11 Troubleshooting
SMA Solar Technology AG
Operating manual STP8-10-3AV-40-BE-en-12 79
Event number Message, cause and corrective measures
6501
6502
6509
Self-diagnosis > Overtemperature
The inverter has switched off due to excessive temperature.
Corrective measures:
• Clean the cooling fins on the rear of the enclosure and the air ducts on
the top using a soft brush.
• Ensure that the inverter has sufficient ventilation.
• Ensure that the ambient temperature does not exceed +40°.
• Ensure that the inverter is not exposed to direct solar irradiation.
6512
Minimum operating temperature not reached
The inverter will only recommence grid feed-in once the temperature has
reached at least −25°C.
6602
6603
6604
Self-diagnosis > Overload
The cause must be determined by the Service.
Corrective measures:
• Contact the service.
6801
6802
Self-diagnosis > Input A defective
Corrective measures:
• Check whether a string is connected to input A.
• Contact the service.
6901
6902
Self-diagnosis > Input B defective
Corrective measures:
• Check whether a string is connected to input B.
• Contact the service.
6701
6702
Communication disturbed
Error in the communication processor, the inverter continues feeding in, how-
ever. The cause must be determined by the Service.
Corrective measures:
• If this message is displayed frequently, contact the Service.
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