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421

HID range error

Fronius · Symo Advanced Manual

Hva betyr 421 ?

An error has occurred related to the Human Interface Device (HID) range. This typically points to an internal communication or identification issue within the inverter's control system.

Vanlige årsaker

  • Internal communication error within the control system
  • Fault related to the device's human interface components

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  1. 1

    If this status code is displayed all the time, notify a Fronius-trained service engineer.

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Verifisert teknisk data. Sist oppdatert: March 2026

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