Viking VCFB304 Service Notebook
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Viking VCFB304 Service Notebook

Viking VCFB304 Service Notebook

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F90612

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Summary of Contents for Viking VCFB304

  • Page 1 F90612...
  • Page 2 VIKING RANGE CORPORATION, P. O. DRAWER 956, GREENWOOD, MS.38930 USA F90612...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS WARNINGS---------------------------------------------------------------------------------- 3 General Specifications------------------------------------------------------------------------ 3 VCC Compressor Specs (All Freezer)------------------------------------------------------- 4 VCC Compressor Specs (All Refrigerator)------------------------------------------------- 5 Equipment and Tools-------------------------------------------------------------------------- 6--11 Display Panel Operations-------------------------------------------------------------------- 12-13 Keyboard Layout------------------------------------------------------------------------------ 14 Functional Description------------------------------------------------------------------------ 14 Temperature Control Operation (Thermistors)-------------------------------------------- 15 Factory Set Freezer and Refrigerator settings---------------------------------------------- 16 Program Mode---------------------------------------------------------------------------------- 16 Mode A and Mode B Functions----------------------------------------------------------- Temperature Offset Calibration------------------------------------------------------------...

  • Page 4: Warnings

    WARNINGS To avoid electrical shock, which can cause severe personal injury or death, disconnect power to the refrigerator using power switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure correct earthing and polarization. After servicing, reconnect power using power switch. General Specifications Model **FB304# **RB304# **FB364# **RB364#...
  • Page 5 VCC COMPRESSOR SPECIFICATIONS (All Freezer) Viking Application – AF 36/30 VEGY8H Model # -- AF 36/30 VEGY8H Inverter # -- AF 36/30 PE970449 Nominal BTU/HR –AF 36 --AF 30 BTU/HR Range – AF 36/30 450 / 1090 Nominal Watts – AF 36 -- AF 30 Watt Range –...
  • Page 6 VCC COMPRESSOR SPECIFICATIONS ( All Refrigerator) Viking Application –AR 36/30 VEGY8H Model # -- AR 36/30 VEGY6H/PM910458 Inverter # -- AR 36/30 PE970449 Nominal BTU/HR –AR 36/30 BTU/HR Range – AR 36/30 330/965 Nominal Watts – AR 36/30 Watt Range –AR 36/30...

  • Page 7: Equipment And Tools

    EQUIPMENT AND TOOLS A separate set of hoses and hand valves must be maintained for use with sealed systems with R134a refrigerant. Equipment used with CFC refrigerants will contaminate R134a (HFC) sealed systems. EQUIPMENT DESCRIPTION ILLUSTRATION Tank of Liquid Refrigerant – Care should be taken to be sure the proper refrigerant is available.
  • Page 8 EQUIPMENT DESCRIPTION Purging Hose Configuration – This arrangement of three 4’ to 6’ hoses with low-loss fittings and a ¼” male flare Tee fitting can be used to purge a sealed system for both operating and non-operating compressor situations. No hand valves are required.
  • Page 9 EQUIPMENT DESCRIPTION Swaging Kit – A swaging tool kit may be needed to expand system tubing to fit replacement parts. (Fig. 19) Heat Gun – A heat gun can be used to heat a non-operating compressor or the evaporator during purge and the refrigerant tank to increase charging pressure. Many heat guns have a stand that allows continuous operation while other repairs are made.
  • Page 10 EQUIPMENT DESCRIPTION Inspection Mirror, Tubing Cutter, Triangular File and Steel Brush – The inspection mirror should be small enough to inspect in tight spaces around joints. A mini-cutter will be required to cut tubing in tight spaces where a standard cutter will not turn.
  • Page 11 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. Evacuation and Charging CAUTION: To avoid risk of fire, sealed refrigeration system must be air free.
  • Page 12 Charging: Low side gauge pressure should rise shortly after opening charging cylinder NOTE: Do not use captured or recycled valve as system pressure equalize refrigerant in Viking units. Captured or through capillary tube. recycled refrigerant voids any warranty. pressure does...

  • Page 13: Display Panel Operations

    Display Panel Operation Keyboard Entry Tone Indicates a pad was pressed, command read and accepted. Turn off entry tone be pressing and holding Activate Controls pad for 3 to 5 seconds. Command Accepted Tone Three short tones indicate command accepted. Activate Controls Pad 1.
  • Page 14 Display Panel Operation (Continued) *Hidden Pad* To Activate Program Mode. 1. Open refrigerator door. Note: Located between 2. Press Activate Controls pad. Lower Pad and Display 3. Press Hidden pad. window 4. Within 6 seconds press the following pads in this sequence;...

  • Page 15: Functional Description

    Electronic Functional Description Power Disconnect Switch Use power disconnect switch to disconnect power without unplugging unit. Power disconnect switch is located behind air grille on top right side of the control box assembly. Unit is shipped with power disconnect switch in the run position. Showroom Switch Showroom switch allows electronic controls and interior lights to function independently of refrigeration system.

  • Page 16: Temperature Control Operation (Thermistors)

    Temperature Control Operation For any temperature setting, outputs will be turned off/on based on cut-in/cut-out temperature determined by resistance levels of freezer or refrigerator thermistors Refrigerator and Freezer Thermistor As temperature decreases, resistance increases. As temperature increased, resistance decreases. NOTE: Open thermistor or thermistor circuit will result in failure of unit to cool. Shorted thermistor will cause unit to run 100 percent of time except during defrost cycle.

  • Page 17: Factory Set Freezer And Refrigerator Settings

    Factory set freezer and refrigerator settings PROGRAM MODE Accessing Program Mode Two programming modes are available. Mode A allows reading unit thermistor temperatures and changing duration of compressor run time between defrosts in Conventional Defrost Mode. Mode B is used for all other programmable functions. Open door.
  • Page 18 Mode A Functions (con’t) Freezer Thermistor Temperature Choose Freezer temperature display by pressing Frz Temp pad. Freezer thermistor temperature displays. Refrigerator Thermistor Temperature Choose Refrigerator thermistor Temperature display by pressing Ref Temp pad. Refrigerator thermistor temperature displays. Mode B Functions Automatic Keyboard Functions Activate and deactivate keyboard by toggling Activate Controls pad.

  • Page 19: Temperature Offset Calibration

    Temperature Offset Calibration Offset amounts adjusts temperatures for unit cut-ins and cut-outs by the amount of offset. The chart shows the indicator and the amount of offset from the factory default setting. • Setting Refrigerator Temperature Offset (All Refrigerator Only). Press Ref Temp pad.

  • Page 20: Electronic Testing

    Electronic Testing Electronic Testing Mode Forced Defrost Start (All Freezer Only). Press Activate Controls pad to activate control panel. Simultaneously press and hold Max Ref and Display Off pads for 3 seconds. Forced Compressor Start Press Activate Controls pad to activate control panel. Simultaneously press and hold Alarm Off pad and Display Off for 3 seconds.
  • Page 21 AF-AR **SPECIAL NOTICE** All Viking Electronic Refrigerator Controls with an Adaptor Board In Normal User Mode DISPLAY ON key: If activated, the Display Panel will remain on even after the door is closed. During a Forced Pull Down or Forced Defrost, the single audible sound will not be present.
  • Page 22 Wiring Schematic 30” W. All Freezer...
  • Page 23 AF 30 LIGHT CIRCUITS...
  • Page 24 AF 30 120V CIRCUIT...
  • Page 25 AF 30 SEALED SYSTEM...
  • Page 26 AF 30 ICEMAKER CIRCUIT...
  • Page 27 Wiring Schematic 36” W. All Freezer...
  • Page 28 AF 36 LIGHT CIRCUITS...
  • Page 29 AF 36 120V CIRCUIT...
  • Page 30 AF 36 SEALED SYSTEM...
  • Page 31 AF 36 ICEMAKER CIRCUIT...
  • Page 32 Wiring Schematic 30” W. All Refrigerator...
  • Page 33 AR 30 120V INPUT AR 30 LIGHT CIRCUITS...
  • Page 34 AR 30 SEALED SYSTEM...
  • Page 35 Wiring Schematic 36” W. All Refrigerator...
  • Page 36 AR 36 120V INPUT AR 36 LIGHT CIRCUITS...
  • Page 37 AR 36 SEALED SYSTEM...

  • Page 38: Low Voltage Board Check Points

    Low Voltage Board Check Points To avoid electrical shock, which can cause severe personal injury or death, disconnect power to unit 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 39 ALL MODELS New Control Boards with adapter functionality...

  • Page 41: Icemaker (All Freezer Only)

    Icemaker (All Freezer Only) Before replacing icemaker, use this guide to determine if icemaker is defective To avoid electrical shock, which can cause severe personal injury or death, disconnect power to unit using power switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure correct earth ground and polarization.
  • Page 42 SHUT-OFF ARM AND SWITCH The shut-off arm operates the shut-off switch. During the harvest cycle, the arm is raised and lowered during each of two revolutions by a cam. If ice in storage in keeps arm up, shut- off switch will remain open and stop icemaker at the end of that revolution, shut-off arm can also be manually raised to its locked position to shut off icemaker.
  • Page 43 NORMAL OPERATION The icemaker always starts from and stops at the “park” position. In the park position the ejector blades are pointing horizontally towards the back of the icemaker. Just before reaching the park position the mold is filled with water. At the park position all electrical components are de-energized, even though the shut-off arm is down, and the icemaker is ready for the next freeze cycle.
  • Page 44 Icemaker (Continued) Repair circuit and connections or replace door switch as needed. When there is power, recheck icemaker operation. If there is still not ice, check for water problems next. WATER PROBLEMS CAUTION: Do not use a Reverse Osmosis Water Filtration System. It reduces the water pressure below 20 psi and the icemaker will not fill.
  • Page 45 Icemaker (Continued) Water fill setting too low (less than 6.6 seconds) causing icemaker to cycle too early and is evidenced by hollow ice cubes, ice build-up on the ejector blades, or water freezing in the ice bucket. Increase fill setting by turning the adjustment screw counterclockwise.
  • Page 46 TEMPERATURE PROBLEMS NOTE: Freezer temperatures above normal, 0º ± 2º F (-18º ± 1º C) will slow down the rate of ice production. Increase ice production by setting freezer to colder setting. The freezer temperature must be below 15º F ± 3º F. Otherwise the thermostat will not close, even if ice has formed in the mold.
  • Page 47 Icemaker Troubleshooting Chart Ice Problems Action Jammed cubes (small or oversized cubes) Adjust fill level or level icemaker or refrigerator. Hollow cubes Adjust for low fill, remove restrictions in supply line or level icemaker or refrigerator. Remove obstructions to air flow at fill end so it freezes first.

  • Page 48: Sealed System

    SEALED SYSTEM...

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