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8.9 Water distributor
8.9.1
General characteristics
The water distributor is used in models with MWM electronic control systems, and performs the following
functions:
It actions the levers in the detergent dispenser in order to duct water through the various compartments
during the course of the washing cycle.
Drawing power from the main PCB, it powers the following components:
Cold water solenoid valve
Circulation pump
Drain pump
1. PCB
2. Water distributor
3. Detergent dispenser lever system
The water distributor is actioned and controlled by the electronic control system. The motor of the distributor
is powered via a triac on the main PCB.
Before the motor is switched on, all the loads are disconnected from the power supply in order to reduce
wear of the contacts.
The motor is powered only for the time necessary to move the levers from one position to the next.
During the washing programme, the distributor may perform several complete rotations in order to move to
the positions necessary for the completion of the cycle.
8.9.2
Operating principle
1. Motor
2. Gearwheel
3. Camme
4. Lever actioning arm
5. Brush contacts
6. Contact base
7. Casing
8. Cover
The motor (1), when powered, moves the camme (3) by means of the gears (2). The camme moves the arm
that moves the lever actioning arm (4).
The camme is fitted with brush contacts (5) which slide in contact with the copper tracks on the contact base
(6). The contacts close in different ways (see diagram) depending on the position of the camme.
The camme requires 15 seconds to perform one complete rotation. As the contact base is divided into 36
sections, passage from one position to the next requires about 0.4 seconds.
SOI/DT 2002-05 eb
73
599 35 23-17
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