11 Troubleshooting
SMA Solar Technology AG
Operating manual
STP3-6-3AV-40-BE-en-13
77
Event number
Message, cause and corrective measures
3301
3302
3303
Unstable operation
There is not enough power at the DC input of the inverter for stable operation.
The inverter cannot connect to the utility grid.
Corrective measures:
• Ensure that the PV array is designed correctly.
• Ensure that the PV array is not covered by snow or otherwise shaded.
• Ensure that the PV array is free of errors.
3401
3402
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.
• 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.
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
Residual current 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.
Summary of Contents for STP3.0-3AV-40
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