Chapter 4 Fault diagnosis
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4.3 Fault lists – Brewing system
4.3.1 Overview
Incorrect grinding quantity Coffee outlet slow Malfunction (grinder(s))
Coffee too cold
Incorrect grinding degree Uneven measures in cup
Brewing unit malfunction Coffee too hot
Heating time too long No foam/ little foam
Piston motor malfunction
Over-pressure in instant
heater
Wet coffee grounds
Flowmeter malfunction
Booster malfunction