Delta Mayor Manual Del Usuario página 55

For digital mode every step are the same, only step 3 is different:
End of the service:
To proceed with internal cleaning of the
group you should insert a specific
detergent in the blind filter and press at
the same time button 1 and 5.
During the cleaning, button 1 and 5 led's
will be blinking. This cycle will last 5x
25s, and to stop it you only have to
press a button.
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