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3.3 Control Module for Water & Auger
The control module is used for two reasons:
To shut off the 120 volt AC & 12 volt DC supply to
the door dispenser and icemaker auger when the
freezer door is opened (for safety reasons)
To shut off the 120 volt AC & 12 volt DC supply
to the door dispenser and ice maker when the
refrigerator is switched “OFF” by means of the ON/
OFF button on the upper display panel
•
•
The function of this additional module is very simple. It
has a fuse (5 amp) for incoming 120 volt AC line voltage
and a relay that switches the line voltage ON/OFF. The
relay is driven by a circuit that senses the voltage at the
node between the door switch and the interior lamp. This
relay is controlled by the wires in the P1 connector on
the interface module. These wires are hooked on the
wires coming from the power module to the lamp and
door switch. The black wire is ground (- virtual), the white
wire is 12 volt DC (+) and the yellow wire is going to the
connection point between the lamp and door switch. If the
door is opened, the yellow wire should be 12 volt DC (+)
and if the door is closed, the reading should be 0 volts
DC. If the lamp is lit or if 12 volt DC is absent, the relay
will drop out and 120 volt AC will not be supplied to the ice
maker auger or the door water dispenser.
Control module wiring diagram
Troubleshooting control module
Problem 1
The water paddle is pushed but nothing happens, the
LED light is off.
Action
1. Remove the front cover of the dispenser and check
that the paddle mechanism activates the tactile switch.
The switch can also be checked by pushing it with a n-
ger.
2. Remove the 2-pole Molex connector in the dispenser
and check the voltage. It should be slightly lower than the
battery voltage. If power is there, but still no fuction, re-
place front control unit.
3. Check the voltage on the copper tabs in the spring-
loaded connector on the hinge side of the door.
4. Check the voltage at the 2-pin connector on the back
control unit.
5. Check the system supply voltage at the 4-pin connec-
tor on the back control unit.
Problem 2
The water paddle is pushed but nothing happens, the
LED light is on.
Action
1. Check the heater connection in the dispenser. The
resistance of the heater should be 68 ohms +/- 10%.
2. Check the voltage on the water valve. If no voltage,
replace the back control unit. If still no function, replace
the front control unit.
Problem 3
The ice paddle is pushed but nothing happens, the LED
light is off.
Action
See actions for problem 1.
Problem 4
The ice paddle is pushed but nothing happens, the LED
light is on.
Action
1. Check the heater connection in the dispenser. The
resistance of the heater should be 68 ohms +/- 10%.
2. Check the 5 amp fuse in the back control unit.
3. If fuse is OK replace the back control unit. If still no
function replace front control unit.
Problem 5
The icemaker is not working
Action
1 Check the 5 amp fuse in the back control unit.
3.4 Auger
When the paddle on the door dispenser is depressed to
call for ice, a switch will be closed sending a signal to the
interface module to send AC voltage via the yellow wire.
This contact on the interface module is a bridged set of
terminals that internally send the AC voltage to the auger
motor. As the auger motor rotates, the auger pushes the
ice forward in the ice bin and down through a chute to
the door dispenser. To check the motor, disconnect the
120 volt AC supply to the interface module. Measure the
resistance between the wires on terminals (J6) and (J3)
of the interface module.
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