Viking FDB451 Series User manual

Service
Manual
Built-In
Dishwasher
Preferred Service
FDB451
VDB451
SMK-0005
Aug 2012
®
This manual is to be used by qualied appliance technicians only. Viking
does not assume any responsibility for property damage or personal
injury for improper service procedures done by an unqualied person.
This Base Manual covers general and
specic information including, but not
limited to the following models:

Table of Contents
B ©2012 Viking Preferred Service
Safety Information ........................................... 3
Important Information ...................................... 3
General Information......................................... 4
Warnings ......................................................... 4
Water ....................................................... 4
DRAIN ..................................................... 4
Electrical.................................................. 4
Model–Serial Number Matrix........................... 6
Settings and Functions.................................... 7
Control Operation ................................... 7
Wash Cycles.................................................... 7
POTS / PANS .......................................... 7
NORMAL WASH...................................... 7
LIGHT/CHINA.......................................... 7
FAST WASH............................................ 7
RINSE/HOLD .......................................... 7
Options ............................................................ 7
HI TEMP WASH ...................................... 7
SANITIZED 155˚F RINSE ....................... 7
DELAY START......................................... 7
AUDIBLE SOUND SIGNAL..................... 7
ILLUMINATION OF BUTTONS ............... 8
Cycle Data............................................... 8
POWER ON LIGHT................................. 8
Preparing Dishes............................................. 9
Before Operation ..................................... 9
Option Restrictions .................................. 9
Changing a Program After the Unit has
Started................................................... 10
Opening door after cycle starts ............. 10
Entering Diagnostic Mode ............................. 11
Fail Codes ..................................................... 12
Parts Location–Door...................................... 14
Door Disassembly ................................. 15
Outer Door Removal ............................. 15
Control Panel Removal ......................... 16
User Interface Removal......................... 16
Start Button Removal ............................ 17
Start Switch Removal ............................ 17
Door Latch Interlock Removal ............... 18
Detergent Dispenser ............................. 19
Door Spring and Cable Assembly ......... 20
Door Hinge Disassembly....................... 21
Parts Location - Interior ................................. 22
Lower Spray Arm Removal.................... 23
Coarse Strainer Removal ...................... 23
Fine Strainer Removal........................... 23
Upper Rack Removal ............................ 23
Vent Assembly Removal................................ 24
Base Pan–Front View.................................... 25
Base Cover Disassembly .............................. 25
Parts Location - Base Unit............................. 26
Drain Motor Disassembly ...................... 27
Wash Diverter Disassembly .................. 28
Circulation Motor Disassembly.............. 29
Water Heater Disassembly.................... 30
Water Temperature Sensor Removal .... 30
Fill Valve Disassembly........................... 31
Control Board Disassembly.................. 31
Huba (Pressure) Sensor Removal................. 33
Blower Removal ............................................ 34
Control Board Test Points............................. 35
Control Board Diagnosis .............................. 36
Door Switch ........................................... 36
Detergent Dispenser ............................. 36
Circulation Motor ................................... 37
Fill Valve ................................................ 37
Drain Motor............................................ 38
Moisture Sensor ................................... 38
Wash Diverter........................................ 39
Water Temperature Sensor ................... 39
User Interface Port ................................ 40
User Interface Board ............................. 40
Water Heater ......................................... 41
Dry System............................................ 42
Troubleshooting Guide .................................. 44
Wiring Diagrams............................................ 45
Motor Control Circuits............................ 45
Schematic.............................................. 46

!
DANGER!
WARNING!
CAUTION!
WARNING!
CAUTION!
Important Information
©2012 Viking Preferred Service C
Safety Information
We have provided many important safety
messages in this manual and on the appliance.
Always read and obey all safety messages.
This is the safety alert symbol.
This symbol alerts you to hazards that can kill
or hurt you and others. All safety messages will
be preceded by the safety alert symbol and the
word “DANGER”, “WARNING”, or “CAUTION”.
These words mean:
IMMEDIATE HAZARDS WHICH WILL RESULT IN
SEVERE PERSONAL INJURY OR DEATH.
Hazards or unsafe practices which COULD result in
severe personal injury or death.
Hazards or unsafe practices which COULD result in
minor personal injury or product or property damage.
All safety messages will identify the hazard, tell
you how to reduce the chance of injury, and tell
you what can happen if the instructions are not
followed.
SAVE THESE INSTRUCTIONS
REVIEW ALL SERVICE INFORMATION IN THE APPROPRIATE SERVICE MANUAL AND
TECHNICAL SHEETS BEFORE BEGINNING REPAIRS.
Pride and workmanship go into every product to provide our customers with quality products. It
is possible, however, that during its lifetime, a product may require service. Products should be
serviced only by a qualied service technician that is familiar with the safety procedures required
in the repair and who is equipped with the proper tools, parts, testing instruments, and the
appropriate service manual.
To avoid risk of serious injury or death, repairs should
not be attempted by unauthorized personnel.
VIKING will not be responsible for any injury or
property damage from improper service procedures.
If performing service on your own product, you must
assume responsibility for any personal injury or
property damage which may result.
Technical support for authorized servicers:
1-800-914-4799
Address your written correspondence to:
Viking Preferred Service
1803 HWY 82 West
Greenwood, MS 38930

WARNING
The dishwasher has a factory installed back-
ow preventer. DO NOT add an additional
check valve .
WARNING
WARNING
WARNING
Plumbing connections must comply with
applicable sanitary, safety, and plumbing codes.
General Information
4©2012 Viking Preferred Service
Improper connection of the equipment –
grounding conductor can result in a risk of
electric shock. Check with a qualied electrician
or serviceman if you are in doubt as to whether
the appliance is properly grounded. DO NOT
modify the plug if it will not t the outlet, have a
proper outlet installed by a qualied electrician
Be sure electrical power is turned off at circuit
breaker or fuse box before servicing unit.
DO NOT use an extension cord for this appliance
Warnings
Read and follow all instructions before using
this appliance to prevent the potential risk of
re, electric shock, personal injury, or damage
to the appliance as a result of improper usage
of the appliance. Use appliance only for its
intended purpose as described in this manual.
To ensure proper and safe operation: Appliance
must be properly installed and grounded by a
qualied technician. DO NOT attempt to adjust,
repair, service, or replace any part of your
appliance unless it is specically recommended
in this manual. All other servicing should be
referred to a qualied servicer.
Water
• Water pressure for the water supply
should be a minimum of 10 to 125 psi. The
dishwasher is supplied with a 5’ (1.5 m)
braided stainless steel water line with 3/8”
(0.95 cm) compression tting connected to
dishwasher.
• After determining where the water supply
line will connect to the dishwasher, provide
a 2” (5.1 cm) access hole and run the water
supply line to the approximate ll valve
location.
• For service convenience, a shut-off valve
(not supplied) should be installed in the
supply line in a readily accessible location
(such as beneath the sink).
• It is recommended that the dishwasher be
connected to a hot water supply. If a cold
water supply is used, cycle times will vary.
• It is important that the water supply line
and the shut-off valve have a sufcient
ow volume. Flush the supply line prior
to connecting it to the intake line of the
dishwasher.
DRAIN
• The access hole for the drain line should
be 2” square (5.1 cm). Locate as low
and as near to the back wall as possible.
• DO NOT use any ttings anywhere in the
drain line that are less than 1/2” (1.3 cm) ID.
• If the drain line is going to be connected to
a food waste disposer, be sure to remove
the knockout or plug from the tting before
connecting drain line.
• Drain connection should be a minimum of
20” (51.0 cm) from the oor. If connection is
lower, siphoning during cycle can occur.
Electrical
This appliance must be grounded. In the
event of a malfunction or breakdown,
grounding will reduce the risk of electric
shock by providing a path of least
resistance for electric current.
Note: For this model, a power cord will have to be
purchased separately. The plug must be plugged
into an appropriate outlet that is installed and
grounded in accordance with all local codes and
ordinances.

WARNING
WARNING
WARNING
General Information
©2012 Viking Preferred Service 5
TIP OVER HAZARD
DO NOT push down on open door. Doing so
can result in serious injury or cuts
EXCESSIVE WEIGHT HAZARD
Use two or more people to move dishwasher.
Failure to do so can result in back or other
injury.
ELECTRICAL SHOCK HAZARD
Electrically ground dishwasher.
Connect ground wire to green ground connector
in terminal box.
DO NOT use an extension cord.
Failure to follow these instructions, can result in
death, re or electrical shock.

V D B 4 5 1 S S
0 4 1 0 1 2 D 1 0 0 0 0 2 3 4
SS= Stainless
Version
B= Built-In
D = Dishwasher
V= Viking
Month
Day
Serial number digits
Year of manufacture
Made in the USA
U
L
HOUSEHOLD DISHW ASHER
VIKING RANGE
CORPORA TION
GREENWOOD, MISSISSIPPI
MODEL
VDB451SS
120V 60Hz OPER 12.2A
2.5A
OTHER 15.5A
CSA
®
E
C U
S
LISTED
38930
USA
SERIAL NO
041012D10000234
General Information
6©2012 Viking Preferred Service
Model Numbers
Serial Numbers
The serial number and model number for your
appliance are located on the identication plate
mounted on the inside of the unit.
Model–Serial Number Matrix

Start
Resume
VIKING •Vari-Pressure Intelli-Wash
• Quiet Clean System
• Airflo Gentle Dry
POTS NORMAL LIGHT FAST RINSE CLEAN
PANS WASH CHINA WASH HOLD
SANITIZED HI TEMP TOP SANITIZED DELAY
WASH WASH 155F RINSE START
2
4
6
8
10
CYCLES OPTIONS
Operation
©2012 Viking Preferred Service 7
Settings and Functions
Control Operation
The following is the basic layout of the control panel and how it is referenced below.
Wash Cycles
POTS / PANS
Heavily soiled pots, pans and casserole
dishes. Long heated prewash loosens up
encrusted food. High temperature main wash
and nal rinse.
Normally soiled plates, glasses, bowls, and
lightly soiled pots and pans. Energy-usage
label is based on this cycle.
NORMAL WASH
LIGHT/CHINA
Lightly soiled items, china and crystal. Lower
temperatures for cleaning delicate items.
RINSE/HOLD
All dishware. Short rinse with no heat.
Options
HI TEMP WASH
Increases the temperature, adding heat,
time and water for improved cleaning
performance. Available only with POTS/
PANS and NORMAL WASH. Note: Periods of
soaking will occur to aid in removal of baked
on soils
SANITIZED 155˚F RINSE
DELAY START
Lets you delay running the dishwasher for up
to 10 hours. To set “DELAY START”, select
the desired wash cycle and option(s). Press
the “DELAY START” button once and the
number “2” will light, indicating a two hour
delay. If you desire a longer delay, continue
pressing the “DELAY START” button to a
longer delay. The corresponding number on
the button will light. Once you have set the
desired delay time, press the “START” button
and close the door. “DELAY START” is not
available with the Rinse/Hold cycle.
Raises water temperature to 155˚F in the
nal rinse. Adds heat and time to the cycle.
This high temperature rinse sanitizes your
dishes and glassware in accordance with
NSF/ANSI STANDARD 184 for Residential
Dishwashers. Certied for residential
dishwashers and not intended for licensed
food establishments. Available only with
POTS/PANS and NORMAL WASH.
AUDIBLE SOUND SIGNAL
A single beep will occur when you select
cycles, options and press the “START” key.
If the “START” button is not pressed or if
the door is not closed within 4 seconds of
pressing the “START” button, 3 short beeps
will occur. The end-of-cycle signal consists
of 2 long beeps and activates 30 minutes
after the last drain, when the condensate dry
portion of the cycle is completed. For all other
error messages and to deselect the audible
sound signal, see the Troubleshooting/ Fault
Codes section.
FAST WASH
To remove light lms and residue on dishes
and glassware. Short wash times and varying
pressures.

Operation
8©2012 Viking Preferred Service
ILLUMINATION OF BUTTONS
Options (continued)
Option, Cycle and Start buttons will only
illuminate after they are selected. The
"SANITIZED" indicator will illuminate when
the cycle has been completed. If your
dishwasher did not properly sanitize your
dishes, the indicator light will not illuminate.
This can happen if the cycle is interrupted
or the water could not be heated to the
required temperatures. The "SANITIZED"
indicator light goes off after you have
Cycle Data
Note: .Will perform properly if connected to "cold"
water (50oF / 10oC). Cycle times will be extended.
Note: All cycle times, temperatures and lls are
approximate and are dependent on installation and
environmental conditions.
Note: Heating delays to meet set temperatures may
extend the cycle times.
Note: AirFloTM Gentle Drying will add approximately
one hour to the total cycle time.
POWER ON LIGHT
A blue light will illuminate from the bottom
kickplate panel in the middle when a cycle is
running. This powewr on light will blink if the
cycle is interrupted.
opened and closed the door or if you press
and hold the START/RESUME button. The
START/RESUME button will blink if cycle is
interrupted.

Operation
©2012 Viking Preferred Service 9©2012 Viking Preferred Service 9
It is not necessary to rinse normal food soils off the dishes before putting them in the dishwasher,
although larger solid particles, such as bones, seeds, skins, pits, and toothpicks should be
removed.
Note: All wash times, temperatures and lls are approximate and are dependent on installation
and environmental conditions.
Note: Heating delays to meet set temperatures may extend the cycle times.
Note: Wash time does not include the 30 minute condensate dry time.
If you are not going to run the dishwasher immediately after loading, it is best to rinse salty
and highly acidic foods off stainless steel, silver, and silverplate atware. Prolonged contact of
foods—including lemon juice, salt, vinegar, mustard, mayonnaise, and salad dressings—with
stainless steel can cause corrosion (pitting).
Before Operation
1. Load the dishes per recommended loading. See section on Loading Dishwasher.
2. Make sure there is rinse agent in the dispenser. Add rinse agent if needed. See section on
Rinse Agent.
3. Add proper amount of detergent and pre-wash. See section on Dishwasher Detergent.
4. Push both top and bottom racks in.
5. Select the desired cycle and option(s).
6. Press “START”. The “START” symbol will illuminate to indicate the unit is ready.
7. Close the door tightly until you hear a click. Otherwise, the dishwasher will not start.
Option Restrictions
All options are not available for all cycles. Please note the following:
• The option “HI TEMP WASH” is not available with the “LIGHT/CHINA” or "FAST WASH" cycles.
• No options are available in the “RINSE/HOLD” cycle.
• The option "TOP WASH" is available only with the "NORMAL WASH" cycle.
• The option “SANITIZED 155˚F RINSE” is not available with the “LIGHT/CHINA” or "FAST
WASH" cycles.
After selecting the wash cycle and options, depress “START” button. The start symbol will
illuminate. This merely means the machine is ready. Close the door securely within 4 seconds of
pressing the “START” button.
Preparing Dishes

Operation
10 ©2012 Viking Preferred Service
Changing a Program After the Unit has Started
The dishwasher is programmed to stop operating if the door is opened during a cycle. To change
a program or option after starting the machine, open the door slightly to let the spray arms stop
rotating and avoid getting sprayed with water. Press and hold “START” for four seconds to cancel
the current selection, then press the touchpad(s) for your desired selection.
Press “START” again and close the door. The drain pump will run to remove any dirty water
from the dishwasher before starting the newly selected cycle. Check to make sure there is still
detergent in the detergent dispenser.
Opening door after cycle starts
If the door is opened after the cycle has started, the ”START” button will ash to indicate that the
dishwasher is in Standby Mode. Press the “START” button and close the door securely within 4
seconds to restart the cycle.

Start
Resume
VIKING •Vari-Pressure Intelli-Wash
• Quiet Clean System
• Airflo Gentle Dry
POTS NORMAL LIGHT FAST RINSE CLEAN
PANS WASH CHINA WASH HOLD
SANITIZED HI TEMP TOP SANITIZED DELAY
WASH WASH 155F RINSE START
2
4
6
8
10
CYCLES OPTIONS
System Diagnosis
©2012 Viking Preferred Service 11
Entering Diagnostic Mode
To enter the Diagnostic mode, press the left most program button ve times and then
immediately press the START” button, within 6 seconds. The unit will beep, and ash all LED's
three times. Close door to begin the Service cycle. To exit this mode before completion, hold
"START" key for three seconds.
1. Drains for 85 Seconds 5 Seconds On–5 Seconds Off–30 Seconds On–5 Seconds Off–40
Seconds On.
The test cycle will run approximately 6-1/2 minutes and will run each component individually.
Be sure to close the soap dispenser cup as this function will also be energized opening up
the cup.
2. Fills for 75 seconds.
3. Activates soap dispenser and wash arm diverter sets (duration varies).
4. Circulates top wash arm with heat for 40 seconds.
Note: Heater does not activate until the motor check is complete (16 seconds after motor
starts).
5. Water level check and wash arm diverter sets (duration varies).
6. Circulate lower wash arm with heat for 10 seconds.
7. Water level check and wash arm diverter sets (duration varies).
8. Circulate (lter clean) for 10 seconds.
9. Drains for 85 Seconds.
5 Seconds On–5 Seconds Off–30 Seconds On–5 Seconds Off–40 Seconds On
11. When complete, you will hear two long beeps approximately ten seconds after the drain
cycle stops. This is the indication that the test cycle has completed.
Note: During this test cycle, if the control board senses a failure that it is
programmed to monitor, it will display an error code.
10. Vent wax motor and blower motor energize for 10 seconds.

System Diagnosis
12 ©2012 Viking Preferred Service
Fail Codes
LED 1
Pots Pans
LED 2
Normal
Wash
Service
Cycle Only Error Code Cause Action / Possible Root Cause(s)
1 1
Moisture sensor
disconnect
Moisture sensor reads out of normal range
1. Wires disconnected to moisture sensor in base pan
2. Defective moisture sensor
3. Defective control board
1 2
Motor Control Status
Error
(Variable Speed Motor)
Motor control communicates a
motor operation failure mode that is most likely
caused by the motor control
1. Wires disconnected between motor control and motor
2. Defective motor control
3. Defective motor
1 3
Motor Control Comms
Error
Main control cannot succesfully communicate
with the motor control
1. Wires disconnected between motor controller and control board
2. Defective Motor control
3. Defective control board
1 4 Diverter Timeout
Main control activates the diverter,
but never sees feedback from the diverter that
the correct position is reached
1. Wires disconnected between control board and diverter
2. Defective diverter
3. Defective control board
1 5
Drain Error (pressure
sensor models)
During a drain, the pressure sensor output
never drops to the "empty" level
1. Verify that dishwasher drain hose is not clogged or kinked
2. Verify that plug has been removed from disposal (if so connected)
3. Verify that hose has a high loop per installation guide
4. Verify that dishwasher is level front to back and side to side
5. Verify that filters are not clogged
6. Defective drain pump
7. Defective pressure sensor
8. Defective control board
2 1
Pressure Sensor
Disconnect Error
Pressure sensor reads out of normal range low
1. Verify the pressure sensor is properly connected
2. Defective pressure sensor
3. Defective sensor harness
2 2
Fill Error (pressure
sensor models
During a fill, the pressure sensor output does
not reach target fill pressure
1. Verify water is turned on to dishwasher
2. Verify that fill line is not kinked
3. Verify that dishwasher is level front to back and side to side
4. Verfiy there has not been a decrease in water pressure
5. Defective pressure sensor
6. Defective control
2 3 Low Level Error
Pressure sensor indicates a water level lower
than the low level threshold
1. Low water level in sump (check that items are secured in rack)
2. Verify that the drain has the proper high loop
3. Defective pressure sensor
4. Defective main control
2 4 High Level Error
Pressure sensor indicates a water
level higher than the high level threshold
1. Excess water in sump (check that items are secured in rack)
2. Defective pressure sensor
3. Defective main control
2 5 X Siphon Error
Drains to fast (abnormal pressure sensor
change)
1. Make sure that unit is level front to back and side to side
2. Verify that the drain line has the proper high loop
3. Defective pressure sensor
4. Defective main control
3 1
User Interface - Main
Control
Communication Error
User interface is unable to successfully
communicate with the main control
1. Wires disconnected between main control and user interface
2. Defective cable between main control and user interface
3. Defective main control
4. Defective user interface
3 2 X Pump Flow Error
Control detects insufficient/inconsistent water
flow through the wash system and will not allow
the flow through heater to activate
1. Verify water is fully turned on to dishwasher
2. Verify that fill line is not kinked
3. Verify that dishwasher is level front to back and side to side
4. Verify that filters are not clogged
5. Verify that there has not been a decrease in water pressure
6. Verify that the drain has the proper high loop
7. Verify proper fill level
8. Enable extended fill service mode (press and hold Normal Wash for
10 seconds)
9. Defective wash motor
10. Defective water inlet valve
11. Defective main control
3 3 Drain Pump Error
Drain pump current sense is out of range
1. Wires disconnected between main control and drain pump
2. Defective drain pump
3. Defective main control
3 4 Motor Status Error
Motor control communicates a motor operation
failure mode that is most likely caused by the
motor
1.Verify connection between motor control and motor
2. Defective motor control
3. Defective machine control
3 5
Motor Under Voltage
Error
Motor control communicates a low motor
control voltage condition
1. Verify house voltage is in specification.
2. Verify connection at terminal block
3. Verify AC connection to the machine control
4. Verfiy connection between machine control and motor control
5. Defective machine control
6. Defective motor control

System Diagnosis
©2012 Viking Preferred Service 13
Fail Codes (cont'd)
LED 1
Pots Pans
LED 2
Normal Wash
Service
Cycle Only Error Code Cause Action / Possible Root Cause(s)
4 1
Temperature
Sensor Error
Temperature sensor
reads out of range
1. Wires disconnected to temperature sensor
2. Defective temperature sensor
3. Defective control board
4 2 X
Wash Heater
Error
Wash heater current
sense is out of range
1. Wires disconnected between main control and wash heater
2. Defective wash heater
3. Defective main control
4. Defective temperature sensor
4 3 X Dispenser Error
Dispenser current sense
is out of range
1. Wires disconnected between main control and dispenser
2. Defective dispenser
3. Defective main control
4 4 X
Inlet Valve
Error
Inlet valve current sense
is out of range
1. Wires disconnected between main control and inlet valve
2. Defective inlet valve
3. Defective main control
4 5
Fill too Fast
Error
Pressure sensor reaches
the fill level too fast
(abnormal pressure
sensor change)
1. Make sure that unit is level front to back and side to side
2. Verify the house water pressure is within specifications
3. Defective inlet valve
4. Defective pressure sensor
5. Defective main control
5 1 X Vent Error
Vent current sense is out
of range
1. Wires disconnected between main control and vent
2. Defective vent
3. Defective main control
5 2 X Blower Error
Blower current sense is
out of range
1. Wires disconnected between main control and blower
2. Defective blower
3. Defective main control
5 3 X
Dry Heater
Error
N/A on 451 model
1. Wires disconnected between main control and dry heater
2. Defective dry heater
3. Defective main control
5 4 X Current Sense
Error
Main control reads
current draw
when no loads are active
1. Defective main control
2. Defective wire harness
5 5 Internal Error
Main control or UI detects
a board
level failure
1. Defective main control
2. Defective user interface
Moisture
Sensor - water
detection
Moisture sensor output is
equivalent
to water in the pan
1. Water in base pan from overflow / leak
2. Defective moisture sensor
AC Power Loss
Power loss occurred
during a
running cycle
1. Power lost during a cycle
2. Reset by pressing and holding start for 3 seconds
Flash both LED1 and
LED2 continuously
Flash all LEDs but start
and run continuously

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
Disassembly
14 ©2012 Viking Preferred Service
Parts Location–Door
Door Latch Interlock Control Panel
Detergent
Dispenser
Outer Door Door Spring
Assembly
Inside View Side View
Hinge

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
CAUTION!
Disassembly
©2012 Viking Preferred Service 15
Door Disassembly
In order to gain access to the internal
components of the door, which includes
the detergent dispenser, start switch, door
interlock, and the user interface, you will
need to remove the front door panel and the
control panel.
Make sure that the outer door is held in place
while removing the screw so that the door does
not fall and become dented or scratched. The
inner door assembly is sharp and could result in
minor personal injury.
Outer Door Removal
In order to gain access to the inner door
assembly and detergent dispenser, you must
rst remove the outer stainless steel or wood
door panel. Open the door to a complete 90°
angle to expose the securing screws. Using
a T15 TORX screwdriver, remove the ten
screws, ve on each side.
Remove the four T20 TORX screws along the
top of the door indicated below by red arrows.
Then remove the two inner phillips head
screws (latch screws), indictaed below with
blue arrows
Carefully ease door to close position, do not
latch. Pull outer door panel out towards you a
few inches to expose electrical connections to
control panel (Control panel is still mounted to
outer door panel at this point.)
Remove wires going to the door latch and the
three connectors going to the control pad and
one connector going to start switch, shown
above.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
Disassembly
16 ©2012 Viking Preferred Service
Remove outer door assembly and place in a location to prevent damage to panel and household
items, preferably on a padded surface.
Control Panel Removal
In order to gain access to control panel, remove outer door panel, see outer door removal
procedure, Page 15.
With outer door panel removed put on padded surface to remove the control panel which is
mounted on the outer door panel.
Remove the two T20 Torx screws, circled in red above to remove control assy from outer door
panel.
Remove the four T10 Torx screws as indicated by arrows in photo above, remove user interface
board from control panel assembly.
User Interface Removal
In order to gain access to control panel, remove outer door panel, see outer door removal
procedure, Page 15.
Remove control panel, see Control Panel Removal.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
Disassembly
©2012 Viking Preferred Service 17
Keeper feet are inserted into
small rectangular holes in the
console, and screwed down
Start Switch Removal
Remove outer door panel, see Outer Door
Removal procedure, Page 15.
Remove the two T10 TORX screws that
mount Start switch to console, see red arrows
below, remove switch.
Start Button Removal
Using a very thin object such as the razor
blade shown below, slip under the button collar
and gently lift up until prongs release collar and
button.
When user interface is re-installed care must
be taken to face the four plastic keepers into
the control panel the correct way.
The screw goes into the recessed side of the
keeper, see photo below.
Recessed
side of
keeper
keeper
feet
The plastic keepers have two feet on each
keeper. These feet t into matching slots on
the control panel to ensure that User Interface
Board doesn't move and is rmly anchored.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
Disassembly
18 ©2012 Viking Preferred Service
Door Latch Interlock Removal
The door latch mechanism is secured to the
outer door panel by one T20 TORX screw.
With the control panel removed, remove the
screw.
Remove outer door panel, see Outer Door
Removal procedure, Page 15.
Remove control panel assy, see Control
Panel Removal procedure, Page 16.
If door latch has been removed the follow-
ing procedure should be used to install it for
proper alignment.
With control panel mounted to outer door
place door latch in it's proper position, then in-
stall T20 TORX into bottom of latch as shown
above in previous step. DO NOT TIGHTEN
this screw at this time. Install the two latch
screws into the upper latch mounts shown in
photo in next column. Snug these two screws
down all the way, don't overtighten. At this
time tighten the T20 TORX screw at bottom
of latch. These actions should ensure proper
latch alignment
Install these two screws
snuggly
Remove the two upper screws at this time, they
will be installed during the outer door panel as-
sembly to the inner door assembly.
Reassemble door by reversing procedures in
previous column.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
When replacing soap dispenser, a rubber lubricant is required to install the new dispenser,
part # 036641-000 (P80 emulsion), this should come with the new dispenser and should be
applied to seal before installation. Failure to use this lubricant could result in water leaks.
CAUTION!
Disassembly
©2012 Viking Preferred Service 19
Detergent Dispenser
Remove outer door panel, see Outer Door Removal procedure, Page 15.
To remove detergent dispenser bend tabs up to clear and release plastic dispenser assembly
while pushing in on dispenser, this will allow the dispenser to release and come out of the inner
door liner. See arrows below, there are metal tabs on all four sides of detergent dispenser.
Remove connector going to detergent dispenser.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!
CAUTION!
Disassembly
20 ©2012 Viking Preferred Service
Door Spring and Cable Assembly
The image below shows the right side door
hinge cable, spring, and pulley. The left side
is the same.
Make sure that when removing or
adjusting the door spring tension that
you are wearing protective gloves and
eye wear. Injury can occur should the
spring or cable come loose or slip during
assembly.
Below is a close-up view of the cable
wrapped around the pulley. As the door
opens or closes, the cable will ride along the
roller creating a smooth movement in the
door operation.
The image below shows the spring and the
channel it rides in. The connection is secured
in mounting holes in the channel frame.
The image below shows the spring in its
default location (sixth hole from the top).