Hello, Gintautas -
Clarification: Are you seeking a service (repair) manual for the Delonghi Caffe Corso ESAM 2600?
I finally found an English language owner's manual online. In case you can use the owner's manual, this is the link to the PDF document (Adobe Acrobat Reader software) which you can download, save to a file in your Documents folder (giving the file a name you can find again easily), and print for easy reference:http://documents.4rgos.it/v1/static/9062135_R_D001
The user manual lists 3 Delonghi machines: ESAM 2200, ESAM 2600, and ESAM 2800.
Knowing that the user manual covered more than one model of machine, I searched more broadly for a repair manual and found one (in Italian, English, German, French, and Spanish.) It covers ESAM machines in the 2000 series as well as others. The link is through this web page:https://elektrotanya.com/delonghi_esam_series_service_info_italy.pdf/download.html
It is a PDF document, so you will need Adobe Acrobat Reader software (free.) On the web page cited above, scroll down the page until you see these words:
This file is downloadable free of charge: Get Manual
Click or tap on the Get Manual link. Chose to save the file (and give it a file name you can find again easily) or first open the file with Adobe Acrobat Reader software (you can then save the PDF file to your computer and your Documents folder) and print the manual later.