Vulcan-Hart VC4G Service Manual
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Vulcan-Hart VC4G Service Manual

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This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified.
This manual is not intended to be all encompassing. If you have
not attended a Vulcan Service School for this product, you should
read, in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
The reproduction, transfer, sale or other use of this Manual,
without the express written consent of Vulcan, is prohibited.
This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.
A product of Vulcan-Hart
SERVICE MANUAL
VC4G & VC6G SERIES FULL SIZE
CONVECTION OVENS
- NOTICE -
3600 North Point Blvd Baltimore, MD 21222
VC4GS
ML-126610
VC4GD
ML-126611
VC4GC
ML-136494
VC6GS
ML-126612
VC6GD
ML-126613
VC6GC
ML-136495
F24682 Rev. D (1016)

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Summary of Contents for Vulcan-Hart VC4G

  • Page 1 SERVICE MANUAL VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS VC4GS ML-126610 VC4GD ML-126611 VC4GC ML-136494 VC6GS ML-126612 VC6GD ML-126613 VC6GC ML-136495 - NOTICE - This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified.

  • Page 2: Table Of Contents

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS TABLE OF CONTENTS SERVICE UPDATES ..................4 SERVICE UPDATES - VC4G / VC6G .
  • Page 3 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS COMPUTER CONTROL (VC4GC/VC6GC) ............. 35 OPERATION .

  • Page 4: Service Updates

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE UPDATES SERVICE UPDATES SERVICE UPDATES - VC4G / VC6G October 2016 • Parts catalog form number added to REFERENCE INFORMATION under GENERAL. • GAS VALVE PRESSURE CHECK (units after February 2015) added pictures to show the correct gas cap position for natural and propane gas.

  • Page 5: General

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - GENERAL GENERAL INTRODUCTION Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any model unless the picture or illustration needs to be model specific.

  • Page 6: Tools

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - GENERAL Input BTU Rating Natural Gas - 44,000 BTU input at 3.5 in. W.C. Units after Serial Number Break (VC4GD 481835388, VC6GD 481835406, VC4GD 541077665) Natural Gas - 50,000 BTU input at 5.0 in. W.C.

  • Page 7: Removal And Replacement Of Parts

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS Disconnect the electrical power to the machine and follow lockout / tagout procedures. SHUT OFF THE GAS BEFORE SERVICING THE UNIT.

  • Page 8: Control Panel Components

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS CONTROL PANEL COMPONENTS Disconnect the electrical power to the machine and follow lockout / tagout procedures. Removable Components Procedure Remove the Control Panel. Remove the component being replaced.

  • Page 9: Component Panel Components

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Fig. 7 Fig. 8 COMPONENT PANEL COMPONENTS Disconnect the electrical power to the machine and follow lockout / tagout procedures. Removable Components Procedure Remove the Right Side Panel.

  • Page 10: Temperature Probe (Vc4Gd/6Gd)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Fig. 10 Fig. 9 TEMPERATURE PROBE (VC4GD/ 6GD) Disconnect the electrical power to the machine and follow lockout / tagout procedures. Remove the Right Side Panel.

  • Page 11: Gas Burner

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Fig. 11 Remove probe by pushing it through the oven wall and into the control panel area. Fig. 13 Remove the bolts securing the gas manifold to the oven and place the manifold to the side.

  • Page 12: Gas Orifice

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Reverse procedure to install the replacement burner. NOTE: Ensure that burner positioning bracket (U shaped end) is inserted into slot at the rear of the burner chamber.
  • Page 13 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS CURRENT PRODUCTION SHOWN (After February 2015) FIRST GENERATION UNIT SHOWN (Before April 2005) Loosen the bolts securing the valve and bracket assembly then remove the screws securing the valve to the bracket.

  • Page 14: Ignition Control Module

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Verify gas pressure as outlined under GAS PRESSURE ADJUSTMENT (for units before February 2015) and GAS VALVE PRESSURE CHECK (for units after February 2015) and check for proper operation.

  • Page 15: Spark Igniter And Flame Sense

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS NOTE: Check to ensure the spark gap distance is approximately 1/8". If the gap appears to be excessive or poor sparking is occurring then adjust. PREVOUS PRODUCTION SHOWN Fig.
  • Page 16 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Fig. 33 Fig. 31 Remove the nuts that secure the motor mounting Remove screws securing baffle panel and plate to the rear wall. remove the panel.

  • Page 17: Oven Doors (Simultaneous Doors)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 12. Reconnect lead wires at the motor, replace OVEN DOORS (SIMULTANEOUS conduit and junction box cover. DOORS) NOTE: Check data plate on motor for wiring schematic. The motor must rotate clockwise when viewed from the shaft end.

  • Page 18: Disassembly

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS NOTE: The door assembly is heavy and will drop OVEN DOORS AND BEARINGS down once the last screw is removed. If removing door (INDEPENDENT DOORS) assembly with-out assistance, use caution.

  • Page 19: Door Catch Ball Assembly (Independent Doors)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Adjust the ball catch as outlined under DOOR CATCH BALL ADJUSTMENT (INDEPENDENT DOORS). ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) NOTE: For units with serial number starting with 48 made after 8/12/07 and serial number starting with 54 made after 8/26/07.

  • Page 20: Door Switch

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Fig. 45 Independent doors: Remove the door handle then remove the outer door panel. Lift out the inner door panel and window assembly. NOTE: Left door only - remove door seal from the inside edge of the door.

  • Page 21: Mechanical Kx Thermostat (Vc4Gs/6Gs)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS HIGH LIMIT THERMOSTAT Disconnect the electrical power to the machine and follow lockout / tagout procedures. Take out racks from the oven. Remove the high limit thermostat cover/mounting plate from inside the oven cavity at the top.

  • Page 22: Interior Lights

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS Depress the retaining tabs and pull the socket out INTERIOR LIGHTS from the oven, far enough to disconnect the lead wires. Remove the socket from the oven.
  • Page 23 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS NOTE: The fan must be installed so air is pulled from the rear of the oven and blown into the control area. The arrow on the fan body indicates “air flow” direction and should be pointing toward the controls.

  • Page 24: Service Procedures And Adjustments

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS Certain procedures in this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures.

  • Page 25: Mechanical Thermostat Calibration (Vc4Gs/6Gs)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS If the average temperature Calculate the average temperature by adding the still differs more than 10°F temperature indicated when the lamp goes out to from the dial setting, adjust...

  • Page 26: Solid State Temperature Control Test (Vc4Gd/6Gd)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Calculate the differential by subtracting the temperature indicated when heat lamp goes out from temperature indicated when heat lamp comes on. Differential = Heat lamp OFF - Heat lamp ON Example: 360°...

  • Page 27: Temperature Probe Test (Vc4Gd/6Gd)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS NOTE: If oven is equipped with "Cook and Hold" If input voltage to the internal relay is option, set to Cook (normal cooking) before correct, proceed to step 8. If input continuing.

  • Page 28: Gas Pressure Adjustment (Units Up To February 2015)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS type. As temperature increases the resistance value decreases. Remove the Right Side Panel. NOTE: If right side panel is not accessible, this component can be serviced by removing the Control Panel.

  • Page 29: Gas Valve Pressure Check (Units After February 2015)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Turn the set screw to obtain the proper gas pressure (clockwise = pressure increase; counterclockwise = pressure decrease). NOTE: Accurate gas pressure adjustments can only be made with the gas on and the burner lit.

  • Page 30: Verification Of Spark At Ignitor

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Install hose barb adapter and attach manometer tube. Turn gas supply to the oven back on. Plug the unit in and turn the power switch ON. Set the temperature control to its highest setting and allow burner to ignite.

  • Page 31: Door Switch Adjustment

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS DO NOT HOLD THE WIRE WITH YOUR HANDS FOR THIS TEST. THE MANUAL GAS VALVE MUST BE CLOSED. Clamp the ignition cable in a manner that will position the end of the cable 3/16"...

  • Page 32: Door Adjustment

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Fig. 65 Reverse the procedure to install. DOOR ADJUSTMENT Disconnect the electrical power to the machine and follow lockout / tagout procedures. Check the doors to make sure they have an equal gap between them and that the vertical edge of the door is parallel to the vertical door seal.

  • Page 33: Door Strike Adjustment (Independent Doors)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Move the door until proper alignment is achieved Each oven door should open with a force of 8 to then tighten the screws on the upper door 25 pounds when pulled at the handle.

  • Page 34: Door Chain Adjustment (Simultaneous Doors)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Apply lubricant at the top of the door catch Turn set screw inside the catch assembly to lubricate the internal spring. See assembly housing clockwise to LUBRICATION.

  • Page 35: Computer Control (Vc4Gc/Vc6Gc)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS When the doors are opened, the COMPUTER CONTROL (VC4GC/ turnbuckles will move away from each other. VC6GC) The stop cable must be positioned where it moves freely and does not get pinched.

  • Page 36: Probe Test

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Press the set key then temperature key to enter ALTERNATING ON DISPLAY MENU the temperature set mode. PARAMETER DATA The display will alternate between the term Range High 1 "StPt"...
  • Page 37 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Adjust the calibration offset value as outlined in step 6, until the cycling temperature is within tolerance. If the above adjustment cannot be obtained, replace the computer control and check for proper operation.

  • Page 38: Electrical Operation

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Power Switch (S1) ..Determines the mode of operation; ON, OFF, or COOL DOWN. Oven Light Switch Controls the oven cavity lights.

  • Page 39: Component Location

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION SSR1 & SSR2 (VC4GC/ When SSR1 is energized by computer control, connects power to blower motor for Hi fan 6GC) ....
  • Page 40 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION VC4GS/6GS - Plug, Socket and Components (Standard Controls) F24682 Rev. D (1016) Page 40 of 75...
  • Page 41 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION VC4GD/6GD - Plug, Socket and Components (Standard Controls) Page 41 of 75 F24682 Rev. D (1016)
  • Page 42 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION VC4GS/6GS, VC4GD/6GD - Plug, Socket and Components (Roast & Hold Option) F24682 Rev. D (1016) Page 42 of 75...
  • Page 43 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION VC4GC/6GC - Plug, Socket and Components (Roast & Hold Standard) Page 43 of 75 F24682 Rev. D (1016)

  • Page 44: Sequence Of Operation

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Power to motor speed (Hi/Low) relay (R1) SEQUENCE OF OPERATION normally open (N.O.) contacts and hold relay (R2) common (C). VC4GS, VC6GS With Roast & Hold Option Component cooling fan energized.
  • Page 45 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Power is connected through The oven will continue to cycle on the thermostat the function switch (S3) until the doors are opened or the power switch contacts and the convection...
  • Page 46 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Control thermostat in the OFF position With door switch closed, power is (OPEN). connected through a second set of contacts on the power switch (S1), High limit switch CLOSED.
  • Page 47 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION If a flame is not NOTE: To Roast then Hold the cooked product at a "sensed" after 7 fixed temperature, the Roast & Hold timer must be seconds of sparking, used and the function switch (S3) must also be set to the "no ignition"...

  • Page 48: Vc4Gd, Vc6Gd With Roast & Hold Option

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Heat relay (R3) contacts (N.O.) The oven will continue to cycle on the hold close and the heating circuit is thermostat until the "Cook & Hold timer is turned powered.
  • Page 49 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Power switch (S1) turned ON. Power is also connected back through a second set of contacts on the power Component cooling fan energized. switch (S1) to terminal 8 on the Power ON light (Amber) comes ON.
  • Page 50 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Heat light goes out. Oven properly grounded. Power removed from heat relay (R3). Gas supply valve ON. R3 normally open (N.O.) contacts Gas combination control valve ON. OPEN. Power switch (S1) OFF.
  • Page 51 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION NOTE: Gas does not flow to the burner until the 2nd No ignition light (red) comes valve (main) is energized. ON, module performs a self diagnostic test for 4 seconds,...
  • Page 52 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION occurs: ROAST & HOLD timer is turned OFF; function Oven temperature falls below 160°F (±12) and switch (S3) is turned back to Normal ROAST (normal hold thermostat contacts close.
  • Page 53 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION Power removed from heat relay (R3) and Power is connected through the contacts open (N.O.). motor speed (Hi/Low) relay normally open (N.O.) contacts, Ignition control module de-energized. through function switch (S3) to Power removed from 2nd valve Convection fan motor.

  • Page 54: Vc4Gc, Vc6Gc (Roast & Hold Standard On Computer Model)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION VC4GC, VC6GC (Roast & Hold Standard on Power to terminal 1 on solid state relay 1 Computer Model) (SSR1 -load side) and solid state relay 2 Schematic diagram 10437 will be used to explain the (SSR2 -load side).
  • Page 55 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION With the 120VAC output from the Oven "Heat Light" on the control goes out. control activated and the centrifugal Oven "Ready Light" on the control comes switch on the convection fan motor closed, power is applied to the heat relay coil (R1).

  • Page 56: Cool Down Cycle (Computer Control Model)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - ELECTRICAL OPERATION After the oven temperature drops below 150°F, the heat comes back ON and cycles as needed, to maintain the "Hold" temperature of 150°F. Convection fan motor energized. The oven continues to cycle in this manner until one of the following occurs: The ROAST &...

  • Page 57: Schematics

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SCHEMATICS SCHEMATICS VC4GS, VC6GS Mechanical (KX) Controls Page 57 of 75 F24682 Rev. D (1016)

  • Page 58: Vc4Gs, Vc6Gs Mechanical (Kx) Controls, Roast & Hold Option

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SCHEMATICS VC4GS, VC6GS Mechanical (KX) Controls, Roast & Hold Option F24682 Rev. D (1016) Page 58 of 75...

  • Page 59: Vc4Gd, Vc6Gd Solid State Temperature Control

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SCHEMATICS VC4GD, VC6GD Solid State Temperature Control Page 59 of 75 F24682 Rev. D (1016)

  • Page 60: Vc4Gd, Vc6Gd Solid State Temperature Control, Roast & Hold Option

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SCHEMATICS VC4GD, VC6GD Solid State Temperature Control, Roast & Hold Option F24682 Rev. D (1016) Page 60 of 75...

  • Page 61: Vc4Gc, Vc6Gc Computer Control (Roast & Hold Standard)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SCHEMATICS VC4GC, VC6GC Computer Control (Roast & Hold Standard) Page 61 of 75 F24682 Rev. D (1016)

  • Page 62: Wiring Diagrams

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS WIRING DIAGRAMS VC4GS, VC6GS Mechanical (KX) Controls Fig. 84 F24682 Rev. D (1016) Page 62 of 75...
  • Page 63 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS Fig. 85 Page 63 of 75 F24682 Rev. D (1016)

  • Page 64: Vc4Gs, Vc6Gs Mechanical (Kx) Controls, Roast & Hold Option

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS VC4GS, VC6GS Mechanical (KX) Controls, Roast & Hold Option Fig. 86 F24682 Rev. D (1016) Page 64 of 75...
  • Page 65 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS Fig. 87 Page 65 of 75 F24682 Rev. D (1016)

  • Page 66: Vc4Gd, Vc6Gd Solid State Temperature Control

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS VC4GD, VC6GD Solid State Temperature Control Fig. 88 F24682 Rev. D (1016) Page 66 of 75...
  • Page 67 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS Fig. 89 Page 67 of 75 F24682 Rev. D (1016)

  • Page 68: Vc4Gd, Vc6Gd Solid State Temperature Control, Roast & Hold Option

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS VC4GD, VC6GD Solid State Temperature Control, Roast & Hold Option Fig. 90 F24682 Rev. D (1016) Page 68 of 75...
  • Page 69 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS Fig. 91 Page 69 of 75 F24682 Rev. D (1016)

  • Page 70: Vc4Gc, Vc6Gc Computer Control (Roast & Hold Standard)

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS VC4GC, VC6GC Computer Control (Roast & Hold Standard) Fig. 92 F24682 Rev. D (1016) Page 70 of 75...
  • Page 71 VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - WIRING DIAGRAMS Fig. 93 Page 71 of 75 F24682 Rev. D (1016)

  • Page 72: Troubleshooting

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING TROUBLESHOOTING Certain procedures in this section require electrical test or measurements while power is applied to the machine. Exercise extreme caution at all times and follow Arc Flash procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout procedures, attach test equipment and reapply power to test.

  • Page 73: Computer Control Models Only

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES Temperature probe malfunction on models HGC5/5X. (Thermostat malfunction on models DGC5) Excessive or low heat. Temperature control board malfunction. Gas pressure Insufficient. Gas orifice plugged or obstructed.

  • Page 74: Error Codes

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING SYMPTOM POSSIBLE CAUSES Probe malfunction. Control range high (rH1) setting to low. SETUP Oven not hot enough. MODE under COMPUTER CONTROL (VC4GD, VC6GD). Control malfunction. Error Codes In the display window, the error code will alternate between the code and the oven cavity temperature or dashes if the oven is calling for heat (heat light on).

  • Page 75: Vulcan

    VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - TROUBLESHOOTING CODE & PROBLEM PROBABLE CAUSE SOLUTION • Check the InP1 setup parameter. Verify it matches your sensor. Er11 - Open sensor error Open sensor • Check sensor and connections for a reversed or open sensor. If the condition causing the error is resolved, the error will clear.

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