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Environment Error: μC2 maximum supply voltage exceeded

Beckhoff · EL2912 TwinSAFE

¿Qué significa 3 ?

When LED Diag 1 is off and LED Diag 2 flashes with code 3 (400ms ON / 400ms OFF), it indicates that the internal supply voltage for microcontroller μC2 has exceeded its maximum permissible limit. This environment error suggests an overvoltage condition, carrying a risk of damage to μC2 or other internal components due to excessive electrical input.

Causas comunes

  • External power supply providing voltage exceeding the maximum rated input for μC2.
  • Faulty voltage regulator circuit within the device.
  • Transient voltage spikes on the power input.
  • Incorrect wiring of the primary power source to the device terminals.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Measure input voltage at the power supply terminals (e.g., L1, L2) to confirm it's within specified range (e.g., 110V-230V AC).

  2. 2

    Verify device's internal DC bus voltage, if accessible, is not exceeding its design limit.

  3. 3

    Inspect power input terminals for signs of overheating or damage.

  4. 4

    Disconnect external power and allow device to discharge before re-applying power.

Ver todos los códigos en este manual (9)
Datos técnicos verificados. Última actualización: March 2026

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