Electrolux 5995502399, Service Manual, Page: 50 / 173

Ice Maker (Fresh Food Compartment)
4-2
The top center section contains the finger section of the
evaporator. The water will freeze around the finger
evaporator that will have a tube attached for the finger
evaporator heater to slide into. This heater is a 150 Watt
heater (See Figure 4-1). It is used to heat the fingers
of the evaporator so the ice cubes release and fall into
the ice bucket. There is also a Bi-metal limit switch
attached to the finger section of the evaporator to control
the heater. The thermostat contact set will open at 77
° F
and close at 59 ° F.
In the back section of the ice maker is the electronic
expansion valve (EEV), that will control refrigerant flow
to the ice maker evaporator.
The valve is operated by a 12V DC stepper motor
similar to the motor used to operate the damper. The
electronic control board opens the EEV to maintain the
correct refrigerant flow through the evaporator depending
on the load. A thermistor attached to the suction line of
the fin and tube section of the ice maker evaporator will
send the temperature to the control board so it can
operate the EEV.
NOTE: The EEV is supplied as part of the ice maker
evaporator.
There is pressure regulator mounted in the freezer
compartment to the left of the product evaporator. The
pressure regulator is required because the ice maker
evaporator runs at a warmer temperature than the lower
freezer evaporator. The pressure regulator is factory set
to maintain a 6 1/2 pound suction line pressure on the ice
maker evaporator. (See Figure 4-3)
NOTE: This is a non-adjustable regulator. The pressure
regulator is only used on the 55 and 70 series French
Door Bottom Freezer Refrigerators.
The rear section of the ice maker contains the icemaker
evaporator, a 35 Watt defrost heater (See Figure 4-1),
a defrost bi-metal limit thermostat with a contact set that
will open at 48
° F and close at 25 ° F.
The defrost heater will turn on at the same time as the
defrost heater for the main evaporator located in the
freezer.
There is a circulating fan motor to supply air movement to
the ice maker compartment. The fan motor for the food
compartment ice maker is a 12V DC fan motor.
The last part in the rear section is the suction line
thermistor mounted to the suction line coming from the
fin and tube section of the ice maker evaporator. The
thermistor is mounted inside foam insulating tape. and
senses the temperature of the suction line and relays this
information back to the control board. This
information is used in controlling the EEV.
NOTE: It is critical to proper operation of the EEV that
the thermistor is mounted at the bottom of suction line.
Ice maker bail arm, bail arm switch, gear box, and fill and
freeze switches are mounted in the front of the ice maker.
The bail arm drops down to check the amount of ice in
the bucket and uses the switch to prevent ice harvest
when the ice maker bucket is full. The fill and freeze
switches monitor the ice mold position under the water fill
spout and finger evaporator.
Defrost Water Drain
The defrost water from the fin and tube section of the
evaporator runs into a trough in the housing that holds
the evaporator in place in the back of the ice maker. The
outlet for the trough lines up with a drain line
running through the insulation between the cabinet and
the liner. The water then runs into the same drain pan
under the product as the defrost water from the freezer
evaporator.
Figure 4-4. Icemaker Water Drain
Figure 4-3. Pressure Regulator
Pressure Regulator
Drain
Trough
Drain Outlet
Rear Section
of Cover
Front Section
of Cover