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cL.A1 fault error 28 in commander C300 nidec control techniques drive

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(@click2electro)
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Cause : Analog input 1 current loss comes when the cL.A1 trip indicates that a current loss was detected in current mode on Analog input 1 (Terminal 2). In 4-20 mA and 20-4 mA modes loss of input is detected if the current falls below 3 mA.

  1. Check control wiring is correct.
  2. Check control wiring is undamaged.
  3. Check the Analog Input 1 Mode (07.007).
  4. Current signal is present and greater than 3 mA.
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