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3901/3902
Waiting for DC start conditions > Start cond. not met
SMA · Sunny Boy Solar Inverter
¿Qué significa 3901/3902 ?
The necessary feed-in conditions for the utility grid have not yet been fulfilled, preventing the inverter from starting operation. This is often related to environmental conditions or initial setup parameters.
Causas comunes
- PV array is covered by snow or otherwise shaded, reducing power output.
- Insufficient solar irradiation to meet minimum operating thresholds.
- The voltage limit for starting grid feed-in is set too high (parameter `Critical voltage to start feed-in`).
- PV array is incorrectly rated for the inverter's start-up requirements.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Ensure that the PV array is not covered by snow or otherwise shaded.
- 2
Wait for higher solar irradiation levels.
- 3
If this message is displayed frequently in the morning, increase the voltage limit for starting grid feed-in by changing the parameter `Critical voltage to start feed-in`.
- 4
If this message is displayed frequently with medium irradiation, ensure that the PV array is correctly rated for the inverter.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: SMA Sunny Boy Solar Inverter