Frigidaire LGUB2642LF2, Руководство по обслуживанию

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4-1
Fresh Food Compartment Ice Maker
Flex Tray
Operation
The dispenser french door bottom freezer refrigerator
has an ice and water dispenser mounted in the left fresh
food door and an ice maker mounted in the top left
corner of the fresh food compartment. The ice maker is
controlled by the main electronic control board mounted
under the product in the left front section behind the toe
grill. This control oversees the complete operation of the
ice maker as well as operation of the rest of the product.
The ice maker compartment has its own fin-and-tube-
style evaporator to remove heat from the ice maker
compartment. (See Figure 4-2)
The heat exchanger suction line connects to the outlet
of the freezer evaporator. The cap tube from the
heat exchanger runs to the in inlet of the ice maker
compartment evaporator. There is a jumper tube from
the outlet of the ice maker compartment evaporator to
the inlet of the freezer evaporator.
The ice maker has a drive motor and gear box assembly
in the front section of the ice maker. A bail arm mounted
to the side of the gear box and the flex ice tray are
driven off the back of the gear box. There is a thermistor
mounted to the bottom of the flex tray under a foam
insulation block.
In the ‘freeze’ position, the tray is oriented horizontally,
the thermistor mounted on the bottom of the tray is
sensing the drop in tray temperature as the water
gives up its heat, and the heat is removed from the
ice maker compartment by the evaporator located in
the back of the compartment. Once the water gets to
freezing temperature, the temperature drop rate will
slow down until the water changes from a liquid to a
solid. At this point the temperature will start to drop
rapidly. Once it has dropped another 13 degrees F, the
ice maker will go into a harvest cycle. Alternately, once
the thermistor reads 11 degrees F, the ice maker will
also initiate a harvest cycle. The Drive motor will turn
the tray CCW (counter-clock-wise) and the bail arm will
start to drop. If the bucket is full, the tray will return to
the start position. If the bucket is not full, the tray will
continue to turn CCW. The back of the tray will hit a
stop on the back of the ice maker housing. The motor
will continue to drive the front of the tray twisting it and
breaking the cubes free to fall into the ice bucket. The
tray will continue to drive CCW until a tab on the drive
gear closes the switch in the gear box. The lower control
board will now reverse the motor and drive the tray CW
back to the home position, which is horizontal.
Figure 4-2. Ice Maker Refrigeration Schematic
Figure 4-1. Heater Electrical Specifications
Ice Maker
Heater Ohms Watts @ Watts @
115 v 120v
Defrost Heater 189 70 73
Heater Manufac turers ra tings
Note that there is a +5%/-10%
tolerance on wattages
Condenser
Hot
Tube
Filter Drie r
Compressor
Evaporator
Ice Maker
Cap Tube
Ice Maker
Evaporator
Freezer
Evaporator
Suction Line From Ice
Maker Evaporator To
Inlet Of Freezer Evaporator
Depending on the Engineering Digit at the end of
the model number, the product may be equipped with
a Flex Tray or a Finger Evaporator ice maker in the
fresh food compartment. Models without the dispenser
will have an aluminum mold ice maker mounted in the
freezer compartment. Select models will be equipped
with ice makers in both the fresh food and the freezer
compartments.
Note: Models with the Flex-Tray ice maker do not have
a separate ice maker control board. The ice maker is
controlled by the system main board.