Electrolux FMB330RGB0, Service Manual

Page: 5 / 27

5
To Test the Selector Switch
1. It is best to disconnect power from the dishwasher
when testing these switches.
2. Always remove one wire from the switch you are
testing to be sure you are getting an accurate
reading.
3. Check the wiring diagram to see which contact is
closed, then check the contact with an ohm meter.
Door latch
The door latch and switch assembly holds the inner door
panel tight against the tub- door seal. The door switches
mounted to the door latch make sure all operation of
the dishwasher stops if the door is opened. The primary
purpose of the door latch and switch assembly is to
increase the safety for the user and to protect their
property. The door latch has two microswitches, one
mounted to each side of the latch. For safety, both sides of
the electrical power to the dishwasher will be broken when
the door is opened.
As the door moves to the tub the latch inside the console
pushes into a strike mounted to the top of the tub which
pushes back a cam inside the latch. This cam pushes
against a spring that in turn lowers an actuator over the
two normally open microswitches, closing the switches
and starting the dishwasher. The latch and door switches
are an assembly and can’t be replaced separately.
Testing the door switches
1. Disconnect power to the unit for safety
2. When checking a switch always remove one wire
from the switch.
3. Now check the switch for continuity with the latch
closed then for no continuity with the switch open.
If door is open the door switches
are open
Actuator
Door strike
Latch in the closed position
Actuator
Cam
Detergent and Rinse Aid Dispenser
The detergent and rinse aid dispenser consists of two
dispensers combined in one housing that are controlled
with one wax motor actuator. The first time the timer
energizes the actuator, the cover over the detergent side
of the dispenser opens dispensing detergent for the main
wash cycle. The second time the actuator is energized, the
rinse aid is released in the final rinse cycle. The detergent
side of the dispenser has one cup for detergent. After
it is filled with the proper amount of detergent and the
lid is closed, the pre-wash detergent can be placed in a
recessed area molded into the outside of the cover. When
the dishwasher door is closed the pre-wash detergent
falls directly into the tub as the cycle begins. The rinse aid
section has a clear indicator to show the presence of agent
in the dispenser. There is also an adjustable hub inside
the dispenser, visible by removing the cap, to control the
amount of agent dispensed. The detergent and rinse aid
dispenser is replaced as a complete assembly. The cap for
the rinse aid dispenser is the only part available separately.