage is stable in a realistic range in accordance with
the datasheet of the PV module and the assessment of the weather situation.
Therefore, determine the voltage during inverter operation using a communication
product.
3. Check whether the respective PV module is heavily soiled or shaded.
Clean the PV module if soiled.
4. During a very cloudy or foggy day, wait for higher irradiation.
5. If none of the described causes is applicable and the message is still displayed,
contact the SMA Service Line.
10265 PLC communication impaired (10265)
The cause must be determined by the SMA Service Line.
Corrective measures:
1. If several Sunny Multigate devices are installed in a system, check whether the
AC cables from the inverters to the Sunny Multigate devices have been laid in
separate channels. If the AC cables are not laid separately from each other, lay
the AC cables from the inverter to the Sunny Multigate in separate locations.
2. If the problem persists, contact the SMA Service Line.
11 Troubleshooting SMA Solar Technology AG
Installation Manual SMA-SB240-IA-en-12 56