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WARNING/ALARM 8 in danfoss VLT FCP106 drive

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(@click2electro)
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Cause : DC under voltage comes when the intermediate circuit voltage (DC link) drops below the under voltage limit or the DC-link voltage drops below the undervoltage limit, the frequency converter trips after a fixed time delay. The time delay varies with unit size.

  1. Check that the supply voltage matches the frequency converter voltage.
  2. Perform an input voltage test.
  3. Perform a soft charge circuit test.
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