SMA Solar Technology SUNNY BOY 3.0, Operating Manual, Page: 67 / 100

Event number Message, cause and corrective measures
3401 to 3407
DC overvoltage > Disconnect generator
Overvoltage at the DC input. This can destroy the inverter.
This message is signalized additionally by rapid flashing of the LEDs.
Corrective measures:
• Immediately disconnect the inverter from all voltage sources (see
Section 10, page 60).
• Check whether the DC voltage is below the maximum input voltage of
the inverter. If the DC voltage is below the maximum input voltage of the
inverter, reconnect the DC connectors to the inverter.
• If the DC voltage exceeds the maximum input voltage of the inverter,
ensure that the PV array has been correctly rated or contact the installer
of the PV array.
• If this message is repeated frequently, contact the Service (see
Section 15 "Contact", page 96).
3501
Insulation failure > Check generator
The inverter has detected a ground fault in the PV array.
Corrective measures:
• Check the PV system for ground faults (see Section 12.3, page 80).
3701
Resid.curr.too.high > Check generator
The inverter has detected a residual current due to temporary grounding of the
PV array.
Corrective measures:
• Check the PV system for ground faults (see Section 12.3, page 80).
3801 to 3805
DC overcurrent > Check generator
Overcurrent at the DC input. The inverter briefly interrupts feed-in operation.
Corrective measures:
• If this message is displayed frequently, ensure that the PV array has
been correctly rated and wired.
12 Troubleshooting SMA Solar Technology AG
Operating Manual 67 SB30-50-1AV-40-BE-en-10