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Pre-charge

Pre-charge Alarm

Yaskawa · iQpump Simplex Pump Drive

¿Qué significa Pre-charge ?

The iQpump operator display indicates a 'Pre-charge' alarm when the pre-charge function is active. This function runs the pump at a fixed frequency (P4-02) until one of the following conditions is met: the feedback signal rises above P4-01, the pre-charge timer P4-03 expires, or the low water digital input (H1-XX = 85) is deactivated. This function is only active in the stopped mode.

Causas comunes

  • The pre-charge function is enabled by setting P4-03 (Pre-Charge Time) to a value greater than 0.
  • The system is currently in the process of pre-charging the pump or system according to configured parameters.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Confirm the pre-charge function is intentionally activated by checking if parameter P4-03 (Pre-Charge Time) is set to a value greater than 0.

  2. 2

    Monitor the feedback signal to ensure it is rising towards or has exceeded the P4-01 (Pre-Charge Level) to indicate completion.

  3. 3

    Verify the pre-charge time set in P4-03 is sufficient for the system to reach the programmed pre-charge level.

  4. 4

    If a low water digital input is used (H1-XX = 85), verify its state and ensure it will deactivate upon sufficient water presence.

Ver todos los códigos en este manual (7)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Yaskawa iQpump Simplex Pump Drive