Drain Pump; Water Valve; Filters - Electrolux FMB330RGB0 Service Manual

Drain pump

The drain pump is mounted to the right side frame facing
forward. A hose from the bottom of the sump is attached
to the front of the pump. The discharge of the drain pump
has flapper check valve to prevent drain water from
backing into the tub when the dishwasher is idle. The
drain motor is a wet rotor, magnet induction, design and is
dual directional to help prevent being locked up by foreign
material entering the pump. The pump housing may be
removed for cleaning.

Water valve

The water valve is an electrically operated shut off valve.
The valve is designed for incoming water pressure from
20 to 120 psi. The valve has a built-in flow restrictor to
regulate the rate of water flow into the dishwasher. The
amount of water used in this unit will be approximately one
gallon per fill.
Overflow protection is accomplished with a pressure
switch mounted to the right side frame behind the junction
box. The pressure switch has one normally closed contact
for the water valve and one normally open contact for the
drain pump. A pressure tube from the switch loops up the
right side of the tub to the top of the water inlet assembly
then to an air chamber on the front of the sump. As the
water level in the tub rises, air trapped in the sump air
chamber applies pressure on the pressure switch which
in turn closes the contact to the drain pump draining the
tub.
Lower Spray Arm
The lower spray arm turns in a clockwise direction,
spraying up into the lower rack. The arm is attached to
the spray arm support with a locking ring. To remove, hold
the arm and turn the lock clockwise. When reinstalling the
spray arm turn the lock all the way counterclockwise until
it is fully locked in place.
Center Spray Arm
Lower Spray Arm
Center Spray Arm
The center spray arm turns counter clockwise spraying
into the upper rack. The arm has a locking nut holding it
to the delivery tube. To remove turn the lock nut clockwise
looking down from the upper rack. To reinstall told arm into
tube and turn the lock nut counterclockwise.

Filters

This dishwasher incorporates 3 filters working together to
keep food and food particals from the water being sprayed
on the dishes. The stainless steel filter is recessed into the
tub bottom and covers the complete sump. This filter is
made with a pattern of very small holes to prevent small
food partials from passing through. Water that passes
through this filter will go directly into the wash pump and
sprayed onto the dishes.
7
Sump Filter