De'Longhi EXAM440.55 how to set the water hardness
At first use and whenever your water supply changes. A correct setting means descaling is requested less often.
You need
- Total hardness test strip (in the accessories pack)
Steps
- Dip the Total hardness test strip in a glass of water for about one second and shake it.
- After about a minute, count the red squares: each square is one level, from 1 to 4.
- Open the settings menu, scroll to Water hardness and press Set.
- Select the level matching the strip, press < to save, then X to return to the homepage.
Source: Using the machine for the first time: Check the hardness of the water; Menu settings: Water hardness Source: Using the machine for the first time: Check the hardness of the water; Menu settings: Water hardness, pp. 12–20
Used for
Other EXAM440.55 procedures
- How to descale the RiveliaWhen the machine shows "It’s time to descale the machine" or the descale symbol is lit. Takes about 30 minutes. Start from the message with Yes, or from Descale in the settings menu.
- How to install or replace the water filterWhen "It’s time to replace the water filter" appears or the filter symbol is lit, every 2 months, or after 3 weeks unused with a filter fitted.
- How to clean the brewing unitAt least once a month, and when "Can you insert the brewing unit?" appears.
- How to clean the milk carafe after useAfter each milk drink, when the machine prompts for the Clean function. For several drinks in a row, press Cancel at the prompt and clean after the last one.
- How to clean the milk carafe thoroughlyAfter 1 day for the LatteCrema Cool carafe and after 2 days for the LatteCrema Hot carafe; the machine reminds you.
Sources
- 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.
- 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.