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Modular Ice Maker Service Sheet

PARTS BREAK DOWN
TROUBLESHOOTING AND DIAGNOSTICS GUIDE

Description
1 Mold and Heater Assembly
3 Bearing and Inlet
4 Ejector
5 Ice Stripper
6 Support
7 Retainer, Thermostat (2)
8 Thermostat (also Order  Cement Alumilastic)
9 Screw, (2)10-32 x 49/64"
10 Module, Assembly
11 Motor
13 Screw, (3)
14 Shut-off Arm
15 Wiring, Harness
16 Clip, Ice Maker
17 Screw, 8-32 x 27/64"
18 Cover
19 Module Assembly (Includes Items 10,11, and 12)
20 Valve, Solenoid
21 Knob,Water
22 Bracket
23 Clip, Thermal Fuse
SERVICING

The design of this ice maker allows all of the components 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 = Ll side of line
V =Water valve connection

NOTE: Read this section completely before doing any testing or adjusting. Refer to tech sheet for complete testing information.

The test holes are identified as "N," "M," , "V," etc.
TEST PROCEDURES

Ice Maker Plugged In To Power
Shut-Off Arm Down-Freezer Cold


Test points L & N will verify 120 volts to Ice Maker module.
(Make sure your test probes go into the test points 1/2".)


Test points T & H will verify if the bimetal thermostat is open or closed.


Short T & H with an insulated piece of wire ( 14 gauge) to run the motor. If the motor doesn't run, replace the module assembly.

If you leave the jumper in for a half of a revolution, you can feel the heater in the mold heat up..if it's good.


Remove the jumper and the water valve will be energized in the last half of the revolution.

 

Only one revolution is possible with the
cover on due to a stop molded on cover.

WATER FILL ADJUSTMENT
Turning the water level adjustment screw
will move the contact in its relationship
with the contact ring segment. This
causes the contact to vary the time that the
water valve is energized, since the contact
ring is tapered at the end of the fill time.

 1 full turn will affect fill by 40cc. 1/2 turn varies the
fill by 20cc.

Some Ice Makers May have knob
Turning the knob or screw clockwise
decreases fill; counterclockwise
increases the fill amount.

If water valve adjustment screw falls out, just put it back in and align the hole in the hole as shown.


When small hole is centered in larger hole the water
fill adjustment is for 7.5 seconds fill time (normal).

WATER FILL ADJUSTMENT SCREW
1 full turn will affect fill by 40cc. 1/2 turn varies the
fill by 20cc.
Some Ice Makers May have knob
Turning the knob or screw clockwise
decreases fill; counterclockwise
increases the fill amount.
Turing Adjustment Screw More than 1 full turn could damage module.

TEMPERATURE PROBLEMS

Temperatures in the freezer section which average above the normal 0 +-5 will slow the production of ice. Complaints of inadequate crescent production may be corrected by simply setting the freezer to a colder temperature. The thermostat cycling temperature in this 1 revolution ice maker is 17 + or -3. Obviously, the ice will be well frozen when these temperatures are achieved but cycling time will be slowed if the freezer temperature is not cold enough to achieve these mold temperatures easily.

 

How to cycle the I/M

Cycle the I/M using a paper clip and a pair of INSULATED pliers (it will shock you if you touch it), Or an insulated piece of wire. Bend the paper clip or wire   into a U shape so that one end of it will fit in the "H" hole in the module and the other in the "T", insert the wire or clip, the I/M should start to go around. Wait about 2 or 3 seconds or until you here a small click, and remove the clip or wire. The I/M should continue on around. If it doesn't you may have removed the clip too soon. the ejector arms will be going around and will stop at 2 o'clock. The fill portion of this cycle is from about 12 o'clock position to 2 o'clock position. It should fill with water during this portion of the cycle.

modim3.jpg (152450 bytes)
Click image for a larger view
modim6.jpg (150656 bytes)
Click image for a larger view
modim5.jpg (154890 bytes)
PROBLEM   POSSIBLE SOLUTION

No Water In I/M Mold
Fill Tube Frozen Up

Fill Tube Frozen Up

Defrost fill tube

Check water supply valve to I/M water inlet valve, if normal 1/2" angle stop or shut off suspect water inlet valve.(#20 Above Image)

If 1/4" saddle type valve (Click for Photo) supplies water to inlet valve #20 Above Check saddle valve for mineral build up.
If saddle valve is "self piercing type" (it punctures the tubing when you install it) & is not a drill type (you must drill a 1/4" hole in pipe when you install it), replace the valve with a drill type.

Freezer temperature set too cold, set to normal temperatures

Water Filter stopped up

No Water In I/M Mold

Fill Tube Not Frozen Up

Check water inlet valve coil with ohm meter for continuity

Check Water Supply valve to I/M water inlet valve.

Check mold heater for continuity

Heater Should Ohm out at around 72 ohms, Note: it's either good or bad, i.e. it either has continuity or not.

Cycle I/M check for 110 volts to water inlet valve during momentary fill cycle via I/M module.
No 110 ?...heater or module
Yes 110 ?....water inlet valve or supply valve.

 

Ice Maker Water Inlet Valve
Check for Continuity
This Valve Gets 110 volts for 7 to 10 seconds via the Ice Maker to fill the Ice Maker with water.

IMWatervalve.jpg (30198 bytes)

Note: we do not recommend taking these valves apart and cleaning them as they usually will leak if you do this and you also take the risk of the valve sticking in the open position and flooding your house. The diaphragms in these valve swell over time and become deteriorated, not letting enough water in.

wp_im_mold.jpg (124236 bytes)
Click Image to Enlarge

Click Image to Enlarge
dual_valve_wp.jpg (134051 bytes)
Note: Sample Picture. Does not apply to all Models or brands

Note: we do not recommend taking these valves apart and cleaning them as they usually will leak if you do this and you also take the risk of the valve sticking in the open position and flooding your house. The diaphragms in these valve swell over time and become deteriorated, not letting enough water in.

Ice Maker Module
immodule3.jpg (74640 bytes)

Water in I/M but doesn't cycle.

I/M Thermostat

Wiring Harness

I/M Shut Off Arm in wrong position

IM Shut Off Arm has come out of module

I/M Module

using an ohm meter check thermostat for continuity if cold enough

Check for voltage to I/M at harness

Check Arm for proper position

Put arm back in module

If thermostat is good, cycle I/M if no cycle and all else is ok, replace module

Black Specs in Ice Cubes

Coating Coming off of mold

Replace I/M Mold #1 above (also Order   Cement Alumilastic)

I/M leaks water in freezer or bucket.

Coating on mold coming off causing unit to leak

I/M filling too long

Unit making hollow ice cubes

Replace I/M Mold #1 above (also Order   Cement Alumilastic)

Cycle I/M should give 7.5 seconds of fill, if too long replace module.

Check water supply valve to I/M water inlet valve, if normal 1/2" angle stop or shut off suspect water inlet valve.(#20 Above Image)

If 1/4" saddle type valve (Click for Photo) supplies water to inlet valve #20 Above Check saddle valve for mineral build up.
If saddle valve is "self piercing type" (it punctures the tubing when you install it) & is not a drill type (you must drill a 1/4" hole in pipe when you install it), replace the valve with a drill type.

Unit making hollow ice cubes

Poor water pressure to I/M

Check water supply valve to I/M water inlet valve, if normal 1/2" angle stop or shut off suspect water inlet valve.(#20 Above Image)

If 1/4" saddle type valve (Click for Photo) supplies water to inlet valve #20 Above Check saddle valve for mineral build up.
If saddle valve is "self piercing type" (it punctures the tubing when you install it) & is not a drill type (you must drill a 1/4" hole in pipe when you install it), replace the valve with a drill type.

Water Dispenser Not Working Check the water supply to the water inlet valve.

Check the water filter. ( if applicable)

Check the water inlet valve

Make sure the Temperatures in the Fresh  food section and the freezer sections are normal. 33 to 42 in the Fresh Food section and 0 to 10 in the freezer. Or check that the controls, both the fresh food and freezer section controls are set on the "normal" settings. If the controls are set too cold it will cause the water  tank or tubing to freeze.

Dispenser switch not  working, check for continuity

Dual Water Valve
dual_water_valve.jpg (97609 bytes)

One side of this valve does the water in the door, the other the water for the ice maker

Didn't Find Your Answer Here? Try Submitting Your Request




Saddle Type Valve

Or If You Prefer  The Service Dept.

All of the information is provided FREE OF CHARGE. No liability is assumed by
American A/C & Appliance, any of it's employees, or it's provider for the accuracy of
the contents or damages caused by the use of these procedures.

copyright 1997-2001  American A/C & Appliance Co.
No part of this website may be reproduced or copied without the prior written permission of American A/C & Appliance Co.

 
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