34
Mechanical and electrical design
59
1159
Drain valve
Description
The drain valve is steered using the pressure in
the cold water intake. A hose (1) is connected
between the cold water intake and a solenoid
valve (2). When the solenoid valve is activated, it
opens and allows water to flow into the feeder
hose (3). The water presses up a piston (4),
which uses the pressure lid (5) to close the drain
valve rubber membrane. (6) When the solenoid
valve cuts out, the water pressure the lid push
the piston back, allowing the water to pass the
solenoid valve and drain out via the return hose
(7).
Trouble shooting
If the drain valve doesn’t close:
• Check that the solenoid valve (2) receives
electricity. The drain operation can be
checked using the washing machine’s built-in
service program (see section titled ”Service
Program”).
• Check that the solenoid valve and the hoses
are clear by:
- removing the drain hose (3).
- activate the machine’s service program
(see section titled ”Service Program”) and
change the program to allow direct control
over the drain valve.
- check that water exits the hose when the
valve is activated.
• Check that the diaphragm (8) is undamaged.
If the drain valve doesn’t open:
• Check that the return hose (7) is open.
• Check that the piston (4) doesn’t seize.
Fig.
59
1
2
3
7
6
5
4
8
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