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8.5.2
Dynamic fill
The dynamic fill is obtained by switching on the washing pump whose rotation causes the pressure
switch to switch to EMPTY. Subsequently, the fill solenoid valve is energized and water is introduced until
the switch returns to FULL.
The speed of rotation of the motor determines the quantity of water introduced, since the electronic
control system switches on the washing pump at a rotation speed of 2600-2800 rpm.
8.5.3
Level stability control
The hydraulic circuit operates with maximum efficiency when the pressure switch signal remains
stable on FULL. In practise, the quantity of water circulating in the sump allows the motor to run without
speed fluctuations caused by cavitation.
When the pressure switch signals FULL, the fill solenoid valve switches off.
8.6 Water fill time
The opening of the solenoid valve has a pre-set overall duration, which is subdivided into the various sub-
phases of the fill:
8.6.1
Static fill time
T.S. = max 90 seconds: This is the maximum time within which the pressure switch must switch to FULL. If
the FULL signal is not received from the pressure switch within this time, the electronic control system
interrupts the washing cycle and the appliance enters alarm condition [1 0].
8.6.2
Dynamic fill time
T.D. = T.S. x 3: This is the maximum time allowed for the entire fill phase within which the pressure switch
signal must stabilize on FULL.
•
If the pressure switch signal does not stabilize on FULL within this period (T.S. x 3), the electronic
control system switches off the fill solenoid (and the heating element, if switched on), and then allows
the washing cycle to proceed until it is completed. In this situation, the alarm condition [F 0] is not
displayed to the user, but may be accessed by the Service Engineer using a specific procedure.
•
If, during a 2600 rpm dynamic fill, the pressure switch never closes on FULL during the initial 60
seconds, the electronic control system interrupts the washing cycle and the appliance enters alarm
condition [1 0].
8.6.3
Power supply interruption during water fill
If the water fill phase is interrupted by opening the door or due to a power failure, the contents of the
counters are stored in memory; when the door is re-closed or when the power supply is restored, the water
fill resumes from the point at which it was interrupted; the new counter values are added to those previously
memorized.
8.7 Level stability during washing
Once the fill phase has been completed, the cycle proceeds to the washing phase. The washing phase is
carried out using cold or heated water, and the status of the pressure switch is monitored constantly to
ensure that the hydraulic system functions correctly. Water replenishment cycles may be performed if
necessary.
If the pressure switch returns to EMPTY during the washing phase, the fill solenoid is energized for a
maximum time equivalent to T.S. x 3 (maximum allowable total fill time).
If this time is exceeded, the washing cycle is completed, but no further supplementary fills are
performed. In this situation, alarm condition [F 0] is stored in memory. This alarm code is not displayed to
the user, but can be accessed by the Service Engineer using a specific procedure.
8.8 Washing system
The appliance features the classic washing system in which the mechanical washing action is
obtained by the rotation of the washing pump which, by ducting water into the hydraulic circuit, actions the
two spray arms simultaneously.
The washing pump is actioned by an asynchronous motor with a start-up capacitor (3µF– 450VL).
The washing pump rotates in a counter-clockwise direction (seen from the impeller side).
SOI/TD 2004-11 PR
13/
26
599 36 44-44
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