Whirlpool 4.3 CU FT User manual

TECHNICAL EDUCATION
JOB AID W10329932
L-84
Vertical Modular
Washer
L-93
SERVICE MANUAL
WHIRLPOOL 4.3 CU FT
COMPACT HEAT PUMP DRYER
W11040040A
Multimedia
Enhanced
WHD3090GW
WHD5090GW

ii n Whirlpool Compact Heat Pump Dryer
FORWARD
This Whirlpool Service Manual, (Part No. W11040040A), provides the In-Home Service Professional
with service informaon for the “WHIRLPOOL 4.3 CU FT COMPACT HEAT PUMP DRYER.”
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 washer.
For specic operang and installaon informaon on the model being serviced, refer to the “Use and
Care Guide” or “Installaon Instrucons” provided with the washer.
GOALS AND OBJECTIVES
The goal of this Service Manual is to provide informaon that will enable the In-Home Service
Professional to properly diagnose malfuncons and repair the “WHIRLPOOL COMPACT HEAT PUMP
DRYER.”
The objecves of this Service Manual are to:
• Understand and follow proper safety precauons.
• Successfully troubleshoot and diagnose malfuncons.
• Successfully perform necessary repairs.
• Successfully return the washer to its proper operaonal status.
WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our
products by anyone other than authorized In-Home Service Professionals.
Copyright © 2017, Whirlpool Corporaon, Benton Harbor, MI 49022

Whirlpool Compact Heat Pump Dryer n iii
TABLE OF CONTENTS
WHIRLPOOL COMPACT HEAT PUMP DRYER
SECTION 1 — GENERAL INFORMATION
DRYER SAFETY ....................................................................................................................................1-2
GENERAL INFORMATION ...................................................................................................................1-3
GENERAL THEORY OF OPERATION.....................................................................................................1-4
CONTROL PANEL AND FEATURES.......................................................................................................1-6
DRYER MAINTENANCE .......................................................................................................................1-7
MODEL & SERIAL NUMBER LOCATION ..............................................................................................1-8
TECH SHEET LOCATION.......................................................................................................................1-8
MODEL AND SERIAL NUMBER NOMENCLATURE ..............................................................................1-9
PRODUCT SPECIFICATIONS ..............................................................................................................1-10
SECTION 2 — DIAGNOSTICS & TROUBLESHOOTING
CONTROL PANEL.................................................................................................................................2-2
ABBREVIATIONS .................................................................................................................................2-3
ICONS..................................................................................................................................................2-3
DIAGNOSTIC GUIDE............................................................................................................................2-3
SERVICE DIAGNOSTIC MODE/SERVICE TEST CYCLE...........................................................................2-3
ACTIVATING SERVICE DIAGNOSTIC MODE ........................................................................................2-3
SERVICE TEST CYCLE ...........................................................................................................................2-4
SERVICE TEST CYCLE CHART ...............................................................................................................2-5
EXITING SERVICE DIAGNOSTIC MODE...............................................................................................2-6
FAULT/ERROR CODES..........................................................................................................................2-6
TROUBLESHOOTING GUIDE ...............................................................................................................2-8
SECTION 3 — COMPONENT TESTING
COMPONENT TESTING: SAFETY INFORMATION................................................................................3-2
WIRING DIAGRAM..............................................................................................................................3-3
COMPONENT TESTING .......................................................................................................................3-4
TEST #1: ACU POWER CHECK..............................................................................................................3-4
ACU BOARD / CONNECTORS & PINOUTS...........................................................................................3-5
TEST #2: SUPPLY CONNECTIONS (IF) ..................................................................................................3-6
TEST #3: MOTOR CIRCUIT (M) ............................................................................................................3-8
TEST #4: HEATING SYSTEM (COMPRESSOR).......................................................................................3-9
TEST #4A: HEAT PUMP (HE) ................................................................................................................3-9
TEST #4C: THERMISTOR (SET2).........................................................................................................3-11
TEST #5: MOISTURE SENSOR............................................................................................................3-12
TEST #5A: ADJUSTING CUSTOMER-FOCUSED DRYNESS LEVEL........................................................3-13
TEST #6: BUTTONS AND INDICATORS ..............................................................................................3-14
TEST #7: DOOR SWITCH (ACU)..........................................................................................................3-15
TEST #8: DRAIN PUMP (DP)..............................................................................................................3-16
TEST #9: WATER LEVEL SWITCH (SLE)...............................................................................................3-17
TEST #10: AUXILIARY FAN (FM) ........................................................................................................3-18
TEST #11: HEATER EXCHANGE SWITCH (HX) ....................................................................................3-19
TEST #12: COMMUNICATION BETWEEN UI AND ACU (W12)...........................................................3-20

iv n Whirlpool Compact Heat Pump Dryer
PRODUCT SPECIFICATIONS & WARRANTY INFORMATION SOURCES (inside back cover)
SECTION 4 — COMPONENT ACCESS
PARTS & ASSEMBLIES - TOP AND CONSOLE PARTS ...........................................................................4-2
PARTS & ASSEMBLIES - CABINET PARTS ............................................................................................4-3
PARTS & ASSEMBLIES - BASE PARTS ..................................................................................................4-4
PARTS & ASSEMBLIES - MOTOR PARTS..............................................................................................4.5
PARTS & ASSEMBLIES - DRUM AND BULKHEAD PARTS.....................................................................4-6
PARTS & ASSEMBLIES - DOOR PARTS.................................................................................................4-7
REMOVING THE DOOR ASSEMBLY & DOOR COMPONENTS .............................................................4-8
REMOVING THE TOP & SIDE PANELS .................................................................................................4-9
REMOVING THE INTERFERENCE FILTER...........................................................................................4-10
REMOVING THE CONSOLE/USER INTERFACE ..................................................................................4-11
REMOVING THE APPLIANCE CONTROL UNIT (ACU) ........................................................................4-12
REMOVING THE WATER TANK HOUSING.........................................................................................4-13
REMOVING THE DRIVE MOTOR .......................................................................................................4-14
REMOVING THE DRAIN PUMP, FLOW SWITCH AND FAN ASSEMBLIES...........................................4-15
REMOVING THE FRONT PANEL ........................................................................................................4-17
REMOVING THE DRUM ....................................................................................................................4-18
REMOVING THE FRONT BULKHEAD.................................................................................................4-19
REMOVING THE BACK PANEL...........................................................................................................4-20
REMOVING THE HEAT PUMP (BASE ASSEMBLY)..............................................................................4-21
* Video Available Look for this ICON throughout Secon 4
TABLE OF CONTENTS (CONTINUED)

GENERAL INFORMATION
Whirlpool Compact Heat Pump Dryer n 1-1
Section 1:
General Information
This secon provides general safety, parts, and informaon for
the “Whirlpool Compact Heat Pump Dryer.”
nDryer Safety
nIntroducon
nGeneral Theory of Operaon
nControl Panel and Features
nDryer Maintenance
nModel/Serial Number Locaon
nTech Sheet Locaon
nModel & Serial Number Nomenclature
nProduct Specicaons

1-2 n Whirlpool Compact Heat Pump Dryer
GENERAL INFORMATION
Dryer Safety
You can be killed or seriously injured if you don't immediately
You can be killed or seriously injured if you don't follow
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can
happen if the instructions are not followed.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety
messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word “DANGER” or “WARNING.”
These words mean:
follow instructions.
instructions.
DANGER
WARNING

GENERAL INFORMATION
Whirlpool Compact Heat Pump Dryer n 1-3
General Information
INTRODUCTION
The Whirlpool compact dryer has a 24” width and a ventless
design to take the next step in energy eciency. It recycles
air and removes moisture to provide the consumer with
a more ecient drying experience. It is exible enough to
install virtually anywhere and is our most space-saving dryer
available. Remove wrinkles with the Wrinkle Shield™ opon
that intermiently tumbles clothes for up to 12 hours aer the
cycle ends, or dry a small load quickly with the new “X-Dry”
cycle opon.
Features:
Space-Saving Design:
The Whirlpool compact heat pump dryer has a 24” width and
a ventless design. Its slim design makes it exible enough to
install virtually anywhere and has a 4.3 cu. . capacity that
provides room to t your clothes while sll being able to t
your space.
Sleek Tap Touch Controls with Memory:
Start the dryer quickly using the sleek control interface of the
Tap Touch controls with Memory. This technology allows direct
access to dryer funcons and even remembers the consumer’s
last cycle and sengs to save them me.
Figure 1
Baffles:
Care for each garment with baes that provide balanced
tumbling for gentle, perfect drying.
Cycles:
Refresh Cycle:
Refresh the load using the Refresh cycle, so dry, clean clothes
are ready to wear without needing to be rewashed.
Wool Cycle:
Keep cozy, dryable wool fabrics uy and smooth with the
Wool cycle that uses a gentle drying process.
Bulky Bedding Cycle:
Wrap up in a warm, fresh-from-the-dryer comforter. Perfectly
dry bedding or other bulky items with the Bulky Bedding cycle.
Air Dry Cycle:
Prevents heat damage to fabrics. The Air Dry cycle is great for
airing, refreshing and loosening up loads without added heat.
Figure 2
Opons:
Wrinkle Shield™ Option:
Help prevent wrinkles with the Wrinkle Shield™ opon.
Intermient tumbling helps keep wrinkles from seng into
clean clothes for up to 12 hours aer the cycle ends.
Gentle Dry Option:
Gentle drying for delicate loads with the Gentle Dry opon
that reduces the drying temperature.
X-Dry Option:
Dry a small load quickly when you’re on a ght schedule with
X-Dry.
24” Compact Heat Pump Dryer

1-4 n Whirlpool Compact Heat Pump Dryer
GENERAL INFORMATION
General Theory of Operation
Heat Pump Technology
A typical dryer uses large amounts of energy; this dryer
consumes a fracon of the energy by recycling and reclaiming
heat. This dryer is a ventless heat pump dryer that uses a
refrigeraon system to dry and recycle the same air. The
laundry is dried with low temperatures; therefore it may feel
cooler than expected during and aer the drying process.
The heat pump dryer’s heang phase is longer than in
tradional dryers. If possible, do not open the dryer door
during the process as heat can escape from the drum and can
make longer drying mes.
Benefits of a Heat Pump
• ENERGY: Regenerates energy to reduce overall energy
consumpon.
• PERFORMANCE: Allows exibility to manage drying
performance and energy savings.
• FABRIC CARE: Capability to use less heat than vented dryer.
• VENTLESS DESIGN: Allows installaon in more locaons
throughout the home.
New Sounds from a Heat Pump
• Dryer runs on a compressor like your refrigerator and you
may noce a hum from the compressor.
• The water from wet clothes is pumped out to your drain.
You may noce a gurgling sound occasionally.
Heat Pump Dryer Heating System
Sealed System Theory of Operation:
Mechanical heat pumps exploit the physical properes of a volale evaporang and condensing uid known as a refrigerant. The
heat pump compresses the refrigerant to make it hoer on the side to be warmed, and releases the pressure at the side where
heat is absorbed. Refer to the diagram below for the following operaons:
1. The refrigerant (R134a), in its gaseous state, is pressurized (heated) and circulated through the sealed system by the
compressor.
2. The now hot and highly pressurized gas is sent to the condenser secon of the heat exchanger unl it condenses into a high
pressure, moderate temperature liquid. The condenser heats up the process air which will be sent to the drum.
3. The condensed refrigerant then connues to the post condenser―with the help of the auxiliary fan―begins the cooling of
the refrigerant.
4. The refrigerant then passes through a pressure-lowering device such as an expansion valve, or in this applicaon, a capillary
tube further decreasing the temperature of the refrigerant.
5. The low pressure liquid refrigerant then enters the evaporator secon of the heat exchanger, in which the uid absorbs
heat, boils and is converted to a gas. This is accomplished when the fan blows the hot process air (from the drum) across the
evaporator, which also helps to remove moisture from the humid process air. The refrigerant then returns to the compressor
and the cycle is repeated.
2 - Condenser
Heat Exchanger
Assembly
5 - Evaporator
3 - Post Condenser
1 - Compressor
Assembly
4 - Capillary
Tube
Hot Process Air Out to Drum
Warm Humid Process Air In From Drum
HIGH SIDE
LOW SIDE
Figure 3 - Sealed System

GENERAL INFORMATION
Whirlpool Compact Heat Pump Dryer n 1-5
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
IMPORTANT: Electrostatic discharge may cause damage to machine control electronics. See page 1 for ESD information.
HEAT PUMP DRYER WIRING DIAGRAM
Figure 6 - Wiring Diagram, Heat Pump Dryer.
W W W W
GY
GY GY
BU
BU
W
W
W
W
BK
BK
BU BU
GY
GY
BR BR
RBR BR
BR
BU
G-Y
BK
W W
R
BR BR
G-Y
BU
GY
GY
OR
W
R
BK
BK R
W
BK R
G-Y
NOTE: The door switch is a part of the ACU.
General Theory of Operation (continued)
Heat Pump Dryer New Components
Post Condenser Fan – used for cooling the refrigerant in the post condenser. The fan is connected to J2 on the ACU.
Drain Pump – to drain water in the sump collected from the evaporator. The drain pump is connected to J3 on the ACU.
Water Level Switch – checks the water level in the sump. If the tank is full, the switch will be open. If the tank is empty, the
switch will be closed. The water level switch is connected to J8 on the ACU.
HX Filter Switch – is a magnec reed switch that signals the ACU when the Heat Exchanger Lint Filter is not installed. The dryer
will not operate if the Heat Exchanger Filter is not detected. The lter switch is connected to J8 on the ACU.
Whirlpool Heat Pump Compact Dryer Block Diagram
The Heat Pump Compact Dryer is not unlike its predecessor—the Whirlpool Hybrid Heat Pump Dryer. Most of the components
used in the Whirlpool Hybrid Dryer are also used in the new Heat Pump Compact Dryer. Think of the compressor as the heater.
RFI
MOTOR
COMPRESSOR
WATER LEVEL
SWITCH
ACU
Figure 4 - Block Diagram
MOISTURE
SENSOR
DRAIN PUMP
TEMP SENSOR
8.03 OHMS 8.89 OHMS
HX FILTER
SWITCH
USER
INTERFACE
POST COND FAN

1-6 n Whirlpool Compact Heat Pump Dryer
GENERAL INFORMATION
6
Control Panel and Features
Options
Delay
Start
Timed
Dry
Dryness
Level
P
Program
3 Sec
Cycle
Signal
Control
Lock
Hold 3 Sec
Steam
X-Dry
Dry
Damp
Dry
Mixed
Heavy Duty
Normal
Synthetics
Delicates
Wool
Air Dry
Refresh
Timed Dry
Bulky/Bedding
8
3 9
1 2 5
A B C D A B
4
POWER BUTTON
Touch until the indicator above the Program button lights
up. Symbols appear on the control panel and sounds are
played.
PROGRAM (cycle)
When you turn on the dryer, the light above this button
will turn on. The program settings which you used last
will appear on the control panel. This button also lets you
set water conductivity (see “Adapting the dryer to water
conductivity” for more information).
PROGRAM/CYCLE AREA
An indicator next to each program/cycle lights up as you
use the knob to scroll through the list. Press the knob when
the indicator next to the desired program/cycle lights up.
CONTROL KNOB
Turn the knob to select a program/cycle for your laundry
load, change dryness level, set drying time or delay start
time, or select Other Options. Press the knob to confirm
your selection.
OPTIONS
Touch to activate additional dry options or additional
features on the dryer before touching the Start/Pause
button. Additional dry options or additional features
selected after touching the Start/Pause button may
not be activated.
To return to factory default cycle settings, unplug the dryer
for 30 seconds, then plug back in.
NOTE: Not all options are available with all cycles.
Cycle Signal
Use to turn on or off the signal indicating the end
of a drying cycle.
NOTE: Touch and hold the Cycle Signal button for
about one second to turn sounds on or off.
Control Lock
Use to lock the controls of the dryer and avoid
an accidental change in cycle options or preferences
during a drying cycle.
Touch and hold CONTROL LOCK to lock or unlock
the controls of the dryer.
NOTE: The Control Lock function may be enabled
when recovering from a power failure. To unlock
the control, touch and hold CONTROL LOCK.
Steam
Touch to activate the Steam option, which adds
humidity to the end of the Heavy Duty, Normal,
or Synthetics cycle to help smooth out wrinkles.
Delay Start
Touch to start your program/cycle at a later time.
SETTINGS
Timed Dry
Sets the length of a Timed Dry cycle.
Dryness Level
When using some Automatic Cycles, you may
select a Dryness Level based on the type of load
you are drying.
NOTE: Dryness Level is for use with Automatic
Cycles only.
OTHER OPTIONS
Save Time
This option provides quicker drying.
Gentle
This option dries laundry more gently by reducing
the drying temperature.
Wrinkle Shield™
This option helps to avoid creasing if you cannot
unload the laundry soon after the program/cycle
ends. The dryer starts to tumble the laundry
periodically a few minutes after the program/cycle
ends. This tumbling will last up to approximately
12 hours. Tumbling can be stopped any time by
touching the Power button to turn off the dryer.
7
1
2
3
4
57
B
A
C
D
A
B
6
6
Control Panel and Features
Figure 5 - Control Panel
set water conducvity.