The contactor is a relay that supplies power to
the heating elements of the machine.
Then interrupt the neutral and the three phases
and the enabling is established by the control
unit .
In fact, when the machine is turned on the water
level is checked and if the feedback is positive
the meter is enabled by the control unit.
PROBLEMS
Normally, the contactor makes a characteristic
noise when it closes the circuit, so if you can-
not hear the typical noise it is possible that the
problem is upstream (probe) or with the contac-
tor itself.
REPLACEMENT
To replace the contactor, simply remove the ele-
ment from the side and unplug all the cables with
the help of a Phillips screwdriver.
8.3 STATIC RELAYS
Both versions of the VA388 DIGIT / T3 machines
are equipped with static relays to control the
steam boiler.
The T3 version is also equipped with staic relays
to control the temperature of the coffee boilers.
The three relays of the steam heater are activated
when the pressure switch detects a pressure
lower than that set.
Each handles a different phase and the power is
delivered by the remote control switch when ena-
bled, while the on/off command is controlled by
the control unit. The upper connections are those
of the phases, the lower ones the commands of
the relay.
Edition 01 of 08/2017
8.7
SERVICE MANUAL
Fig. 274
Fig. 275
Fig. 276
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