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Waters

Scroll pump makes a loud, throaty noise - WKB17393

Article number: 17393

SYMPTOMS

  • Loud, throaty noise coming from the scroll pump
  • Vacuum is fine

ENVIRONMENT

  • Edwards XDS 35i
  • Edwards XDS 46i
  • Edwards XDS 100B

CAUSE

Loose tip dust

FIX or WORKAROUND

  1. Ballast the scroll pump by turning the knob from 0 to II.
  2. Leave for 20–30 minutes.
  3. Return the knob back to the 0 position.

ADDITIONAL INFORMATION

For instructions on ballasting the pump, see Article 7466 - How do you ballast the Edwards scroll pumps?

Ballast once a week on Monday mornings.

When running in APCI mode or with high LC flow rates (~1mL/min), put the dial in the I position.

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