SMA Solar Technology AG
Event number
Message, cause and corrective measures
901
PE conn. missing > Check connection
The grounding conductor is not correctly connected.
Corrective measures:
• Ensure that the grounding conductor is correctly connected.
3401
3402
DC overvoltage > Disconnect generator
3404
Overvoltage at the DC input. This can destroy the inverter.
3407
This message is signalized additionally by rapid flashing of the LEDs.
3410
Corrective measures:
3411
• Immediately disconnect the inverter from all voltage sources.
3412
• Check whether the DC voltage is below the maximum input voltage of
• If the DC voltage exceeds the maximum input voltage of the inverter,
• If this message is repeated frequently, contact the Service.
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.
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.
User Manual
the inverter. If the DC voltage is below the maximum input voltage of the
inverter, reconnect the DC connectors to the inverter.
ensure that the PV array has been correctly rated or contact the installer
of the PV array.
6 Troubleshooting
STP33-62-US-41-BA-en_es-10
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