Ice Maker Service - Amana 18 Cu. Ft Service

Ice Maker
Operation
When the thermostat has sensed temperature -8.3°
±1.5° C (17° ±3° F), the thermostat closes. The cur-
rent now has a path through the thermostat to the mo-
tor (see wiring diagram). The motor is linked with the
drive gear. From the module, there are copper con-
tacts that ride on copper strips on backside of drive
gear. As the drive gear rotates, these contacts will
make or break a circuit (tract) to the copper strips to
operate the ice maker.
The design of the ice maker allows all of the compo-
nents to be tested without removing the ice maker or
moving the refrigerator away from the wall to access
the water valve.
Remove the cover and you will see the test points
identified on the module.
N = Neutral side of line
M = Motor connection
H = Heater Connection
T = Thermostat connection
L = L1 side of line
V = Water valve connection
NOTE: Read this section completely before doing any
testing or adjusting.
RS120004 Rev. 0
The test holes are identified as N, M, V, etc.
V
Specifications
Mold Heater - 185 Watts, 264 Ohms
Thermostat - Close -8 ±1°C (17 ±3°F)
(Bimetal) Opens 0° ±1°C (17 ±3°F)
Water Fill - 140 cc, 7.5 Sec.
Motor Cycle - Stamped in Circuit, Plug in Connectors,
One Revolution of blades take three
minutes plug stall time on ice. (Eject
and Water Fill)
Testing Procedures
Ice maker plugged into power, shut-off arm down,
freezer cold
1. Test point L and N will verify 230 volts to Ice maker
module. Make sure test probes go into test points
1.3 cm (1/2").
2. Test points T and H will verify the bimetal thermo-
stat is open or closed
Short T and H with an insulated piece of wire to run
motor. If the motor doesn't run, replace module as-
sembly.
If the motor runs, replace the bimetal thermostat.
3. Leave the jumper in for half of a revolution, touch
the heater mold. If the mold feels warm, the heater
is working properly.
Remove jumper and the water valve will be ener-
gized in last half of revolution providing mold
heater has not failed.
(Make sure the freezer temperature is cold
enough to close the bimetal thermostat.)
!
Damage to ice maker can result if any other contacts
are shorted together other than those specified.
A - 2
N
M
H
T
L
CAUTION