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Viking VCBB360L, Service Manual

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Viking VCBB360L Service Manual Download Page 13

 13

Electronic Function Description 

 

                  

WARNING

 

To avoid electrical shock which can cause severe personal injury or death, disconnect power 
to refrigerator using power switch before servicing.  Wires removed during disassembly must 
be replaced on proper terminals to insure correct earth ground and polarization.  After 
servicing, reconnect power using power switch 

 

Refrigeration and Defrost Component Checks Made at High Voltage Board 
 

Low voltage board input 

W1 to D11 

approximately  -25VDC 

 

E10 to E9 (Neutral) or ground 

approximately  120VDC 

 
Compressor/condenser fan motor 

“ON” = E4 to E9 (Neutral) or ground 

approximately  120VDC 

 

“OFF” = E4 to E9 (Neutral) or ground 

 

 
Compressor/condenser fan motor  

“CLOSED” = R7 to ground 

approximately  -11VDC  

relay 

“OPEN” = R7 to ground 

approximately  -25VDC 

 
Evaporator fan motor relay 

“CLOSED” = R8 to ground 

approximately   -11VDC 

 

“OPEN” = R8 to ground 

approximately  -25VDC 

 
Evaporator fan motor 

“ON” =E2 (Neutral) or  ground  

approximately  120VDC 

 

“OFF” = E2 (Neutral) or  ground  

 

    0VDC 

 
Defrost heater 

“ON” = E6 to E9 (Neutral) or ground 

approximately  120VDC  

 

“OFF” = E6 to E9 (Neutral) or ground 

 

    0VDC  

 
Defrost heater relay 

“CLOSED” = R9 to ground 

approximately  -11VDC 

 

“ OPEN” = R9 to ground 

approximately  -25VDC 

 
Defrost terminator 

“CLOSED” =E5 to E9 (Neutral) ground  approximately  120VDC 

 

“OPEN” = E5 to E9 (Neutral) or ground   

    0VDC 

 
DC fan output voltage from 

“ON’ = E1 to ground 

approximately  -25VDC 

high voltage board to fresh food fan 

“OFF” = E1 to ground 

 

   0VDC  

or condensate evaporator fan 
 
DC fan input voltage 

“ON” =R10 to ground 

approximately  -11VDC 

signal to high voltage board from 

“OFF” = R10 to ground 

approximately  -25VDC 

low voltage board for fresh food 
fan and for condensate evaporator 
 
Filament voltage at pin 11 and 12 = less than 5VDC 

 

Summary of Contents for VCBB360L

Page 1: ...SERVICE NOTEBOOK REFRIGERATOR VCBB360R VCBB362R Right VCBB360L VCBB362L Left VIKING RANGE CORPORATION P O DRAWER 956 GREENWOOD MS 38930 USA ...

Page 2: ...tic Complete 15 Wiring Schematic Freezer Compartment 16 Wiring Schematic Refrigeration Compartment 17 Wiring Schematic Refrigerator and Freezer Compartment 18 Wiring Schematic Adaptive Defrost 19 Component Specification 20 Component Testing 23 Troubleshooting Charts 31 System Diagnosis 33 Service Procedures 34 Refrigerant Flow 40 Cabinet Airflow 41 Machine Compartment Air Flow 42 Typical External ...

Page 3: ...r using power switch Refrigerator Center Freezer Compartment Food Compartment Percent Run Cycle 24 hr Average temperature Food Average Kw 24 hr 0 4 Time 10 25 3 F Temperature 3 F Ambient F 65 90 110 65 90 110 65 90 110 65 90 110 65 90 110 1 2 2 3 4 2 28 52 100 30 32 0 39 39 45 3 3 3 Temperature Relationship Test Chart T 3 Suction Average Total Suction Pressure Head Pressure T 1 Outlet 3 F T 1 Inle...

Page 4: ...4 Display Panel Display Panel Keyboard ...

Page 5: ...mperature setting one bar at a time If entry tone is on tone will sound at each bar level until bottom level is reached 1 Turn on temperature setting function of control panel be pressing Colder pad 2 Press and hold Colder pad to lower temperature setting at a faster rate Max Frz Pad Activates Maximum freezer mode setting freezer temperature to coldest setting for 24 hours or until Max Frz pad is ...

Page 6: ...ndicator lights blink if either refrigerator or freezer door is open more than 3 minutes 1 Turn off Door Open alarm by pressing Alarm Off pad or by closing door 2 Deactivate door open alarm be pressing Display On pad and then press and hold Alarm Off pad for 3 seconds 3 Door alarm delay can be adjusted in Program Mode B High Temperature Alarm Alarm sounds and indicator light shows if freezer or re...

Page 7: ...frigerator to run 100 percent of time except for defrost cycle Freezer temperature setting and thermistor value will determine if compressor condenser fan and evaporator fan switches are open or closed Compressor condenser fan switch must be open for 6 minutes before switch can close again compressor dwell time Refrigerator temperature setting and thermistor valve will determine if fresh food fan ...

Page 8: ... defrost cycle is lowered to next level If defrost length is between 21 and 24 minutes CRDT for next defrost cycle remains the same Initial value at power up CRDT is 4 hours Vacation Mode CRDT equals 96 hours Vacation Mode CRDT is interrupted with door openings Defrost interval will revert back to interval before vacation mode Three things must occur to reach Vacation Mode CRDT 1 Defrost interval ...

Page 9: ...dicator light 9 Light glows to show negative value Freezer Thermistor Temperature 1 Choose freezer thermistor temperature display be pressing Freezer Temp pad 2 Freezer thermistor temperature displays Refrigerator Thermistor Temperature 1 Choose refrigerator thermistor temperature display be pressing Ref Temp pad 2 Refrigerator thermistor temperature displays Mode B Functions Automatic Keyboard Fu...

Page 10: ...or will glow Press Warmer pad to move offset to the next warmer setting Press Colder pad to move offset to the next colder setting Factory default freezer offset is 0 Defrost Mode Selection Toggle pad to select adaptive or conventional defrost mode Vacation indicator glows when adaptive defrost has been selected If vacation indicator is off conventional defrost is selected Conventional defrost use...

Page 11: ...voltage board With refrigerator door open refrigerator light ON reading should be 120 VAC With door closed refrigerator light OFF reading should be approximately 0 VAC If voltage does not change with light switch and light is turning light off and on red white wire is broken between switch and high voltage board 2 Check for voltage on terminal E7 on high voltage board Output voltage should toggle ...

Page 12: ...ch can cause severe personal injury or death disconnect power to refrigerator using power switch before servicing Wires removed during disassembly must be replaced on proper terminals to insure earth ground and polarization After servicing reconnect power using power switch ...

Page 13: ...round approximately 25VDC Evaporator fan motor relay CLOSED R8 to ground approximately 11VDC OPEN R8 to ground approximately 25VDC Evaporator fan motor ON E2 Neutral or ground approximately 120VDC OFF E2 Neutral or ground 0VDC Defrost heater ON E6 to E9 Neutral or ground approximately 120VDC OFF E6 to E9 Neutral or ground 0VDC Defrost heater relay CLOSED R9 to ground approximately 11VDC OPEN R9 to...

Page 14: ...severe personal injury or death disconnect power to refrigerator using power switch before servicing Wires removed during disassembly must be replaced on proper terminals to insure correct earth ground and polarization After servicing reconnect power using power switch ...

Page 15: ...ere personal injury or death disconnect power to refrigerator using power switch before servicing Wires removed during disassembly must be replaced on proper terminals to insure correct earth ground and polarization After servicing reconnect power using power switch ...

Page 16: ...ry of Operation As a freezer thermistor warm the resistance decreases allowing low voltage signal to be sent to electronic control Electronic control sends two low voltage signals one to the compressor relay coil C1 and one to the evaporator relay coil E1 When both relay coils are energized and both relay contacts are closed high voltage circuits to evaporator fan motor and compressor condenser fa...

Page 17: ...s fresh food thermistor warms resistance decreases allowing low voltage signal to be sent to the electronic control Electronic control sends a low voltage signal to semiconductor switch for DC fresh food fan and DC condensate evaporator fan Both fans begin operating Fresh food fan circulates freezer air into fresh food compartment Condensate evaporator fan circuilates air over condensate drain pan...

Page 18: ...zer Thermistor in Temperature Control Section and the electronic signals for compressor condenser fan motor operation and for operation of fresh food and condensate evaporator fans After freezer thermistor cools sufficiently to raise resistance and block the signal to the electronic control compressor condenser fan motor will shut off However fresh food and condensate evaporator fans will continue...

Page 19: ...frigeration cycle is interrupted and electronic control sends a low voltage signal to defrost relay coil def D1 Powering the relay coil closes contact D1 completing high voltage circuit to defrost heater through closed defrost terminator closes at 15 F Isolator which is part of high voltage PC board recognizes presence of line voltage to defrost heater and sends low voltage signal to electronic co...

Page 20: ...lt 120VAC Wattage 450 5 W Resistance 30 5 Ω Heater Mullion Volt 120VAC Wattage 20Watts Resistance 661 7 5Ω For service use only foamed in place Not powered from the factory To connect mullion heater to power 1 Disconnect power to unit using power switch 2 Remove toe grille Locate water valve wiring harness 3 Carefully slit wiring harness vinyl sleeve to expose one black and one white lead bent wit...

Page 21: ...n facing shaft Counterclockwise evaporator fan RPM 3300 RPM Watt 1 4 Watts Overload Volt 120VAC Ult Trip amps 158 F 70 C 3 51 Amps Close temperature 142 F 61 C 9 Open temperature 257 F 125 C 5 Short time trip seconds 10 seconds Short time trip amps 77 F 925 C 14 amps Relay Resistance with power off check across terminals 2 3 3 12 Ω Shorted 0 Ω Open very high or infinite ohms Switch auger Type DPST...

Page 22: ... Amps Thermister Check resistance across Terminals Bell curve Resistance see page 13 77 F 30 000 ohms 1 ohms 45 F 68 000 ohms 2 ohms Thermostat Volt 120VAC Watt 1000 Watts Current 10 Amps Resistance across terminals Above 55 F 6 F Open Below 20 F 8 F Closed Between 55 F 6 F And 20 F 8 F Will stay in current state either Open or closed until either 55 F 6 F and 20 F 8 F is reached Valve water Volt ...

Page 23: ... 0 ohms and slowly moves back to infinity Open needle does not move Replace capacitor Shorted needle moves to zero and stays replace capacitor High resistance leak needle jumps toward 0 and then moves back to constant high resistance not infinity Capillary tube Capillary is sized in diameter and Restricted or clogged capillary tube must be replaced with length to feed proper amount tube of same in...

Page 24: ...open due to high resistor for 1 minute locked rotor run winding current 3 Remove compressor leads and use an ohmmeter set on highest scale With shorted relay or capacitor 4 Touch one lead to compressor body clean point of contact compressor will start and overload and the other probe to each compressor terminal If a Protector will quickly open due to reading is obtained compressor is grounded and ...

Page 25: ...one piece discharge side of compressor copper tube except for brazed joint visible in machine transfer heat absorbed by refrigerant to ambient Higher pressure gas is routed For Minute Leaks to condenser where as gas 1 Separate condenser from rest of refrigeration system and temperature is reduced gas pressurize condenser up to a maximum of 9 65 bars 140psi condenses into a high pressure with a ref...

Page 26: ...aze remaining part of drier Remove drier from system 7 Discard drier in safe place Do not leave drier with customer If refrigerator is under warranty old drier must accompany warranty claim Evaporator Inner volume of evaporator Test for leaks in evaporator with electronic leak detector or with allows liquefied refrigerant soap solution Compressor oil is circulated with refrigerant check discharged...

Page 27: ...ad specified watts according to Technical Data Sheet 5 F thermostat should interrupt power to heater Heater mullion For service use only to reduce condensation on center mullion Heater formed in place Not To connect mullion heater to power powered from the factory 1 Disconnect power to unit using power switch 2 Remove ice grille 3 Remove bracket holding condenser evaporation fan and water valve 4 ...

Page 28: ...tacle terminal which pushes onto temperature is sensed Compressor common terminal At ambient room temperature Overload protector should have less than 1 ohm resistance After overload opens reset An open overload protector will have infinite resistance can require up to two hours depending on ambient temperature and residual heat load in compressor Relay See PTC Relay Relay PTC When voltage is conn...

Page 29: ...oblems that appear to be caused by electronic control Switch NO Interrupts connection to ice Check resistance across terminals maker when freezer door is Switch arm depressed closed open Switch arm not depressed open Switch NC Completes circuit to allow Check resistance across terminals indicated function See tech Switch arm down sheet and wiring diagram for NC terminals closed individual switch N...

Page 30: ...ell curve resistance chart at given temperature Thermostat Thermostat is in a series circuit With power off and evaporator coil below freezing with high voltage board and thermostat should check continuous when checked defrost heater with ohmmeter See Heater evaporator defrost section for additional tests Controls the circuit through defrost terminator to defrost heater Opens and breaks circuit wh...

Page 31: ...nges Replace gasket Dirty condenser Clean condenser Refrigerator airflow Check airflow grille for obstructions Adjust as necessary Check airflow fan Replace if faulty Interior light remains on Check switch Replace if necessary Faulty condenser fan or evaporator Check fan switch fan and wiring Replace if necessary fan Faulty compressor Check intake valve Replace compressor Refrigerator Refrigerator...

Page 32: ...otor Replace if defective evaporator Defrost heater remains open Check defrost heater continuity Replace if faulty Defrost thermostat faulty Check defrost thermostat and replace if faulty Open wire to connector Check wiring and connections Repair as necessary Refrigerant shortage or restriction Check for leak or restriction Repair evacuate and recharge system Unit starts and Loose wire or thermost...

Page 33: ... Overcharge Increase Increase Warmer Warmer Colder Increase Refrigerant Shortage Decrease Decrease or Colder Warmer Warmer Decrease Increase Restriction Symptoms Partial Restriction Decrease Decrease or Colder Warmer Warmer Decrease Increase Restriction Symptoms Air in System Near Normal Increase Warmer Warmer Warmer Increase Low Ambient Decrease Decrease Colder Warmer Warmer Decrease Installation...

Page 34: ...te holes pierced in tubing Do not leave mechanical access valves on system Valves eventually will leak Molecules of HFC134a are smaller than other refrigerants and will leak where other refrigerants would not Swagging tools Flaring tools Flux Sil flos Silver solder Oil for swagging and flaring Copper tubing Dry nitrogen 99 5 minimum purity with 40 F or lower dew point Crimp tools Tube bender Micro...

Page 35: ...f nitrogen through gauge manifold to process tube of compressor and liquid line strainer 2 Open valves on nitrogen cylinder and gauge manifold Allow pressure to build within sealed system 3 Check for leaks using soap suds If leak is detected in tubing replace tubing If leak is detected in either coil replace faulty coil Restrictions Symptoms Restrictions in sealed system most often occur at capill...

Page 36: ...frigerant voids any Viking and or compressor manufacturer s warranty NOTE Charge system with exact amount of refrigerant See Technical Sheet or refer to unit nameplate for correct refrigerant charge Inaccurately charged system will cause future problems Evacuation and Charging To avoid risk of fire sealed refrigeration system must be air free To reduce risk of air contamination follow evacuation p...

Page 37: ... If pressure does not equalize a restriction typically exists at capillary drier braze joint 4 If pressure equalizes open valve E to low side manifold gauge and pinch off high side drier process tube 5 Start compressor and draw remaining refrigerant From charging hoses and manifold into compressor through compressor process tube 6 To check high side pinch off drier process tube Close valve D to hi...

Page 38: ...are virtually no different than those for CFC12 Health Safety and Handling CFC12 HFC134a Allowable overall exposure limit 1 000ppm Same Vapor exposure to skin No effect Same Liquid exposure to skin Can cause frostbite Same Vapor exposure to eye Slight eye irritant Same Liquid exposure to eye Can cause frostbite Same Above minimum exposure limit Can cause Asphyxia Same tion Tachycardia and Cardia A...

Page 39: ... 32 zinc Use with fluoride based flux Recommended brazing temperature is approximately 1200 F Steel to steel joints SILVER SOLDER See copper to steel joints Brass to copper joints SILVER SOLDER See Copper to steel joints Brass to steel joints SILVER SOLDER See copper to steel joints Checking Electric Heater Assembly 1 Disconnect power to unit 2 Ensure heater element is cold then remove suspect hea...

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Page 41: ...41 ...

Page 42: ...42 ...

Page 43: ...43 ...

Page 44: ...ead screws 3 Disconnect leads 4 Remove fan by removing hex head screws Refrigerator Light Switch An offset or ratchet 1 point Phillips driver is required 1 Remove air discharge grille 2 Remove 2 Phillips screws securing switch to top door hinge Refrigerator Light Socket 1 Remove cover by removing four hex head shoulder screws and sliding cover to rear 2 Remove bulbs 3 Remove four hex head screws o...

Page 45: ...Evaporator Fan 1 Remove toe grille 2 Remove two hex head screws holding valve bracket assembly to fan bracket 3 Remove two hex head screws holding fan bracket to left front roller assembly 4 Unplug fan leads from wiring harness 5 Remove two bolts at fan corners mounting fan on bracket Water Valve 1 Remove toe grille 2 Disconnect water supply 3 Disconnect and remove outlet waterline 4 Remove two he...

Page 46: ...cess 2 Remove nut from motor shaft 3 Remove fan blade Replace rubber washer behind fan blade when reassembling Condenser Fan Motor 1 See Condenser Fan Blade 2 Remove three hex head screws retaining shroud to machine compartment 3 Access mounting screws by rotating shroud front to right 4 Remove three hex head screws 5 Unplug 2 pin wire harness Pre condenser Pan Loop 1 Remove toe grille 2 Remove dr...

Page 47: ... T Thermostat connection L L1 side of line V Water valve connection Specifications Mold Heater 185 watts 264 ohms Thermostat Close 17 3 F 8 1 C Bimetal Open 32 3 F 0 1 C Water Fill 140cc 7 5 seconds Motor Cycle Stamped in circuit Plug in connectors One revolution of blades takes 3 minutes plug stall time on ice eject and water fill Test Procedures Verify icemaker has power shut off arm is down and...

Page 48: ...nnect power using power switch Module Motor and Support Assembly 1 Loosen both screws in module access ports 2 Disconnect shut off arm 3 Pull mold from support assembly Remove module only by removing 3 screws and pulling module out of housing Shut Off Arm 1 Pull shut off arm out from white bushing 2 Replace by pushing completely in 3 Follow steps below Module and Heater Assembly 1 Remove module an...

Page 49: ...otor is defective Shut off arm must be in on position There are several slotted shafts on motor assembly board Do not insert screwdriver and attempt to turn shafts Slots permit assembly only There are non repairable and non replaceable components in module When diagnosing or repairing icemaker do not remove module unless replacing module Water Fill Adjustment Turning water level adjustment screw w...

Page 50: ...perature Problems Freezing temperatures above normal 0 2 F 18 1 C will slow down ice production Increase ice production by setting freezer to coldest setting Thermostat cycling temperature 1 revolution icemaker is 17 3 F 8 1 C Ice will freeze when these temperatures are achieved Cycling time will be slower if freezer temperature is not cold enough to achieve mold temperature easily Thermostat mold...

Page 51: ...ly proportional to length of time water valve switch is held closed by timing cam Inside valve is a flow washer which acts as a water pressure regulator Proper icemaker fill is 140cc 10cc at 7 5 seconds of water fill at an inlet pressure ranging from 20 to 120 psi 1 4 to 8 2 bar Wire Harness A non resettable thermal fuse micro device 170 F 78 C is spliced into red wire of icemaker wiring harness E...

Page 52: ...gged water valve Replace water valve No power to water valve Determine discontinuity by tracing power Low water pressure Short T and H test points for 10 seconds Remove jumpers Catch water in glass Increase water pressure to 20 120 1 4 8 2 bar 140cc s Open heater circuit Replace mold and heater assembly Closed thermostat Replace thermostat Damaged heater tulips on module Replace module Short heate...

Page 53: ...alumilastic Thermostat out of calibration Replace thermostat Apply alumilastic Open heater circuit Replace mold and heater assembly Motor should oscillate Apply alumilastic Little or not alumilastic on thermostat Apply alumilastic to thermostat Heater not staked in mold Replace mold and heater assembly Apply alumilastic Broken locking tabs on vertical cam Replace module 6 00 Ejector Position Conta...

Page 54: ...ation Replace thermostat Apply alumilastic Jammed cube stalled in water fill cycle Remove cube Determine reason for stall Leaky water valve Replace water valve Excessive water fill volume Replace water valve Motor stalled in water fill cycle Replace module 12 ejector position Contaminated module Replace module Refrigerator or ice maker not level Level refrigerator or ice maker Excessive water pres...

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Page 56: ...a Microsoft Templates Normal dot Title Subject Author Viking Range Keywords Comments Creation Date 10 24 2001 2 09 PM Change Number 3 Last Saved On 3 28 2003 3 54 PM Last Saved By Ken Sievert Total Editing Time 3 Minutes Last Printed On 3 28 2003 6 03 PM As of Last Complete Printing Number of Pages 1 Number of Words 2 approx Number of Characters 17 approx ...

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