Electrolux GOOD Service Manual page 51

armature operates within a closed metal tube (valve
guide) which is sealed by the outer edge of the
diaphragm to the valve body. A coil spring holds the
armature down against the diaphragm main orifice when
the solenoid is not energized.
The following line drawings and text explains basic valve
operation.
When the valve is in a closed position, the solenoid is not
energized. Water has bled through the diaphragm bleed
orifice placing incoming line pressure on top of the
diaphragm. The bottom of the diaphragm is essentially at
atmospheric pressure (open to the outlet) and the
pressure differential holds the valve shut.
Water Valve Closed
When the solenoid is energized, the resulting magnetic
field pulls the armature up into the valve guide.
The armature spring is compressed by this action. When
the armature moves up, it allows the water on the top of
the diaphragm to drain through the main orifice.
The diaphragm bleed orifice is much smaller than the
main orifice and will not admit enough water to maintain
pressure on the top side of the diaphragm. Thus, as the
pressure on the top of the diaphragm is reduced to
almost zero, the pressure on the bottom lifts the
diaphragm off the valve seat, allowing a full flow of water.
Solenoid Activated
When the solenoid is de-energized, the armature drops
down, closing the diaphragm main orifice. Water
continues to flow through the diaphragm bleed orifice,
equalizing the pressure and allowing the spring to push
the diaphragm down against the valve seat.
Softener
Water Solenoid Activation (Good Models)
When the TEMP switch is set to Hot/Cold, in the wash
cycle the hot solenoid is activated and the Bleach
solenoid is activated, for all except the last fill, in rinse.
For the last rinse fill, the wash and bleach solenoids are
activated. When the TEMP switch is set to Warm/Cold,
in the wash cycle, the hot and wash solenoids are
activated and the Bleach solenoid is activated, for all
except the last fill, in rinse. For the last rinse fill, the
wash and bleach solenoids are activated. When the
TEMP switch is set to Warm/Warm, in the wash cycle
the hot and wash solenoids are activated and the Bleach
solenoid is activated, for all except the last fill, in rinse.
For the last rinse fill, the hot and bleach solenoids are
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Water Valve Open and Diaphragm Up
Water Valve Closing