7.2
THE PUMPING ELEMENT
The pump of the VA388 is located on the left
side of the machine. The duration of the pump
depends on the amount of daily work and the
quality of the water. The pressure at which the
machine is set by the factory is ideal for extract-
ing coffee: 9 bar.
WHEN TO REPLACE THE PUMP
t It is noisy: if the impurities enter inside the
pump, the blades of the impeller may block,
therefore making it impossible to load water.
t Pressure not adjustable: with time the
impeller blades can wear out, therefore if it is
not possible to adjust the pressure with the
appropriate wheel it would be necessary the
replacement.
t
Pressure fluctuation during dispensing:
the
bypass or the impeller are damaged.
The cover of the water draining tray must have
rubber fittings that are unused and appropriately
obstructed, and the O-ring of the lid perfectly
positioned in its seat to ensure maximum grip.
Edition 01 of 08/2017
7.4
SERVICE MANUAL
Fig. 189
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