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Fault Diagnosis
Complaint - Ice Maker Fails to Start
1.
Check to see if ice maker control arm is locked in
raised position.
2.
Check terminals from cabinet wiring to ice maker for
open circuit in wiring or components.
3.
Check operation of ice maker with test service cord.
4.
Check mold temperature at a mounting screw. If
temperature is above 15°F, freezer air temperature
is not cold enough to switch ice maker thermostat
to closed position. If mold is below 9°F, manually
start ice maker by rotating timer gear. If motor
fails to start, check motor for continuity. If motor
starts, thermostat, shut-off switch, or hold switch is
inoperative.
5.
Check hold switch first. With ejector blades in the
starting position, check terminals "C" and "NC" for
continuity. Replace switch if continuity readings
are open. Check shut-off switch linkage. Then
check terminals "NO" and "C" for continuity with
ice maker control arm in lowest position. Replace
switch if continuity readings are open. If hold switch
and shut-off switch are operative, then replace
thermostat.
Complaint-Ice Maker Fails to Complete Cycle.
1.
With ejector blades at 10 o'clock position, Hold
switch plunger depressed, Check terminals "C"
and "NO" for continuity. Replace switch if continuity
readings are open.
2.
With ejector blades at 12 o'clock position, check
shut-off switch terminals "C" and "NC" for continuity.
Replace thermostat if continuity readings are open.
3.
With ejector blades at 4 o'clock position, check
mold heater and ice maker thermostat for continuity.
Replace heater if continuity readings are open. If
heater shows continuity, replace thermostat.
4.
Check motor operation with a test cord. Replace
motor if it fails to start.
Complaint-Ice Maker Continues to Eject When
Container is Full.
1.
Check for loose linkage to the ice maker control
arm shut-off switch. Switch should open when arm is
in raised position. Adjust, if required.
2.
Check shut-off switch terminals "C" and "NO" for
continuity with ice maker control arm raised.
Replace switch if continuity readings are indicating
a closed circuit.
Ice Maker (Freezer Compartment)
Complaint-Ice Maker Fail to Stop at End of Cycle
1.
With the ejector blades in the starting position, check
the hold switch terminals"C" and "NO" for continuity.
Replace the switch if the continuity readings are
indicating a closed circuit.
Complaint-Ice Maker Produces Undersized Ice
Pieces.
1.
Ensure that ice maker mold is level.
2.
Check for partial restriction in supply line or water
valve strainer.
3.
Ensure that the water pressure to water valve is
sufficient. (30 psi min., 100 psi max.)
4.
Ensure that the water valve switch is adjusted for
proper water fill, 102 - 130 cc's.
5.
Check thermal bond between thermostat and mold.
If necessary, reapply thermal mastic sealer.
Operating Cycle Illustrations -
Manual Cycle
To manually cycle ice maker:
1.
Remove cover from ice maker head.
2.
Insert a phillips head screwdriver into screw on
timing gear.
3.
Turn gear clockwise until motor starts to run.
4-45
4-45
Figure 4-18.
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