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The door lock assembly is made up of a coil, door switch,
switch actuator, locking fork, wax motor, auxiliary switch
and spin lock arm.
Locking
Switch
Fork
Actuator
Contact
When a cycle is selected and the start pad is touched,
the control board applies power to the coil. The magnet
field of the coil pulls the locking fork down and tries to
pull the contacts of the door lock switch closed. If the
washer door is open, a tab on the switch actuator prevents
the contacts from closing and the locking fork will not
allow the door to be closed until the stop pad is touched,
removing current from the coil. When the washer door is
closed, the door strike pivots the switch actuator out of
the way allowing the magnetic field of the coil to close
the contacts of the door lock switch and the locking fork
locks the door. The wax motor and spin lock arm are
used to prevent the door from being opened while the
spin basket is still spinning. Power is applied to the
wax motor when the washer is in spin. When power is
applied to the wax motor, it expands its piston within 30
to 40 seconds driving the spin lock arm between the
locking fork and the switch actuator holding the locking
fork down. At the same time, the piston closes the door
lock auxiliary switch allowing the washer to go into spin.
When power is removed from the wax motor, it takes
about 90 seconds for the wax motor to cool down and
retract the piston, pulling the spin lock arm back away
from the locking fork and auxiliary switch . This provides
enough time for the spin basket to slow its rotation down
to the wash speed before the door could possibly be
opened.
Spin
Lock
Arm
Auxiliary
Contacts
Coil
Wax Motor
51
Pressure Switch (Select models)
The pressure switch is mounted to the right side panel
under the top of the washer and controls the water level
in the washer.
The pressure switch is made up of a single pole double
throw switch, but only contacts 1 and 2 are used. The
contacts are controlled by a bellow inside a sealed
chamber. The chamber is connected by a hose to the
air bell located at the bottom of the washer attached to
the drain boot. L 1 is applied to the pressure switch, by
the control. If the water level is below 1/2 inch from the
bottom of the spin basket, contacts 1 to 2 of the pressure
switch close applying power to one side of the (3)
solenoids of the water valve assembly. The other side of
the solenoids is connected to neutral by a relay contacts
on the control board. When the cycle calls for water,
depending on the water temperature selected and the
increment of the cycle, the control board connects one
or two of three the solenoid coils to neutral activating the
water valve solenoids. When the corrected water level is
reached contacts 1 and 2 open, signaling the control to
remove neutral from the solenoids.
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