SMA SUNNY BOY 5000 - Page 21

Error number Display message, cause and corrective measures
7333
Update transport failed
The update was not carried out successfully.
Corrective measures:
• Restart the update.
7337
Update BMS failed
The cause must be determined by the SMAServiceLine.
Corrective measures:
• Contact the SMAServiceLine.
7340
Update communication failed
The cause must be determined by the SMAServiceLine.
Corrective measures:
• Contact the SMAServiceLine.
7401
Varistor defective
At least one of the thermally monitored varistors is defective.
Corrective measures:
• Check the function of the varistors (see Section6, page29).
7701 to 7703
Self diagnosis > Interference of device
The cause must be determined by the SMAServiceLine.
Corrective measures:
• Contact the SMAServiceLine.
8001
Derating occurred
The inverter has reduced its power output for more than ten minutes 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.
8902
Self-diagnosis > Battery controller relay defective
The cause must be determined by the SMAServiceLine.
Corrective measures:
• Contact the SMAServiceLine.
8903
Battery controller defective > Disconnect PV array, open DC
switch
The cause must be determined by the SMAServiceLine.
Corrective measures:
• Contact the SMAServiceLine.
4 Troubleshooting
SMA Solar Technology AG
Service Manual 21SB36-50SE-SG-en-10