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In order to keep a constant amount of water in the machine, if the pressure switch should re-open to
EMPTY, fresh water is introduced until the switch returns to FULL. The fill cycle is subdivided into the
following sub-cycles:
7.2.1
Static filling
With the motor switched off, the fill solenoid is activated and water is introduced into the appliance
until the pressure switch switches to FULL
7.2.2
Dynamic filling
Dynamic filling is obtained by starting the wash pump, which moves the pressure switch to the
EMPTY position. At this point, the fill solenoid is actuated and water enters until the pressure switch moves
to the FULL position.
The speed of the motor determines the quantity of water loaded into the machine: the electronic
control system actuates the wash pump at a speed that depends on the type of washing that will be
executed after the machine fills:
If washing is «ctrl» (constant speed): the motor is gradually accelerated to 2800 RPM.
If washing is «PW» (pulse): the motor is gradually accelerated to 1900 RPM.
N.B.- For more information on these washing methods, see the table of wash programmes.
7.2.3
Level control during washing
The water circuit operates with greatest efficiency when the pressure switch remains constantly on
FULL, since the water contained in the sump enables the pump motor to operate constantly and without the
fluctuations that are caused when the pump cavitates.
The fill solenoid is disabled when the pressure switch is set to FULL.
7.3 Water filling time
The maximum time that the fill solenoid stays open is subdivided over the various sub-phases in the
fill cycle.
7.3.1
Static filling time
S.T. = max 90 seconds: this is the maximum time allowed for the pressure switch to switch to
FULL. If the switch does not move to FULL within the established time, the electronic control system signals
an alarm [1 0] and interrupts the washing cycle.
7.3.2
Dynamic filling time
D.T. = S.T. x 3: this is the maximum time allowed for the pressure switch to switch to FULL during
the entire fill phase.
•
If the pressure switch does not switch to FULL within the time allowed (S.T. x 3) the electronic control
system shuts off the fill solenoid and the heating element (if it is on), and then completes the washing
cycle. When this occurs, alarm [F0] is stored internally but is not shown to the user. The alarm can only
be displayed to the service technician through a specific procedure.
•
During dynamic filling at 2800 RPM, if the pressure switch fails to switch to the FULL during the first 60
seconds, the electronic control system signals an alarm [1 0] and interrupts the washing cycle.
7.3.3
Interruption of water filling
If the fill cycle is interrupted by opening the door or by a power failure, the elapsed time up to that point is
stored. When the door is closed or power is restored, water filling resumes from the point of interruption and
the operating time from that point is added to the previous time.
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