Viking Professional VDB200 User manual

Preferred Service
SMK-002
May, 2010
This manual is to be used by qualified appliance technicians only.
Viking does not assume any responsibility for property damage
or personal injury for improper service procedures done by an
unqualified person.
Service
Manual
Built-In
Dishwasher
This Base Manual covers general and
specific information including, but not
limited to the following models:
VDB200
10VPS4_VDB200_dishwasher.indd 1 5/28/10 11:11:09 AM

Table of Contents
2
© 2010 Viking Preferred Service
Description Page
Important Information ....................................................... 3
Safety Information ............................................................. 3
WARRANTY INFORMATION
Warranty Information......................................................... 4
Warranty Service Information ............................................ 5
GENERAL INFORMATION
Specifications .................................................................... 6
Dimensions........................................................................ 6
Warnings............................................................................ 7
Model–Serial Number Matrix ............................................ 9
OPERATION
Settings and Functions .................................................... 10
Control Operation ........................................................... 10
Wash Cycles .................................................................... 10
Pots/Pans....................................................................... 10
Normal Wash................................................................. 10
Econo/China.................................................................. 10
Rinse/Hold..................................................................... 10
Options............................................................................ 10
Hi Temp Wash ............................................................... 10
Delay Start..................................................................... 10
Audible Sound Signal.................................................... 10
Preparing Dishes ............................................................. 11
Before Operation ............................................................ 11
Option Restrictions.......................................................... 11
Changing a Program After the Unit Has Started ............. 11
Opening the Door After Cycle Has Started..................... 11
DIAGNOSTICS
Entering Diagnostic Mode .............................................. 12
Fail Codes........................................................................ 13
Parts Location–Control Board.......................................... 14
Control Board Test Points................................................ 15
Control Board Diagnostics .............................................. 16
Door Switch ................................................................... 16
Detergent Dispenser ..................................................... 16
Circulation Motor........................................................... 16
Fill Valve ........................................................................ 16
Drain Motor ................................................................... 17
Moisture Sensor............................................................. 17
Diverter.......................................................................... 17
Water Temperature Sensor............................................ 17
User Interface Port......................................................... 18
Water heater.................................................................. 19
SERVICE DIAGNOSTICS AND PROCEDURES
Parts Location–Door ....................................................... 20
Door Disassembly........................................................... 21
Outer Door Removal ..................................................... 21
Control Panel Removal.................................................. 22
Inner Door Components ...............................................22
Detergent Dispenser ..................................................... 23
Door Latch Interlock ...................................................... 23
Door Spring and Cable Assembly ................................. 24
Door Hinge Disassembly............................................... 25
Description Page
Parts Location–Interior..................................................... 26
Lower Spray Arm Removal ............................................27
Coarse Strainer Removal ............................................... 27
Fine Strainer Removal.................................................... 27
SERVICE DIAGNOSTICS AND PROCEDURES
Base Pan–Front View....................................................... 28
Base Cover Disassembly ................................................. 28
Parts Location–Base Unit Bottom View ........................... 29
Drain Motor Disassembly ................................................ 30
Wash Diverter Disassembly ............................................. 30
Circulation Motor Disassembly........................................ 31
Capacitor Disassembly .................................................... 32
Water Heater Disassembly .............................................. 32
Water Temperature Sensor Disassembly......................... 33
Fill Valve Disassembly...................................................... 33
Control Board Disassembly ............................................. 34
Troubleshooting Guide.................................................... 36
WIRING DIAGRAMS
Main Control Board and User Interface
Wiring Connections....................................................... 37

© 2010 Viking Preferred Service 3
Important Information
Safety Information
We have provided many important safety messages
throughout this manual and on the appliance.
ALWAYS read and obey all safety messages. This is
a safety alert symbol.
This symbol alerts personnel to hazards that can
kill or hurt you and others. All safety messages will
be preceded by a safety alert symbol and the word
“DANGER”, “WARNING” or “CAUTION”. These
words mean:
All safety messages will identify the hazard, tell
you how to reduce the chance of injury, and inform
you what can happen if the instructions are not
followed.
To locate an authorized service agent, call:
Viking Customer Service
Phone No. 1-888-845-4641
Address your written correspondence to:
Viking Preferred Service
1803 HWY 82 West
Greenwood, MS 38930
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 appliances. It is possible,
however, that during the lifetime of a product, service may be required. Products should be serviced only by
a qualified authorized service technician who is familiar with the safety procedures required to perform the
repair and is equipped with the proper tools, parts, testing instruments, and the appropriate service manual.
DANGER
Immediate hazards which WILL result in severe
personal injury or death.
Hazards or unsafe practices which COULD
result in severe personal injury or death.
CAUTION
Hazards or unsafe practices which COULD
result in minor personal injury, product or
property damage.
WARNING
WARNING
To avoid risk of serious injury or death,
repairs should not be attempted by
unauthorized personnel.
CAUTION
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.

© 2010 Viking Preferred Service
Warranty Information
4
Professional Series Built-In Dishwasher Warranty
One Year Full Warranty
Undercounter dishwashers and all of their component parts, except as detailed below*, are warranted to be free
from defective materials or workmanship in normal household use for a period of twelve (12) months from the date
of original retail purchase. Viking Range Corporation, warrantor, agrees to repair or replace, at its option, any part
which fails or is found to be defective during the warranty period.
*Painted and decorative items are warranted to be free from defective materials or workmanship for a period of
ninety (90) days from the date of original retail purchase. ANY DEFECTS MUST BE REPORTED TO THE SELLING
DEALER WITHIN NINETY (90) DAYS FROM DATE OF ORIGINAL RETAIL PURCHASE.
Five Year Limited Warranty
Any upper and/or lower nylon rack which rusts due to defective materials or workmanship and any electronic controls
which fail due to defective materials or workmanship in normal household use during the second through fifth year
from the date of original retail purchase will be repaired or replaced, free of charge for the part itself, with the owner
paying all other costs, including labor.
Any motor/pump assembly or water distribution system component as listed below which fails due to defective
materials or workmanship in normal household use during the second through fifth year from the date of original
retail purchase will be repaired or replaced, free of charge for the part itself, with the owner paying all other costs,
including labor.
Motor/Pump and Water Distribution System Components
Circulation motor/pump; Lower wash arm; Drain motor/pump; Tube to upper wash arm; Fill valve; Upper wash arm
Lifetime Limited Warranty
Any stainless steel tank or inner door liner which develops a water leak due to defective materials or workmanship
in normal household use during the lifetime of the product will be repaired or replaced, free of charge for the part
itself, with the owner paying all other costs, including labor.
Ninety (90) Day Residential Plus Warranty
This warranty applies to applications where use of the product extends beyond normal residential use. Examples
are, but not limited to, bed and breakfasts, fire stations, private clubs, churches, etc. This warranty excludes all
commercial locations such as restaurants, food service locations and institutional food service locations.
This warranty extends to the original purchaser of the product warranted hereunder and to each transferee owner
of the product during the term of the warranty.
This warranty shall apply to products purchased and located in the United States and Canada. Products must be
purchased in the country where service is requested. Warranty labor shall be performed by an authorized Viking
Range Corporation service agency or representative. Warranty shall not apply to damage resulting from abuse,
accident, natural disaster, loss of electrical power to the product for any reason, alteration, improper installation,
improper operation or repair or service to the product by anyone other than an authorized Viking Range
Corporation service agency or representative. Warranty shall not apply to damage resulting from indoor units
being used in outdoor situations. This warranty does not apply to commercial usage. This warranty does not
cover any food or medicine loss due to product failure. Warrantor is not responsible for consequential or
incidental damage whether arising out of breach of warranty, breach of contract, or otherwise. Some jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
Owner shall be responsible for proper installation, providing normal care and maintenance, providing proof of
purchase upon request, and making the appliance reasonably accessible for service. If the product or one of its
component parts contains a defect or malfunction during the warranty period, after a reasonable number of
attempts by the warrantor to remedy the defects or malfunctions, the owner is entitled to either a refund or
replacement of the product or its component part or parts. Replacement of a component part includes its free
installation. Warrantor’s liability on any claim of any kind, with respect to the goods or services covered hereunder,
shall in no case exceed the price of the goods or service or part there of which gives rise to the claim.
VIKING RANGE CORPORATION
111 Front Street, Greenwood, Mississippi (MS) 38930 USA
662-455-1200
For more product information, call 1-888-VIKING1 (845-4641), or visit our
web site at http://www.vikingrange.com

© 2010 Viking Preferred Service
Warranty Information
5
WARRANTY SERVICE
Under the terms of this warranty, service must be performed by a factory authorized Viking Range Corporation
service agent or representative. Service will be provided during normal business hours, and labor performed
at overtime or premium rates shall not be covered by this warranty. To obtain warranty service, contact the dealer
from whom the product was purchased, an authorized Viking Range Corporation service agent, or Viking Range
Corporation. Provide model and serial number and date of original purchase. For the name of your nearest
authorized Viking Range Corporation service agency, call the dealer from whom the product was purchased or
Viking Range Corporation. IMPORTANT: Retain proof of original purchase to establish warranty period.
The return of the Owner Registration Card is not a condition of warranty coverage. You should, however, return the
Owner Registration Card so that Viking Range Corporation can contact you should any question of safety arise which
could affect you.
Any implied warranties of merchantability and fitness applicable to the described halogen elements are limited
in duration to the period of coverage of the applicable express written limited warranties set forth above. Some
jurisdictions do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to
you. This warranty gives you specific legal rights, and you may also have other rights which may vary from jurisdiction
to jurisdiction.
VIKING RANGE CORPORATION
£££ÊÀÌÊ-ÌÀiiÌÊUÊÀiiÜ`]ÊÃÃÃÃ««ÊÎnÎäÊ1-
[phone]
www.vikingrange.com
Specification subject to change without notice.

© 2010 Viking Preferred Service 66
General InformationGeneral Information
Specifications*
Built-In Dishwasher
Description VDB200
Overall width 23-7/8” (60.6 cm)
Overall height 33-7/8” (86.0 cm) min. to 35” (89.0 cm) max.
Overall depth from rear
To edge of side—23-3/4” (60.3 cm)—includes door panel
With door open—49” (124.5 cm)
Cutout width 24” (61.0 cm)
Cutout height 34” (86.4 cm) min. to 35” (89.0 cm) max.
Cutout depth 24” (61.0 cm)
Electrical requirements 15.0 amps, 120 VAC/60 Hz; Power cord must be purchased separately
Water-heating element rating 1200 watts
Inlet water temperature 120°F (49°C) recommended;
Dishwasher will perform properly with cold water
Note: Cycle times will vary
Inlet water pressure operating range 10 to 125 psi (0.69 to 8.62 bar)
Inlet water hose 5’ (1.5 m) braided stainless steel water line with 3/8” (0.95 cm) compression fitting
connected to dishwasher
Drain hose 7’ (2.13 m) 1/2” (1.3 cm) ID “crimp-proof” flexible drain hose attached to dishwasher,
connections provided for 5/8” (1.6 cm), 3/4” (1.9 cm) or 1” (2.5 cm), cut as required
Drain hose high loop required Height from floor—20” (51.0 cm) min.
Approximate shipping weight 147 lbs.
(66.7 kg)
*Go to vikingrange.com for the latest specifications.
Dimensions
23-7/8”
(60.6 cm)
49”
(124.5 cm)
28-3/4”
(73.0 cm)
23-3/4”
(60.32 cm)
26-3/8”
(67.0 cm)
33-7/8”
(86.0 cm) min.
to
35”
(89.0 cm) max.

© 2010 Viking Preferred Service 77
General Information
Warnings
Read and follow all instructions before using this
appliance to prevent the potential risk of fire,
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
qualified technician. DO NOT attempt to adjust,
repair, service, or replace any part of your appliance
unless it is specifically recommended in this manual.
All other servicing should be referred to a qualified
servicer.
Water Supply
UÊ Ê7>ÌiÀÊ«ÀiÃÃÕÀiÊvÀÊÌiÊÜ>ÌiÀÊÃÕ««ÞÊÃÕ`ÊLiÊ
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
fitting connected to dishwasher.
UÊÊ ÊvÌiÀÊ`iÌiÀ}ÊÜiÀiÊÌiÊÜ>ÌiÀÊÃÕ««ÞÊiÊ
will connect to the dishwasher, provide a 2”
(5.1 cm) access hole and run the water supply
line to the approximate fill valve location.
UÊÊ ÊÀÊÃiÀÛViÊVÛiiVi]Ê>ÊÃÕÌvvÊÛ>ÛiÊÌÊ
supplied) should be installed in the supply line
in a readily accessible location (such as beneath
the sink).
UÊÊ ÊÌÊÃÊÀiVi`i`ÊÌ>ÌÊÌiÊ`ÃÜ>ÃiÀÊLiÊ
connected to a hot water supply. If a cold water
supply is used, cycle times will vary.
UÊÊ ÊÌÊÃÊ«ÀÌ>ÌÊÌ>ÌÊÌiÊÜ>ÌiÀÊÃÕ««ÞÊiÊ>`Ê
the shut-off valve have a sufficient flow volume.
Flush the supply line prior to connecting it to
the intake line of the dishwasher.
Drain
UÊÊ Ê/iÊ>VViÃÃÊiÊvÀÊÌiÊ`À>ÊiÊÃÕ`ÊLiÊ
2” square (5.1 cm). Locate as low and as near to
the back wall as possible.
UÊÊ ÊDO NOT use any fittings anywhere in the drain
line that are less than 1/2” (1.3 cm) ID.
UÊÊ ÊvÊÌiÊ`À>ÊiÊÃÊ}}ÊÌÊLiÊViVÌi`ÊÌÊ
a food waste disposer, be sure to remove
the knockout or plug from the fitting before
connecting drain line.
UÊÊ ÊÀ>ÊViVÌÊÃÕ`ÊLiÊ>ÊÕÊvÊ»Ê
(22.9 cm) from the floor. If connection is lower,
siphoning during cycle can occur.
Electrical Connections
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.
General Information
WARNING
Plumbing connections must comply with
applicable sanitary, safety, and plumbing codes.
WARNING
The dishwasher has a factory installed back-
flow preventer. DO NOT add an additional
check valve .
WARNING
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.
WARNING
Improper connection of the equipment –
grounding conductor can result in a risk of
electric shock. Check with a qualified 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 fit the outlet,
have a proper outlet installed by a qualified
electrician.

© 2010 Viking Preferred Service 88
General Information
Warnings
WARNING
EXCESSIVE WEIGHT HAZARD
Use two or more people to move dishwasher.
Failure to do so can result in back or other
injury.
General Information
WARNING
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, fire or electrical shock.
WARNING
TIP OVER HAZARD
DO NOT push down on open door. Doing so
can result in serious injury or cuts.

© 2010 Viking Preferred Service 99
General Information
MODEL VDB200SS
120V 60Hz OPER 12.2A
2.5A
OTHER 15.5A
SERIAL NO 011910D00011595
HOUSEHOLD DISHWASHER
VIKING RANGE
CORPORATION
GREENWOOD, MISSISSIPPI
38930 USA
Made in the USA
®
E
CSA
LISTED
3HV V
UL
CUS
01 3597 000
Serial Number
Month
Day
Year of Manufacture
01 10 10 D00011595
General Information
Model–Serial Number Matrix
The serial number and model number for your
appliance are located on the identification plate
mounted on the inside of the unit.
Model Numbers
Serial Numbers
VDB200SS
V=Viking Professional Series
D=Dishwasher
B=Built-In
Version
SS=Stainless

© 2010 Viking Preferred Service 10
Operation
Settings and Functions
Wash Cycles
Pots/Pans
Heavily soiled pots, pans and casserole dishes. Long
heated pre-wash loosens up encrusted food. High
temperature main wash and final rinse.
Normal Wash
Normally soiled plates, glasses, bowls, and lightly
soiled pots and pans.
Econo/China
Normally soiled dishware, china and crystal. Lower
temperature wash cycle.
Rinse/Hold
All dishware. Short rinse with no heat.
Options
Hi Temp Wash
Increases the temperature of the main wash and
final rinse portions of the cycle. May add extra
water for improved cleaning performance. Available
on Pots/Pans and Normal cycles.
Delay Start
Lets you delay running the dishwasher for up
to four 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 four-hour 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.
Audible Sound Signal
A single beep will occur when you select cycles,
options and press the “START” key. The end-of-
cycle signal consists of two long beeps. If the
“START” button is not pressed or if the door is not
closed within four seconds of pressing the “START”
button, three short beeps will occur. For all other
error messages and to deselect the audible sound
signal, see Troubleshooting Guide, (page 36).
Control Operation
The following is the basic layout of the control panel and how it is referenced below.
Cycles OptionsStart Key

© 2010 Viking Preferred Service 11
Operation
Settings and Functions
Preparing Dishes
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.
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 flatware. 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.
2. Make sure there is rinse agent in the dispenser.
Add rinse agent if needed.
3. Add proper amount of detergent and pre-wash.
4. Select the desired cycle and option(s).
5. Push both top and bottom racks in.
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:
UÊ Ê/iÊ«ÌÊÊ/*Ê7-ÊÃÊÌÊ>Û>>LiÊÊ
the ECONO/CHINA cycle.
UÊÊ Ê Ê«ÌÃÊ>ÀiÊ>Û>>LiÊÊÌiÊ, -É"Ê
cycle.
After selecting the wash cycle and options, depress
“START” button. The START symbol will illuminate.
This merely means the machine is ready. Close door
securely within four seconds of pressing the START
button.
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 the Door After Cycle Has Started
If the door is opened after the cycle has started,
the START button will flash to indicate that the
dishwasher is in Standby mode. Press the “START”
button and close the door securely within four
seconds to restart the cycle. If a cycle is canceled,
the dishwasher will drain any remaining water in
the unit out.

© 2010 Viking Preferred Service 12
Service Diagnostics and Procedures
Entering Diagnostic Mode
To enter the Diagnostic mode, press the left most program button five times and then immediately press the
“START” button.
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.
1. Drains for 85 Seconds.
5 Seconds On–5 Seconds Off–30 Seconds On–5 Seconds Off–40 Seconds On
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 (filter clean) for 10 seconds.
9. Drains for 85 Seconds.
5 Seconds On–5 Seconds Off–30 Seconds On–5 Seconds Off–40 Seconds On
10. 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 finished.
Note: During this test cycle, if the control board senses a failure that it is programmed to monitor, it
will display an error code.
1
2

© 2010 Viking Preferred Service 13
Service Diagnostics and Procedures
Fail Codes
Flash
Pots/Pans Normal Wash
Fault Action
1 1 Pan Moisture Sensor
Disconnected
Verify pan moisture sensor is connected, verify
moisture sensor resistance.
1 4 Diverter Time-out Verify diverter resistance and wiring.
1 5 Drain Error Verify drain is free and clear of obstructions, verify
dishwasher is level, check drain pump resistance,
check drain pump for obstructions.
Check disposer for plug.
2 2 Fill Time-out Verify water pressure, verify inlet hose is not
restricted, water valve is not restricted.
3 1 UI-MC Communication Error Check connector between UI and Relay Board.
3 3 Drain Pump Error Check drain pump resistance, check drain pump for
obstructions.
5 5 Internal Error Press and hold start button for
four seconds. If it repeats, replace controls.
1 2 Motor Control Status Error Check wires between control board and motor
Check wires between motor and start capacitor
Check for rotor turning freely and check winding
resistances
Check control
Check capacitor
3 2 Pump Flow Error 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. Could be defective wash motor
10. Could be defective water inlet valve
11. Could be defective main control
4 1 Temperature Sensor Error Check connections. Check for 47k Ω ohms at ambient.
4 2 Wash Heater Error Check wiring to element. Check for 12 Ω ohms.
4 3 Dispenser Error Check connections. Check for 8.3 Ω ohms.
4 4 Inlet Valve Error Check connections. Check for 1.1k Ω ohms.
5 4 Current Sense Error 1. Could be defective main control
2. Could be defective wire harness
See Note A Pan Moisture
Check the base pan for water. Check for 175k Ω ohms.
See Note B Power Loss Reset and test.
Note A: Both lights flash continuously.
Note B: All lights, except START and RUN (select models), flash continuously.
Note C: To reset unit, press and hold the “START” button for four seconds.
Note D: Numbers listed indicate the times the lights will flash when a specific error is detected.
(For example: For a drain error, the POTS/PANS light will flash once and the NORMAL WASH
light will flash five times.)
10VPS4_VDB200_dishwasher.indd 13 5/28/10 10:59:03 AM

© 2010 Viking Preferred Service 14
Service Diagnostics and Procedures
Parts Location–Control Board
(P12)
Water
Heater
(P6)
Water Valve,
Drain Pump,
Diverter
(P5)
Wash Motor
(P9)
User Interface
Port
(P8)
Moisture Sensor,
Temperature
Sensor
(P10)
Water Valve,
Drain Pump
(P4)
Door Switch, Dispenser

© 2010 Viking Preferred Service 15
Service Diagnostics and Procedures
Control Board Test Points
The unit has a control board that controls the functions of the dishwasher. Components can be diagnosed via
the control board. With the control board accessed (see Control Board Disassembly procedure, page 34), the
following can be measured:
Component Control Board Test Point Readings (Typical)
Door Switch P4-1 (Yellow) – P4-2 (RD/WH) 0 Ωdoor closed
∞Ωdoor open
Dispenser P4-1 – P4-4 8.3 Ω
Wash Motor P5-1 (Red) – P5-2 (White) 6.3 Ω
Water Valve P6-3 (Blue) – P10-1 (White) 1.1K Ω
Drain Pump P6-4 (Brown) – P10-1 (White) 15.1 Ω
Diverter P6-2 (Gray) – P10-1 (White) 2.7K Ω
Moisture Sensor P8-1 (Red/White) – P8-2 (Purple) 175K Ω
Temperature Sensor P8-3 (Black/White) – P8-4 (Blue) 47K Ω@ 77˚ (varies based on temp)
Water Heater P12 (Gray) – P10-1 (White) 12.00 Ω

© 2010 Viking Preferred Service 16
Service Diagnostics and Procedures
With the control board removed (see Control Board
Disassembly procedure, page 34), the following
components can be diagnosed without removal of
the components:
Door Switch
The door interlock switch controls 12 VDC to the
control board. When the door is open, the contact
opens and the board stops the operation. To check
the switch, unplug the molex connector and check
for continuity between P4-1 (red/white) and P4-2
(yellow). With the door closed, the reading should
be 0 Ωohms. Open the door and the reading
should be infinity (∞). If the readings are incorrect,
check the wiring to the door switch and inspect the
door switch.
Detergent Dispenser
The dishwasher uses a detergent dispenser to
release detergent into the tub. As voltage is
applied, the latch mechanism releases the dispenser
door allowing detergent to enter the tub. Voltage
between P4-1 and P4-4 should be 12 VDC when the
dispenser is activated. If no voltage is measured,
verify wiring.
Note: Testing the soap cup can be achieved in the
diagnostic mode.
Circulation Motor
The 200 Series Dishwasher uses a single speed,
capacitor assist wash motor. Voltage between P5-1 and
P5-2 should be 120 VAC when the motor is activated.
If voltage is not present, verify wiring. If voltage is
present and the motor is not running, check the
capacitor and motor windings for proper readings.
Note: Testing the circulation motor can be
achieved in the diagnostic mode.
Fill Valve
The dishwasher uses a fill valve to fill the machine
with water. Verify as the valve is energized 120 VAC
is present between P6-3 and P10-1. If voltage is
present and no water enters, check the water supply
and shut off valve to make sure water is being
supplied to the unit. If water is present, unplug the
wires to the fill valve and using an ohmmeter, check
for approximately 1.1k Ωohms at the coil. If
0 Ωohms are read, replace the fill valve (see Fill
Valve Disassembly procedure, page 33).
Note: Testing the fill valve can be achieved in the
diagnostic mode.
P-4
P-4
P-6
P-10
P-6
P-10
P-5
P-5
P-4
P-4
Control Board Diagnosis ( Some measurements require power and others require the unit not to be powered.)

© 2010 Viking Preferred Service 17
Service Diagnostics and Procedures
Drain Motor
The dishwasher uses a drain motor to remove water
from the tub at timed intervals during the wash
cycle. In the drain mode, voltage between P6-4 and
neutral should be 120 VAC. If voltage is measured,
unplug the wires to the drain motor and using an
ohmmeter, check for approximately 15.1 Ωohms
at the valve. If 0 Ωohms are read, replace the drain
pump. If readings are correct, remove pump and
check for obstructions in the drain pump (see Drain
Motor Disassembly procedure, page 30).
Note: Testing the drain motor can be achieved in
the diagnostic mode.
Moisture Sensor
The dishwasher uses a moisture sensor that is
mounted in the base pan of the dishwasher. Any
moisture that comes in contact with the sensor
will cause the unit to stop filling, operate the drain
pump, and signal an error code. If the sensor is
open, an open fail code will signal (see Fail Codes,
page 13). Resistance between P8-1 and P8-2 should
be 175K Ωohms.
Wash Diverter
The dishwasher uses a wash diverter to divert water
to either the upper arm or lower arm during the
wash cycle. This allows for low water consumption
and a better wash to both upper and lower racks.
At the beginning of each wash cycle, the control
board positions the wash diverter to its proper
starting position. It is monitored by a built in
monitoring switch that sends 120 VAC back to
P6-5. Depending on how long the switch is closed
determines what position it is in.
To check the wash diverter, check the motor with
an ohmmeter between P6-2 and Neutral. It should
read approximately 2.7k Ωohms. If readings are
incorrect, verify wiring connections to the diverter.
If the wiring is proper, replace the wash diverter
(see Wash Diverter Disassembly procedure,
page 30).
Note: If the diverter does not position itself, a
Diverter time out error will display (see Fail Codes,
page 13).
P-6
P-10
P-6
P-10
P-6
P-10
P-6
P-10
P-8
P-8
Control Board Diagnosis ( Some measurements require power and others require the unit not to be powered.)

© 2010 Viking Preferred Service 18
Service Diagnostics and Procedures
Control Board Diagnosis ( Some measurements require power and others require the unit not to be powered.)
Water Temperature Sensor
The dishwasher uses a water temperature sensor
that is mounted in the sump of the dishwasher. It is
an N.T.C (Negative Temperature Coefficient). As
the temp of the water rises, the resistance drops
(and vice-versa).
In the 200 Series dishwasher, it also serves as
a water input sensor as well. During a fill cycle,
an increase or decrease in water temperature is
monitored by the control board. This temperate
change due to incoming water temperature
fluctuations is realized by the board as water
entering the machine. If no change in temperature
is recorded, a FILL error code will be displayed.
If the senor is open, an OPEN fail code will signal
(Refer to page 13 for fail codes).
The control board monitors P8-3 – P8-4. Resistance
should be 47K Ω@ 77˚. If no resistance is found,
check wiring. If wiring is OK, replacement of the
sensor is necessary.
User Interface Port
The user interface allows the end consumer to make
cycle selections. As the selection is made, the signal
is sent to the control board via a ribbon connection.
Voltage between P9-1 and P9-2 should be 12 VDC.
If no voltage is found, check ribbon connector. If
connector is OK, replacement of the user interface
is necessary (see Control Panel Removal procedure,
page 22).
User Interface Board
P-8
P-8
P-9
P-9

© 2010 Viking Preferred Service 19
Service Diagnostics and Procedures
Water Heater
The unit uses a 120-volt, 1200 watt heater to heat
the water during the wash cycle. To check the
heater, unplug the gray wire on P12 and using an
ohmmeter, check for 12 Ωohms between the gray
wire and Neutral. If 0 Ωohms are read, check the
wiring to the heater. If the wiring is correct, replace
the heater. The heater can also be tested in the
Diagnostic mode (see page 12).
P-10
P-12
P-10
P-12
Control Board Diagnosis ( Some measurements require power and others require the unit not to be powered.)

© 2010 Viking Preferred Service 20
Service Diagnostics and Procedures
Parts Location–Door
Outer Door Door Spring
Assembly
Hinge
Control Panel
Door Latch Interlock
Inside View Side View
Center
Door Panel
Detergent
Dispenser