Viking VUWC140 Service Notebook
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Viking VUWC140 Service Notebook

Viking VUWC140 Service Notebook

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F90571
F90571

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Summary of Contents for Viking VUWC140

  • Page 1 F90571 F90571...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS General Information-------------------------------------------------------------------------------- Most often Misdiagnosed Problem--------------------------------------------------------------- Troubleshooting Guide Interior too Cool or Contents Freezing-------------------------------------- 6 Interior too Warm (Compressor Operates)--------------------------------- 8 Excessive Frost Build-up on Evaporator. (Interior Temperatures Normal and Frost Pattern Uniform.)----------------------------------------- 10 Compressor, Fan and Interior Light do not Function--------------------- 11 Interior Light Functions but Compressor will not Run------------------- 12 Compressor Runs, Fan does not Run------------------------------------------ 12 Fan Runs, but Compressor does not Run------------------------------------- 12...

  • Page 3: General Information

    Most Often Misdiagnosed Problem Sealed refrigeration system leaks are the most often misdiagnosed problem on the Viking all- refrigerator models. The interaction between the evaporator sensing thermostat, the mounting location of the thermostat thermobulb, and a low refrigerant condition within the evaporator, yields a condition in which the cabinet interior air temperature drops below freezing and stored commodities become frozen.
  • Page 4 The rest of the problem is the “unique” way, some call it the “backwards” way, that the Viking all refrigerator models react to a low refrigerant volume condition.

  • Page 5: Interior Too Cool Or Contents Freezing

    Also, if this is the leak source, replace the evaporator assembly. Hopefully, this information will help you properly diagnose sealed refrigeration system leak conditions which you encounter on Viking all-refrigerator models in the field. When these problems are properly diagnosed and promptly repaired, the customer, the service technician and Viking all benefit.
  • Page 6 PROBLEM CHECK POSSIBLE CAUSE REMEDY c. Thermostat 1. Mounting location 1. Relocate thermo-bulb (compressor incorrect. Model to proper location control) VUCW should be thermo-bulb on the right wing mounting of the evaporator or routing. plate. All other models mount at rear top center of the evaporator.

  • Page 7: Interior Too Warm (Compressor Operates)

    PROBLEM CHECK POSSIBLE CAUSE REMEDY e. Placement of 1. If white rubber “shelf 1. Properly place the glass glass shelves bumper” do not space shelves in the unit. White in cabinet the glass shelf out away rubber “shelf bumper” from the molded inner- must be placed so as to liner shelf supports on create an air space gap...
  • Page 8 PROBLEM CHECK POSSIBLE CAUSE REMEDY c. High and low 1. Compressor valve failure, 1. Replace compressor and side pressure preventing compressor drier, evacuate and in the sealed from developing required recharge with refrigerant system. refrigerant pressures for to the proper amount. system operation.

  • Page 9: Excessive Frost Build-Up On Evaporator. (Interior Temperatures Normal And Frost Pattern Uniform.)

    PROBLEM CHECK POSSIBLE CAUSE REMEDY e. Condenser fan 1. Condenser fan blade 1. Free condenser fan blade operation. jammed against shroud so it rotates freely. or otherwise bound. 2. Wiring connection to 2. Correct loose or incorrect and from fan motor, wiring connections.

  • Page 10: Compressor, Fan And Interior Light Do Not Function

    PROBLEM CHECK POSSIBLE CAUSE REMEDY 4. Air leaks around door 4. Reform gasket using heat gasket due to physical to achieve a complete contour of gasket. seal. 5 Door gasket torn or has 5. Replace gasket if stiff lost magnetism. or has weak magnetism.

  • Page 11: Interior Light Functions But Compressor Will Not Run

    PROBLEM CHECK POSSIBLE CAUSE REMEDY 5. Interior a. Compressor 1. Compressor control 1. Replace compressor light functions control thermostat. control thermostat. but compressor thermostat. will not run. 2. Wiring connections 2. Correct loose or incorrect from compressor control wiring connections. Thermostat to terminal Block loose or incorrect.

  • Page 12: Thermostat Specifications

    PROBLEM CHECK POSSIBLE CAUSE REMEDY b. Light activation 1. Failed light activation 1. Replace light activation switch. switch. switch. c. Wiring 1. Improperly wired bypass 1. Correct improper wiring connection to switch or over-ride connections and from light switch. activation switch and over-ride switch.

  • Page 13: Wiring Diagram

    WIRING DIAGRAM VUAR—VUWC WIRING DIAGRAM VUBD—VRBD F90571...

  • Page 14: Appendix: Solid State Control

    APPENDEX: INSTRUCTIONS FOR FIELD INSTALLATION SOLID STATE AC CONTROLS ON VUAR140 / VRBD / VUBD / VUAR150 / VUWC150 ONLY TOOLS NEEDED: 5/16” NUT DRIVER AND PHILLIPS SCREW DRIVER 1. Before working on the unit unplug it first. shown in the supplied drawing. 2.

This manual is also suitable for:

Vuwc150Vuar140Vuar150VrbdVubd

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