Viking DFUW244CL Service Manual Download Page 69

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View of Upper Compartment

Figure 12.1

View of Lower Compartment

Figure 12.2

Control box

User interface
and display

Serial plate

Wood shelf trim

Compartment divider

Wood shelf trim

Condenser air intake

Condenser air baffle

Condenser air exhaust

Front grille

2010 - Viking Preferred Service

SMR-0005

Summary of Contents for DFUW244CL

Page 1: ...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 ...

Page 2: ...t 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 Bas...

Page 3: ...echanical 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 Secti...

Page 4: ...agram 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 ...

Page 5: ...d 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 Ga...

Page 6: ...Section 1 Introduction to Dual Zone 2010 Viking Preferred Service SMR 0005 ...

Page 7: ...ct 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 5th 6th digit 02 is the month built 7th and 8th digits 18 is the day built 9th 10th 11th digit 001 is the sequential number built that d...

Page 8: ...ned at a right angle to cabinet top and securely fastened to hinge 6 assembly Insure that door is properly closed and making contact with reed switch on the user interface 7 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 they ...

Page 9: ...t 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...

Page 10: ...Section 2 Dual Zone Characteristics 2010 Viking Preferred Service SMR 0005 ...

Page 11: ...e 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 five 5 seconds to turn the unit on and off When off the displa...

Page 12: ...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...

Page 13: ...y repeat the same procedure used to enable 2 1 11 Door Ajar Alarm 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 T...

Page 14: ...mperature 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 ...

Page 15: ...ostics 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 five 5 seconds The display will flash both the software and firmware version To exit the diagnostics mode repeat the above process or let the User Interface time out of the mode after five 5 minutes of no keypad functions Firm Ware Soft Ware Co...

Page 16: ...Section 3 Refrigeration Systems 2010 Viking Preferred Service SMR 0005 ...

Page 17: ...an 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 Configuration 12 2010 Viking Preferred Service SMR 0005 ...

Page 18: ... 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 Configuration cont 13 2010 Viking Preferred Service SMR 0005 ...

Page 19: ...nts during the repair or disposal of an appliance Whenever possible it is best to perform all system repairs at the service center rather then the 7 customer s home Always have proper ventilation using a torch when disconnecting soldered joints It is not un 8 common to have some oil flash when the copper tubes are heated and separated Always wear protective safety glasses and gloves when working o...

Page 20: ...ubricant 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 pu...

Page 21: ... occurred Using a dirty filter drier will increase the percentage of system failure Moisture and other non condensable material are detrimental to the operation of the refrigeration system Do not open the new sealed filter drier until ready to install and solder the system closed 5 It is also recommended that the compressor be replaced if a low side leak was found The com pressor has drawn moistur...

Page 22: ...alve near the base of the compressor leave some room on the process tube in case the unit has to be serviced again Before piercing the process tube install the low side hose from your manifold gage to the access valve Once the valve has been pierced slightly crack the hose fitting at the manifold long enough to bleed the air from line When service has been completed the access valve should be remo...

Page 23: ...eck the serial plate for the type of refrigerant used in the system To flush the system remove the compressor and filter drier from the system The condenser evaporator and capillary tube should all be flushed independent from each other Before flushing a process adaptor needs to be placed on one end of the component being flushed Place a rag over the opposite end to catch any oil or particles remo...

Page 24: ... vacuum pump for a minimum of 30 minutes or 29 9 inches 50 microns 13 Close the hand shut off valve to the vacuum pump and watch the low side manifold gauge for a few minutes If there is no change in the gauge pressure the system is sealed and no leaks are present At this time the system is ready to charge If the vacuum pump can not achieve a good vacuum in a reasonable amount of time or the low s...

Page 25: ...system 7 Close charging valve on Dial A Charge 8 Turn on unit and let compressor run for a few minutes 9 Monitor system pressures and the temperature of lines with your hand 10 If everything is satisfactory clamp off the high side process tube when the unit is running 11 Slowly open the high side valve and allow the compressor to remove any refrigerant remaining in the high side line 12 Close both...

Page 26: ...arging 2 Continue to charge while monitoring the scale weight 3 When the predetermined weight has been reached the valve can be shut off 3 14 Leak Test System Using a leak detector 1 Check the high side with the compressor running 2 Check the low side with the compressor off 21 2010 Viking Preferred Service SMR 0005 ...

Page 27: ...Section 4 TruProtect Control Diagnostics 2010 Viking Preferred Service SMR 0005 ...

Page 28: ...n testing the status of the door reed switch a magnet held between the On Off keypad and display will show the status The Warmer Colder keypad serve no purpose for this test The Service Mode will time out and return to the main display mode after five 5 minutes if keypad is left idle Please refer to the following chart for Test Number Component and Status Test Component Description Available Statu...

Page 29: ...nt Thermistor Sensor Error Open or Out of Range Possible Causes 1 Disconnected Broken Wire 2 Shorted Thermistor Wires 3 Faulty Thermistor E4 Lower Compartment Thermistor Sensor Error Open or Out of Range Possible Causes 1 Disconnected Broken Wire 2 Shorted Thermistor Wires 3 Faulty Thermistor Any E error codes could possibly be the fault of a power surge a low voltage condition or some type of pow...

Page 30: ...Section 5 Mechanical System Components 2010 Viking Preferred Service SMR 0005 ...

Page 31: ...er See figures 12 4 Step 3 Remove the two Phillips screws and remove the front grille See figure 12 5 Step 4 To loosen the front of the mechanical assembly remove both Phillips screws that secure the front corners See figure 12 6 Step 5 CAUTION See figures 12 7 12 8 before sliding out the mechanical assembly please read the fol lowing carefully To avoid kinking of any system tubing do not slide th...

Page 32: ...tance between any two terminals signifies an open winding e Check continuity between compressor terminals and the compressor itself Scrap off a little paint on compressor to make sure that resistance can be measured If continuity is obtained the com pressor is grounded and needs to be replaced 5 2 1 Removal of the Compressor 1 Remove all screws around the perimeter of the cabinet Do not remove the...

Page 33: ...e three sleeves where the carriage bolts are located 4 Mount the compressor into position on the mechanical base plate 5 Install the three washers and lock nuts and tighten snuggly into place Do not over tighten 6 Install and solder a new filter drier 7 Remove rubber plugs from compressor tube stubs 8 Install and solder a new process tube to compressor 9 Install and solder the discharge line into ...

Page 34: ...rews that secure the front corners See figure 12 6 5 CAUTION See figures 12 7 12 8 before sliding out the mechanical assembly please read the following carefully To avoid kinking of any system tubing do not slide the mechanical section for ward farther then 6 maximum Doing so may kink any or all of the following discharge line at the com pressor suction line at the compressor suction line as it ex...

Page 35: ...ew filter drier 5 Install the condenser fan assembly 6 Carefully slide mechanical base plate assembly back under cabinet 7 Screw mechanical base plate assembly to cabinet See figures 12 4 and 12 6 8 Evacuate change and leak check system 9 Replace front grille See figure 12 5 back panel and power cord grommet See figure 12 3 SEE PHOTO SECTION FOR REFERENCE TO ABOVE MENTIONED FIGURES 30 2010 Viking ...

Page 36: ...llips screws and remove the front grille See figure 12 5 4 To loosen the front of the mechanical assembly remove both Phillips screws that secure the front corners See figure 12 6 5 CAUTION See figures 12 7 12 8 before sliding out the mechanical assembly please read the following carefully To avoid kinking of any system tubing do not slide the mechanical section for ward farther then 6 maximum Doi...

Page 37: ... Install and solder a new filter drier 4 Install and solder a new process tube to compressor 5 Install and solder the suction line into compressor 6 Carefully slide mechanical base plate assembly back under cabinet 7 Screw mechanical base plate assembly and front grille to cabinet See figures 12 4 12 5 and 12 6 8 Evacuate change and leak check system SEE PHOTO SECTION FOR REFERENCE TO ABOVE MENTIO...

Page 38: ...Section 6 Structural Components 2010 Viking Preferred Service SMR 0005 ...

Page 39: ...ase towards the body of the plug and gently pull back and away from the connec tion Step 4 Slide divider assembly out and remove Step 5 Remove screws that secure the channel rails on the left and right hand sides of liner See figure 12 20 Step 6 Disconnect the two Molex connectors located in the top left corner of the upper compartment See figure 12 21 Use the method in Step 3 to release plug Step...

Page 40: ...e Step 3 When re installing the divider it is pertinent that the divider is sandwiched between both the side and rear channel rails This is necessary to obtain proper assembly and to obtain proper perfor mance of the wine cellar A putty knife with a 6 blade will help the assembly process by insert ing it between the rear divider surface and the inside of the back channel flange Gradually work the ...

Page 41: ...e loosened the height of the door can be adjusted Align the top of the door so that it appears parallel to the cabinet top Tighten the 20 screws Note The top of the door will not set as high as the top of the cabinet but it will appear that both cabinet and door are aligned the same 6 4 Leveling Legs There are a total of four 4 leveling legs one on each bottom corner of the cabinet Lift each corne...

Page 42: ...Section 7 Electrical Components 2010 Viking Preferred Service SMR 0005 ...

Page 43: ... perimeter of the cabinet Do not remove the screws in the slotted area See figure 12 3 2 To loosen the rear of the mechanical assembly remove both hex screws at each lower back corner See figures 12 4 3 Remove the two Phillips screws and remove the front grille See figure 12 5 4 To loosen the front of the mechanical assembly remove both Phillips screws that secure the front corners See figure 12 6...

Page 44: ... temperature On Compressor Condenser Fan Compartment Fan Off Heater Fan At cut out temperature Off Compressor Condenser Fan Compartment Fan Heater Fan The compressor and condenser fan cycle on and off together The compressor has a minimum off time of five 5 minutes A call for cooling in either compartment will activate the compartment fan The other compartment fan will not run if there is no call ...

Page 45: ...n will de energize The compartment heater fan for that compartment will then energize The compressor and condenser fan will continue to run if the other compartment is still calling for cool ing 7 1 3 1 Heater Fan Operation Typical compartment call for heat cycle At cut in temperature On Heater Fan Off Compressor Condenser Fan Compartment Fan At cut out temperature Off Compressor Condenser Fan Com...

Page 46: ... connection at top left hand corner See figure 12 21 3 Lower compartment The Molex connector for the lower heater fan is located behind the heater fan assembly After removing the hex head screws pull assembly away from the liner reach behind and disconnect at Molex connector 4 Reverse above steps to replace SEE PHOTO SECTION FOR REFERENCE TO ABOVE MENTIONED FIGURES 41 2010 Viking Preferred Service...

Page 47: ...stor and E4 for a lower thermistor failure If both thermistors fail the code will be displayed sequentially An audible alarm will also sound six times every minute if either one or both thermistors fail 7 2 1 To Check Thermistor Resistance 1 Disconnect power to the wine cellar and drop the User Interface Control Housing to access the therm istor connections on back side of the board See figures 12...

Page 48: ...1 1 70 2 326 3 9 39 4 743 21 6 71 2 276 4 4 40 4 630 22 2 72 2 227 5 0 41 4 520 22 8 73 2 179 5 6 42 4 413 23 3 74 2 133 6 1 43 4 309 23 9 75 2 088 6 7 44 4 207 24 4 76 2 043 7 2 45 4 108 25 0 77 2 000 7 8 46 4 012 25 5 78 1 958 8 3 47 3 919 26 1 79 1 917 8 9 48 3 828 26 6 80 1 877 9 4 49 3 739 27 2 81 1 837 10 0 50 3 653 27 8 82 1 799 10 5 51 3 569 28 3 83 1 762 11 1 52 3 487 28 9 84 1 725 11 7 5...

Page 49: ...on cables Step 10 Gently press downward on the handle of the screwdriver This will unlatch the channel seam Remove the screwdriver and continue opening the channel by running a finger along the open seam towards the rear until completely unlatched Step 11 Remove the upper thermistor cable from the channel and remove from the black nylon C fastener Step 12 Remove the thermistor cable Step 13 Revers...

Page 50: ...Section 8 Control Components 2010 Viking Preferred Service SMR 0005 ...

Page 51: ...d on the rear of the user interface board This battery supplies power to the memory during off periods Located on the bat tery face is a sticker with the software version written in ink See figure 12 36 The user interface board is only available as an assembly piece which includes the control housing and overlay This is because of possible static issues that might possibly damage the user interfac...

Page 52: ...e the user interface board thermistors compartment fans and heater fans WARNING HIGH VOLTAGE DANGER OF ELECTRICAL SHOCK OR DEATH It is EXTREMELY IMPORTANT TO READ THIS if there is a need to apply power to the main power board for diagnosing DO NOT TOUCH the lower top half of the main power board when energized This is the side opposite from cable connections and contains the transformers heat sink...

Page 53: ...ndex fingers of each hand on the back top rear of the control housing 9 Place the remaining fingers of each hand beneath the control housing 10 Simultaneously pull the back corners of the control housing forward with the index fingers while holding the bottom edge firmly from underneath with the remaining fingers At this time pull the control housing forward until the back edge clears the cabinet ...

Page 54: ...Section 9 Wiring 2010 Viking Preferred Service SMR 0005 ...

Page 55: ...HT WHT TAN GRN YEL GND GND BLK RED WHT VLT WHT YEL BLK RED HEATER 12V DC MICRO FAN 12V DC MICRO FAN 12V DC CONDENSER FAN POWER CORD GND GRN WHT RED RED WHT WHT YEL START CAPACITOR MAIN BOARD AIR SENSE LOWER AC LIGHT AC LIGHT DATA COMM CABLE HEATER 12V DC AIR SENSE LOWER AIR SENSE UPPER LOWER COMPARTMENT UPPER COMPARTMENT USER INTERFACE 50 2010 Viking Preferred Service SMR 0005 ...

Page 56: ...K ORG BLK BLUE ORG RED BLK RED 18 16 14 12 10 8 6 4 17 15 13 11 9 7 5 3 2 1 VDA 12V VCC 5V COMP COMP SENSE COND FAN COND SENSE HEATER 1 CTRL HEATER 1 SENSE HEATER 2 SENSE HEATER 2 CTRL FAN 1 CTRL FAN 1 SENSE FAN 2 CTRL FAN 2 SENSE LI G HT CTRL GND GND GND VCC 5V VDA 12V COMP COMP SENSE COND FAN COND SENSE HEATER 1 CTRL HEATER 1 SENSE HEATER 2 CTRL HEATER 2 SENSE FAN 1 SENSE FAN 1 CTRL FAN 2 CTRL F...

Page 57: ...52 J110 J111 J112 J2 J1 J4 J7 J3 9 3 Main Power Board 2010 Viking Preferred Service SMR 0005 ...

Page 58: ...9 4 User Interface 53 2010 Viking Preferred Service SMR 0005 ...

Page 59: ...Section 10 Reference Charts 2010 Viking Preferred Service SMR 0005 ...

Page 60: ...1 3 569 28 3 83 1 762 11 1 52 3 487 28 9 84 1 725 11 7 53 3 407 29 4 85 1 690 12 2 54 3 330 30 0 86 1 655 12 8 55 3 254 30 5 87 1 621 13 3 56 3 180 31 1 88 1 588 13 9 57 3 109 31 6 89 1 556 14 4 58 3 039 32 2 90 1 524 15 0 59 2 971 32 7 91 1 493 15 5 60 2 904 33 3 92 1 463 16 1 61 2 840 33 9 93 1 434 16 7 62 2 776 34 4 94 1 405 17 2 63 2 715 35 0 95 1 377 Unplug thermistor from connection at rear ...

Page 61: ...5 40 35 1 37 45 40 1 41 7 50 45 5 46 7 55 51 2 52 60 57 4 57 7 65 64 1 63 8 70 71 1 70 2 75 78 7 77 80 86 7 84 2 85 95 3 91 8 90 104 3 99 8 95 114 108 100 124 2 117 105 135 127 110 146 4 136 115 158 4 147 120 171 2 158 125 184 6 169 130 198 7 181 135 213 6 194 140 229 2 207 145 245 5 220 150 262 9 234 10 2 Pressure Temperature Chart 2010 Viking Preferred Service SMR 0005 ...

Page 62: ... door is closed Display Lighting The display lighting can be enabled with the door closed by pressing the LIGHT key Display lighting stays on continuously Sabbath Mode Press and hold the SET key while pressing the F C key four 4 times in seven 7 seconds The display will flash SA seven 7 times then the unit will enter Sabbath Mode The display audible alarms message center and lights will be disable...

Page 63: ...or Viking Customer Service if any of these codes are displayed Service Diagnostics Mode enables service technicians to identify the firmware and software versions test status of model specific system components and sensors and change the state of components where applicable i e compres sor on off etc While in Service Diagnostics Mode tests are incremented by pressing the SET key and specific compo...

Page 64: ...Section 11 Trouble Shooting Guide 2010 Viking Preferred Service SMR 0005 ...

Page 65: ... Sabbath Mode is not engaging Set keypad was not depressed and held firmly while pressing the WARMER keypad 4 times within 7 seconds Depress and hold SET keypad firmly while press ing the WARMER keypad 4 times within 7 seconds Audible beep will sound at every key stroke Sabbath Mode is not disabling Set keypad was not depressed and held firmly while pressing the WARMER keypad 4 times within 7 seco...

Page 66: ...ke Service Diagnostics Mode is automatically disabled After 5 minutes of no keypad functions the Diagnostics Mode will automatically disable Re enter the diagnostics mode to continue Compartment temperature to warm Frosted evaporator coil Compartment fan not working Return air damper not closing tape securing damper has come loose Heater fan assembly not disabling Air leak at rear of cabinet Bad d...

Page 67: ...on Check incoming power supply This condition could cause an E2 error Bad capacitor replace Frost buildup in divider Older version of software is installed Evaporator is not clearing during defrost No air flow Condensation has built up and frozen Plugged evaporator drain Install version 1 9 software Check for bad compartment fan Look for warm air leak at all tubing and wiring portals Look for inte...

Page 68: ...Section 12 Reference Photos 2010 Viking Preferred Service SMR 0005 ...

Page 69: ...wer Compartment Figure 12 2 Control box User interface and display Serial plate Wood shelf trim Compartment divider Wood shelf trim Condenser air intake Condenser air baffle Condenser air exhaust Front grille 64 2010 Viking Preferred Service SMR 0005 ...

Page 70: ...Wiring diagram Back panel Ventilation louver Remove screws to loosen mechanical base 1 screw is located at each lower corner in back of cabinet Back Shroud 65 Screws around perimeter of cabinet Slotted area do not re move screws Grommet 2010 Viking Preferred Service SMR 0005 ...

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Page 73: ...View of compressor electrical cover Figure 12 9 Figure 12 10 View of compressor electricals Removing compressor electrical cover Run capacitor Overload Relay 68 2010 Viking Preferred Service SMR 0005 ...

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Page 82: ... 26 Figure 12 27 Return air intake for lower compartment Return air channel To reinstall make sure there is a small piece of tape holding the divider assembly together A 6 putty knife will aid when installing the divider 2010 Viking Preferred Service SMR 0005 ...

Page 83: ...78 View of handle stand off Figure 12 28 Front view of handle stand off mounting stud Figure 12 29 Handle Stand off Set screw Stand off stud Phillips head screw 2010 Viking Preferred Service SMR 0005 ...

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Page 85: ...y Figure 12 32 Figure 12 33 View of main power board front grille Hinge Hinge pin Hinge Adapter Front grille re moved Main power board inside control box Screws securing power board housing 80 2010 Viking Preferred Service SMR 0005 ...

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