Whirlpool WRF954CIHV User manual
SERVICE MANUAL
W11366204
WRF954CIHM WRF954CIHB WRF954CIHW WRF954CIHV
WRF954CIHZ WRF964CIHV WRF964CIHZ WRF974CIHV
WRF974CIHZ WRF984CIHZ WRF984CIHV WRFA94CIHN
WRFA94CIHZ KRFC804GSS KRFC804GPS KRFC804GBS
WRF972SIHV WRF972SIHZ JFFCC72EFP JFFCC72EFS
KRFC604FSS KRFC704FBS KRFC704FPS KRFC704FSS
ii n French-Door Boom Mount Refrigerator
FORWARD
This Whirlpool Service Manual (Part No. W11366204), provides the In-Home Service Professional with service
informaon for the “French-Door Boom Mount Refrigerator.”
The Wiring Diagram used in this Service Manual is typical and should be used for training purposes only. Always
use the Wiring Diagram supplied with the product tech sheet when servicing the refrigerator.
For specic operang and installaon informaon on the model being serviced, refer to the “Use and Care
Guide” or “Installaon Instrucons” provided with the refrigerator.
GOALS AND OBJECTIVES
The goal of this Service Manual is to provide informaon that will enable the In-Home Service Professional to
properly diagnose malfuncons and repair the “French-Door Boom Mount Refrigerator.”
The objecves of this Service Manual are to:
• Understand and follow proper safety precauons.
• Successfully troubleshoot and diagnose malfuncons.
• Successfully perform necessary repairs.
WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our
products by anyone other than authorized In-Home Service Professionals.
©2019 Whirlpool Corporaon. Benton Harbor, MI 49022
French-Door Boom Mount Refrigerator n iii
TABLE OF CONTENTS
SECTION 1: DIAGNOSTICS...........................................................................................
SAFETY ................................................................................................................................................
MODEL AND SERIAL NUMBER AND WIRING DIAGRAM LOCATION..................................................
MODEL NOMENCLATURE ...................................................................................................................
THEORY OF OPERATION .....................................................................................................................
POWER DISTRIBUTION.......................................................................................................................
REFRIGERATION SYSTEM..................................................................................................................
MACHINE COMPARTMENT COMPONENTS......................................................................................
AIR FLOW SYSTEM ............................................................................................................................
WATER AND ICE SYSTEM ..................................................................................................................
DEFROST AND MOISTURE CONTROL ...............................................................................................
CONTROL PANEL ...............................................................................................................................
DIAGNOSTICS....................................................................................................................................
SECTION 2: COMPONENT TESTING ............................................................................
SAFETY ................................................................................................................................................
WIRING DIAGRAM..............................................................................................................................
COMPONENT LOCATION ....................................................................................................................
..............................................................................
MACHINE COMPARTMENT COMPONENTS........................................................................................
ACCESSING THE REFRIGERATOR DOOR PARTS ..................................................................................
ACCESSING REFRIGERATOR COMPARTMENT COMPONENTS ...........................................................
ACCESSING FREEZER COMPARTMENT COMPONENTS ......................................................................
..................................................
...............................................................................
iv n French-Door Boom Mount Refrigerator
Notes
DIAGNOSTIC
French-Door Boom Mount Refrigerator n
1-1
Section 1:
Diagnostics
This secon provides diagnosc mode and sales mode
informaon for the “French-Door Boom Mount Refrigerator.”
■Safety
■Model and Serial Number and Wiring Diagram Locaon
■Model Nomenclature
• Whirlpool® Model Nomenclature
• KitchenAid® Model Nomenclature
• JennAir® Model Nomenclature
■Theory of Operaon
• Power Distribuon
• 115 VAC Power Supply and Distribuon
• 12.7 VDC Power Supply and Distribuon
• Refrigeraon System
• Cooling Priority
• Air Flow System
• Water and Ice System
• Ice Making Process
• Defrost and Moisture Control
■Control Panel
■Diagnoscs
• FC Defrost Troubleshoong
• RC Defrost Troubleshoong
• Moisture Control Heater Troubleshoong
• Dispenser and IB Duct Heater (Door)
Troubleshoong
• Mullion Heater
• Water Troubleshoong
• Ice Troubleshoong
• RC and FC LED Lighng Troubleshoong
• Dispenser LED Light Troubleshoong
For Service Technician Use Only
DIAGNOSTICS
1-2 n
French-Door Boom Mount Refrigerator
Safety
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or
electrical shock.
Replace all parts and panels before operating.
Voltage Measurement Safety Information
When performing live voltage measurements, you must do the following:
■ Verify the controls are in the off position so that the appliance does not start when energized.
■ Allow enough space to perform the voltage measurements without obstructions.
■ Keep other people a safe distance away from the appliance to prevent potential injury.
■ Always use the proper testing equipment.
■ After voltage measurements, always disconnect power before servicing.
IMPORTANT:Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control
assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.
■ Use an antistatic wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the
appliance -OR-
Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
■ Before removing the part from its package, touch the antistatic bag to a green ground connection point or
unpainted metal in the appliance.
■ Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
■ When repackaging failed electronic control assembly in antistatic bag, observe above instructions.
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-3
Model and Serial Number and Wiring Diagram Location
Model and Serial plate.
Open the Left door and look
up to the front of the ceiling
Wiring diagram is located under
the right side hinge cover
For Service Technician Use Only
DIAGNOSTICS
1-4 n
French-Door Boom Mount Refrigerator
Model Nomenclature
MODEL NUMBER
INTERNATIONAL SALES OR
MARKETING CHANNEL
W R F 9 54 C I H
F = French Door
1 = OPP
I = In-door Ice
E = 2015
F = 2016
G = 2017
H = 2018
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-5
Model Nomenclature
MODEL NUMBER
INTERNATIONAL SALES OR
MARKETING CHANNEL
K R F C 60 4 F SS
F = French Door
E = 2015
F = 2016
G = 2017
H = 2018
Color
For Service Technician Use Only
DIAGNOSTICS
1-6 n
French-Door Boom Mount Refrigerator
Model Nomenclature
MODEL NUMBER
INTERNATIONAL SALES OR
MARKETING CHANNEL
J F F C C 72 E F P
F = 2016
G = 2017
H = 2018
Color
P = Pro SS
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-7
Theory of Operation
Power Distribution
The refrigerator components operate at 115 VAC, 140 VDC, and
various DC low voltages.
This secon describes how power is supplied to the refrigerator
and distributed to the control boards. The control boards provide
power output to individual components.
Power is supplied to the refrigerator by a plug and is ltered
through an Electromagnec Interference (EMI) lter. The EMI
lter prevents electrical interference from entering or leaving the
refrigerator over the power cord.
The EMI Filter is located in the machine compartment. It is
aached to the cover of the Orion Assembly.
The power cord mates to the EMI lter through a 4-pin
connector. Pin 3 (Line) and Pin 4 (Neutral) supply power from the
power cord to the EMI Filter. The 120 VAC output of the EMI lter
leaves the lter at Pin 1 (Line) and Pin 2 (Neutral) and is routed to
the Orion board Connector P1.
The Orion board is aached to the le rail in the machine
compartment. The board receives 115 VAC power and uses it to
power loads and distribute power to other control boards (Refer
gure on Page 1-9).
P1
1234
ORION BOARD
P1
NEUTRAL
BK (SMOOTH)
BK (RIBBED)
POWER CORD LINE
GROUND
EMI
FILTER
For Service Technician Use Only
DIAGNOSTICS
1-8 n
French-Door Boom Mount Refrigerator
Filtered 115 VAC power from the EMI Filter is supplied to the
Orion board at P1-1.
The Orion board supplies 115 VAC power to the following loads:
• Linear compressor
• FC door switch
The Orion board distributes the 115 VAC power to:
• Gemini ash board (GF2)
115 VAC Power is distributed From:
• Orion board, P1-4
115 VAC Power is distributed To:
• GF2 board, P1-1
• GF2 board, P3-5
The Orion board generates 12.7 VDC power from the 115 VAC
power supply. The 12.7 VDC power is used to power loads and
supply power to other control boards (Refer gure on Page 1-10).
The Orion board supplies 12.7 VDC power to the following loads:
• Freezer compartment LED lights
• Refrigerator compartment LED shelf lighng (select models)
• 3-Way valve
• Ice box fan
• Condenser fan
• FC evaporator fan
• RC evaporator fan
12.7 VDC from Orion board connector P4 supplies power for
communicaons between boards.
The Orion board distributes the 12.7 VDC power to:
• GF2 board
• From – Orion board, P16-1
• To – GF2 board, P6-2
• WIFI board (select models)
• From - Orion board, P16-1
• To – WIFI board, J3-1
• Eyebrow UI
• From – Orion board, P16-2
• To – dispenser UI, J4-1
• Dispenser UI
• From – Orion board, P16-3
• To – eyebrow UI, J1-1
C
A
B
A. 12.7 VDC Outputs
B. 115 VAC Output to GF2
C. 115 VAC Supply
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-9
Power
Cord
L1
N
BK (Smooth)
BK (Ribbed)
ORION BOARD
3
P15
P1
P16
P8 P9 P4
2
1
1
2
3
4
8
7
6
5
4
3
2
1
2
3
4
5
6
1
2
3
4
5
4
3
2
1
1
2
3
4
EMI
Filter
1
2
3
4
1
2
3
4
5
6
7
1
1
1
2
3
4
5
6
2
3
4
5
6
7
8
2
3
4
1
2
3
4
1
2
P1P2P12P3
P5
P4
P6
1
2
3
4
5
6
7
8
P8
1
2
3
P9
1
2
3
4
5
6
7
P14
1
2
3
4
5
6
P7
GF2 BOARD
FC SWITCH (LH)
BK / WH
BK / WH
WH / BK
WH / BK
BK / WH
WH / BK
RD / WH
BK / WH
Legend
Line
Neutral
For Service Technician Use Only
DIAGNOSTICS
1-10 n
French-Door Boom Mount Refrigerator
1
2
3
4
1
2
3
4
5
6
7
1
1
1
1
2
3
4
5
6
2
3
4
5
6
7
8
2
3
4
2
P1P2P12
P3
P5
P4
P6
1
2
3
4
5
6
7
8
1
2
3
1
2
3
4
5
6
7
1
2
3
4
5
6
P8P9
P14P7
GF2 BOARD
1
2
3
4
J3
123456
WIFI
BOARD
1
2
3
4
J1
User
Interface
(Eyebrow)
User
Interface
(LH Door)
1
2
3
4
J4
ORION BOARD
3
P15
P1
P16
P8 P9 P4
2
1
1
2
3
4
8
7
6
5
4
3
2
1
2
3
4
5
6
1
2
3
4
5
4
3
2
1
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-11
The GF2 board is located on the back le side of the cabinet
behind a metal cover. It receives 115 VAC and 12.7 VDC power
from the Orion board. It uses this power to produce 5 VDC
power, and supply loads.
The GF2 board is supplied 115 VAC power at P1-1 and P3-5.
Power is supplied from the Orion board, P1-4.
The GF2 board supplies 115 VAC power to the following loads:
• Pantry air bae
• Ice maker duct cabinet heater
• Freezer compartment defrost heater
• Refrigerator compartment defrost heater (selected models)
• Ice maker water valve
• Water isolaon valve
• Freezer compartment ice maker water valve (select models).
The GF2 board uses the 115 VAC power to generate a 140 VDC
power supply.
The GF2 board directly supplies 140 VDC power to the following
load(s):
• Ice dispenser motor
The GF2 board is supplied 12.7 VAC power at P6-2.
Power is supplied from the Orion board, P16-1.
The GF2 board directly supplies 12.7 VDC power to the following
load(s):
• Fill tube heater – FC ice maker (select models)
• Ice maker motor – FC ice maker (select models)
• Ice maker motor switch – FC ice maker (select models)
• Ice box fan (speed control)
• FC evaporator fan (speed control)
• RC evaporator fan (speed control)
• Condenser fan (speed control).
The GF2 board uses the 12.7 VDC power to generate a 5 VDC
power supply:
The GF2 board supplies 5 VDC power to the following loads:
• FC temperature thermistor
• RC temperature thermistor
• FC evaporator temperature thermistor
• RC evaporator temperature thermistor.
GF2 Board
12.7 VDC Supply
P6-2
P1-1 P3-5
115 VAC Supply
For Service Technician Use Only
DIAGNOSTICS
1-12 n
French-Door Boom Mount Refrigerator
Refrigeration System
The refrigeraon system compares actual compartment
temperatures to set-point temperatures. If the temperature is
too warm, the sealed system operates to cool the appropriate
compartment. Fans are run to move compartment air over the
evaporator, removing heat and cooling the compartment.
The refrigeraon system uses dual evaporators to control the
temperature of four temperature controlled zones located in two
separate compartments.
The compartments and temperature controlled zones are:
• Freezer Compartment (FC)
• Ice Box (IB)
• Refrigerator Compartment (RC)
• Temperature controlled drawer (pantry)
The refrigerator maintains the four temperature controlled zones
at the designated set-points. The temperature set-points for the
FC, RC, and Pantry are set using the Eyebrow UI. The IB set-point
temperature is xed at 14°F (-10°C).
Zone
C1 Freezer
Compartment
-5°F to 5°F
(-21°C to -15°C)
C1 Ice Box 5° F (-15°C) - Ice Making
14°F (-10°C) - Ice Bin Full
C2 Refrigerator
Compartment
33°F to 42°F
(0.5°C to 5.5°C)
C2 Pantry
Meats - 32°F (0°C)
Drinks - 35°F (2°C)
Deli / Cheese - 38°F (3°C)
The refrigerator compares the actual temperature to the
temperature zone set-point to determine when cooling is
necessary. Actual temperatures of the Pantry, RC, FC, and IB
are
determined by a thermistor located in each temperature zone.
The refrigerator can only cool one of the two compartments
at a me. If both compartments are calling for cooling,
the refrigerator uses a cooling priority to determine which
compartment is cooled rst. Cooling priories are assigned by
comparing actual temperature to the temperature set-point.
The larger the deviaon above set-point, the higher the priority.
There are four cooling priories:
• 3 – High Priority,
• 2 – Medium Priority,
• 1 – Low Priority,
• 0 – Sased
C1 Priority = FC Priority + IB Priority
C2 Priority = RC Priority + Pantry Priority
The compartment with the higher priority will cool rst.
If a compartment is cooling and another compartment calls for
cooling, the rst compartment will connue to cool unl either
the temperature is sased, or for 15 minutes, whichever comes
rst. Aer this me, cooling switches to the other compartment.
If both compartments have High priority—for example, a warm
refrigerator just plugged in—the refrigerator will enter Pull-Down
Mode.
A
B
C
D
A. Ice Box
B. Refrigerator Compartment
C. Pantry
D. Freezer Compartment
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-13
Machine Compartment Components
The sealed system uses a new, linear compressor to drive the
refrigeraon cycle.
Refrigerant is pumped through the condenser and a non-UV dye
drier to the three-way valve. The three-way valve aligns to allow
refrigerant to either the RC or FC evaporator, depending on which
is being cooled. A check valve is posioned at the outlet of the
FC Evaporator to prevent refrigerant back ow during RC cooling.
The linear compressor takes a sucon of the evaporator outlet of
the compartment being cooled.
Refrigerant ow has been updated to make the refrigerator more
ecient. The check valve that prevents refrigerant from one
evaporator to the other was eliminated.
While cooling the freezer secon, due to the low pressure in
the capillary tubing, the refrigerant will be in the evaporator of
refrigerator compartment but will not be owing through the
coil. The tubing was re-routed for the refrigerator evaporator to
go through the freezer evaporator to keep it cold then back the
compressor. The freezer fan does not run during this me.
One Way
Check Valve
One Way
Check Valve
Cooling Freezer
Cooling Refrigerator
Cooling Freezer
Cooling Refrigerator
For Service Technician Use Only
DIAGNOSTICS
1-14 n
French-Door Boom Mount Refrigerator
Air Flow System
The air ow system is composed of ducng and a number of
fans to provide air ow to the four temperature controlled zones
located in the RC and FC Compartments. Proper air ow allows
ecient removal of heat and uniform temperature distribuon in
each zone.
The air ow system also provides air ow in the machine
compartment, cooling equipment and removing waste heat from
the condenser.
All fans are supplied with a constant 12.7 VDC power from the
Orion board, P16-4. The fans are switched On, when necessary,
by a separate 12.7 VDC signal provided from the GF2 board.
The RC evaporator fan and the pantry air bae are located in the
evaporator cover assembly in the RC. They control airow to the
two temperature controlled zones, the RC and the pantry.
The RC evaporator fan is a variable speed fan. It moves RC air
over the evaporator to remove heat from the RC.
The RC evaporator fan is supplied with constant 12.7 VDC power
from Orion board P16-4. The fan is switched On and O by a
12.7 VDC gang signal from GF2 board P14-3. The gang signal
is adjusted based on temperature to change the speed of the fan
between HI (3450 rpm) and LOW (1725 rpm).
The RC fan is switched On any me the refrigeraon system is
cooling the RC. The RC fan will run for a period of me following
cooling, and then be switched o. If the refrigerator is in pull
down mode, the RC fan will run for an addional 20 minutes
aer compleon of RC cooling.
If the RC evaporator needs defrosng, the RC fan may run for up
to 10 addional minutes aer RC cooling.
The pantry is the second temperature controlled zone cooled by
the RC evaporator. The pantry is cooled by airow from the RC
fan directed through foam ducng in the RC evaporator cover
assembly. The pantry air bae is either full open, or full close
dependent upon pantry temperature.
The pantry is operated by 115 VAC power supplied from GF2
board P2-5. 115 VAC power is also supplied to a feedback switch
by GF2 board P2-2, providing the board with posion indicaon
for the pantry air bae.
The pantry air bae will open when:
• Pantry requests cooling.
• RC is cooling.
The pantry air bae will be CLOSED at all other mes.
The FC evaporator fan and the ice box fan are located in the FC.
They control airow to the two temperature controlled zones,
the FC and the ice box.
The FC evaporator fan is a variable speed fan. It moves FC air
over the evaporator to remove heat from the FC.
The FC evaporator fan is supplied with constant 12.7 VDC power
from Orion board P16-4. The fan is switched On and O by a
12.7 VDC gang signal from GF2 board P14-1. The gang signal
is adjusted based on temperature to change the speed of the fan
between HI (3450 rpm) and LOW (1725 rpm).
The FC fan is switched On any me the refrigeraon system is
cooling the FC. The FC fan will run for an addional 2 minutes
aer compleon of FC cooling. The FC fan will also run an
addional 2 minutes aer compleon of cooling while the
refrigerator is in Pull Down Mode.
The IB Fan is a variable speed fan located in the FC. It circulates
air from the FC Evaporator area to the IB in the le RC door to
maintain temperature at its set-point. For models with an ice
maker in the FC, it also circulates air over the FC ice maker.
The IB fan is supplied with constant 12.7 VDC power from Orion
board P16-4. The fan is switched On and O by a 12.7 VDC gang
signal from GF2 board P9-2. The gang signal is adjusted based
on temperature to change the speed of the fan between HI
(3450 rpm) and LOW (1725 rpm).
The IB fan is On any me the FC fan is On. The IB Fan is O when
the FC fan is O.
Air Baffle
Location
RC Fan Location
B
A
A. IB Fan
B. IB Air Duct Return
For Service Technician Use Only
DIAGNOSTICS
French-Door Boom Mount Refrigerator n
1-15
Water and Ice System
The water and ice system receives household supplied water,
lters the water, and makes it available to the water dispenser,
in-door ice maker, and on some models, a second ice maker in
the freezer.
Water is supplied into the refrigerator through an isolaon valve,
directed to a water tank, then ltered and sent to the dual valve
controlling water ow to the water dispenser and Ice Maker.
On models with a freezer ice maker, ltered water is sent to a ‘T’
ng which directs water to the dual valve, and a second single
valve for the freezer ice maker.
The isolaon valve is located in the machine compartment on
the right rail. The valve is normally closed. The valve only opens
when water is being provided to the water dispenser, or either
ice maker.
The valve is opened by 115 VAC power supplied from GF2 board,
P12-4.
The outlet of the water reservoir is directed to the water lter.
The water lter is located behind the water lter door at the
front le boom of the RC.
The water lter supply line, and the rear of the water lter
housing are heated to prevent condensaon and freezing.
The dispenser UI tracks water dispensed and age of the lter
providing water lter indicaon on the dispenser UI. Water lter
indicaon informaon is given in below table.
Indicator Gallons Dispensed Filter Age (Days)
No Indicator 0 - 160 0 - 144
“Order Filter” 161 - 200 145 - 180
“Replace Filter” >200 >180
The water lter outlet is directed to the dual valve. The dual
valve directs the water supply to the water dispenser, or in-door
ice maker through individual valves.
The water lter outlet is directed to a ‘T’ ng. The ‘T’ ng
directs water to the dual valve and to the freezer ice maker ll
valve.
The Dispenser UI is responsible for dispensing water to the in-
water dispenser. The GF2 board controls water dispensing to the
in-door ice maker, and freezer ice maker (some models).
The dispenser is controlled by the front paddle of a stacked dual
paddle, or by the measured ll feature available on the dispenser
UI.
When water is requested the dispenser UI sends the request to
the GF2 board, which opens the isolaon valve. The dispenser UI
opens the low voltage Water Valve.
The GF2 board supplies 115 VAC to GF2 board, P12-4, opening
the isolaon valve.
The dispenser UI supplies 11.5 VDC dispenser UI, J8-5, opening
the water valve and dispensing water.
The dispenser UI controls all aspects of the in-door ice maker,
including the Fill Cycle. The ice maker Fill Cycle is 10 seconds,
lling the ice tray with about 3.2 oz. (100 ml) of water.
During a Fill Cycle, the Dispenser UI communicates to the GF2
board. The GF2 board supplies 115 VAC to P12-4, opening
the Isolaon Valve. At the same me, the GF2 board supplies
115 VAC to P3-3, opening the Water Valve for the In-Door Ice
Maker.
Aer 10 seconds, the Dispenser UI instructs the GF2 board to end
the Fill Cycle, the GF2 board removes power to the valve, ending
the Fill Cycle.
The Freezer Ice Maker is controlled by the GF2 board. This Fill
cycle is 10 Seconds, lling the ice tray with about 3.2 oz. (100ml)
of water.
A
From Water
Filter
From Reservoir
to Water Filter
B
C
A. Freezer IM Valve
B. ID IM Valve
C. Water Valve
For Service Technician Use Only
DIAGNOSTICS
1-16 n
French-Door Boom Mount Refrigerator
During a Fill Cycle, the GF2 board supplies 115 VAC to P12-4,
opening the Isolaon Valve. At the same me, the GF2 board
supplies 115 VAC to P12-6, opening the FC Ice Maker Valve.
Aer 10 seconds, the GF2 board to ends the Fill Cycle. The GF2
board removes power to the valves, to end the Fill Cycle.
The refrigerator contains an Ice Maker (IM) in the le RC Door.
Some models have a second IM in the Freezer.
Both are Twist Tray Ice Makers, using twisng acon of the motor
to break and dump the ice. No heaters are needed for the IM.
All ming, logic, and control is outsourced to the control board
powering the IM.
The In-Door IM is controlled by the Dispenser UI and is composed
of the Ice Maker Module.
The Ice Maker module includes the Gear Box, Ice Bin Switch, Ice
Box Temperature Sensor, and Ice Tray Temperature Sensor.
The Gear Box has a 12.7 VDC Motor which drives the Tray Gear,
turning the Ice Tray and operang the Bail Arm through an
associated worm gear. The Bail Arm is used to detect if the Ice
Bucket is full.
The Ice tray posion is determined by a wiper arm aached to
the tray gear. As the tray gear turns, the wiper runs over a
resistor ladder. As the wiper moves over the resistance ladder,
the resistance changes. The resistance sensed at any given me
tells the Dispenser UI the posion of the Ice Tray.
The Ice Bin Switch is a spring loaded, normally open switch. The
switch is closed by the Ice Bucket when inserted. The switch must
be closed for the Ice Maker to Harvest ice.
The Ice Box Thermistor is mounted on the Ice Maker. It senses Ice
Box temperature as an input into the Refrigeraon System.
The Ice Tray Temperature Sensor is mounted to the underside of
the Ice Tray. It reads the temperature of the Ice Tray to ensure
the ice is fully frozen.
The standard Ice Making process consists of the following cycles:
• Homing
• Filling
• Freezing
• Harvest
When power is inially applied to the Ice Maker, it will move
to the home posion. In the Home Posion, the Ice Tray is
horizontal and ready to receive water.
During the Fill Cycle, water is dispensed for 10 seconds. This lls
the Ice Tray with about 3.2 oz. (100 ml) of water. At the beginning
of the ll cycle, the ll tube heater is forced o. The ll tube
heater remains o for 20 minutes. Aer this me delay, the ll
tube heater will energize and remain energized for 90 minutes, or
unl the beginning of the next Fill Cycle, whichever comes rst.
During Freezing, the IM is waing for me and temperature
condions to be met. These condions vary between the Door
Ice Maker and the Freezer Ice Maker.
For the Door Ice Maker, in the Normal mode, an 80 minute freeze
mer must be sased, and the Ice Tray temperature must read
15°F (-9.4°C) before the ice is ready for Harvest.
In Max Ice mode, a 60 minute freeze mer must be sased, and
the Ice Tray temperature must read 15°F (-9.4°C) before the ice
is ready for Harvest. The Max Ice feature only aects the In-Door
Ice Maker, and not the Freezer Ice Maker.
During Freezing, the freeze mer will be paused any me an
RC door is opened. When the RC door is closed, addional me
will be added to the mer. The addional me added is equal to
the length of me the door was open. The mer will then begin
counng down again.
Wiper Arm
Resistance
Ladder
Ice Box
Thermistor
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