Whirlpool GU1200XT User manual

I
MODEL NUMBERS:
GU1200XT
GU1500XT
POINT VOYAGER DISHWASHER
CONSUMER SERVICES TECHNICAL
EDUCATION GROUP PRESENTS KD-12
JOB AID
Part No. 8178022

PB
INTRODUCTION
This Job Aid, POINT VOYAGER DISHWASHER, Part No. 8178022 provides specific information on
the operation, diagnosis and repair of the Whirlpool Point Voyager series Undercounter Dishwasher.
POINT VOYAGER DISHWASHER has been compiled to provide the most recent information on de-
sign, features, operation, troubleshooting, and repair procedures.
GOALS AND OBJECTIVES
The goal of this Job Aid is to provide detailed information that will enable the service technician to
properly diagnose malfunctions and repair the Point Voyager dishwasher.
The objectives of the Job Aid are:
The service technician will -
• Understand proper safety precautions.
• Successfully troubleshoot and diagnose malfunctions.
• Successfully perform necessary repairs.
• Successfully return the dishwasher to proper operational status.
WHIRLPOOL CORPORATION ASSUMES NO RESPONSIBILITY
FOR ANY REPAIRS MADE ON OUR PRODUCTS BY ANYONE
OTHER THAN AUTHORIZED SERVICE TECHNICIANS.
© 2000 Whirlpool Corp., Benton Harbor, MI 49022

III
TABLE OF CONTENTS
MODEL/SERIAL NUMBER DESIGNATORMODEL/SERIAL NUMBER DESIGNATOR
MODEL/SERIAL NUMBER DESIGNATORMODEL/SERIAL NUMBER DESIGNATOR
MODEL/SERIAL NUMBER DESIGNATOR ....................................................
....................................................
.......................... iviv
iviv
iv
Section One
INSTALLATION CONSIDERATIONSINSTALLATION CONSIDERATIONS
INSTALLATION CONSIDERATIONSINSTALLATION CONSIDERATIONS
INSTALLATION CONSIDERATIONS ............................................................
............................................................
.............................. 11
11
1
GENERAL CONSIDERATIONS...............................................................1
SPECIFICA-SPECIFICA-
SPECIFICA-SPECIFICA-
SPECIFICA-
TIONS....................................................................................TIONS....................................................................................
TIONS....................................................................................TIONS....................................................................................
TIONS....................................................................................
22
22
2
Section Two
THEORY OF OPERATIONTHEORY OF OPERATION
THEORY OF OPERATIONTHEORY OF OPERATION
THEORY OF OPERATION ............................................................................
............................................................................
...................................... 33
33
3
CONTROL PANEL ...................................................................................3
Model: GU1200XTK
Cycle Selection Chart ..................................................................3
Option Selection ..........................................................................5
Cycle Status Indicators ...............................................................6
CONTROL PANEL ...................................................................................7
Model: GU1500XTK
Cycle Selection Chart ..................................................................7
FUNCTION DESCRIPTION......................................................................9
Section Three
COMPONENT ACCESSCOMPONENT ACCESS
COMPONENT ACCESSCOMPONENT ACCESS
COMPONENT ACCESS ................................................................................
................................................................................
........................................ 1313
1313
13
COMPONENT LOCATION.....................................................................13
ACCESSING COMPONENTS IN THE DOOR .......................................14
ACCESSING COMPONENTS INSIDE THE TUB ..................................17
ACCESSING COMPONENTS OF THE PUMP ASSEMBLY .................20
SERVICINGTHE DOORHINGE....................................................................23
Section Four
TROUBLESHOOTING AND DIAGNOSISTROUBLESHOOTING AND DIAGNOSIS
TROUBLESHOOTING AND DIAGNOSISTROUBLESHOOTING AND DIAGNOSIS
TROUBLESHOOTING AND DIAGNOSIS ......................................................
......................................................
........................... 2525
2525
25
TROUBLESHOOTING CHART..............................................................25
COMMON CYCLE TIME CHART...........................................................26
HOW TO USE COMMON CYCLE TME .................................................28
COMMON CYCLE TIME CHART NOTES .............................................31
DIAGNOSTIC CYCLE TIME CHART.....................................................35
RAPID ADVANCE FEATURE & DIAGNOSTIC CYCLES......................36
Section Five
TECH TIPSTECH TIPS
TECH TIPSTECH TIPS
TECH TIPS ..............................................................................................
..............................................................................................
............................................... 3737
3737
37
WIRING DIAGRAM ................................................................................ 37
MODEL SPECIFIC SERVICE PARTS TABLE.......................................38
USER INTERFACE SWITCH MATRIX...................................................38
STRIP CIRCUITS ...................................................................................39
ELECTRONIC CONTROL CONNECTOR PINS ....................................40

PB
MODEL/SERIAL NUMBER PLATE
SERIAL NUMBER DESIGNATOR
SERIAL NUMBER
MANUFACTURING SITE
F = Findlay, OH
YEAR OF MANUFACTURE
L = 2001
WEEK OF MANUFACTURE
PRODUCT SEQUENCE NUMBER
F L 36 50001
MODEL NUMBER DESIGNATOR
SAFETY
! WARNING
ELECTRICAL SHOCK HAZARD
Disconnect power before servicing the dishwasher.
Replace all panels before operating the dishwasher.
Failure to do so can result in death or electrical shock.
Model/Serial
Number Plate
(Left side of
frame behind
door)
MODEL NUMBER
Product Group
G = Gold Series Dishwasher
Product Identification
U = Undercounter
Series Code
800 = Baseline and Contract Models
900 = Midline and Retail Derivatives
1000 = Voyager Platform
Feature Code
PW = Premium Wash System
SW = Standard Wash System
XT = Extra Tall Tub
Year of Introduction
K = 2001
Color Code
B = Black Monochromatic
Q = White Monochromatic
T = Bisquit Monochromatic w/frameless panel
S = Black Console w/Stainless Steel panel
ENGINEERING CHANGE
0 = Basic Release; 1 = First Revision; 2 = Second Revision
G 1500
UXT K B0

1
SECTION ONE
INSTALLATION CONSIDERATIONS
GENERAL CONSIDERATIONS
For complete installation procedures see the “Installation Instructions” in the
literature packet provided with the dishwasher.
A video presentation, Key Features and Installation Considerations, part number
4317280V, is available. This video covers the entire installation process.
Each location will present a different set of challenges that can be anticipated and solved before instal-
lationbegins.
• Check the planned location of the dishwasher.
• Easy access to hot water, drain line and electricity.
• Convenient access for loading. The dishwasher door should open and close freely.
• The opening under the counter should be square and the cabinet fronts should be perpendicu-
lar to the floor.
• Make sure the cabinet opening is free of intrusions such as braces or utility lines.
• Do not install the dishwasher on carpeted floors.
• An outside wall behind the dishwasher should be insulated to prevent the water line, inlet valve
and drain line from rupturing.
The application of a horizontal pump and filter
technologyallowsforthetubtobedesignedthree
inches deeper than current models. This deeper
tub and longer door design will impact the instal-
lation process because there is less working
space available underneath the unit and correct
routing and placement of the drain hose, water
supply and electrical wiring is critical.
The tub must be level. Reduced water consump-
tionof this dishwasherrequires that it be installed
leveland plumbforproperwater recirculationback
into the sump area during operation.
Do not remove the drain
hose from the left side of
the tub. This loop in the
drain hose provides pro-
per back pressure for the
soil sensor. If the loop is
removed, the dishwasher
will not initiate Automatic
Purge Filtration. View of Sump Assembly from Underneath
Showing Horizontal Wash Pump Motor
and Drain Pump Motor
Drain Hose
Loop
Main Wash Motor
Drain Pump
Motor

2
ELECTRICAL SUPPLY: (Under Load)60Hz,120VAC
SUPPLY WATER FLOW RATE: (To Fill 2 Quarts (1.9 L) in 27 secs.) - 120psi Max., 20psi Min.
SUPPLY WATER TEMPERATURE: 120° F to 160° F (49° C to 71° C)
WATER CHARGE: 1.8 Gal. (6.8 L) / First Fill
1.7 Gal. (6.5 L) / All Other Fills
LOWER SPRAY ARM ROTATION: 25 TO 40 RPM
UPPER SPRAY ARM ROTATION: 25 TO 35 RPM
APF DRAIN: .1 Gal. (.38 L)
HEATING ELEMENT HEATING RATE: 1°+ F Rise per Minute
SPECIFICATIONS

3
Select the wash cycle and options desired. Upon
selectingthe cycle key, the cycle will beginimme-
diately. Cycles may be changed at any time, dur-
ing the first fill. Options can be selected or
changed at any time.
NOTE: Thelastoptions used will be recalled from
memory automatically upon selecting a cycle, (if
the option is valid with the cycle selected).
A “ ” shows what steps are in each cycle.
Temperaturesindicatewhereextraheat is added.
Water usage is shown in U.S. gallons/liters.
Cycle time includes dry time. An asterisk (*) by
the cycle time indicates the cycle time might be
longerdependingonthetemperatureofthe water
entering the dishwasher. The cooler the water,
the longer the cycle time. If the water is already
hot enough, the cycle time will be as shown.
Pots & Pans
SECTION TWO
THEORY OF OPERATION
CONTROL PANEL
MODEL: GU1200XTK
CYCLE SELECTION CHART
•
High
Low
248
CYCLES
High
Low 130 F
(54 C)
º
º
Rinse
High
Low Purge
Rinse

4
During the first minute of a cycle:
1. Press a new cycle and/or options.
2. Check the detergent dispensers. They
must be filled properly for the new cycle.
After the first minute of a cycle:
1. Press:
CANCEL/DRAIN glows. The dishwasher starts
atwo minutedrain(ifneeded.) Let thedishwasher
drain completely.
2. Check the detergent dispensers. They
must be filled properly for the new cycle.
3. Close the door.
4. Press a new cycle and/or options.
5. Press Start.
NOTE: The Soil Sensor monitors water pres-
sure at the output of the drain pump. Cycle time
and/or water usage can vary from the numbers
aboveas the sensor adjusts thecyclefor the best
wash performance. Water pressure varies de-
pending on the soil concentration in the accumu-
lator.
Oneorallof the following may be used toachieve
the desired washing performance of a selected
wash cycle.
Automatic Purge Filtration
TheAutomaticPurgeFiltration(APF)featuremay
also be invoked if the soil sensor detects exces-
sive soils. This can occur during selected wash
or rinse cycles. APF mode provides one or more
purges of excess soils trapped in the soil accu-
mulator at specified intervals in the cycle.
The APF operates for a total of 10 seconds while
the wash motor is operating in a wash or rinse
mode. The accumulator screen will be cleaned
fromjetson the underside of the lowersprayarm.
Duringthefirstfiveseconds,thedrainmotorturns
on and the fill valve is activated. This purges the
soiled water from the accumulator and begins to
add fresh water. For the remaining five seconds,
the drain pump is turned off, but the fill valve re-
mains activated to bring wash water up to proper
level.
Canceling a Cycle
Anytime during a cycle, press
The dishwasher starts a two minute drain (if
needed.) Let the dishwasher drain completely.
The light turns off after two minutes.
To Stop the Drain
PressCANCEL/DRAINa second time to stopthe
drain immediately. Always drain the dishwasher
before starting a new cycle.
To Clear the Indicators
Press CANCEL/DRAIN before starting the dish-
washer to clear all options and cycles.
Changing a Cycle or Setting

5
Items can be added any time before the main wash starts. Open the door and check the detergent
dispenser. If the cover is still closed, add items.
To Add Items:
1. Lift up the door latch to stop the cycle. Wait for the spraying action to stop before opening the
door.
2. Open the door. If the detergent dispenser cover is still closed, add the item(s).
3. Close the door firmly until it latches. The dishwasher resumes the cycle after a five (5) second
pause.
ADDING ITEMS DURING A CYCLE
OPTION SELECTION
Soak & Scour
Select this option to run a 4 hour pre-soak before the selected cycle. The pre-soak
consists of a standard fill, an initial 8 minute wash, then 13 wash pulses, each 90
seconds long with a 16 minute pause between pulses. This keeps the dishes wet
and soaking. At the conclusion of the pre-soak, the dishwasher drains and the
selected cycle begins.
NOTE: The Soak & Scour option is allowed with the Pots & Pans cycle only.
Hi-Temp Scour
Select this option to increase the target water temperature during the wash portion of
the cycle. Hi-Temp Scour raises this target water temperature to 145° F (63° C) in the
Main Wash for all cycles. In the Pots & Pans cycle, Hi-Temp Scour also raises the
target water temperature to 135° F (57° C) in the pre-wash. Heating the
water helps improve washing results. Hi-Temp Scour is useful when loads contain
baked-onfood.
This option adds heat, water and wash time by adding at least one additional rinse mode to the cycle.
NOTE: Hi-Temp Scour is an option with Pots & Pans and Normal.
Sani-Rinse
Select this option to raise the water temperature in the final rinse to approximately
160° F (70° C) for 10 minutes. Sani-Rinse adds heat and time to the cycle. In the
Normal cycle, this high temperature rinse sanitizes the dishes and glassware in accor-
dance with the NSF International requirements (#95/480/05/2480).
NOTE: Sani-Rinse is an option with the Pots & Pans and Normal cycles.
Air Dry Select this energy-saving option to dry without heat. Air drying is useful when loads
contain plastic dinnerware that may be sensitive to high temperatures. The dishes
take longer to dry and spotting can occur. For best drying, use a liquid rinse aid.
Some items, such as plastics, may need towel drying.
NOTE: Rinse Only does not have a dry period. Air Dry is an option with all other cycles.

6
To Turn off the Lock:
Press and hold Air Dry for 4 seconds. The LED turns off.
Delay Hours
Select this option to run the dishwasher at a later time or during off-peak hours.
To Delay the Start:
1. Close the door.
2. Press Delay Hours 1 time for a 2-hour delay, 2 times or a 4-hour delay or 3 times for an 8-
hourdelay.
3. Select a wash cycle and options.
The number glows above Delay Hours. The dishwasher starts the cycle in the selected number of
hours.
NOTE: To cancel the delay and begin cycle immediately, press Delay Hours until all delay hours LEDs
are off.
Control lock
UsetheControlLock to prevent the dishwasher from accidentally being turnedon. Use
the ControlLock, also, to prevent accidental cycle or option changes during a cycle.
When the Lock LED is lit, all buttons are disabled.
NOTES:
• The dishwasher door can be opened while the controls are locked.
• The lock can be turned on while the dishwasher is running.
To Turn on the Control Lock:
Press and hold Air Dry for four (4) seconds. The LOCK LED will glow.
Cycle Status Indicators
The progress of the dishwashing cycle can be followed with the Cycle Status Indicators.
248

7
Sensing/Soaking
The dishwasher senses the soil level on the dishes. Soil level determines the length of some cycles,
theamount of heat added tothewash and the numberofrinses needed in the cyclefor the load. It also
senses the temperature of the water during thermal hold water heating periods. SENSING/SOAKING
glows during the soil sensing and thermal hold portions of the cycle. Wash action continues while
sensing occurs. SENSING/SOAKING also glows during “soaking” events and the 4-hour pre-soak
cycle invoked by the Soak & Scour Option.
Sanitized
If the Sani Rinse option is selected, SANITIZED glows when the Sani Rinse cycle is finished. If the
dishwasher did not properly sanitize the dishes, the light flashes at the end of the cycle. This can
happen if the cycle is interrupted or the dishwasher failed to reach sani temperatures. The light goes
off when any key is selected or the door is opened and reclosed.
Clean
CLEANglowswhen a cycle is finished. The lightturnsoff when the door is openedandreclosedor any
key is pressed.
CONTROL PANEL
MODEL: GU1500XTK
CYCLE SELECTION CHART
Select the wash cycle and options desired. Upon selecting the cycle key, the cycle will begin immedi-
ately. Cycles may be changed at any time, during the first fill. Options can be selected or changed at
any time.
NOTE: The last options used will be recalled from memory automatically upon selecting a cycle, (if
the option is valid with the cycle selected).
A “ ” shows what steps are in each cycle.
Temperatures indicate where extra heat is added.
Water usage is shown in U.S. gallons/liters.
Cycle time includes dry time. An asterisk (*) by the cycle time indicates the cycle time might be longer
depending on the temperature of the water entering the dishwasher. The cooler the water, the longer
the cycle time. If the water is already hot enough, the cycle time will be as shown.
•
CYCLES OPTIONS

8
High
Low
High
Low 130 F
(54 C)
º
º
High
Low
Rinse
High
Low Purge
Rinse

9
FUNCTION DESCRIPTION
The washing action of the Point Voyager Dishwasher performs more work and maintains higher per-
formancewith reduced energy consumption. This isaccomplished with the following: 1) Aredesigned
wash system using separate wash and drain pumps. 2) A soil sensor and thermistor which monitor
washing conditions. 3) An electronic control board which adjusts cycle functions to optimize washing
performance.
Wash/Rinse Function
2a
2b
2c 3
4
5
6a
6b
7
8
10
11
7
11
1. The main wash water passes from the
sprayarm nozzles, over thedish load and
into the sump assembly, where a number
of operations occur.
2. Water and soils pass through the course
protectiongrate at thetop of thesump as-
sembly (2a) and then passes through the
foreign object protector (2b) into the main
wash pump inlet chamber (2c).
3. The water then passes through the chop-
per assembly where food particles are re-
duced in size so they can pass through
the water delivery system. (3)
4. Water is drawn through the impeller and
into the pump chamber. (4)
5. Here, 20 percent of the water is diverted
towards the soil accumulator. Food soils
in this water stream are captured by the
separation screen. (5)
6. Downstream restrictions limit the water
flow into the accumulator to 10 percent.
(6a) The remaining water is allowed to
rejoin the main wash flow by passing
through the separation screen. (6b)
7. This heavily soiled water is distributed
throughout the accumulator. (7) Soils will
remain trapped in the accumulator until a
drain or Automatic Purge Filtration event
takes place.
8. Since the water in the accumulator is un-
der some minimal pressure, it rejoins the
main wash water by flowing through the
accumulator screen into the tub. (8)
9. For this to occur properly it is critical that
thedishwasherbe installed perfectly level.
10. Jetslocated on the undersideof the lower
sprayarm continuouslywashdownthe ac-
cumulator screen to allow more soils to
concentrate. (10)
11. The remaining 80 percent of the wash
water will flow from the impeller through
thevolute and up through the spray arms.
(11)

10
Drain Function
1. During the Drain function, a separate drain pump motor is started while the main wash pump
motor continues to operate for 1 minute. (1) This accomplishes three goals.
2. First, the jets on the underside of the lower spray arm continue to flush soils from the accumu-
lator screen while the water is drained from the unit. (2)
3. Second, negative pressure in the main wash pump inlet chamber keepsthecheckvalveclosed,
allowing the drain pump to remove soiled water from the accumulator. (3)
4. Third, the spray arms will rinse down the interior of the wash tub while the water is drained,
leaving the inside free of soils. (4)
1
2
3
4
2
5
5. The main wash pump then stops creating positive pressure in the pump’s inlet chamber. This
opens the check valve allowing the remaining water to be drained away. (5)

11
3
2
Automatic Purge Filtration
1. The Automatic Purge Filtration feature may be invoked if the soil sensor detects excessive
soils. This can occur during selected wash or rinse functions. APF mode provides one or
more purges of excess soils trapped in the soil accumulator at specified intervals in a cycle.
2. The APF mode operates for a total of 10 seconds while the wash pump is operating in a wash
or rinse mode. The accumulator screen will be cleaned from jets on the underside of the lower
spray arm. (2)
3. During the first five seconds, the drain pump turns on and the fill valve is activated. This
purges the soiled water from the accumulator and begins to add fresh water. (3)
APF Function
First Five Seconds
2
4b
4a
APF Function
Last Five Seconds
4. For the remaining five seconds, the drain pump is turned off, (4a) but the fill valve remains
activated to bring wash water up to the proper level. (4b)
Theory Resources
The tech sheet, found behind the access panel provides a Common Cycle Time Chart. This chart will
allow the service technician to identify and track each operation of the dishwasher by timed interval.
See Section Four, Troubleshooting and Diagnosis for instruction on how to use this chart with the
Diagnostic Routines built into the electronic controls of the dishwasher.

12
-- NOTES --

13
SECTION THREE
COMPONENT ACCESS
COMPONENT LOCATION
Inner Feed Tube
Middle Spray
Arm
Water Inlet
Drain Tube
Heating
Element
Float
Door Latch Assembly
Electronic
Control Board
(Interconnect
Board Underneath)
Active
Vent
LowerSpray Arm
Sump and Motor
Assembly
Upper
Spray
Arm
Dispenser
Assembly
Control
Panel
Check Valve
(in drain hose)
Accumulator
Soil Sensor
Pressure Switch
Drain Pump Motor
Thermistor
Start Capacitor
Wash Pump Motor
Wash Pump

14
ACCESSING COMPONENTS IN THE DOOR
Removing the Console Panel
The control panel on the Voyager Dishwasher can be removed from the dishwasher door.
1. Remove the six (6) screws securing the control panel to the door frame. (Fig. 3-1)
2. The control panel will now drop down and be free of the door assembly. The wiring harness
will remain connected to the console components.
! WARNING
ELECTRICAL SHOCK HAZARD
Disconnect power before servicing the dishwasher.
Replace all panels before operating the dishwasher.
Failure to do so can result in death or electrical shock.
! IMPORTANT
Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic control as-
sembly. 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 un-
painted metal in the appliance. - OR - Touch your finger repeatedly to a green ground connec-
tion point or unpainted metal in the appliance.
• Before removing the part from its package, touch the antistatic bag to a green ground connec-
tion point or unpainted metal in the appliance.
• Avoid touching electronic parts or terminal contacts; handle electronic control assembly by
edges only.
• When repacking failed electronic control assembly in antistatic bag, observe above instruc-
tions.
Fig. 3-1

15
Removing the Electronic Control Board
The electronic control board is located inside the console at the top of the dishwasher door.
1. Disconnect the ribbon connector and the wiring harness connectors from the electronic control
board. (Fig. 3-2)
2. Use a flat bladed screwdriver to depress the holding tabs at the left end of the control board
assembly while pulling up. (Fig. 3-3, Inset)
Release the tabs securing the door latch assembly to the control panel and lift the assembly out. (Fig.
3-4, Inset)
Removing the Door Latch Assembly
Fig. 3-4
Tab
Inset
Fig. 3-2 Fig. 3-3
Inset
Use a flat bladed
screwdriver to depress
the holding tabs
at the left end
of the control board
assembly while pulling
up as shown here.

16
Removing the Active Vent
Assembly
The Active Vent Assembly is located in the con-
sole area.
1. Remove the six (6) screws securing the
control panel to the door frame.
2. Disconnectthe wiring harness connectors
from the wax motor terminals on the ac-
tive vent assembly.
3. Loosen, but do not remove the four T-15
Torx screws securing the left side of the
outer door panel to the door frame. This
will provide additional room to easily re
move the active vent assembly.
4. Using a flat bladed screwdriver in the slot
provided at the bottom of the interior vent
grille,turnthevent grille counterclockwise
¼ turn and remove the grille. (Fig. 3-6)
5. The active vent assembly will drop free of
the dishwasher door.
Fig. 3-6
Removing the Door Microswitches
The Door Switches are located on the right and left side of the door latch assembly.
1. Disconnect the wiring harness connectors from the microswitch terminals.
2. Pull back on the two (2) plastic retaining tabs securing the microswitches to the door latch
assembly and lift the microswitches out. (Fig. 3-5)
Fig. 3-5
Inset
Lift Microswitch
Spread Tabs
(Caution: These
tabs can break.)
Use Flat Bladed
Screwdriver and Turn
Interior Vent Grille ¼ Turn
Counter-clockwise