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ACVV Regulator MKII – Motor runs noisily

November 15th, 2022 / Updated: March 28th, 2023
  1. Phase unbalanced- Check gate leads if found to be ok suspect Thyristor open circuit.
  2. Motor Fault- Check line to line voltage at motor if balance check current on each phase is also balanced. If current is unbalanced suspect a motor winding fault.