11 Troubleshooting
SMA Solar Technology AG
Operating manualSTP50-40-BE-en-1590
Event number Message, cause and corrective measures
7622
No communication with the I/O module?
This event is displayed during a device-internal communication error with the
SMAI/OModule. For safety reasons, the inverter disconnects from the utility
grid.
7702
Interference device
The cause must be determined by the Service.
Corrective measures:
• Contact Service.
7801
Error overvoltage protector
One or more surge arresters have tripped or one or more surge arresters are
not inserted correctly.
Corrective measures:
• Make sure that the surge arrester is inserted correctly.
• If surge arresters have tripped, replace the tripped surge arresters with
new surge arresters.
8003
Active power limited temperature
The inverter has reduced its power output for more than ten minutes due to ex-
cessive 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 +35°C has not been exceeded.
• Ensure that the inverter is not exposed to direct solar irradiation.
8101
8102
8103
8104
Communication disturbed
The cause must be determined by the Service.
Corrective measures:
• Contact Service.
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