De'Longhi EXAM440.55 “I am unable to complete your drink. Please reduce the pre-ground coffee quantity and try again”

Too much pre-ground coffee was used, or an air bubble from the water filter is blocking delivery.

Cause 1 of 2Too much pre-ground coffee. Source: Frequent and alarm messages, p. 54

First checkUse no more than 1 scoop of pre-ground coffee and press OK.

Causes and checks

  1. Too much pre-ground coffee. Source: Frequent and alarm messages, p. 54

    1. Use no more than 1 scoop of pre-ground coffee and press OK.
  2. With a water softener filter fitted, an air bubble in the circuit can block delivery. Source: Frequent and alarm messages, p. 54

    1. Press Ok and run a little hot water until the flow is steady.
    2. If it continues, remove the filter. See Install or replace the water filter.

Service

If the checks above do not clear it, contact De'Longhi Customer Services, delonghi.com/en-us/s/EXAM440.55.B. Numbers and service centres per country are listed on delonghi.com. Source: 3.2 Troubleshooting and repairs, p. 7

Other EXAM440.55 codes

Sources

  1. Instructions for use, Rivelia EXAM44X.5Y (English). De'Longhi Appliances S.r.l. Document 57132C8962, revision 03, 2026-05, 65 pages, en. library.delonghigroup.com. Listed on the manufacturer's support page. Retrieved 13 November 2026.
  2. Instructions for use, Coffee maker EXAM44X5Y, 120 V edition (English, French, Spanish). De'Longhi Appliances S.r.l. Document 57132C9620, revision 02 (file A1-57132C9620_02_0426), 2026-04, 86 pages, en-US. library.delonghigroup.com. Retrieved 13 November 2026.

Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.

Applies to
EXAM440.55 (variants EXAM440.55.B; EXAM440.55.W). United States, UK and international.
Source
Instructions for use, Rivelia EXAM44X.5Y (English), 57132C8962 revision 03, 2026-05; Instructions for use, Coffee maker EXAM44X5Y, 120 V edition (English, French, Spanish), 57132C9620 revision 02 (file A1-57132C9620_02_0426), 2026-04
Last verified
Handbook
De'Longhi Rivelia EXAM440.55 in Coffee and espresso machines; all De'Longhi handbooks