SMR-0003 - Service Manual
Service
Manual
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.
2008 24 Inch
Undercounter
Refrigeration
This Base Manual covers general and
specific information including, but not
limited to the following models:
DFRD144
DFUR143
DFUR144
DFUW144
DUAR143
DUAR144
DURD144
DUWC144
VUAR143
VUAR144
VURD144
VUWC144
SMR-0003
July 2008
Important Information
Important Notices for Service Technicians
Viking Range Corporation will not be responsible for personal injury or property damage arising from service
performed by anyone other than Viking Factory Authorized Service Agencies. 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 qualified service technician who 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 information.
IT IS THE TECHNICIANS RESPONSIBILITY TO REVIEW ALL APPROPRIATE SERVICE INFORMATION BEFORE
BEGINNING REPAIRS.
All safety information must be followed as provided in this document
To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power
before servicing unless testing requires power.
IMPORTANT: Wires removed during disassembly must be replaced on correct terminals to ensure proper
grounding and polarization.
Contact Information:
For authorized technical assistance:
Viking Technical Service
1-800-914-4799
Safety Symbols
Recognize these Safety Symbols, Words, and Labels:
DANGER-Immediate hazards which WILL result in
severe personal injury or death.
WARNING-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.
2
SMR-0003
© Viking Range Corporation
Table of Contents
Important Information����������������������������������������������������� 2
Important Notices for Service Technicians����������������� 2
General Information������������������������������������������������������� 4
Unit Specifications������������������������������������������������������ 4
Wine Cellar, Beverage Center & Refrigerated Drawers
Unit Specifications������������������������������������������������������ 4
Serial Nameplate�������������������������������������������������������� 4
Before Servicing��������������������������������������������������������� 4
Basic Refrigeration Tools������������������������������������������� 5
Installation������������������������������������������������������������������ 5
Electrical Requirements��������������������������������������������� 5
Sealed System Basics����������������������������������������������� 5
Diagnostic Information��������������������������������������������������� 6
Low Side leaks����������������������������������������������������������� 6
High Side Leaks��������������������������������������������������������� 6
Restricted Capillary Tube������������������������������������������� 6
Access Valves������������������������������������������������������������ 6
Evaporator Frost Pattern�������������������������������������������� 6
Pressure and Temperature����������������������������������������� 6
Temperature-Pressure Chart for R-134a�������������������� 6
Re-charging���������������������������������������������������������������� 7
Condenser������������������������������������������������������������������ 7
Compressor���������������������������������������������������������������� 7
Evaporator������������������������������������������������������������������ 8
Thermistors���������������������������������������������������������������� 9
Resistance versus Temperature Chart����������������������� 9
User Interface Panel and Tru Protect™ System������ 10
Starting the Unit������������������������������������������������������� 10
Setting the Temperature Mode��������������������������������� 10
Adjusting the Temperature Control��������������������������� 10
Interior Light and Switch������������������������������������������� 10
Sabbath Mode���������������������������������������������������������� 10
Warning Alarm���������������������������������������������������������� 11
Resetting the Alarms������������������������������������������������ 11
Show Room Mode���������������������������������������������������� 11
Error Code Detection����������������������������������������������� 11
Error Code Detection Reference������������������������������ 11
Service Diagnostics Mode���������������������������������������� 12
Software Model Number������������������������������������������ 12
Available Component Tests�������������������������������������� 12
Ordering Parts���������������������������������������������������������� 12
© Viking Range Corporation
Troubleshooting Procedures���������������������������������������� 13
Component Testing Procedures����������������������������������� 16
Disassembly����������������������������������������������������������������� 19
Mechanical Baseplate:��������������������������������������������� 19
Compressor�������������������������������������������������������������� 20
Condenser���������������������������������������������������������������� 21
Condenser Fan�������������������������������������������������������� 21
Thermistors�������������������������������������������������������������� 21
Lights������������������������������������������������������������������������ 21
Wiring Diagrams and Schematics�������������������������������� 23
Wine Cellar Wiring Schematic���������������������������������� 23
Beverage Center Wiring Schematic������������������������� 24
Refrigerated Drawer Wiring Schematic�������������������� 25
SMR-0003
3
General Information
Unit Specifications
The unit specifications will vary among the models listed in this service manual. See chart below for unit
specifications related to the model that you are servicing.
Wine Cellar, Beverage Center & Refrigerated Drawers Unit Specifications
Cabinet Dimensions (in)
Model
Weight
(lbs)
Refrigerant
Charge
(oz)
Height
Width
Depth
DFUW144
DUWC144
VUWC144
34
23 ⅝
24 ¼
166
2.8
DFUR143/144
DUAR143/144
VUAR143/144
34
23 ⅝
24 ¼
166
3.6
DFRD144
DURD144
VURD144
34
23 ⅞
24 ¼
170
3.6
Power
Cord
Length
(ft)
7
Compressor
Type
System
Refrigerant
Control
Temperature
Control
Condenser
Fan Motor
Evaporator
Fan Motor
Piston type
Capillary
tube
Electronic Control
with LED display,
thermistor input,
and Tru Protect™
2.3 W 1300
RPM
12VDC
Serial Nameplate
The serial nameplate is located inside of the unit on the upper left hand wall. The serial number will need to be given
when inquiring about the unit or ordering parts. See illustration below for a sample serial tag with manufacturing date
code logic.
VIKING RANGE CORPORATION
GREENWOOD, MISSISSIPPI 38930 USA
MODEL NO.
SERIAL NO.
"C"
HZ "D" PH "E" BTU/HR
R134A "H" OZ
•
•
•
•
4
YYYYMMDDSSSA
AMPS "G"
YEAR
ASSEMBLY SITE
MONTH
"J" PSI LOW SIDE
"K" PSI HIGH SIDE
DAY
SERIAL
A
B
C
D
E
F
G
H
J
K
DFUW, DUWC, VUWC 144
Detail B
115
60
1
440
3.3
2.8
140
300
DFUR, DUAR, VUAR 143/144
DFRD, DURD, VURD 144
Detail B
115
60
1
440
3.3
3.6
140
300
Before Servicing
•
"F"
TEST PRESSURE
DETAIL "B"
LISTED
DETAIL "B"
"A"
VOLTS
C
905L
HOUSEHOLD
REFRIGERATOR
Always disconnect power to any Viking product
before attempting to service it. Always verify that
power has been disconnected.
If the unit has been running, use caution around the
condenser and copper tubing. These areas may be
very hot.
Use caution around the condenser fins and
baseplate edges. These areas are sharp.
Refrigerant is under high pressure. Always evacuate
any system before attempting to open it.
Reasonable care and safe work methods should
be practiced when working on any Viking product.
Never work with energized electrical equipment in
wet or damp areas.
•
•
•
SMR-0003
Use an appropriate work area and location when
performing repairs. You will find that it is easier to
repair undercounter units if they are set on a raised
platform or workbench.
Always wear protective safety glasses and gloves
when working on any Viking product.
Any refrigerant, whether CFC, HCFC, or HFC (R-12,
R-22, or R-134a), must be recovered. Federal
regulations prohibit the intentional venting or release
of refrigerants during the service repair or disposal
of an appliance.
© Viking Range Corporation
General Information
Basic Refrigeration Tools
The following list contains some of the tools required for
basic refrigeration repairs:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Hoses with R-134a couplers (must meet standards
for handling R-134a refrigerant)
Approved and certified recovery system for R-134a
Manifold gauge set for R-134a
Charging cylinder with R-134a
Weight scale (preferably in ounces to the nearest
tenth of an ounce)
Access valves
Small and large tubing cutter
Brazing torch
Swaging tools
Multimeter
Leak detection equipment for detection of R-134a
Standard hand tools (assorted Phillips and standard
screwdrivers, sockets, Allen wrenches, adjustable
wrenches, etc.)
Rivet gun and assorted rivets
Drill motor and assorted metal drills
Installation
•
•
•
•
Unit can be installed freestanding or built-in. The
front of the unit must be unobstructed for proper air
circulation and operation at all times.
Area should be ventilated and without extreme
temperatures.
Unit must be installed away from the elements of
nature. Do NOT use the unit outdoors unless it is
U.L. approved for outdoor use; doing so may void
any warranties.
Unit must be on a LEVEL surface capable of
supporting the loaded weight of the unit.
Sealed System Basics
The following should always be practiced with any
sealed system that has been opened. ONLY OPEN
THE SEALED SYSTEM AS A LAST RESORT AND
AS A FINAL DIAGNOSIS. Always check other areas of
operation such as wiring, airflow, thermostat, etc. before
opening up the sealed system. Many times these areas
can resemble sealed system problems. The diagnosis
of a sealed system can be determined by accurate
pressure and temperature measurements. Also,
checking the evaporator frost pattern is a great way to
tell if a charge is adequate within a system.
1. Use a leak detection system that will detect R-134a
refrigerant. Leaks need to be found on any leaking
system BEFORE the repair takes place.
2. The drier must be replaced anytime the sealed
system is opened. Always use a new drier. Failure
to do so may cause repeated system failure in the
future.
3. Limit time the system is opened. DO NOT EXPOSE
THE OPEN SYSTEM FOR MORE THAN 15
MINUTES. This will result in sealed system failure.
Leave replacement parts sealed and/or pressurized
until ready to install.
4. The compressor must be replaced if there is a low
side leak. Moisture has been drawn into the system
if the unit has been running for an extended period
of time. Be sure to flush the system with dry nitrogen
gas and evacuate to 50 microns before re-charging
(see Low Side Leaks).
5. A new evaporator assembly must be ordered if the
capillary tube is found to be plugged or severely
restricted. Restrictions cannot be flushed out.
6. Be sure to purge the system with dry nitrogen gas
after final brazing. This will flush out any air or
moisture that may have entered the system before
being absorbed into the ester oil.
ELECTRICAL SHOCK HAZARD-Failure to follow
these requirements could result in personal injury,
electrical shock, or fire.
Electrical Requirements
•
•
•
•
115 VAC, 60 Hz., single phase power is needed
Use an outlet with a 15 amp delayed action fuse
or circuit breaker. DO NOT PUT A FUSE ON THE
NEUTRAL OR GROUND OF THE CIRCUIT.
Properly grounded outlet is required for this unit.
It is recommended that a single circuit receptacle
be used for this unit only. DO NOT USE AN
EXTENSION CORD.
© Viking Range Corporation
SMR-0003
5
Diagnostic Information
Low Side leaks
Low side leaks consist of a break in the system at the
evaporator, low side (suction) return line, or accumulator.
If a leak is found in any of these areas, moisture has
probably entered the system. The compressor and drier
will have to be replaced and the system will need to be
flushed thoroughly with nitrogen gas and evacuated to
50 microns before re-charging.
High Side Leaks
High side leaks consist of a break in the system at the
condenser, high side tubing, drier, or capillary tube. If a
leak is found in any of these areas, the system can be
flushed with nitrogen gas, evacuated to 50 microns, and
re-charged.
Restricted Capillary Tube
Moisture or other contaminants that enter the system
can cause deposits in the system. These deposits will
usually collect in the capillary tube and form a restriction
that cannot be completely removed by flushing. If the
capillary tube is found to be restricted, the evaporator,
compressor, condenser, and drier should all be replaced.
Pressure and Temperature
There are two ways to measure temperature of the
evaporator plate:
1. Use a thermocouple to measure the temperature of
evaporator plate. Thermocouple must be secured to
the evaporator when taking the measurement.
2. If there is proper contact between the thermistor and
evaporator plate, thermistor resistance value can be
corresponded to the temperature (See Thermistors).
NOTE: Temperature and pressure readings must
be taken while unit is running. Use gauge
pressure readings from the compressor’s
process tube (low side) access valve.
Pressure will vary depending upon the ambient
temperature and current stage of operation for the unit.
For example, the unit will have pressure between 0 and
5 psi just before entering the off cycle. Normal running
pressures on the low side will average 5 to 10 lbs.
Temperature-Pressure Chart for R-134a
Degrees F
Pressure (psi)
R-134a
Degrees F
Pressure (psi)
R-134a
-12
1.1
36
31.3
-8
2.8
38
33.2
-4
4.5
40
35.1
0
6.5
42
37.0
2
7.5
44
39.1
4
8.5
46
41.1
6
9.6
48
43.3
Access Valves
A temporary access valve can be used to service or
evaluate the system. From these access valves, you
can evacuate, charge, and recover the system. The
access valve can be installed on the compressor’s
process tube (this will also be a low pressure side). Be
sure to cap off access valve while servicing. This will
prevent contamination of the system and/or refrigerant
from leaking. After servicing, the access valve should
be removed. A pinch-off tool can be used to close the
system to remove the access valve and then braze the
hole for the access valve to seal the system. Be sure to
leak check after brazing.
Evaporator Frost Pattern
Checking the evaporator frost pattern is a good way
to quickly diagnose simple sealed system problems.
This can be done by allowing the unit to run (at least 10
minutes) with the door open for at least 5 minutes. This
will help speed up the normal frosting of the evaporator
plate. By visually inspecting the evaporator and feeling
it with your hands, you will see and feel frost across the
plate. It is absolutely necessary for the frost to cover the
entire evaporator plate. This will ensure the system has
been charged to its specified amount or does not have
a leak. A partial frost pattern may lead to excessive run
times or even 100% run mode. This is because the frost
does not reach the area of the evaporator thermistor, so
it does not sense the temperature required to cycle the
unit off.
6
8
10.8
50
45.5
10
12.0
52
47.7
12
13.1
56
52.3
14
14.4
60
57.5
16
15.7
64
62.7
18
17.0
68
68.3
20
18.4
72
74.2
22
19.9
76
80.3
24
21.4
80
86.8
26
22.9
84
93.6
28
24.5
88
100.7
30
26.1
92
108.2
32
27.8
96
116.1
34
29.5
100
124.3
If low side pressure is below pressure in chart above,
check for the following:
1. A system leak
2. Capillary tube is restricted
3. Insufficient compressor (does not pump properly)
If low side pressure is above pressure in chart above,
check for the following:
1. Restricted air flow
2. Dirty condenser coil
3. Overcharged system
4. Low side leak
SMR-0003
© Viking Range Corporation
Diagnostic Information
Re-charging
Re-charging of the unit should be done only after
diagnosing and repairing the system. Be sure to flush
the system with dry nitrogen gas and evacuate to 50
microns before re-charging.
The method for re-charging the unit is by weight using
vapor refrigerant. Using manifold gauge set-up, hook up
charge hoses to the access valve on the compressor’s
process tube. If any access valve is attached to the high
side process tube, remove it and then seal the tube by
brazing before charging. Charge the unit to specified
amount (see Unit Specifications for charge specifications
per model).
Compressor
The compressor is the heart of the refrigeration system.
However, it relies on other parts of the system to
function. Make certain that the other parts of the system
are functioning correctly before determining that the
compressor is faulty.
After re-charging the system, check pressures
(See Pressure and Temperature) for corresponding
temperatures and pressures. If pressures are incorrect,
check the sealed system, recover the charge, repair,
evacuate, and then re-charge.
It is normal to have some condensation or slight frost on
the suction line. Typically this will occur towards the end
of a run cycle. If the frost continues down the suction
line to the compressor, the system is overcharged. It
is important that the insulation remains on the suction
line and the capillary tube together after any repair and
that it is sealed on both ends. Be sure to replace the
refrigeration putty in the hole of the foam where the
refrigerant lines go through the back of the unit. Spread
the putty out evenly filling in the cracks to prevent air
from leaking in and out.
Condenser
The condenser is a steel tube serpentine with copper
alloy fins that removes heat from hot, high pressure
vapor from the compressor. The most common trouble is
lack of airflow from either a restricted intake or exhaust
opening in the front of the unit. Lint, dust, hair, and
dirt build-up needs to be removed from the condenser
periodically to allow the unit to perform properly.
© Viking Range Corporation
The following should be observed before concluding
the compressor is faulty:
1. Low high side pressures, warm evaporator plate,
cool condenser coil, or little or very low current draw
from the unit will indicate a faulty compressor.
2. Check for continuity between the compressor
terminals and the shell of the compressor. If
continuity is found, the compressor is faulty and will
need to be replaced.
3. Check for resistance between all compressor
terminals. The resistance will vary from terminal
to terminal and from compressor to compressor
due to age and use. If no resistance is found, the
compressor is faulty and will need to be replaced.
SMR-0003
7
Diagnostic Information
Evaporator
The evaporator uses evaporating refrigerant to remove
heat from the inside of the unit ultimately making the
interior cold. The shape and size of the evaporator may
vary among the models covered by this service manual
but the fundamentals are the same . The DFUW, DUWC,
AND VUWC use a vertical right angle evaporator plate.
The DFUR, DUAR, AND VUAR use a U-shaped plate.
The DFRD, DURD, AND VURD use a multi-purpose
evaporator plate.
It is normal for the evaporator to frost up during its run
cycle. This frost will dissipate once the unit reaches
its “cut out” temperature and the compressor and
fan stop. This condensate water will flow to the rear
of the machine in a condensate pan where it will be
evaporated from compressor and fan heat. It is very
important that the evaporator frosts in a uniform pattern
across the plate (see Evaporator Frost Pattern). A partial
frost pattern can lead to excessive run times and cooling
issues.
Evaporator plate for DFRD, DURD, and VURD
refrigerated drawers
Evaporator plate for DFUW, DUWC, and VUWC wine
coolers
Condenser Fan
The condenser fan is used to force air over the
condenser coil. The fan will cycle on and off with the
compressor which means that when the compressor is
running so is the fan and when the compressor is not
running neither is the fan (see illustration below).
1. Make sure the motor shaft turns freely. This can
be done by rotating the fan blade by hand and
observing any excessive resistance.
2. Check for resistance between terminals. If no
resistance is found, replace the condenser fan.
3. Check for continuity between terminals and fan
casing. If continuity is found, replace the condenser
fan.
4. Check current draw. Typical current draw will be
0.15 amp without fan resistance. If current draw
is 0.19 amp or more, check for resistance in air
movement or objects touching the fan blade. If this
is not found, replace the condenser fan.
Evaporator plate for DFUR, DUAR, and, VUAR
beverage centers
8
SMR-0003
© Viking Range Corporation
Diagnostic Information
Thermistors
The wine cellars, beverage centers, and refrigerated
drawers utilize two thermistors: The evaporator
thermistor and the display thermistor. Each thermistor
has a different function for input to the electronic control.
Resistance versus Temperature Chart
Temperature (C)
Temperature (F)
Resistance (K-OHMS)
-15
5
11.350
-10
14
8.918
-5
23
6.700
0
32
5.630
5
41
4.520
10
50
3.652
15
59
2.970
20
68
2.430
25
77
2.000
Evaporator thermistor:
The evaporator thermistor turns the unit on and off. It is
secured to the evaporator or cabinet liner.
Display thermistor:
The display thermistor is connected to the LED display
and displays the temperature inside the unit on the
display panel.
The following will happen in the event of one or both
thermistors fail:
1. If the evaporator thermistor fails, all loads will be
shut off and the unit will not run.
2. If the evaporator thermistor senses temperature
outside of 0-140 degrees F, all loads will be shut off
and the unit will not run.
3. The display panel will flash E3 for an evaporator
thermistor failure and E4 for a display thermistor
failure. If both thermistors fail, the error codes will
be displayed sequentially. An audible alarm will also
sound six times every minute if either one or both
thermistors fails.
If the thermistor has been tested and is found to be
good, check the temperature of the evaporator plate
and the resistance of the thermistor. If the temperature
of the evaporator plate does not correspond to a proper
resistance from the thermistor, check for a proper and
secure connection of the thermistor to the evaporator
plate bracket.
The thermistor can be checked by use of a multimeter
with the ability to read resistance. To check the
thermistor:
1. Disconnect and remove thermistor from unit.
2. Use a reference temperature point that is know
(such as an ice bath) and measure the resistance
across the wire leads.
3. Compare the recorded resistance with figure in
Resistance versus Temperature Chart.
If measured resistance falls 4% or greater outside the
resistance given below, the thermistor is bad and will
need to be replaced.
© Viking Range Corporation
SMR-0003
9
Diagnostic Information
User Interface Panel and Tru Protect™ System
SET
OFF
WARMER
F/C
COLDER
LIGHT
POWER FAILURE - Flashing Amber
HIGH/LOW TEMP - Red
ALARMS OFF - Steady Amber
PRESS ON/OFF - Reset
PRESS AND HOLD
SET
OFF
TruProtect System
WARMER
COLDER
F/C
POWER FAILURE - Flashing Amber
HIGH/LOW TEMP - Red
ALARMS OFF - Steady Amber
PRESS ON/OFF - Reset
PRESS AND HOLD
Overview
TruProtect System
Interior Light and Switch
Starting the Unit
For Wine Cellars/Beverage Centers:
The light will automatically turn on when the door is
opened and off when the door is closed. To engage the
display light feature, press the “LIGHT” button on the
display panel. The light will come on and stay on, even
with the door closed, until the “LIGHT” button is pressed
again.
Setting the Temperature Mode
For Refrigerated Drawers:
The light switch will automatically turn on the light when
the drawer(s) is opened and off when the drawer(s) is
closed. There are two light switches in each drawer unit:
one on the top and one on the bottom. They are both
located on the inside left hand of the drawers. In addition
to turning the light on and off, the light switches also turn
the display panel and interior fan(s) on and off.
Viking’s Tru Protect™ system informs the user if the
unit is not functioning properly through both visual and
audible alerts. The LED display panel displays a steady
green light when the Tru Protect™ system is enabled.
To start the unit, push and hold for five (5) seconds the
“ON/OFF” button located on the display panel. Upon
turning the unit on, the display will read the actual
temperature inside of the unit. If the interior temperature
is greater than 99 degrees F, the display will flash 99
until the temperature drops to 99 degrees F.
The unit can display either Fahrenheit (F) or Celsius (C).
To do so, press the “ °F/C” button on the display panel.
Adjusting the Temperature Control
The temperature control is fully adjustable from the low
40s to the mid 60s in the wine cellars and beverage
centers. The set point out of the factory is approximately
55 degrees F. The temperature control is adjustable from
the low 30s to the high 40s in the refrigerated drawers.
The set point out of the factory is approximately 38
degrees F. The range, whether it be for wine cellars
and beverage centers or refrigerated drawers, allows
flexibility of temperature preferences and provides the
ideal wine aging or food storing temperatures. The
temperature can be lowered or raised by first pressing
the “SET” button on the display panel. A “SET” icon
will be displayed. This icon will turn off 10 seconds
after completing the adjustments. Pressing either the
“WARMER” or “COLDER” buttons will raise or lower the
set temperature by one (1) degree F or C (depending
on the setting). NOTE: As with any refrigeration product,
there is a slight temperature variance at different
locations within the cabinet.
10
Sabbath Mode
The unit is equipped with a Sabbath Mode of operation.
When Sabbath Mode is enabled, the displays, audible
alarms, lights, and all options are disabled. The user
interface buttons remain enabled with audible key tones
disabled.
Enabling Sabbath Mode:
Press and hold the “SET” button while pressing the “
°F/C” button four (4) times within seven (7) seconds. The
display will flash “SA” seven (7) times and then the unit
will enter Sabbath Mode.
Disabling Sabbath Mode:
Press and hold the “SET” button while pressing the “
°F/C” button four (4) times within seven (7) seconds.
1. Sabbath Mode automatically disables after 72 hours.
2. A power outage will not disable Sabbath Mode.
Disabling can only be accomplished by the
automatic time-out or by the user.
3. The display returns to operation prior to Sabbath
Mode activation.
SMR-0003
© Viking Range Corporation
Diagnostic Information
Warning Alarm
The Tru Protect™ system will inform you if the unit is not
functioning properly. It provides both visual and audible
alerts if the temperature rises above or falls below the
set temperature, if there is a power failure, or if the door
is left ajar.
1. Door Ajar: If the door is left open for more than five
(5) minutes, an audible alarm will sound three (3)
times every 30 seconds and the LED light will flash
green. This will stop as soon as the door is closed.
2. High and Low Temperature: If the unit reaches a
temperature either above or below the set point
temperature for more than one (1) hour, an audible
alarm will sound six (6) times every minute and the
LED will flash red. This will continue until the alarm
is reset. The alarm may occur when changing setpoints in excess of 10 degrees F and/or high usage
which is normal.
3. Power Failure: If the unit experiences a power
failure, the LED will flash amber. This will continue
until the alarm is reset. With a power failure, no
audible signal is heard. The alarm may occur upon
initial installation which is normal since the unit was
run at the factory to verify quality.
Error Code Detection
The microprocessor in the control continually monitors
critical refrigeration system components for proper
operation. If component parameters exceed normal
operating specifications, an audible alarm will sound six
(6) times every minute and the display will automatically
flash the respective error code. If multiple errors are
noted with the unit, the error codes will be displayed
sequentially. See chart below for respective error codes
descriptions and the potential causes of failure.
Error Code Detection Reference
Error Code
Error Code Reference
1. Compressor wires
disconnected.
2. Faulty compressor.
E1
Compressor fault (high/
low amps)
1. Condenser fan motor
wires disconnected.
E2
Condenser fan motor
fault (high/low amps)
E3
Evaporator thermistor
“sensor B” fault (out-ofrange)
E4
Display thermistor
“sensor A” fault (out-ofrange)
Show Room Mode is used mainly by salespersons and
distributors. When the unit is in Show Room Mode, it will
operate as if functioning normally; however, the internal
components will not run.
2. Faulty condenser fan
motor.
3. Faulty control.
Close door to reset Door Ajar alarm. Press the “ON/
OFF” button for approximately one (1) second to reset
all other audible and display alarms.
Show Room Mode
3. Faulty control.
4. Faulty compressor
overload.
5. Faulty compressor
PTC starter.
Resetting the Alarms
NOTE: Although pressing the “ON/OFF” button will
reset the alarms, the alarm will resume if the
“alarm condition” still exists.
Potential Causes of
Failure
1. Disconnected wire
causing open.
2. Shorted thermistor
wires.
3. Faulty thermistor.
Resetting Error Codes:
Error Codes can only be reset by disconnecting and
reconnecting the power supply to the unit.
Enabling Show Room Mode:
To enable Show Room Mode, press and hold the “ON/
OFF” button while performing a “Power On Reset”
(POR), i.e. - disconnect and reconnect the power supply
to the unit. When Show Room Mode is enabled, the
compressor, condenser fan, internal fan(s), heater,
reverse gas solenoid, and alarms are disabled. The
display will show the last set point entered.
Disabling Show Room Mode:
To exit Show Room Mode, initiate a “Power On Reset”
(POR) only.
© Viking Range Corporation
SMR-0003
11
Diagnostic Information
Service Diagnostics Mode
Service Diagnostics Mode allows you to identify the
firmware and software versions, test status of “model
specific” system components and sensors, and change
state of components where applicable (i.e. - compressor
on/off, etc...).
Available Component Tests
Test #
Component
Description
Enabling Service Mode:
To enable Service Mode, press and hold the “WARMER”
button while pressing the “COLDER” button four times
within five seconds.
•
•
You cannot enable Service Mode while in Set Mode.
All system functions will remain in their current state
while in Service Mode.
Alarms are disabled during Service Mode and reset
after exiting Service Mode.
Service Mode will automatically disable after five (5)
minutes of no keypad entry.
•
•
After entering Service Mode, the first number that you
will see indicates the software model number for the
particular unit you are servicing. For example, if you are
servicing a 24 inch wine cellar (DFUW, DUWC, VUWC),
the first number you will see is 11. See chart below for
corresponding model and software reference.
Software Model Number
Model
Description
Software Model Number
DFUW, DUWC, VUWC
24 inch Wine Cellar
11
DFUR, DUAR, VUAR
24 inch Beverage
Center
21
DFRD, DURD, VURD
24 inch Refrigerated
Drawers
16
Off/Open
On/Shorted
0
Temp
Sensor A Evaporator
0-
00
01
1
Temp Sensor
B - Display
1-
10
11
2
Compressor
n/a
20
21
3
Interior/Ice
Maker Fan
n/a
30
31
4
Reverse Gas
Solenoid
n/a
40
41
5
Condenser
Fan
n/a
50
51
6
Mullion
Heater
n/a
60
61
7
Door A
Sense
n/a
70
71
8
Door B
Sense
n/a
80
81
9
Door C
Sense
n/a
90
91
Note: Must use magnet to change state of door C sense
Disabling Service Mode:
To exit service mode, press and hold the “WARMER”
button while pressing the ”COLDER” button four (4)
times within five (5) seconds.
•
Service Mode will automatically disable after five (5)
minutes of no keypad entry.
Ordering Parts
The second number you will see indicates the software
version release. For example, if you see 44 on the
display panel it indicates software version 4.4.
Diagnostics:
While in Service Mode, press the “SET” button to step
through Tests 0-9. The first digit of the display will show
the test number. The second digit indicates the current
state of each component under test and is displayed as
“1” being ON, CLOSED, or SHORTED and “0” being
OFF or OPEN. Tests 0 and 1 reveal an open or shorted
condition detected at the sensor inputs. Tests 2 through
6 allow you to turn loads ON with the “WARMER” button
and OFF with the “COLDER” button. Tests 7 through 9
verify state change of the door switches and/or magnetic
reed sensor. The component tests available are
described in Available Component Tests chart.
12
Available Status Indicators
OK
The following information will need to be given when
inquiring about service parts:
•
•
•
•
Model and serial number located on the serial
nameplate (see Introduction, Serial Nameplate)
Color of the model
Metal or plastic grille
Type of door
To order parts, call or write:
Viking Range Corporation
Customer Service
111 Front Street
Greenwood, Mississippi 38930 USA
662.455.1200
For product information, call 1.888.VIKNG1 (845.4641)
or visit the Viking Web Site at vikingrange.com
SMR-0003
© Viking Range Corporation
Troubleshooting Procedures
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.
PROBLEM
POSSIBLE CAUSE
1. The unit is unplugged.
Plug in the unit.
Unit does not operate.
2. Did not hold the “ON/OFF”
button long enough on the display
panel.
Press and hold the “ON/OFF” button
for five seconds.
1. Did not press the “ °F/C” button
on the display panel.
Press the “ °F/C” button to toggle
between F and C.
1. Did not press and hold the
“SET” button on the display
panel while pressing either the
“WARMER” or “COLDER” button.
Press and hold the “SET” button
and press either the “WARMER” or
“COLDER” button. This will raise
or lower the set temperature by one
degree F or C (depending upon the
setting).
1. Display light feature engaged
(for Wine Cellars and Beverage
Centers).
Press the “LIGHT” button. The light
will come on and stay on with the
door closed until the “LIGHT” button
is pressed again.
2. The light bulb is burned out.
Replace the light bulb and then press
“LIGHT” button.
1. Did not press the “LIGHT”
button before the door was last
closed.
Press “LIGHT” button to disengage
light.
1. Did not press the “ °F/C” button
on the display panel four times
within seven seconds.
Press and hold the “SET” button
while pressing the “ °F/C” button four
times within seven seconds. The
display will flash “SA” seven times
and the unit will enter Sabbath Mode.
1. Sabbath Mode automatically
disables after 72 hours.
Restart Sabbath Mode by pressing
and holding the “SET” button while
pressing the “ °F/C” button four times
within seven seconds.
1. Did not press the “ °F/C” button
on the display panel four times
within seven seconds.
Press and hold the “SET” button
while pressing the “ °F/C” button four
times within seven seconds. NOTE:
Sabbath Mode will automatically
disable after 72 hours.
1. Door Ajar alarm.
Close the door.
1. High and Low Temperature
alarm.
Press the “ON/OFF” button for
approximately one second to reset
audible and display alarms. NOTE:
Although pressing the “ON/OFF”
button will reset the alarms, the alarm
will resume if alarm condition still
exists.
Unit does not display Celsius (C).
Temperature controls are not raising
or lowering the set temperature on the
unit.
Display light feature is not engaged.
Door is closed but the light is still on
inside of the unit.
Sabbath Mode is not engaging.
Sabbath Mode automatically disabled.
Sabbath Mode is not disabling.
Audible alarm sounding three times
every 30 seconds and LED light
flashing green.
Audible alarm sounding six times
every minute and LED light flashing
red.
© Viking Range Corporation
SMR-0003
CORRECTION
13
Troubleshooting Procedures
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.
PROBLEM
LED light flashing amber and no
audible signal heard.
Want to give a customer
demonstration but Show Room Mode
is not enabling.
Compressor, condenser fan, internal
fan(s), heater, reverse gas solenoid,
and alarms are not working but the
display is functioning normally.
E1 error code on display panel and
audible alarm sounding six times
every minute (Compressor fault - high/
low amps).
E2 error code on display panel and
audible alarm sounding six times
every minute (Condenser fan motor
fault - high/low amps).
E3 error code on display panel and
audible alarm sounding six times
every minute (Evaporator thermistor
“sensor B” fault).
E4 error code on display panel and
audible alarm sounding six times
every minute (Display thermistor
“sensor A” fault).
Service Mode is not engaging.
Service Mode disabled automatically.
14
POSSIBLE CAUSE
CORRECTION
1. Power Failure alarm.
Press the “ON/OFF” button for
approximately one second to reset
audible and display alarms. NOTE:
Although pressing the “ON/OFF” button
will reset the alarms, the alarm will
resume if alarm condition still exists.
NOTE: This alarm will occur
upon initial installation which
is normal since the unit was
run at the factory to verify
quality.
1. Did not perform a “Power
On Reset” (POR).
To enable, press and hold the “ON/
OFF” button on the display panel while
performing a “Power On Reset” (POR),
i.e. - disconnect and reconnect power
supply to the unit.
1. Show Room Mode
enabled.
To exit, press and hold the “ON/OFF”
button while performing a “Power On
Reset” (POR), i.e. - disconnect and
reconnect power supply to the unit.
1. Compressor wires
disconnected.
Check wiring diagram on back of unit
and reconnect wires.
2. Faulty compressor.
Replace compressor.
3. Faulty control.
Replace control.
4. Faulty compressor
overload.
Replace overload.
5. Faulty compressor PTC
starter.
Replace PTC starter.
1. Condenser fan motor
wires disconnected.
Check wiring diagram on back of unit
and reconnect wires.
2. Faulty condenser fan
motor.
Replace condenser fan motor.
3. Faulty control.
Replace control.
1. Disconnected wire
causing open.
Check wiring diagram on back of unit
and reconnect wires.
2. Shorted thermistor wires.
Replace thermistor.
3. Faulty thermistor.
Replace thermistor.
1. Disconnected wire
causing open.
Check wiring diagram on back of unit
and reconnect wires.
2. Shorted thermistor wires.
Replace thermistor.
3. Faulty thermistor.
Replace thermistor.
1. Did not press the
“WARMER” and “COLDER”
buttons the correct amount
of times in the allotted time
period.
To enable, press and hold the
“WARMER” button while pressing the
“COLDER” button four times within five
seconds.
1. After five minutes of no
keypad entry, Service Mode
will automatically disable.
To restart, press and hold the
“WARMER” button while pressing the
“COLDER” button four times within five
seconds.
SMR-0003
© Viking Range Corporation
Troubleshooting Procedures
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.
PROBLEM
POSSIBLE CAUSE
CORRECTION
Service Mode is not disabling.
1. Did not press the “WARMER”
and “COLDER” buttons the
correct amount of times in the
allotted time period.
To exit, press and hold the
“WARMER” button while pressing the
“COLDER” button four times within
five seconds.
1. Tru Protect™ was disabled.
Press and hold the “SET” button for
five seconds. NOTE: Steady green
light on the LED indicates
LED is not displaying a steady green
light on the display panel.
Tru Protect™ engaged.
Tru Protect™ will not disable.
1. Did not hold the “SET” button
on the display panel long enough.
Press and hold the “SET” button for
five seconds. NOTE: Steady amber
light on the LED indicates
Tru Protect™ disabled.
Software model number does not
match the unit purchased, i.e. - 11
should correspond to a 24 in. wine
cellar.
1. Wrong unit software installed.
Call Viking Customer Service to
obtain new user interface.
Temperature range for the unit does
not correspond to the temperature
range given by Viking (out-of-range).
1. Wrong unit software installed.
Call Viking Customer Service to
obtain new user interface.
© Viking Range Corporation
SMR-0003
15
Component Testing Procedures
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.
Component
Test Procedure
Service Action
Perform visual check of frost pattern on
evaporator plate������������������������������������. •
•
A uniform frost pattern indicates a satisfactory
flow of refrigerant through evaporator.
An incomplete or uneven frost pattern indicates
a possible blockage in evaporator or a low
refrigerant charge in the system.
Evaporator Plate
1. Disconnect power to unit.
2. Discharge run capacitor by shorting
across terminals with a resistor 1
minute (some models)
3. Remove leads from compressor
terminals.
4. Set ohmmeter to lowest scale.
5. Check for resistance/continuity
across the following:
• Start winding/Run winding (See
Compressor section)������������������������ •
Compressor
•
•
Run/Common/Start terminals to
compressor housing������������������������� •
1. Disconnect power to unit.
2. Remove capacitor from circuit.
3. Discharge capacitor by shorting
terminals with a resistor for 1
minute.
4. Check resistance across capacitor
terminals with ohmmeter set to kΩ
scale������������������������������������������������� •
Run Capacitor
(some models)
•
•
•
Perform visual check to ensure that
sufficient airflow passes over the
condenser����������������������������������������������� •
•
Condenser
16
SMR-0003
If run winding or start winding reads high to
infinite resistance (open), replace compressor.
If run winding or start winding reads no
resistance (dead short), replace compressor.
If continuity to ground is found in any of the
three terminals, replace compressor.
Good - needle swings to zero and slowly
moves back to infinity.
Open - needle does not move. Replace run
capacitor.
Shorted - needle moves to zero and stays.
Replace run capacitor.
High resistance leak - needle jumps to
zero and then moves back to constant high
resistance (not infinity). Replace run capacitor.
Ensure that there is no blockage of the intake
or exhaust side of condenser.
Ensure that condenser is free of dust, lint, or
hair that may hinder heat transfer.
© Viking Range Corporation
Component Testing Procedures
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.
Component
Test Procedure
Service Action
1. Inspect fan to ensure that it is
mechanically sound. Rotate blades
while feeling for resistance to
movement���������������������������������������� •
2. Check for resistance between fan
terminals������������������������������������������ •
3. Check for continuity between each
terminal and fan chassis������������������ •
Condenser Fan
4. Check current draw�������������������������� •
1. Check for voltage at fan terminals��� •
2. Check for resistance between fan
terminals������������������������������������������ •
3. Check for continuity between each
terminal and fan chassis������������������ •
Evaporator Fan
1. Disconnect and remove thermistor
from unit.
2. Use a known reference temperature
point (i.e. an ice bath).
3. Measure resistance across wire
leads.
4. Compare measurement with values
in Resistance versus Temperature
Chart (see Thermistors)������������������� •
Display Thermistor
Evaporator
Thermistor
1. Disconnect and remove thermistor
from unit.
2. Use a known reference temperature
point (i.e. an ice bath).
3. Measure resistance across wire
leads.
4. Compare measurement with values
in Resistance versus Temperature
Chart (see Thermistors)������������������� •
© Viking Range Corporation
SMR-0003
Ensure that fan as free of any debris, dirt, or
lint that might hinder rotation.
Replace fan if dead short is found across fan
terminals.
Replace fan if continuity is found between
terminal and fan chassis.
Typical current draw is 0.15 amps for fan
without increased mechanical resistance. If
observed current is at or above 0.19 amps,
replace fan.
12VDC
Replace fan if dead short is found across fan
terminals.
Replace fan if continuity is found between
terminal and fan chassis.
If observed resistance is greater than 4% out
of spec, replace thermistor.
If observed resistance is greater than 4% out
of spec, replace thermistor.
17
Component Testing Procedures
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.
Component
Test Procedure
Service Action
1. Remove overload from circuit and
allow 2 min. to cool.
2. Check resistance between overload
terminals������������������������������������������ If terminals read open or dead short, replace
overload.
Overload
1. Remove overload from circuit and
allow 2 min. to cool.
2. Check resistance between overload
terminals
If terminals read open or dead short, replace
overload.
PTC Starter
18
SMR-0003
© Viking Range Corporation
Disassembly
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.
Mechanical Baseplate:
To gain access to mechanical baseplate, remove the screws that hold the lower shroud in place and then remove
the shroud (see illustration below). To facilitate working on any component mounted to the mechanical base, remove
the screws that hold the baseplate to the chair frame and slide out the baseplate enough to allow working room
required (see illustration below).
Remove Screws
Remove screws securing
the mechanical baseplate.
Slide out the
mechanical baseplate
© Viking Range Corporation
SMR-0003
19
Disassembly
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.
Compressor
Removing the compressor
1. Disconnect power to the unit.
2. Remove the back panel and lower shroud.
3. Remove the screws that hold the baseplate to the
chair frame of the unit and slide out the mechanical
baseplate.
4. Install sealed system access valve(s) and recover
refrigerant. After recovering, be sure to cap off the
access valve(s) to prevent contamination of the
system.
5. Remove the cap from the rear of the compressor to
expose the starter and overload.
6. Disconnect the PTC starter and overload from the
compressor by pulling off. Disconnect the wires from
the starter and overload.
7. Un-braze and remove capillary tube from drier
assembly.
8. Un-braze and remove suction line at compressor.
9. Un-braze high side line from the compressor going
to the condenser.
10. Remove compressor by removing the three lock
nuts on the mounting plate of the compressor. Lift
the compressor off of the carriage bolts.
8. Charge the unit.
9. Reinstall back panel and lower shroud to complete
installation.
Installing the Compressor:
1. Install the four rubber grommets in the bottom of the
new compressor and install the three sleeves where
the carriage bolts will be located. Mount the new
compressor and install the three washers and lock
nuts and tighten to 45 in-lbs. DO NOT REMOVE
THE RUBBER PLUGS AT THE TUBE STUBS ON
THE COMPRESSOR AT THIS TIME.
2. Install and braze new drier assembly to condenser.
Then install and braze capillary tube to drier.
Remove the plug for the high side line to condenser.
Install and braze the line to the compressor.
3. Remove the plug for the process tube on the
compressor. Install and braze process tube. Be sure
to cap off end to prevent any contamination.
4. Remove the plug for the suction line on the
compressor. Install and braze the suction line from
the evaporator. BE SURE TO ALSO REINSTALL
THE SUCTION LINE AND TUBING HARNESS
INSULATION TUBES.
5. Reinstall the PTC starter and overload and wire
according to the wiring diagram.
6. Reinstall the compressor cap.
7. Reinstall the screws that secure the baseplate to the
chair frame of the unit. Be sure to fasten down the
ground wire to the baseplate.
20
SMR-0003
© Viking Range Corporation
Disassembly
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.
Condenser
Removing the condenser
1. Disconnect power to the unit.
2. Remove back panel and lower shroud.
3. Remove the screws that hold the baseplate to the
chair frame of the unit and slide out the mechanical
baseplate.
4. Install sealed system access valve(s) and recover
refrigerant. After recovering, be sure to cap off the
access valve(s) to prevent contamination of the
system.
5. Remove the condenser fan by removing the
four screws on the fan mounting bracket at the
baseplate. The fan wire leads can be left connected.
Set the fan assembly to the side out of the
mechanical.
6. Remove the condenser fan shroud.
7. Un-braze capillary tube from drier assembly.
8. Un-braze high side tubing from the compressor.
9. Remove the condenser and drier assembly.
Installing the condenser
• Reverse the removal procedure for installation.
• Always install a new drier after opening the sealed
system.
• Be sure to flush the system and evacuate to 50
microns before weight charging.
• If contamination was found or determined, the
evaporator should also be replaced at this time.
Condenser Fan
1. Disconnect power to the unit.
2. Remove access panel and rear panel.
3. Remove the grille by removing the screws and
disconnecting the wires to the rocker switch. Be sure
to mark where these wires go for reassembly.
4. Take out the screws that secure the top of the
electrical bracket located in the front of the
mechanical area.
5. Remove the screws that secure the baseplate to the
cabinet on the bottom of the unit.
6. Gently slide the mechanical out the back of the unit
to gain access to the condenser fan.
7. Disconnect the neutral white wire lead (black ribbed
wire) and hot wire lead (black smooth wire) from the
wire harness.
8. Remove the condenser fan.
9. Reverse the removal procedure for installation.
© Viking Range Corporation
Thermistors
1. Disconnect power.
2. Remove back panel and lower shroud.
3. Disconnect the evaporator thermistor connector at
the electronic controller.
4. Remove evaporator thermistor by removing the
screw securing it.
5. Feed the thermistor wire out through the opening in
the back of the unit.
6. Reverse the removal procedure for installation.
Lights
For Wine Cellars:
The wine cellars are equipped with two 6 watt tube lights
located on the inside top of the cabinet.
Replacing the Tube Light:
1. Disconnect power to the unit.
2. Remove the bulb from the channel in which it sits.
Each light is fit snugly into the channel so you might
need to use a screwdriver or knife to help loosen it.
3. Once the bulb is out of the channel, unplug it from
the connector and set it aside.
4. Plug the new bulb into the connector and press
the bulb snugly into the channel. You might need
to press or tap firmly to place the bulb back in the
channel.
5. Reconnect power to the unit and check to see if the
light tube operates properly.
For Beverage Centers:
The beverage centers are equipped with a 15 watt light
bulb located behind the display housing on the inside top
of the cabinet.
Replacing the Light Bulb:
1. Disconnect power to the unit.
2. Unscrew the old light bulb located behind the display
housing.
3. Set the old light bulb aside to discard.
4. Screw the new light bulb into place.
5. Reconnect power to the unit and check to see if the
light bulb operates properly.
For Refrigerated Drawers:
The refrigerated drawers are equipped with two LED
lights: one on the inside top of the drawer and one on
the underside of the divider.
SMR-0003
21
Disassembly
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.
Replacing the Top LED Light:
1. Loosen the screws to the control housing. You do
not need to remove them.
2. Pull the control housing forward out of the screw
slots.
3. Look inside the control housing and remove the wire
connector to the light.
4. Press down and out on the LED bulb and lens. You
will need to press the release tab on the lens.
5. Remove old bulb and set aside.
6. Insert new bulb and reverse steps 1-4 to complete.
Replacing the Divider LED Light:
1. Remove screws to the divider section and pull the
divider out from the unit.
2. Flip the divider over for easier access to the lens
assembly. Be careful not to disturb other wiring
inside the unit.
3. Press in on the lens release tabs while
simultaneously prying the lens upward using a flatblade screwdriver. The release tabs are located at
the midpoint of the front and rear edge of the lens.
4. Unhook lens from wire connector and remove it from
the divider. Discard the lens.
5. Attach wire connector to new lens and snap lens
back into place.
6. Reattach divider section to the unit.
22
SMR-0003
© Viking Range Corporation
Wiring Diagrams and Schematics
Wine Cellar Wiring Schematic
TAN
ORG
EVAP SENSE
RED
WHITE
WHITE
BLK/YEL
BLUE
REED SWITCH (FRONT)
AIR SENSE
OVERLOAD
WHITE
J7
J4A
J6
DATA COMMUNICATION
WHITE/YELLOW
PTC
J8
J4
J5
NEU
D
USER INTERFACE BOARD
BACK VIEW
COMPRESSOR WIRING
EVAP. SENSE THERMISTOR
AIR SENSE THERMISTOR
LINE
USER INTERFACE
BOARD
REED
SWITCH
AURA LIGHT
BLU
AURA LIGHT
WHT
DOOR
MAGNET
COMM.
CONTROL BOARD DETAIL
TOP VIEW
BLK/YEL
WHITE
D
CONDENSER
FAN
BLU
NO
CONNECTION
YEL
RED
D
D
YEL
D
BLK
D
TECUMSEH
COMPRESSOR
WHT/YEL
WHT
CAPACITOR
BLK
NO
CONNECTION
RED
CABINET FAN
CONTROL
BOARD
WHT
BLK
CHASSIS GND.-GRN
SERVICE CORD
DFUW144, DUWC 144, VUWC144
© Viking Range Corporation
SMR-0003
23
Wiring Diagrams and Schematics
Beverage Center Wiring Schematic
TAN
ORG
EVAP SENSE
OVERLOAD
WHITE
WHITE
BLK/YEL
BLUE
REED SWITCH (FRONT)
AIR SENSE
RED
WHITE
J7
J4A
J6
J8
J4
J5
NEU
WHITE/YELLOW
PTC
DATA COMMUNICATION
USER INTERFACE BOARD
BACK VIEW
C
COMPRESSOR WIRING
EVAP. SENSE THERMISTOR
AIR SENSE THERMISTOR
LINE
USER INTERFACE
BOARD
REED
SWITCH
AURA LIGHT
BLU
AURA LIGHT
WHT
DOOR
MAGNET
COMM.
CONTROL BOARD DETAIL
TOP VIEW
BLK/YEL
WHITE
C
CONDENSER
FAN
RED
TECUMSEH
COMPRESSOR
WHT/YEL
WHT
CONTROL
BOARD
CAPACITOR
WHT
BLK
CHASSIS GND.-GRN
SERVICE CORD
DFUR143, DFUR144, DUAR143
DUAR144, VUAR143, VUAR144
24
SMR-0003
© Viking Range Corporation
Wiring Diagrams and Schematics
Refrigerated Drawer Wiring Schematic
TAN
ORG
OVERLOAD
WHITE
WHITE
BLK/YEL
BLUE
WHITE
J7
J4A
J6
J8
J4
J5
NEU
EVAP.SENSE
RED
PTC
COMPRESSOR WIRING
AIR SENSE
DATA COMMUNICATION
DOOR SENSE
C
DOOR SENSE
REED SWITCH (FRONT)
USER INTERFACE BOARD
BACK VIEW
EVAP. SENSE THERMISTOR
AIR SENSE THERMISTOR
LINE
USER INTERFACE
BOARD
SWITCH
REED
SWITCH
SWITCH
DOOR
MAGNET
COMM.
CONTROL BOARD DETAIL
TOP VIEW
HEATERANTI-SWEAT
BLK/YEL
WHITE
GRN
C
GND
RED
SERVICE
CONNECTION
ORG
CONDENSER
FAN
ORG
RED
BLU
C
YEL C
BLK
LED LIGHT
YEL
C
BLU
C
YEL
C
C
YEL
C
BLK
C
WHITE
LED LIGHT
RED
EMBRACO
COMPRESSOR
BLK
RED
CABINET FAN
80RD ONLY
CABINET FAN
CONTROL
BOARD
WHT
BLK
CHASSIS GND.-GRN
SERVICE CORD
DFRD144, DURD144, VURD144
© Viking Range Corporation
SMR-0003
25
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