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GE Appliances & Lighting
Technical Service Guide
March 2010
Monogram
Under-the-Counter
Icemaker
ZDIS150WSS
ZDIS150WBB
ZDIS150WWW
31-9196
GE Appliances
General Electric Company
Louisville, Kentucky 40225
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IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by
individuals possessing adequate backgrounds of air conditioning
and heat pump experience. Any attempt to repair an air conditioning
or heat pump system may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
WARNING
To avoid personal injury, disconnect power before servicing air conditioning
or heat pump systems. If electrical power is required for diagnosis or test
purposes, disconnect the power immediately after performing the
necessary checks.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers used to
complete a path to ground are removed for service, they must be
returned to their original position and properly fastened.
GE Appliances & Lighting
Technical Service Guide
Copyright © 2010
All rights reserved. This service guide may not be reproduced in whole or in part
in any form without written permission from the General Electric Company.
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Table of Contents
Bin Light Bulb .....................................................................................................................................................................18
Bin Thermistor ....................................................................................................................................................................19
Care and Cleaning .........................................................................................................................................................13
Component Locator ........................................................................................................................................................16
Components ........................................................................................................................................................................18
Component Testing..........................................................................................................................................................32
Compressor .........................................................................................................................................................................27
Condenser ............................................................................................................................................................................29
Condenser Fan Motor .....................................................................................................................................................24
Control Board Diagnostics............................................................................................................................................35
Control Features ................................................................................................................................................................12
Cutter Grid ............................................................................................................................................................................19
Door and Gasket ...............................................................................................................................................................18
Electronic Control Housing Components ..............................................................................................................21
Evaporator ...........................................................................................................................................................................29
Evaporator Thermistor ...................................................................................................................................................20
Features and Benefits.....................................................................................................................................................5
Hot Gas Solenoid...............................................................................................................................................................26
Hot Gas Valve .....................................................................................................................................................................27
Measured Fill Water Valve ............................................................................................................................................26
Nomenclature ....................................................................................................................................................................4
Reservoir Drain Pump .....................................................................................................................................................24
Schematics and Strip Circuits .....................................................................................................................................42
Sealed System ...................................................................................................................................................................27
Service Test Mode (Diagnostic Mode) ...................................................................................................................40
Specifications .....................................................................................................................................................................5
Theory of Operation ........................................................................................................................................................6
Troubleshooting ................................................................................................................................................................37
Warranty ..............................................................................................................................................................................44
Water Distributor ..............................................................................................................................................................20
Water Level Sensor ..........................................................................................................................................................23
Water Recirculation Pump ...........................................................................................................................................22
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Nomenclature
Model Number
Z D I S 150 W S S
Monogram
SS - Stainless Steel
BB - Black
WW - White
Ice Machine
Model Year - 2009
Built-In
Stainless
Capacity - 50 lbs
Serial Number
The first two characters of the serial number
identify the month and year of manufacture.
Example:
AT123456S = January, 2010
Nomenclature Tag
The nomenclature tag is located on the right
side of the ice bin. This tag contains important
information such as:
• Model/serial number
• Refrigerant charge
• Voltage rating
A - JAN
D - FEB
F - MAR
G - APR
H - MAY
L - JUN
M - JUL
R - AUG
S - SEP
T - OCT
V - NOV
Z - DEC
Note: The Mini-Manual is located behind the
front cover panel. It is folded and tucked into
one of the loops of the condenser coil.
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2010 - T
2009 - S
2008 - R
2007 - M
2006 - L
2005 - H
2004 - G
2003 - F
2002 - D
2001 - A
2000 - Z
1999 - V
The letter designating
the year repeats every
12 years.
Example:
T - 1986
T - 1998
T - 2010
Specifications
AC Power Supply . . . . . . . . . . . . . . . . . . . 97 to 127 VAC (rated 115 VAC), 60 Hz
Amperage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 Amps (max)
Minimum Circuit Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Amps
Ice Shape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 in. x 3/4 in. Square
Ice Thickness @ Normal Setting (Approximate) . . . . . . . . . . . . . . 0.32 in. (8.1 mm)
Ice Thickness @ Thin Setting (Approximate) . . . . . . . . . . . . . . . . . 0.28 in. (7.1 mm)
Ice Thickness @ Thick Setting (Approximate) . . . . . . . . . . . . . . . . .0.3915 In. (9.9 mm)
15 In. Storage Capacity (Approximate). . . . . . . . . . . . . . . . . . . . 25 lbs (11.3 kg)
Exterior Dimensions (W x D x H). . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 or 18 in. x 24 in. x 34 in.
(381 or 457.2 x 609.6 x 863.6 mm)
Exterior Finish . . . . . . . . . . . . . . . . . . . . . . . . . . Stainless Steel or Painted Steel
Net Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 in. = 94 lbs (42.6 kg)
Cube Thickness Control . . . . . . . . . Water Level Sensor & Control Board Setting
Harvest Control . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermistor under Evaporator
Bin Ice Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . Thermistor on Side of Bin
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R134a
Ambient Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 100°F
Water Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 to 120 psig
Water Consumption (Dependent on Water Pressure) 6 to 10 gallons per 4 hours
Features and Benefits
Daily Ice Production at Ambient Temperatures
Ambient Temperature
70°F (21°C)
80°F (27°C)
90°F (32°C)
100°F (38°C)
110°F (43°C)
Water Temperature
60°F (15°C)
46 lbs (21 kg)
47 lbs (21 kg)
40 lbs (18 kg)
40 lbs (18 kg)
38 lbs (17 kg)
•
•
Hidden Electronic Controls allow for a fully
integrated look.
Clean Sensor with LED Indicator
•
Lighted Bin with Ice Scoop
•
Reversible Door
•
Daily Ice Production up to 50 lbs
•
Water Level Sensor
•
Electronic, LED Controls
•
Drop-Down Door
•
Clean Light
•
Automatic Shut-Off
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Theory of Operation
Operating Systems
Electrical System
There are 3 operating systems in the icemaker:
• Electrical System
• Refrigeration System
• Water System
The icemaker’s electrical system provides power for
the refrigeration and water systems and controls
the operation of each component.
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1. The hot gas valve allows high pressure
refrigerant gas to bypass the condenser and
flow through the condenser accumulator tube.
Refrigeration System
The refrigeration system is very similar to the
system used in other refrigeration appliances. The
refrigerant used in this unit is R134a.
2. Hot gas pushes liquid refrigerant through
the condenser accumulator tube into
the evaporator, helping to evenly heat the
evaporator plate so that the ice slab releases
quickly and evenly.
There are 2 very important additions to the
refrigeration system in this Icemaker: the hot gas
valve and the condenser accumulator tube.
Evaporator
Accumulator
Capillary Tube
Hot Gas
Valve
Condenser
Accumulating
Tube
Heat Exchanger
Path of warm liquid refrigerant pushed by high-pressure refrigerant gas
Suction
Tube
Condenser
High-Pressure
Refrigerant Gas
Compressor
Warm Liquid
Refrigerant
Low-Pressure
Refrigerant Gas
Drier
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Water System
solution is circulated to clean the system of minerals
and contaminates.
The water system provides:
• Fresh water for ice production
• Water recirculation as ice is produced
• Water removal after ice is produced
The hardness of the water supplied to the icemaker
will affect the quality of the ice that is produced. It
may also affect the operation of the water system.
The water system circulates water on the
evaporator to freeze into ice during the freeze cycle.
During the harvest cycle, it drains away minerals
and contaminates. During the clean cycle, cleaning
A water softener, or poly-phosphate feeder, will not
cure all of the problems associated with hard water,
but they can be used to reduce scale buildup in the
icemaker.
Water System Component Locations
Water Distributor
Evaporator
Water Level Sensor
Water Return Tube
Water Recirculation Pump
Reservoir Pan
Manual Drain
Reservoir Drain Pan
Drain Overflow
Bin Drain
Water Valve Outlet Tube
Measured Fill
Water Inlet Valve
From Water Supply
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Operational Modes
During the later stages of the freeze mode, an ice
slab forms on the evaporator freezing plate. This
ice slab causes some of the refrigerant passing
through the evaporator to not evaporate into a
gas, but remain a liquid. This liquid refrigerant
settles in the accumulator. The refrigerant vapor is
sucked off through the suction tube at the top of the
accumulator.
There are 4 main operational modes for the
icemaker:
1.
2.
3.
4.
Ice-making cycle (Freeze Mode)
Harvest
Clean
Service (Diagnostics)
This accumulated liquid refrigerant will eventually
be directed to the evaporator to quickly warm the
evaporator plate during the harvest mode.
Ice-Making Cycle (Freeze Mode)
There are 3 possible “Off” cycles for the icemaker.
They occur when:
Caution: It is very important that the accumulator
is not tilted out of a horizontal position. If moved, it
could cause compressor failure.
1. The bin is full of ice and the ON LED is
illuminated (Idle Mode).
2. The OFF control pad has been held for 3 sec.
(The ON LED will go out.)
3. The power is interrupted by overfill. (Model ZPK1
only with internal drain pump.)
Electrical System: Line voltage is supplied to
the electrical control switches and the primary
side of the step-down dual transformer. The dual
transformer reduces 120 VAC to 8.75 VAC for the
cutter grid and the bin light, and 12 VAC for the
drain and recirculating pumps.
Water System: The water recirculation pump
moves the water from the reservoir pan up to the
distributor. The water flows out over the evaporator
freezing plate. Water that does not freeze on the
evaporator plate runs off the front edge. It falls back
into the reservoir, where it is recirculated back to the
water distributor.
As the ice slab forms, the minerals in the water are
on the surface of the ice. The water flowing over
the top of the ice slab washes these minerals back
into the water reservoir pan. The water continues to
recirculate until the water level in the reservoir drops
below a level determined by the water level sensor.
At this point, the control terminates the freeze mode
and initiates the harvest mode.
The electronic control board directs 12 VAC to the
water recirculating and reservoir drain pumps, and
120 VAC to the hot gas solenoid, condenser fan
motor, and compressor.
The measured fill water inlet valve will always
have 120 VAC on the black and white wires and
14 VDC on the orange/white and black/red wires.
An evaporator thermistor supplies temperature
information to the electronic control to determine
when to terminate the harvest cycle. A water level
sensor initiates the next harvest.
Refrigeration System: The hot gas refrigerant,
under high pressure, is forced through the
condenser, where it changes into a liquid and
flows through the drier and capillary tube into the
evaporator. Under low pressure in the evaporator,
the liquid refrigerant absorbs heat from the
water flowing over the evaporator and the liquid
refrigerant changes to gas. As a low-pressure gas,
the refrigerant flows back through the suction line of
the heat exchanger to the compressor.
During the freeze mode, some of the hot gas that is
in the condenser accumulating tube condenses to a
liquid and remains in the accumulating tube.
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Harvest Mode
Electrical System: When the water level in the
reservoir drops below the water level sensor, it
signals the electronic control to terminate power to
the condenser fan, and then the water recirculating
pump. The reservoir drain pump is activated (on for
20 sec., off 20 sec., back on for 20 sec.), to fully drain
the reservoir. Power is then supplied to the hot gas
valve and a fill request is sent to the measured fill
water inlet valve. The fill valve fills to the requested
volume while the hot gas valve is energized for
the balance of the harvest mode. If the evaporator
thermistor is unplugged, the evaporator defaults to
a timed 4-minute harvest.
If the water level sensor is disconnected or open, the
control defaults to 25 minutes of freeze time. The
cleaning indicator LED feature will not function if the
water level sensor is disconnected.
Refrigeration System: The hot gas valve opens,
allowing high-pressure refrigerant gas to bypass
the condenser, and flow through the condenser
accumulating tube. The hot gas pushes the
liquid refrigerant that has accumulated in the
accumulator tube up into the evaporator. The hot
liquid refrigerant evenly heats the evaporator plate
so that the ice slab releases quickly and evenly.
Water System: The reservoir drain pump is
activated (on for 20 sec., off 20 sec., back on for 20
sec.) to fully drain the reservoir. When fully drained,
the electronic control board sends a signal to the
water valve. The signal tells the measured fill water
inlet valve how much water is to be filled, allowing
water to flow into the water reservoir pan. The water
fill volume is determined by the ice thickness setting.
Thin Ice uses 32oz (954cc), Normal Ice uses 37oz
(1106cc) and Thick Ice uses 42.5oz (1258cc).
Note: Two minute maximum fill. The cycling
between freeze and harvest continues until the ice
bin is full. The electronic control board operates the
various components and systems in the icemaker
for each of the freeze and harvest modes.
Clean Mode (CLEAN LED on Amber, then Red)
The CLEAN LED turns from green to amber, then to
red. The CLEAN LED will turn from green to amber
after 50 hung slabs* or 3500 freeze cycles. The
CLEAN LED will then turn to red after 70 hung slabs*
or 4000 freeze cycles.
With the CLEAN LED on red and steady, the unit
must be cleaned to turn it off. When the clean cycle
is complete (approximately 70 minutes), the CLEAN
LED will be green and the OFF LED will be red.
Select and hold the OFF pad for 3 seconds to turn
the unit off. Then press the ON pad to turn the unit
on. Customer instructions for Clean Cycle are on the
inside of the door.
The ice slab, when released, slides off of the
evaporator plate onto the cutter grid.
As a result of the hot gas flow and the ice sliding off
the evaporator plate, the evaporator temperature
begins to rise. When the evaporator thermistor
reaches the set temperature (52°F), the unit switches
to the Freeze Mode.
*Hung Slab: If the time between the start of a freeze cycle
and the start of the harvest cycle is less than five minutes, the
control will count a hung slab.
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Electrical System: The electronic control board
operates the various components and systems
during the clean mode. The clean mode may only
be selected while the icemaker is turned off (OFF
button held 3 sec.) at the user interface.
When the clean mode begins, the clean light flashes
1 sec. on then 1 sec. off. The circulation pump,
compressor, and hot gas valve are energized for
40 min.
The measured fill water inlet valve is energized
for 3 minutes, and then the recirculation pump is
energized for 3 minutes. This process is repeated 5
times for a total of 30 minutes.
The electrical control board turns all components
off. The CLEAN LED remains on with reservoir full.
Refrigeration System: The compressor and hot
gas valve operate to heat the evaporator. The
evaporator thermistor will cycle the compressor off
at 125°F and on at 95°F.
Water System: When the icemaker is in the CLEAN
mode, the water recirculating pump circulates
the cleaning solution that has been added to the
reservoir up to the water distributor, across the
evaporator, and back into the reservoir, where it is
recirculated.
Note: Do not continue with the diagnosis of the ice
maker if a fuse is blown, a circuit breaker is tripped,
or if there is less than a 120-Volt power supply at
the wall outlet. All units that have failed during the
first few days of use should be checked for loose
connections or miswiring.
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Control Features
User Controls
1. To start the normal ice making cycle, select ON.
2. When the desired thickness is reached, the ice
sheet is released and slides onto a cutter grid.
The grid divides the sheet into individual cubes.
2. To stop icemaker operation, press and hold OFF.
Note: The CLEAN setting is used whenever solutions
are circulated through the icemaker for cleaning.
How the Icemaker Works
3. The water containing the rejected minerals is
drained after each freezing cycle.
When you first start your icemaker, the water
reservoir will fill and the system will rinse itself
before starting to make ice. The rinsing process
takes about 5 min.
4. Fresh water enters the machine for the next icemaking cycle.
Under normal operating conditions, the icemaker
will cycle on and off as needed. The ice level sensor
located in the ice storage bin will monitor the ice
levels.
Notes:
•
If the water supply to the icemaker is turned off,
be sure to set the icemaker control to OFF. Drain
the water reservoir and leave the icemaker door
open to allow it to dry completely.
•
The icemaker is designed to make clear ice from
the majority of water sources on a daily basis. If
your results are unsatisfactory, your water may
need to be filtered or treated.
5. Cubes fall into the storage bin. When the bin
is full, the icemaker shuts off automatically
and restarts when more ice is needed. The ice
bin is not refrigerated and some melting will
occur. The amount of melting varies with room
temperature.
Making Ice
1. Water is constantly circulated over a freezing
plate. As the water freezes into ice, the minerals
in the water are rejected. This produces a clear
sheet of ice with a low mineral content.
Note: As the room and water temperatures vary,
so will the amount of ice produced and stored. This
means that higher operating temperatures result in
reduced ice production.
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Care and Cleaning
Caring for the Icemaker
1. Press and hold the OFF button for 3 seconds.
The CLEAN light signal will illuminate yellow when
the electronic control senses that the need for
cleaning is approaching. At this time you need to
purchase nickel-safe ice machine cleaner by
Nu-Calgon, available at most appliance repair shops
or through GE Parts and Accessories. Order part
number WX08X42870. In the U.S.A., call 1-800-6262002 or visit Monogram.com. In Canada call 1-800561-3344. The CLEAN light will eventually turn
red which means the icemaker must be cleaned,
otherwise ice production will decrease significantly
or stop altogether.
IMPORTANT: For best results, use the entire contents
of the bottle to clean the unit. (See Icemaker System.)
The air-cooled condenser needs to be cleaned
regularly for efficient ice production and energy
conservation.(See Cleaning the Condenser.)
Exterior surfaces
Door handles and trim―Clean with a cloth
dampened with soapy water. Dry with a soft cloth.
Keep the outside clean. Wipe with a clean cloth
lightly dampened with mild liquid dish detergent.
Dry with a clean, soft cloth. Do not wipe the
icemaker with a soiled dish cloth or wet towel. These
may leave a residue that can damage the finish.
Do not use scouring pads, powdered cleaners,
bleach or cleaners containing bleach because these
products can scratch and damage the finish.
Stainless steel―Regularly clean and polish the
stainless steel door panels and handles (on some
models) with a commercially available stainless
steel cleaner such as Stainless Steel Magic™
to preserve and protect the fine finish. Stainless
Steel Magic is available through GE Parts and
Accessories, 800.626.2002, or monogram.com.
Order part number WX10X15. Do not use appliance
wax or polish on the stainless steel.
Icemaker System
Note: To remove stubborn buildup, pour a small
amount of cleaning solution on a non-scratching,
blue Scotch-Brite™ pad. Using only front-to-back
motions, clean the top of the plate, the sidewalls,
and the front edge of the evaporator. The frontto-back motion is important to avoid scratches
that could keep the ice slab from sliding off the
evaporator plate.
2. Wait 5 to 10 minutes for the ice to fall into the
storage bin. Remove all ice from the storage bin.
3. Unscrew the drain cap from the bottom of the
water reservoir located inside the storage bin as
shown. Allow the water to drain completely.
Drain cap
4. Replace the drain cap.
5. For best results, use the entire 16 oz. bottle of
nickel-safe ice machine cleaner. Follow all
safety precautions on the bottle. Pour one bottle
of solution into the water reservoir. Fill the bottle
twice with tap water and pour it into the water
reservoir.
6. Press and hold the CLEAN button for 3 sec. The
CLEAN light will begin to blink, indicating that
the cleaning cycle is in process. The cleaning
time is approximately 70 min.
7. When the indicator light becomes solid and
remains lit, the cleaning cycle is complete.
During the cleaning cycle, the system will both
clean and rinse itself.
8. After the cleaning cycle is complete, remove
the drain cap from the water reservoir to see
if any cleaning solution, green in color, is left in
the water reservoir. If cleaning solution drains
from the water reservoir, you should run the
clean cycle again adding only tap water to
the reservoir. Be sure to replace the drain cap
before running the cycle again. If the cap is not
securely tightened, water can leak, causing thin
ice or no ice.
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Water reservoir
(Continued next page)
Note: Severe scale buildup may require repeated
cleaning with a fresh quantity of cleaning solution.
Reverse-Osmosis System
9. Press the ON button for 3 sec. to resume ice
production.
Cleaning the Condenser
For best performance, brush or vacuum lint and dirt
from the condenser at least once a year. A dirty or
clogged condenser:
•
Uses more energy.
•
Prevents proper airflow.
•
Reduces ice-making capacity.
•
Causes higher-than-recommended operating
temperatures, which may lead to component
failure.
1. Unplug the icemaker or disconnect power.
2. Remove the 2 screws in the lower access panel
and the 2 screws from the base grille area of the
front panel support. Pull forward to remove the
lower access panel.
IMPORTANT: The performance of the icemaker may
be affected when connected to a reverse-osmosis
system. An RO system may also reduce water
pressure and affect the fill cycle, which is dependent
on time and flow. The reduced water pressure may
cause the reservoir not to fill and flush properly
during the ice-making cycle. The pressure of the
water supply coming out of a reverse-osmosis
system going to the measured fill water inlet valve
of the icemaker needs to be between 30 and 120 psi.
If a reverse-osmosis water filtration system is
connected to your cold water supply, the water
pressure to the reverse-osmosis system needs
to be a minimum of 40 psi. The reverse-osmosis
system must provide 1 gal. of water per hour to the
icemaker for proper icemaker operation.
Note: Do not use copper tubing when the icemaker
is connected to a reverse-osmosis water system.
3. Pull the bottom forward and then pull down to
remove the lower access panel.
4. Remove dirt and lint from the condenser
fins and the unit compartment with a brush
attachment attached to a vacuum cleaner.
5. Replace the lower access panel using the 4
screws.
6. Plug in the icemaker or reconnect power.
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Problem Solving Chart
PROBLEM
CLEAN INDICATOR
LIGHT ON CONTROL
PANEL IS YELLOW
CLEAN INDICATOR
LIGHT ON CONTROL
PANEL IS RED
ICEMAKER DOES
NOT OPERATE
ICE CUBES
HAVE ODOR/TASTE
ICEMAKER IS ON,
BUT DOESN’T
PRODUCE ICE
ICEMAKER IS ON,
BUT PRODUCES
LITTLE OR NO ICE
ICEMAKER PUMPS
CONTINUOUSLY,
BUT PRODUCES
NO ICE
ICE IS THIN, SOFT
OR CLUMPED
ICEMAKER SOUNDS
POSSIBLE CAUSE
• It will soon be time to clean the icemaker. You will need WX08X42870 Nickel Safe
Ice Machine Cleaner to clean the icemaker.
See Care and Cleaning–Care for your Icemaker.
• It is time to clean the icemaker. See Care and Cleaning–Icemaker System section.
• Power cord is not plugged into a live outlet.
• The control is set at OFF.
• The fuse is blown/circuit breaker is tripped. Replace fuse or reset the breaker.
• ZPK1 Auxiliary Kit fault.
• Drain line kinked or blocked.
• High mineral content in the water supply. Water may need to be filtered or treated.
• Food items stored in ice bin. Do not store any foods in the ice bin.
• Packaging materials were not removed. Make sure that all packaging materials
were removed at the time of installation.
• Ice storage bin needs cleaning.
• Scale has built up in the icemaker. If there is white scale buildup in the icemaker’s
water or freezing system, you should clean the icemaker.
See Care and Cleaning—Icemaker System.
• The control is set at OFF.
• Water supply is turned off or not connected.
• Condenser is dirty. Dirt or lint may be blocking the airflow through the condenser.
See Care and Cleaning—Condenser.
• Scale has built up in the icemaker. If there is white scale buildup in the icemaker’s
water or freezing system, you should clean the icemaker.
See Care and Cleaning—Icemaker System.
• Check for a kink in the drain hose from the ZPK1 Drain Pump Kit to the house drain.
• Water supply has been interrupted.
• Have a plumber check for a clogged water valve.
• Room temperature is colder than normal. Room temperature must be above
55˚F (13˚C). Otherwise, bin thermostat may sense cold room temperature
and shut off even though the bin is not full of ice. Also, unit may not restart once
it does shut off.
• Condenser is dirty. Dirt or lint may be blocking the airflow through the condenser.
See Care and Cleaning—Condenser.
• Scale has built up in the icemaker. If there is white scale buildup in the icemaker’s
water or freezing system, you should clean the icemaker.
See Care and Cleaning—Icemaker System.
• Water is leaking from the water reservoir because the drain cap is not secure.
Make sure the drain cap is securely tightened. Refer to illustration in
Care and Cleaning—Icemaker System section.
• Room temperature is too hot. Room temperatures of more than 90˚F (32˚C)
will reduce ice production.
• The ice sheet is trapped on the cutter grid. Shut off the icemaker for at least one
hour to allow the ice sheet to melt. Turn the icemaker back on. The icemaker will
reset itself and start a new cycle after flushing water through the system. NOTE:
Follow the directions in the Care and Cleaning—Icemaker System section to clean
with the Nickel Safe Ice Machine Cleaner.
• High mineral content in the water supply. Water may need to be filtered or treated.
• Scale has built up in the icemaker. Clean your icemaker.
See Care and Cleaning—Icemaker System section.
• The ice bin is not refrigerated, so ice not regularly used will melt and form clumps.
Break the clumps with the ice scoop provided.
• After an ice-making cycle, you may hear ice cubes dropping into the storage bin.
• Water is circulated by a pump through the icemaker during the entire ice-making
cycle. Water is added once per ice-making cycle.
• The compressor may cause a clicking or chirping sound when attempting
to restart.
• The flow of refrigerant through the refrigerating system may make a gurgling
sound like boiling water.
• A “whooshing” sound may indicate the water supply is not connected properly,
the water supply is turned off or the drain cap is loose.
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Component Locator
Light Switch
Electronic
Control Board
Push-button
Switch
Dual Transformer
Evaporator*
Cutter Grid
Bin Thermistor
Water Level
Sensor
Water Recirculation
Pump
Compressor
Reservoir
Drain Pump
Condenser Fan Motor
Hot Gas Valve & Solenoid
(Behind Condenser)
Condenser
Measured F1 Water Valve
Condenser Accumulator Tube
* The evaporator thermistor is located on
tubing below the evaporator.
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Water System Component Locations
Water Distributor
Evaporator
Water Level Sensor
Water Return Tube
Water Recirculation Pump
Reservoir Pan
Manual Drain
Reservoir Drain Pan
Drain Overflow
Water Valve Outlet Tube
Bin Drain
Measured Fill
Water Inlet Valve
From Water Supply
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Components
Door and Gasket
Bin Light Bulb
Note: If unit has a handle attached to the top of the
door it must be removed to access the hinge screw.
To remove the door, remove the large screw from
the top of the icemaker door, pull the door open, and
lift the door off the bottom hinge.
Remove two 1/4-in. hex-head screws from the
bottom of the cutter grid cover and pull the cover
from the ice machine.
Reach in and above the cutter grid to the depression
in the bottom of the control assembly. Grasp the
bulb and pull straight down.
Cutter Grid Cover
Note: Be sure to check the new gasket for a proper
seal after it is installed.
To remove the door gasket, open the icemaker door
and pull the gasket out of the door track.
The bulb is a #917 auto type (12V) and can be
purchased locally.
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Bin Thermistor
Cutter Grid
To remove the bin thermistor:
To remove the cutter grid:
Remove two 1/4-in. hex-head screws from the
bottom of the cutter grid cover and pull the cover
from the ice machine.
1. Remove two 1/4-in. hex-head screws from the
bottom of the cutter grid cover and pull the
cover from the ice machine.
Cutter Grid Cover
Cutter Grid Cover
Disconnect the thermistor plug from the bottom of
the control panel.
Remove the hex-head screw and clamp securing
the thermistor to the side wall and remove
thermistor.
2. Disconnect the cutter grid and bin thermistor
connectors from the bottom of the control
housing.
3. Remove the 2 hex-head screws from both sides
of the cutter grid, (Note that the longer screw
and white spacer are on the right side.)
Thermistor Plug
Disconnect
Disconnect
Note: Take care not to scratch the icemaker liner.
4. Slide the cutter grid forward and out of the unit
and place it on a protected work surface.
The bin thermistor should read 12.49 KΩ at room
temperature.
°F
0
10
32
50
70
90
°C
-18
-12
0
10
21
32
5. Remove the spacer from the right cutter grid
bracket tab.
Thermistor Resistance
81,715 - 99,874 Ω
59,422 - 72,627 Ω
30,266 - 36,992 Ω
18,219 - 22,267 Ω
10,280 - 12,564 Ω
6,387 - 7,807 Ω
Spacer
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6. Unsnap the 2 ice guides, if necessary, from
the cutter grid tabs. (There should be a slight
outward tilt after the guides are installed.)
Evaporator Thermistor
To remove the evaporator thermistor:
1. Remove the cutter grid. (See Cutter Grid.)
2. Disconnect the evaporator thermistor from the
bottom of the control housing.
Ice Guide
Ice Guide
3. Remove the 2 hex-head screws from the water
trough and pull the trough from the unit.
Disconnect
7. Bend the metal tabs outward, if necessary.
4. Reach behind the accumulator, and unclip the
evaporator thermistor.
5. When installing, snap the thermistor onto the
evaporator tubing behind the accumulator.
Water Distributor
1. Remove the cutter grid from the unit. See (Cutter
Grid.)
2. Pull out on the left and right water distributor
retainers, and remove the tabs from the slots in
the evaporator.
3. Pull the distributor forward and remove the
water hose.
Water Hose
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To Remove the Dual Transformer
Electronic Control Housing Components
1. Disconnect the 6-pin wire connector from the
harness.
Note: The control housing components consist of:
•
Electronic control board
•
Dual transformer
•
Light switch
•
Push-button switch assembly
2. Remove the 2 mounting screws from the
transformer bracket.
3. Disconnect the green ground wire from its
terminal.
1. Remove the cutter grid cover and the cutter
grid. (See Cutter Grid.)
2. Disconnect the 2 thermistor connectors. (See Bin
Thermistor and Evaporator Thermistor.)
Transformer
3. Remove the 4 hex-head screws from the control
housing and lower the housing to access the
components.
2nd screw on opposite side
To Remove the Light Switch/Push-Button
Assembly
Note: If the switch assembly or light switch is
replaced, the replacement part and decorative
overlay must be ordered using the model number of
the icemaker. The service replacement switch is not
supplied with a decorative overlay
1. Peel off the decorative overlay from the front of
the control housing.
To Remove the Electronic Control Board
1. Disconnect the 6 harness connectors from the
board terminals.
2. Remove the 2 mounting screws and remove the
electronic control board.
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2. Disconnect the Molex plug from switch
assembly.
Water Recirculation Pump
Remove the ice from the storage bin prior to
removing the recirculation pump.
Note: Pump operates on 12 VAC and has a
resistance of 3.8Ω.
To remove the water recirculation pump:
1. Unscrew the drain cap from the reservoir, drain
the water, and replace the cap tightly.
2. Remove the hex-head screw from the water
recirculation pump shield and remove the shield.
3. Press the back of switch assembly and push the
switch assembly out of the housing.
Drain Cap
3. Disconnect the water fill tube from the pump
mounting bracket.
4. Disconnect the wire recirculation and drain
pump connectors from the harness block.
Disconnect
Disconnect
Water Fill Tube
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5. Remove the 2 thumbscrews from the reservoir
and remove the reservoir from the icemaker.
Water Level Sensor
Remove the ice from the storage bin prior to
removing the recirculation pump.
To remove the water level sensor:
1. Remove the hex-head screw from the water
recirculation pump shield and remove the shield.
(See Water Recirculation Pump.)
2. Disconnect the water level sensor electrical
connection.
6.
Remove the recirculation pump outlet tube.
3.
Remove the retaining clips, if present.
4.
Pull the sensor up and out of the bracket.
7. Remove 3 hex-head screws from the pump
mounting bracket and remove the pump/water
level sensor assembly.
Disconnect
Outlet Tube
Water Level Sensor
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Reservoir Drain Pump
Condenser Fan Motor
Remove the ice from the storage bin prior to
removing the recirculation pump.
To remove the condenser fan motor:
1. Disconnect the water and drain lines from
the icemaker and remove the unit from its
installation.
Note: Pump operates on 12VAC and has a
resistance of 3.8Ω.
To remove the reservoir drain pump:
1. Unscrew the drain cap from the reservoir, drain
the water, and replace the cap tightly.
2. Remove the 4 hex-head screws from the front
panel and remove the panel.
2. Remove the recirculating pump cover hex-head
screw.
Drain Cap
3. Disconnect the reservoir drain pump electrical
connection.
4. Remove the pump-retaining Phillips-head screw
and bracket.
5. Rotate the pump 1/4 turn and pull it down and
out of the reservoir.
3. Remove the two 5/16-in. screws from the front
of the cabinet.
4. Remove 2 hex-head screws from the measured
fill water valve bracket.
5. Allow the valve to drop down out of the way.
Disconnect
Measured Fill Water Valve
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6. From the back of the unit, remove the 4 hexhead screws from the unit compartment cover
and remove the cover.
9. Tilt the front of the cabinet back until you can
access the 2 side screws on the condenser fan
motor shroud, and secure the cabinet so that it
cannot tip forward or backward.
10. Disconnect the wire connector from the
condenser fan motor.
11. Remove the 4 screws (2 bottom and 2 side)
from the condenser fan motor shroud. Slide the
shroud assembly back towards the compressor,
and then lift and remove the assembly from the
unit.
Disconnect
7. Remove the two 5/16” screws from the rear of
the cabinet.
Note: If the unit you are servicing is not equipped
with an internal drain pump, skip the next step.
12. Remove condenser fan motor blade by pulling
the fan blade straight off the shaft.
8. Disconnect the inlet tube and the vent tube from
the internal drain pump.
Note: Make sure when reinstalling the fan blade
that the blade is seated completely on the motor
shaft.
Vent Tube
13. Remove the 2 hex-head screws from the
condenser fan motor and remove the motor
from the shroud.
Inlet Tube
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Measured Fill Water Valve
Hot Gas Solenoid
To remove the measured fill water valve:
To remove the hot gas solenoid:
1. Turn the water supply off to the icemaker.
1. Tip the cabinet back and securely prop it up to
access the hot gas valve solenoid.
2. Remove the 4 hex-head screws from the front
panel and remove the panel.
3. Remove the 2 hex-head screws from the
measured fill water valve bracket.
2. Disconnect the 2-wire connector from the
solenoid terminals.
Disconnect
Measured Fill Water Valve
Note: Place a pan or towel under the valve to catch
the water.
3. Disconnect the water inlet and outlets tubing
from the quick-disconnect fittings on the
measured fill water valve.
3. Remove the 7-mm hex-head screw from the
solenoid and lift the solenoid off the hot gas
valve.
4. Disconnect the 2 electrical connectors from the
valve.
Outlet Tube
Inlet Tube
Disconnect
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Sealed System
Hot Gas Valve
Compressor
To remove the hot gas valve:
To remove the compressor:
1. Remove the solenoid from the hot gas valve.
(See Hot Gas Solenoid.)
1.
Unplug icemaker or disconnect power.
2. Access the sealed system and discharge the
refrigerant into an approved recovery system.
2.
Open the icemaker door.
3.
Remove the ice from the storage bin.
4. Disconnect the water and drain lines from
the icemaker and remove the unit from its
installation.
3. Unbraze the hot gas valve from the tubing.
Caution: When installing the new hot gas valve,
use a generous amount of thermal heat trap paste
between the valve and tubing joints to protect the
valve when brazing.
5. At the front and rear of the unit, remove
the 4 hex-head screws from the unit outer
compartment cover and remove the cover.
Evaporator
Accumulator
Capillary Tube
Hot Gas
Valve
Condenser
Accumulating
Tube
Heat Exchanger
Path of warm liquid
refrigerant pushed by highpressure refrigerant gas
Suction
Tube
Compressor
Condenser
High-Pressure
Refrigerant Gas
6. To remove the terminal cover, use a flat blade
screwdriver. Insert the screwdriver under the clip
to unsnap and remove it.
Warm Liquid
Refrigerant
Low-Pressure
Refrigerant Gas
Drier
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7. Remove the wires from the ground terminal,
the overload protector terminal, and the relay
terminal.
15. Pull the clips off the compressor mounting studs.
16. Lift the compressor off the 4 mounting studs
and remove it from the unit.
8. Pull the overload protector and relay from the
compressor pins.
17. Remove the 4 metal spacers and rubber
isolators from the compressor stud locations.
9. Pull the 2 clips off the rear studs of the
compressor.
10. Tip the front of the cabinet back and prop it up.
11. Access the sealed system and discharge the
refrigerant into an approved recovery system.
12. Cut the suction and discharge lines from the
compressor.
Caution: Do not use a torch to remove the drier
filter.
13. Cut the drier filter from the system.
14. Unbraze the compressor suction and discharge
joints from the tubing.
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Condenser
Evaporator
To remove the condenser:
To remove the condenser:
1. Unplug ice maker or disconnect power.
1. Unplug the ice maker or disconnect the power.
2. Tip the front of the cabinet back and prop it up.
Note: If unit has handle attached to top of door it
must be removed to access hinge screw.
3. Remove the 4 condenser fan motor screws from
the fan motor shroud. Pull the motor assembly
back away from the condenser as far as
possible, but do not remove it.
4. Remove the 2 mounting screws from the
condenser bracket flanges.
2. Remove the top door screw from the icemaker
door, and pull the door off the bottom hinge.
3. Remove the ice from the storage bin.
4. Remove the cutter grid and the evaporator
thermistor from the unit. (See Cutter Grid and
Evaporator Thermistor.)
5. Disconnect the bin thermistor connector from
the bottom of the control housing.
6. Remove the two 5/16-in. hex-head screws from
the top hinge and remove the hinge.
5. Access the sealed system and discharge the
refrigerant into an approved recovery system.
6. Unbraze the 2 condenser joints from the tubing.
7. Remove the 2 front and 2 rear screws from the
cabinet top.
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8. Lift the cabinet top and position it forward on
top of the unit, and then remove the permagum
from around the electrical throughput.
Remove Permagum
11. Lift the cabinet top off the unit and stand it on
the floor near the rear of the unit.
12. Remove the hex-head screw from the water
recirculation pump shield and remove the shield.
13. Pull out on the left and right water distributor
retainers and remove the tabs from the slots in
the evaporator.
14. Disconnect the hose from the water distributor
and remove the water distributor.
Note: In the photo above, the rear channel cover has
been removed for clarity.
9. From the rear of the unit, remove the 6 hexhead screws from the channel cover and
remove the cover.
10. Remove the 4 hex-head screws from the unit
compartment cover and remove that cover.
14. Remove the 4 Phillips-head screws from the
evaporator, and then carefully lift the evaporator
just high enough to remove the 2 right spacers.
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15. Lift the evaporator and its connecting tubing
high enough from the unit to access the tubing
underneath.
Hot Gas
Joint Valve
16. Access the sealed system and discharge the
refrigerant into an approved recovery system.
17. Unbraze (or cut) the evaporator from the tubing
at the following locations:
•
Suction line at the compressor
•
Hot gas line at the hot gas valve
•
Cut the capillary tube at the drier filter
Drier Filter Capillary Tube
Suction Line
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Component Testing
Before testing any of the components, perform the
following checks:
Water Recirculation Pump and
Reservoir Drain Pump
•
Leads are 3.6 Ω at 12 VAC.
•
Control failure can be the result of corrosion
on connectors. Therefore, disconnecting and
reconnecting wires will be necessary throughout
test procedures.
All tests/checks should be made with a VOM or
DVM having a sensitivity of 20,000 Ω per volt DC,
or greater.
•
Check all connections before replacing
components. Look for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough.
•
Resistance checks must be made with power
cord unplugged from outlet, and with wiring
harness or connectors disconnected.
Condenser Fan Motor
Run the service mode. Check for the proper operation
of the condenser fan motor, 185 Ω at 120 VAC.
Water Level Sensor
Run the service mode. Check for the proper
operation of the water level sensor. The Service LED
should stay on solid when the water level sensor is
immersed in water. When the water level sensor is
out of the water, the Service LED should blink.
Hot Gas Valve Solenoid
Leads are 365 Ω to 390 Ω at 120 VAC.
Bin and Evaporator Thermistors
Measured Fill Water Valve
Note: For the most accurate measurement,
immerse the thermistor in ice water for 5 minutes
and then use the 32°F/0°C reading in the chart
below.
Run the service mode. The connector with black and
white wires should read 120 VAC. The orange/white
wire to the black/red wire should read 14 VDC.
Compressor, Overload Protector, and Relay
°F
0
10
32
50
70
90
°C
-18
-12
0
10
21
32
To test the compressor windings:
Thermistor Resistance
81,715 - 99,874 Ω
59,422 - 72,627 Ω
30,266 - 36,992 Ω
18,219 - 22,267 Ω
10,280 - 12,564 Ω
6,387 - 7,807 Ω
Common (C) pin to the Start (S) pin should read
8 to 11 Ω.
•
Common (C) pin to the Run (M) pin should read 2
to 3 Ω.
To test the relay:
1. Position the relay with the coil facing down.
2. Insert the tip on one of the ohmmeter test leads
into the Run (M) pin socket, and touch the other
ohmmeter lead to the spade terminal. The meter
should indicate a closed circuit (0 Ω).
Cutter Grid
Leads are 4 Ω to 5 Ω at 8.4 VAC
Dual Transformer
•
Primary black and white leads are 3.5 Ω to 4.5 Ω
at 120 VAC.
•
Secondary yellow and yellow leads are 0.11 Ω
to 0.14 Ω at 8.4 VAC.
•
•
3. Move the tip of the ohmmeter test lead from
the spade terminal into the Start (S) pin socket.
Leave the other ohmmeter lead at the Run (M)
location. The meter should indicate an open
circuit (infinite).
4. Turn the relay over so that the coil faces up.
Secondary red and red leads are 0.14 Ω to 0.18
Ω at 12 VAC.
5. With the tip of the ohmmeter test leads at the
Start (S) and Run (M) pin sockets, the meter
should indicate a closed circuit (0 Ω).
(Continued next page)
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Board Connectors
See Page 40
See Page 32
See Page 32
See Page 32
See Page 40
See Page 32
See Page 40
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Component Connectors
See Page 32
See Page 32
See Page 40
See Page 40
See Page 40
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Control Board Diagnostics
Flush Mode: (Start-up Cycle) (6 minutes maximum)
Harvest Mode
The Flush Mode begins:
The time in this mode will be 2 to 17 minutes,
dependent on the condition of the evaporator
thermistor.
•
Every time the user plugs the icemaker in.
•
The interface is changed from OFF to ON.
•
When the icemaker is turned on after the
completion of the CLEAN cycle, or
•
On auxiliary drain pump models only, power
cycled off due to water touching the overfill
contact. This is often due to slow or blocked
drain, or a blocked vent hose.
The compressor and hot gas valve is on for a
minimum of 1 minute.
Note: There is a 4-min. fixed cycle time if the
evaporator thermistor is disconnected or open.
Harvest Mode: Bin Not Full
When the power is applied or the icemaker is turned
ON at the user interface:
•
Water valve fills 45 oz. Maximum fill time is 2
minutes.
•
Recirculation pump runs for 1 minute.
•
Reservoir drain pump is on for 20 sec., off for 20
sec., then on for 20 sec.
•
Water valve fills to the selected volume.
Maximum fill time is 2 minutes.
•
Enter freeze mode
Note: If the water level drops below the sensor
before 5 minutes, the control counts a Hung Slab.
If the water level sensor is not detected, the control
sets a 25-minute freeze time.
Water continues to recirculate until the water level
in the reservoir drops below a level determined by
the water level sensor. At this point, the control
terminates the freeze mode and initiates the
Harvest Mode.
•
Reservoir drain pump is on for 20 sec., off 20
sec., then back on for 20 sec.
•
Measured water fill is requested. Compressor
and hot gas valve are on until: evaporator
thermistor reads greater than 52°F and more
than 1 minute, but less than 16 minutes have
passed; or after 4 minutes if the evaporator
thermistor is unplugged or open.
Harvest Mode: Bin Full
Freeze Mode: (Ice-Making)
Time in this mode is dependent on the water
level in the reservoir. There is no minimum time.
The maximum time is 25 minutes. Compressor,
condenser fan, and recirculation pump are all
energized.
When the bin thermistor reads greater than 36°F:
The time in this mode with the bin full will be a
minimum of 5 minutes. The mode continues as long
as the bin is full and the bin thermistor remains less
than 36°F.
Compressor and hot gas valve are on until the
evaporator thermistor is greater than 52°F and more
than 1 minute but less 16 minutes have passed;
or after 4 minutes if the evaporator thermistor is
unplugged or open.
Idle Mode:
Time in this mode is dependent on the temperature
at the bin thermistor.
Bin Not Full (Bin Thermistor Greater than 36°F)
The control sends a reservoir fill request and Freeze
Mode begins.
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Harvest Failure Mode:
If while in Harvest Mode, the evaporator thermistor
is less than 52°F and more than 16 minutes have
passed, Harvest Failure Mode will occur and the OFF
LED will flash 3 blinks. This mode will continue until
the failure is corrected.
1. OFF LED is flashing 3 blinks: Look for an
evaporator thermistor that has not reached
52°F. This may be due to an evaporator
thermistor being unplugged or open, a loose
or improperly positioned thermistor, a hot gas
failure, a sealed-system leak, or a restriction.
2. OFF LED is flashing 2 blinks: Look for a
disconnected or open bin thermistor.
Note: The bin thermistor is constantly checked
during the Flush Mode, the end of each Freeze
Mode, Harvest Modes, and Idle Mode.
Clean Mode:
Note: The customer instructions for clean cycle is on
the inside of door.
The Clean Mode may only be selected while the
icemaker is turned off (OFF pad held 3 sec.) at the
user interface.
Clean Mode is a 70-minute cycle:
•
When Clean Mode begins, The CLEAN light
flashes 1 sec. on, 1 sec. off.
•
The circulation pump, compressor, and hot gas
valve are energized for 40 minutes.
•
The water valve is energized for 3 minutes, and
then the recirculation pump for 3 minutes. This
is repeated 5 times for total of 30 minutes.
•
All components off, CLEAN LED remains on with
reservoir full.
Note: At the end of the Clean Mode, the icemaker
will stay off. CLEAN LED will be on green and OFF
LED on red. The reservoir is to be drained by the
consumer prior to restarting the icemaker. The
consumer must press OFF for 3 sec. before selecting
ON.
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Troubleshooting
,
o
.
o
.
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Problem
Probable Cause
Slab will not release during
harvest due to scale buildup
Will not make ice. Water
reservoir is empty. Evaporator Defective or disconnected hot
is cold with 3/4-inch thick or
gas valve
larger ice slab.
Defective hot gas valve
Room temperature over 100oF
(38oC)
Seeping water valve
condenser is hot
Partial refrigerant leak or
restriction (u-shaped slab)
Test Procedure - Action
Clean evaporator plate; See
procedure on 4-21
Test and repair or replace
Test and repair or replace
Customer instruction
Replace water valve
Check for leak/restriction and
repair or replace defective
component
Will not make ice. Water
reservoir is full. Evaporator is Blocked condenser or stalled Clean condenser, repair or replace
cold with thin, partial, irregular
fan motor
motor
or no ice slab.
Tube not attached to outlet of
Re-attach tube
recirculating pump
Repair or replace the pump motor
Defective recirculating pump
assembly
Partially blocked water
Clean distributor and evaporator
distributor
Test compressor, relay and
Compressor is not running
overload
Will not make ice. Water
Blocked condenser or stalled Clean condenser, repair or replace
reservoir is full. Evaporator is
fan motor
motor
warm.
Unit is in the start-up mode
Wait 5 minutes and re-check
Room temperature below 55oF Bin thermistor has unit shut off,
(13oC)
customer instruction
Seeping water valve
Poor ice production.
Replace water valve
condenser is hot
Slow or defective drain or drain
Repair or replace drain or drain
pump causing water to back up
pump
into the bin
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Problem
Probable Cause
Test Procedure - Action
Too much ice in bin
Defective bin thermistor
Replace
Banging sound
Noisy
Grinding, cavitating sound
Grinding, cavitating sound
from recirculation pump
Noisy drain pump
Ice freezing together in the
bin
Normal
Cloudy, poor-tasting ice
Poor water quality
Off LED flashing 2 blinks
Off LED flashing 3 blinks
See chart on 4-2 & 4-3
Open or disconnected bin Test thermistor and wiring harness
thermistor or thermistor wiring
or reconnect
Defective, loose, or misTest thermistor and wiring harness
positioned evaporator
or reconnect
thermistor
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The slab dropping off the plate
and ice dropping from the cutter
grid into an empty bin are normal
sounds
The reservoir is empty. Look for a
partially released slab,
interference with cutter grid, etc.,
and clean the evaporator plate.
See procedure on 4-21
If the reservoir is full, replace the
pump
Repair or replace
This is normal with low customer
usage
Service Test Mode (Diagnostic Mode)
diagnostics, press the ON pad.
Note: Drain the reservoir before entering service
test mode.
Note: If no pad is pressed within 5 sec., the product
goes into the automatic diagnostic mode used at
the assembly plant. Each component is cycled
for 5 sec.
1. Turn the icemaker ON.
2. Within 10 sec. of power on, press and hold the
ON and the CLEAN pads. (Release both pads
when all user interface LEDs begin to flash.)
Service Test Mode Chart
3. Within 5 sec. of all LEDs flashing, press and
release the OFF pad.
This begins manual diagnostics. The OFF pad is used
to advance through each step. To exit the manual
ORDER
1
COMPONENT
Entry Into Test
Mode
Bin Thermistor
Off pad to
advance
2
Off pad to
advance
3
Off pad to
advance
3
Continued
sensor check
4
Off pad to
advance
5
Off pad to
advance
6
Off pad to
advance
7
Off pad to
advance
8
Evaporator
Thermistor
ON LED
On
OFF LED
On
CLEAN LED
On
On Solid OK
2 Blinks Open
4 Blinks Short
Off
Off
Off
Off
Off
Blinking Reservoir Empty
On Solid OK
2 Blinks – Open
4 Blinks – Short
On
On
On
Water Valve 4
Minute Timeout
Clean Button
Press Will
Advance to Step 6
Water Level
Sensor
Off
(confirms sensor operation)
Recirculation
Pump
On
On
On
Reservoir Drain
Pump
On
Off
Off
Compressor and
Condenser Fan
On Solid
While Cooling
Compressor and
Hot Gas Valve
On Solid
While Heating
Twice Ice
Off
Ice Thickness
Off
Off pad to
advance
9
After pressing the OFF pad to enter manual
diagnostics, all LEDs will illuminate for 5 sec. The
controls will then automatically move to the Bin
Thermistor test. Use the OFF pad to advance.
Off pad to
advance
Blinking When Evap.
On
Thermistor Reaches 4.5 °F;
Full Frost Pattern Should be
Visible
On Solid While Heating
On Solid While Heating
Blinking When Evap.
Thermistor Reaches 52° F
Off
On Solid – No Delay
Blinking – 10 Min. Delay
Between Cycles
Press Clean Button to
Cycle Between Settings
2 Blinks – Thin
Off
4 Blinks – Normal
6 Blinks – Thick
Press Clean Button to
Cycle Between Settings
– 40 –
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(Continued next page)
Models with Internal Drain Pumps (ZPK1)
Thermistor Error Displays (OFF LED 2 or 3 Blinks
During Normal Operation)
When the OFF LED blinks 2 or 3 times, an error is
indicated. These errors will occur at any time during
normal operation if a thermistor fails.
2 Blinks ― OFF LED is blinking twice in repeating
intervals. This signifies a bin thermistor failure.
•
Check that the bin thermistor is plugged in to
the control box.
•
Check that the bin thermistor is not open or
shorted. Replace the thermistor if it is open or
shorted.
When the unit is first plugged in, the drain pump will
run for 20 sec. The power can be disconnected and
reconnected to verify that the pump is operating
properly.
Water from the icemaker reservoir, or melting ice
from the bin, drains down the bin drain tube into the
pump inlet, and then into the drain pump chamber.
As the water level rises, it bridges the Full contacts,
and the pump starts to run.
3 Blinks ― OFF LED is blinking three times in
repeating intervals. This signifies a harvest failure.
•
Check that the evaporator thermistor is
connected to the sealed-system tubing.
•
If the thermistor is plugged in, ensure that it is
fully connected to the control box. (The icemaker
will operate on a timed cycle if the evaporator
thermistor is unplugged.)
•
The power cord on the internal drain pump is
connected to a 120 VAC wall outlet. The icemaker
is then connected to the 120 VAC outlet on the
drain pump. If the drain pump fails, or if the drain
becomes blocked, power is shut off to the 120 VAC
outlet on the drain pump.
Check the resistance of the thermistor. If the
thermistor checks good, look for a hot gas
failure, a sealed system leak, or a restriction.
The pump discharges the water through the outlet
and the check valve. When the Full connection is
removed, the pump runs for an additional 12 sec. to
empty the tank.
If the water level in the drain pump continues to
rise, due to a slow or blocked drain or a blocked
vent hose, and touches the Overfill contact, power
will be turned off to the drain pump 120 VAC outlet,
causing the icemaker to turn off.
Internal Drain Pump
Pump Inlet
Vent Outlet
Contacts sense continually
through the water
Pump Outlet &
Check Valve
White
Black
Overfill Contacts
Green
Full Contacts
Connector Hose (Contains
Screen Washer)
Screen Washer
– 41 –
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Schematics and Strip Circuits
Refer to the mini-manual attached to the unit.
– 42 –
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(Continued next page)
Clean Mode Strip Circuit
Electronic Control
Bk
Water Recirculation Pump
Bu
Rd
Wh
Rd/Bk
Hot Gas Solenoid
Vi
Timing
Time = 20 Min
Wh
Transformer
Bk
Overload Compressor
Rd
Relay
Wh
Flush Mode Strip Circuit
Timing
Electronic Smart Valve
Bk
Wh
Fill Reservoir
or
Time = 2 Min
Rd/Bk
Time = 1 Min
Water Valve
Bk Transformer
Rd
Electronic
Control
Bu
GY
Water Recirculation Pump
Wh
Bu/Yl
Time = 30 Sec
Rd/Bk
Reserve Drain Pump
Electronic Smart Valve
BK
Fill Reservoir
Volume to Matching
Thickness Setting
Wh
Water Valve
Ice Making Mode Strip Circuit
Timing
Bk Transformer
Electronic
Control
Rd
Bu/Yl
Rd/Bk
Time = 30 Sec
Reserve Drain Pump
Wh
Vi
Wh
Hot Gas Solinoid
Rd
Bk
Wh
Overload Compressor
Relay
Electronic Smart Valve
Bk
Fill Reservoir
Volume to Matching
Thickness Setting
Wh
Water Valve
Harvest Mode Strip Circuit
Bk Transformer
Rd
Electronic
Control
Bu
GY
Wh
Bk
Rd/Bk
Water Recirculation Pump
Or
Wh
Condenser Fan
Rd
Wh
Overload
– 43 –
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Compressor
Relay
Warranty
What Is Covered:
From the Date of the Original Purchase
Limited One-Year Warranty:
For one year from date of original purchase, we will provide, free of charge, parts and service labor in
your home to repair or replace any part of the icemaker that fails because of a manufacturing defect.
Limited Five-Year Warranty:
For five years from date of original purchase, we will provide, free of charge, parts and service labor in
your home to repair or replace any part of the sealed icemaking system (the compressor, condenser,
evaporator and all connecting tubing) that fails because of a manufacturing defect.
This warranty is extended to the original purchaser and any succeeding owner for products purchased
for ordinary home use in the 48 mainland states, Hawaii, Washington, D.C. or Canada. If the product is
located in an area where service by a GE Authorized Servicer is not available, you may be responsible for
a trip charge or you may be required to bring the product to an Authorized GE Service location for service.
In Alaska the warranty is the same except that it is LIMITED because you must pay to ship the product to
the service shop or for the service technician’s travel costs to your home.
icemaker
icemaker.
– 44 –
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