Viking VUWC244DRSS User manual

SMR-0005
October 2010
Service
Manual
VUWC244DRSS & DLSS
VUWC244CRSS & CLSS
VUWC244FRSS & FLSS
DFUW244CR & CL
DFUW244FR & FL
This Base Manual covers general and
specific information including, but not
limited to the following models:
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.

Index
Section 1
Introduction to the Dual Zone 1
1.1 UnitSpecications     2
1.2 Installation Tips 3
1.3 Electrical Requirements 3
1.4 Interior Components 4
1.4.1 Wine Shelves 4
1.4.1.1 Removing 4
1.4.2 Lights 4
1.4.2.1 Replacing 4
Section 2
Dual Zone Characteristics 5
2.1 Introduction: TruProtect™ Control Features 6
2.1.1 TruProtect™ System 6
2.1.2 Initial Start Up 6
2.1.3 Turning Unit ON/OFF 6
2.1.4 Display Temperature 6
2.1.5 Setting the Display Temperature 7
2.1.6 Selecting˚F/˚C      7
2.1.7 Display Lighting 7
2.1.8 Show Room Lighting 7
2.1.9 Black Out Mode 8
2.1.10 Sabbath Mode 8
2.1.11 Door Alarm 8
2.1.12 High / Low Temperature Alarm 8
2.1.13 Power Failure Alarm 8
2.1.14 Reset Alarms 8
2.2 System Operation 9
2.3 Defrosts 9
2.4 Software 10
Section 3
Refrigeration System 11
3.1 BasicUnitConguration     12-13
3.2 Servicing 14
3.3 Basic Tools 14
3.4 R-134a       15
3.5 Sealed System 16
3.6 Low Side Leaks 16
3.7 High Side Leaks 16
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3.8 Restricted Capillary Tube 17
3.9 Access Valves 17
3.10 Refrigerant Recovery 18
3.11 Flushing the System 18
3.12 System Evacuation 19
3.12.1 Evacuating the Refrigerant 19
3.13 Charging the System 20
3.13.1 Alternate Method 21
3.14 Leak Testing 21
Section 4
TruProtect™Control Diagnostics 22
4.1 Diagnostics Mode 23
4.2 Error Codes 24
Section 5
Mechanical System Components 25
5.1 Access to Mechanical Base Plate 26
5.2 Compressor 27
5.2.1 Removal 27
5.2.2 Installation 28
5.3 Condenser 29
5.3.1 Removal 29
5.3.2 Installation 30
5.4 Evaporator 31
5.4.1 Removal 31
5.4.2 Installation 32
Section 6
Structural Components 33
6.1 Divider Assembly & Evaporator Cover 34
6.1.1 Removal 34
6.1.2 Installation 35
6.2 Handle-RemovalandAdjustments    36
6.3 Hinge–Adjust      36  
6.4 LevelingLegs -Adjust   36
Section 7
Electrical Components 37
7.1 Fans 38
7.1.1 Condenser Fan 38
7.1.1.1 Removal 38
7.1.1.2 Installation 39
7.1.2 Compartment Fan 39
7.1.2.1 Operation 39
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7.1.2.2 Replacing 40
7.1.3 Heater / Fan Assembly 40
7.1.3.1 Operation 40
7.1.3.2 Replacing 41
7.2 Thermistor 42
7.2.1 Checking Resistance 43
7.2.2 Replacing Upper Cable 44
7.2.3 Replacing Lower Cable 44
Section 8
Control Components 45
8.1 User Interface Board 46
8.1.1 Replacing 46
8.2 Main Power Board 47
8.2.1 Removal 48
8.2.2 Installation 48
Section 9
Wiring 49
9.1 Diagram 50
9.2 Communication Cable 51
9.3 Main Power Board 52
9.4 User Interface 53
Section 10
Reference Charts 54
10.1 Resistance Temperature Chart 55
10.2 Pressure-TemperatureChart     56
10.3 QuickReferenceSheet     57-58
Section 11
Trouble Shooting Guide 59
11.1 Problem/Cause/Correction    60-62
Section 12
Reference Photos 63
12.1 Upper Compartment 64
12.2 Lower Compartment 64
12.3 Cabinet Back 65
12.4 Cabinet Rear Corner 65
12.5 Front Grille 66
12.6 Cabinet Front Corner 66
12.7 Mechanical Assembly 67
12.8 Mechanical Assembly 67
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12.9 Compressor Electrical Cover 68
12.10 Compressor Relay / Overload / Capacitor 68
12.11 Mechanical Assembly – Top View 69
12.12 Mechanical Assembly – Front View 69
12.13 Inside Upper Compartment 70
12.14 Inside Lower Compartment 70
12.15 Inside (Top) of Upper Compartment 71
12.16 Inside (Top) of Lower Compartment 71
12.17 Bottom of Lower Compartment 72
12.18 Divider – Bottom Corner 72
12.19 CompartmentFans-InsideUpperCompartment  73
12.20 Divider Side and Rear Channels 73
12.21 MolexConnections-InsideUpperCompartment  74
12.22 MolexConnection-InsideLowerCompartment  74
12.23 Components of Upper Compartment 75
12.24 Compartment Fan Connections – Behind Cover 75
12.25 View of Components Behind Evaporator Cover 76
12.26 Divider Bottom – Return Air 77
12.27 Divider Installation 77
12.28 Handle with Stand Off 78
12.29 Handle Stand Off 78
12.30 Door Gasket and Magnet 79
12.31 Door Divider Seal 79
12.32 Door Hinge Assembly 80
12.33 Main Power Board Housing 81
12.34 Main Power Board Housing 81
12.35 User Interface Control Box 82
12.36 User Interface Board 82
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Section 1
Introduction
to
Dual Zone
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1.1 UnitSpecications
Model: VUWC244DRSS, DLSS, CRSS, CLSS, FRSS, FLSS
DFUW244CR, CL, FR, FL
Cabinet dimensions
Height: 33 ¾”
Width: 23 7/8”
Depth: 23 7/8”
Weight: 170 lbs
Electrical: 115 VAC / 60Hz
Power Cord Length: 7 foot
Refrigerant:  R-134a-3.25ounces
Temperature Control: Electronic – TruProtect™
Compressor: Hermetically sealed, 115 VAC, 438 BTU/HR, 1.5 Amp
Condenser Fan: 115 VAC, 2.3 Watts, 1300 RPM
Compartment Fans: (2) 12 VDC
Heater / Fans (2) 12 VDC
Serial Nameplate
How to read the above serial plate: 20090218001H
Left to right; 1st 4 digits: 2009 is the year built
5
th & 6th digit: 02 is the month built
7th and 8th digits: 18 is the day built
9
th, 10th, 11th digit: 001 is the sequential number built that day
12th digit: H is the assembly site.
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1.2 Installation Tips
Thisunitcanbeinstalledfreestandingorbuilt-in.Thefrontoftheunitmustbeunobstructed1) for proper air circulation and operation at all times
Area should be ventilated and without extreme temperatures.2) Unit must be installed indoors and away from the elements of nature. This unit is not U.L.3) approved for outdoor installation. If installed against these recommendations the warranty
will be void.
Unit must be installed on a level surface capable of supporting the loaded weight of the unit4) plus its contents.
If unit is installed freestanding insure that power cord is not in a position for tripping over or
5) accidental pulling.
Make sure that door is aligned at a right angle to cabinet top and securely fastened to hinge6) assembly.
Insure that door is properly closed and making contact with reed switch on the user interface7) control. The display will “black out” when the door is closed properly.
Check to insure that unit is cooling after installation is complete.8) Familiarize the customer with the product after installation is complete. Make sure they9) understand the functions of the control panel.
1.3 Electrical Requirements
Supply voltage to the unit is 115 VAC, 60 Hz, 1 phase.1) Power receptacle should be fed through a 15 amp, delayed action fuse or circuit breaker.2) Do
not fuse the neutral or ground side of the circuit.
This unit requires the use of a grounded outlet.3) It is recommended that a single circuit receptacle be used for this unit only.4) Do not use an
extension cord with this product.
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1.4 Interior Components
1.4.1 Wine Shelves
A total of six (6) glide out shelves with wine mats.
Includesve(5)wineshelves
Overall shelf dimensions are: 19 ¼” wide x 17” deep
Shelf capacity of 8 bottles each
Extends outward: 12” maximum
Includes one (1) Bottom wine shelf
Overall shelf dimensions are: 19 ¼” wide x 11” deep
Shelf capacity of 4 bottles
Extends outward: 6 ½” maximum
1.4.1.1 To Remove Shelves
1) Unload shelf
2) Pull forward until the shelf has reached its forward limit.
3)Pickfrontedgeofshelfupwardtowardsa45˚angle.
4) Pull shelf out away from slides
5) Reverse process to install
NOTE: Builtinunitsmustaccommodatea90˚dooropeningtofacilitateshelfextension.
CAUTION
1) Do not lean or press down heavily on the wine shelves. Doing so may damage the shelves.
2) It is also advisable not to pull more then one wine shelf out at a time.
3) Pull wine shelves out carefully to minimize unsettling of the wine collection.
1.4.2 Lights
Each compartment has a 115 volt interior light. The lights function utilizing a door magnet mounted on
the inside of the cabinet door. A reed switch located inside the User Interface control turns the lights on
and off with each door position.
The lights can also be operated using “Display Lighting” or “Show Room Lighting”. These functions are
controlled by the light keypad on the User Interface panel. Refer to Section 2, Paragraphs, 2.1.7 & 2.1.8
of this manual describing their use.
The interior lights come as an assembly piece which includes the bulb, mounting bracket, and electrical
plug.
1.4.2.1 To Replace the Light Assembly
1) Remove the top two shelves of the compartment to access the light assembly.
2) Disconnect the lights electrical plug where it plugs into the cabinet liner.
3)Removethetwohexheadscrewsthatfastenthextureinplace.
4) Remove and replace with new assembly.
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Section 2
Dual Zone
Characteristics
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2.1 Introduction: TruProtect™Control Features
2.1.1 TruProtect™ System
Vikings exclusive TruProtect™ refrigeration monitor governs the intuitive user interface panel. The Tru
Protect™ system informs you if the unit is not working properly through both visual and audible alarms.
Amessagecenterislocatedontherightsideoftheuserinterfaceover-lay.
TheTruProtect™Systemcanbeenabledordisabledbypressingandholdingthe“Set”keypadforve
(5) seconds, the audible alarm will sound three (3) times and the message center will display either a
green “on” (enabled) or amber “off” (disabled) icon.
2.1.2 Initial Start Up
Plug unit into a power receptacle. The display on the user interface panel should beep and an amber
powerfailurewillshowonthemessagecenter.Thisisnormalatinitialstart-upasthewinecellarwas
operated for quality checks at the factory.
Toclearthiscode,simplydepressthe“On/Off”keypadforve(5)secondstoturnthecontroloff.Press
the “On/Off” keypad once again to start the wine cellar with a fresh display.
Ifthewinecellarhasrecentlybeenstoredintemperatureexceeding99˚Fthedisplaywillonlyread
upto99˚F.Thiswillbeseenonlyifthethermistorstillsense’sthatextremetemperature.Thisisnota
concern, as soon as the wine cellar starts cooling the thermistors will display the compartments tempera-
tures as it cools.
2.1.3 Turning the Unit On & Off
Pressandholdthe“On/Off”keypadforve(5)secondstoturntheunitonandoff.
When “off” the display will be blank and the refrigeration system will be inoperative. The lights will
stillfunction,howevertheywilltime-outafter15minutesifthedoorisleftopenorthedisplaylighting
is on to prevent overheating.
2.1.4 Display Temperature
The temperature display for both the upper and lower compartments is located on the user interface
panel on the face of the control box inside the upper compartment.
Compartment temperature is displayed as actual “real time” temperatures. This is unique to competitive
modelsthatdisplayset-pointorlock-intemperatures.
Slight temperature variations are a normal characteristic of this wine cellar.
It is important to note that variations of display temperature will appear due to certain factors. A couple
of examples would be the amount of door openings, and length of time into either an “off” or “defrost”
cycle.
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It is also important to note that although the inside temperatures of the wine cellar may vary a few de-
grees that stored product will not be effected by small amounts of temperature change due to their mass.
2.1.5 Setting the Display Temperature
Toadjusttheset-pointtemperature,pressthe“Set”keypadonce.Theuserinterfaceboardwillbeeponce
and a “set” icon will appear in the upper compartment display. Once in the Set Mode use the “Warmer”
and “Colder” keypads to obtain the desired point.
Toadjustthelowercompartmentpressthe“Set”keypadasecondtime.Again,therewillbeanaudible
beep and the “set” icon will appear in the lower compartment display. Exit the “Set” Mode by using
eitheroneoftwomethods:Therstwouldbetopressthe“Set”keypadathirdtime,onceagaintheau-
dible alarm will sound and the user interface will return to display mode. The second method is to let the
SetMode“timeout”afterve(5)secondsofnokeypadactivityandreturnbacktodisplaymode.
2.1.6 SelectFahrenheit(˚F)orCentigrade(˚C)
ThedisplaytemperaturecanbechangedfromFahrenheittoCentigradebypressingthe˚F/˚Ckeypad
one time. An audible beep will sound with every keypad function.
2.1.7 Display Lighting
There are two interior lights located inside the wine cellar. Each compartment has its own dedicated
bulb. The normal operation is that the light bulbs turn on as the door is opened and off when the door is
closed.
The display lighting can be enabled by pressing the light keypad once. An audible alarm will sound
when activated and the light keypad will display a blue LED. Display lighting will stay on continuously.
2.1.8 Show Room Mode
Show room lighting is activated by pressing and holding the “On/Off” keypad simultaneous of perform-
ingaP-O-R(Power-on-Reset).P-O-Risdenedasmomentarilyinterruptingpowertotheunit.Thiscan
be accomplished by simply unplugging and plugging the unit back into the receptacle. Remember to
pressandholdthethe“On/Off”keypadatthesametimeastheP-O-R.
The compressor, condenser fan, compartment fans, heater/fans, and alarms are disabled during this
mode.Thefollowingfunctionswillremainenabled:thedisplayshowingthelastset-points,the“On”
icon in the message center, key tones, internal lights, set keypad, warmer/colder keypad, mode keypad,
light keypad, and the F/C keypad.
WhentheP-O-Rhasbeenpreformed,pressthelightkeypad,anaudiblebeepwillsound,andtheblue
LED on the light keypad will turn on.
The compartment lights will remain on for a maximum of 15 minutes. After 15 minutes the compartment
lightswilltime-outandshutoff.HowevertheblueLEDlightonthe
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keypad will remain lit as a reminder that Showroom Mode is still activated. To repeat the Show Room
Mode, simply open and close the doors momentarily to cycle the compartment lights on for another 15
minute period.
To escape from “Show Room” mode repeat the activation process.
2.1.9 Black Out Mode
This is an automatic function and simply means that when the door is closed, the display readouts and the
compartment lights turn off. Display lighting is the exception.
2.1.10 Sabbath Mode
ToactivatetheSabbathMode,pressandholdthe“Set”keypadwhilepressingthe˚F/Ckeypadfour(4)
timeswithinseven(7)seconds.Thedisplaywillash“SA”seven(7)timesbeforethedisplaysblackout.
The display, audible alarms, message center, and lights will be disabled at this time. Although in Sabbath
Mode,thewinecellarwillstilloperaterandomly.TheSabbathModeautomaticallytimes-outin72hours.
To exit the Sabbath Mode simply repeat the same procedure used to enable.
2.1.11 DoorAjarAlarm
When the TruProtect™ system is enabled an audible alarm will sound three (3) times every 30 seconds and
themessagecenterwilldisplayanamber“DoorAjar”alarm.
2.1.12 High/Low Temperature Alarm
When the TrueProtect™ system is enabled an audible alarm will sound six (6) times every minute and the
message center will display a red “Hi/Low Temp Upper” or a red “Hi/Low Temp Lower” alarm.
Itisanormalconditionifthealarmoccurswhenchangingset-pointsinexcessof10˚Fand/orhighusage.
2.1.13 Power Failure Alarm
When the Truprotect™ system is enabled the message center will display an amber “Power Failure” alarm
if power has been interrupted to the unit. No audible alarm is heard.
Thisisnormalatinitialstart-upasthewinecellarwasoperatedforqualitychecksatthefactory.
2.1.14 Reset Alarms
To reset the Door Alarm, simply close the door of the unit. For all other alarms press the “On/Off” keypad.
Although the alarms have been reset, the alarm will still resume if the condition has not been corrected.
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2.2 System Operation
Thedualzonewinecellarisdesignedwiththeintentofstoringandchillingofwines.Itisnotclassied
as a refrigerator and should not be utilized as such.
The dual zone wine cellar has two independent, temperature controlled zones. The temperature range for
eachzonehasanadjustableset-pointrangeof45˚Fto65˚F.Ideallytheseunitsshouldbesettooperate
withawarmerupperzoneforredwines(55˚F)whilemaintainingthelowerzoneatacoldertemperature
forwhitewines(45˚F).
The temperature shown on the user interface is displayed as “real time” temperature for each zone. This
is unlike competitive models. It is important that the customer realizes that during normal operation of
the wine cellar, the display will show slight variations. This is the result of temperatures monitored dur-
ing on/off cycles, calls for heat, and defrosts periods.
The evaporator is located behind the evaporator cover located on the back wall of the cabinet interior. A
sealed divider separates the upper and lower compartments. Each zone has an independent thermistor,
compartment fan, and heater / fan assembly.
The dual zone wine cellar utilizes a single refrigeration system.
Temperature control for each zone is achieved by tempering the air in each compartment. This is
achieved by cycling the compressor with compartment fans or the heater / fan assembly at intervals
when needed. The thermistor of each compartment monitors the need for either a call for cooling or the
call for heat. The signal is then sent to the User Interface board on the control panel.
When a call for heat is monitored, the compressor, condenser fan, and compartment fans will all be dis-
abled. A 10 minute delay will occur before a call for heating can be initiated in the same compartment,
unlesstheset-pointforthatcompartmenthasbeenchanged.Duringacallforheatcycle,thecompart-
ment fan is disabled during a simultaneous call for cooling in the other compartment
Acallforheatingwillonlyoccurifaset-pointissetat49˚Forabove.Acallforheatingcyclewillbe
terminatediftheset-pointischangedtoasettinglessthen49˚F.
2.3 Defrost
The dual zone wine cellar does not incorporate either an electric heater or hot gas method for defrost.
Depending on the software version (See following page), defrost is achieved by utilizing additional com-
pressor off time at the conclusion of a predetermined, accumulated run time period. These parameters
havebeenprogrammedintotheUserInterfaceboardandcannotbechangedorre-programmed.
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The latest software is version 1.9. This software version will incorporate an additional 30 minutes of
compressor “off time” when 5 hours of accumulated run time has been obtained. The defrost period will
initiate at the beginning of the next call for cooling. At this point the compressor remains off until the
conclusion of the 30 minute defrost period.
2.4 Software Versions
To determine the software version of the dual zone, enter into the diagnostics mode on the User Interface
board.
This is accomplished by pressing and holding the “Warmer” keypad while pressing the “Colder” keypad
four(4)timeswithinve(5)seconds.Thedisplaywillashboththesoftwareandrmwareversion.
To exit the diagnostics mode repeat the above process or let the User Interface time out of the mode after
ve(5)minutesofnokeypadfunctions.
Firm Ware Soft Ware Compressor off time Accumulated run time
1.0 1.5 20 Minutes 12 Hours
1.0 1.7 20 Minutes 5 Hours
1.0 1.8 25 Minutes 5 Hours
1.0 1.9 30 Minutes 5 Hours
NOTE: All part orders will receive software version 1.9
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Section 3
Refrigeration
Systems
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Front View w/o Door Side Section View w/o Door
Control User Interface
(See Detail Below)
Upper
Supply Air
Fan
Upper
Compartment
Lower
Compartment
Lower
Supply Air
Fan
Single
Cooling Coil
Note: Rear compartment cover
shown transparent for
visualization.
Lower Heater
Assembly
Upper Heater
Assembly
Upper
Return Air
Lower
Return Air
Compartment
Divider
Basic Unit Configuration
Machine
Compartment
Load Control
Housing
Thermoformed
Liner w/ Integral
Air Ducting
3.1BasicUnitConguration
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Side Section View
Machine
Compartment Load Control
Single
Cooling Coil
Compartment
Divider
Door to Divider Seal
(Dual-Durometer Extrusion)
Door
Divider
Door
Dual-Durometer Extrusion
(Door to Divider Seal)
3.1BasicUnitCongurationcont.
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3.2 Servicing
Always disconnect power to any Viking product before attempting to service.1)
CAUTION of electrical shock. 2) Never attempt any electrical repairs in damp or wet areas when
power is connected to the unit.
If the unit has been running, use CAUTION around the compressor, condenser, and connecting
3)
highsidetubing.Theseareasmaybehotandcapableofburningesh.
UseCAUTIONaroundthecondensernsandevaporatorns,alsoedgesaroundthebackpanel,4) rear cabinet edges, and the mechanical base plate. These areas are sharp and could result in minor
to severe cuts.
Refrigerant is under pressure. Never attempt to open a refrigeration system without properly
5) evacuating it.
Anyrefrigerant,R-12(CFC),R-22(HCFC),orR-134a(HFC),mustberecovered.Federal6) regulations prohibit the intentional venting or release of refrigerants during the repair or disposal
of an appliance.
Whenever possible it is best to perform all system repairs at the service center rather then the7)
customer’shome.
Alwayshaveproperventilationusingatorchwhendisconnectingsolderedjoints.Itisnotun-8)
commontohavesomeoilashwhenthecoppertubesareheatedandseparated.
Always wear protective safety glasses and gloves when working on any Viking product.9)
3.3 Basic Tools Needed for R-134a Service & Repair
Manifold gage1) Hoses with couplers2)
Certiedrefrigerantrecoverysystem3)
Chargingcylinderordial-a-charge4) Weight scale5) Access taps6) Brazing torch7) Vacuum pump8) Leak detector9) Small & large tubing cutters10) Swaging tools11)
Multi-meter12)
Standardhandtools(¼”nut-driver,5/16”nut-driver,3/8”nut-driver,slottedandPhillips13)
screwdriver,allenwrenches,combinationandadjustablewrenches,3/8”drivesocketset).
Rivet gun with assorted rivets14) Drill motor and assorted metal drill bits15)
Solderandux.16)
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3.4 R-134a
The following CAUTIONs should be read before proceeding
ThedualzonewinecoolerutilizedR-134arefrigerant.
R-134aandR-12arecompletelyincompatible.Extremecareshouldbetakentouseonlydedicated
equipment not only when evacuating and recharging the system but for all system repair.
With the possible exception of the vacuum pump, all service equipment that comes in contact with
R-134aduringevacuationandrechargingmustbededicated.Accordingly,R-134awillrequirea
dedicated charging cylinder, manifold gauge set, process tube adaptors, and hoses. Any residual mineral
oilorothertoolsusedforsystemrepairmustbecleanedthoroughlybeforeusingR-134a/Esteroil
systems.
CAUTION EsteroilissyntheticoilusedasalubricantinR-134asystems.Esteroilsincludevarious
types of additives for improving viscosity, and temperature sensitivity. These additives are often
aggressive and skin contact should be avoided.
It is important to note that Ester oil and mineral oil do not mix
IfavacuumpumpwithmineraloilisusedtoevacuateanR-134asystem,itisabsolutelyessentialto
haveashut-offvalvebetweenthepumpandthemanifoldgauge.Thehandvalvemustbeclosedduring
all times when the vacuum pump is not operating. This prevents the migration of mineral oil vapor into
theR-134a/Esteroilsystem.Ifthevacuumpumpshouldstopduringevacuation,thehandvalvemust
be closed immediately.
InsurethatallrefrigerationhosesarespeciedforusewithR-134arefrigerant.Researchhasshown
that compounds in standard refrigeration hoses may enter the sealed systems and eventually restrict the
capillary tube.
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