Oven User Manual

ManualsBrandsVulcan Materials ManualsOvenGAS CONVECTION VC4GS

A product of VULCAN-HART LOUISVILLE, KY 40201-0696

F24682 (Rev. B, October 2007)

VC4GD WITH ROAST & HOLD SHOWN

SERVICE MANUAL

VC4G & VC6G SERIES

FULL SIZE

GAS CONVECTION OVENS

MODEL ML

VC4GS 126610

VC4GD 126611

VC4GC 136494

VC6GS 126612

VC6GD 126613

VC6GC 136495

- NOTICE -

This Manual is prepared for the use of trained Vulcan Service

Technicians and should not be used by those not properly qualified. If

you have attended a Vulcan Service School for this product, you may be

qualified to perform all the procedures described in this manual.

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.

Reproduction or other use of this Manual, without the express written

consent of Vulcan, is prohibited.

For additional information on Vulcan-Hart Company or to locate an authorized parts

and service provider in your area, visit our website at www.vulcanhart.com.

Summary of content (68 pages)

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SERVICE MANUAL VC4G & VC6G SERIES FULL SIZE GAS CONVECTION OVENS MODEL VC4GS VC4GD VC4GC VC6GS VC6GD VC6GC ML 126610 126611 136494 126612 126613 136495 VC4GD WITH ROAST & HOLD SHOWN - NOTICE This Manual is prepared for the use of trained Vulcan Service Technicians and should not be used by those not properly qualified. If you have attended a Vulcan Service School for this product, you may be qualified to perform all the procedures described in this manual.
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FULL SIZE GAS CONVECTION OVENS TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FULL SIZE GAS CONVECTION OVENS Computer Control (VC4GC/VC6GC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Computer Control Calibration (VC4GC/VC6GC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ELECTRICAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Component Function . . . . . . . . . . . .
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FULL SIZE GAS CONVECTION OVEN - 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. Models FEATURES MODEL VC4GS CAVITY TEMPERATURE DEPTH CONTROL 26.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS Top Front Cover 1. The top front cover is secured with four (4) screws, two on each side of cover. Remove these screws then remove the cover from the oven. NOTE: If the oven has a mechanical (KX type) thermostat, it must be removed from the control panel first, before removing the control panel. 2. Disconnect the temperature probe leads from the solid state temperature control. 3.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS CONTROL PANEL COMPONENTS Removable Components Procedure 1. Remove the control panel as outlined under COVERS AND PANELS. 2. Remove the component being replaced. 3. Reverse the procedure to install the replacement component, then check oven for proper operation. F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS COMPONENT PANEL COMPONENTS Removable Components Procedure 1. Remove the right side panel as outlined under COVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS. 2. Disconnect the wire leads to the component being replaced. 3. Remove the component. 4.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 7. TEMPERATURE PROBE (VC4GD/6GD) Adjust the temperature control as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION (VC4GD/6GD) in SERVICE PROCEDURES AND ADJUSTMENTS. GAS BURNER 1. Remove the right side panel as outlined under COVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS. the unit. 2.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 4. 6. Reverse procedure to install the replacement burner. GAS SOLENOID VALVE NOTE: Ensure that burner positioning bracket (U shaped end) is inserted into slot at the rear of the burner chamber. 7. Reverse procedure to install and check for proper operation. Check for proper operation. GAS ORIFICE Shut off the gas before servicing the unit. All gas joints disturbed during servicing must be checked for leaks.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 4. 5. Loosen the bolts securing the valve and bracket assembly then remove the screws securing the valve to the bracket. 3. Disconnect the lead wires and igniter cable from the ignition module board. 4. Remove the ignition module board from the mounting bracket. 5. Reverse the procedure to install the replacement ignition module board. Reverse the procedure to install the replacement gas valve.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 3. Reverse the procedure to install the assembly and check for proper operation. 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. 3. Remove screws securing baffle panel and remove the panel. 4. If replacing: BLOWER AND MOTOR Shut off the gas before servicing the unit. 1. Take out the racks and rack supports. 2.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS NOTE: Check data plate on motor for wiring schematic. The motor must rotate clockwise when viewed from the shaft end. 6. Remove the nuts that secure the motor mounting plate to the rear wall. 12. Slide blower onto motor shaft until hub is flush with end of shaft then tighten set screws. 13. Adjust motor position until blower is parallel to motor mounting plate as outlined under BLOWER ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS. 14.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 2. 8. Remove the door switch lever. Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT and DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS. OVEN DOORS (SIMULTANEOUS DOORS) Assembly Removal 3. Remove the lower door seal strip to expose the mounting screws of the door assembly. 4.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS NOTE: The door assembly is heavy and will drop down once the last screw is removed. If removing door assembly with-out assistance, the ignition cable, flame sense lead and gas manifold should also be removed to avoid damage to these components. 5. Lift up on the door assembly and swing the right side out then move the assembly to the left to clear the slots in the upper door sill. 6.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS DOOR CATCH BALL ASSEMBLY (INDEPENDENT DOORS) DOOR WINDOW NOTE: For units with serial number starting with 48 made before 8/13/07 and serial number starting with 54 made before 8/27/07. 1. Remove the top front cover as outlined under COVERS AND PANELS. 2. Remove the screws that secure the door catch assembly. 1. Remove the screws at the top and bottom of door. 2. Independent doors: A.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS MECHANICAL KX THERMOSTAT (VC4GS/6GS) 1. Remove the racks and right rack support. 2. Remove the thermostat knob and mounting screws from the control panel and then remove the control panel. 3. Remove the probe guard from the oven cavity wall. NOTE: When installing, the probe should not extend beyond the probe guard. 5. 4. Reverse procedure to install the replacement window.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS 3. Replace bulb then reverse the procedure to install. Lamp Assembly 3. Disconnect lead wires from high limit thermostat then remove high limit thermostat from cover/mounting plate. NOTE: Remove the old RTV from the cover and mating surfaces inside the oven cavity and apply new RTV before installing. 4. 1. Remove the lens and bulb. 2. Remove the springs from the retaining tabs (2 places) on the socket. 3.
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FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS COOLING FAN 1. Remove the right side panel as outlined under COVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS. 2. Disconnect the lead wires to the fan motor by removing wire nuts. 3. Remove the screws securing the air deflector to the fan then loosen the tab screw holding the fan to the component panel.
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FULL SIZE GAS 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. If test points are not easily accessible, disconnect power and follow lockout / tagout procedures, attach test equipment and reapply power to test. SOLID STATE TEMPERATURE CONTROL CALIBRATION (VC4GD/6GD) 1.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS MECHANICAL THERMOSTAT CALIBRATION (VC4GS/6GS) NOTE: Allow the oven to cycle at least two times between adjustments before performing the calculation. 1. Place a thermocouple in the geometric center of the oven cavity. 9. 2. Set the ON-OFF-COOL DOWN switch to ON. 3. Set the thermostat dial to 350°F. 4. Allow the oven temperature to stabilize (normally 3 cycles). 5.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS 4. 5. Check machine data plate for correct voltage to oven. Refer to diagram below for proper terminal locations and voltages before checking the control. Use the correct terminals for the corresponding voltage. A. If correct, temperature control is functioning properly. B. If incorrect, check temperature probe as outlined under TEMPERATURE PROBE TEST (VC4GD/6GD). Turn the ON-OFF-COOL DOWN switch to ON.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS 5. Reverse procedure to install. TEMP (°F) OHMS* TEMP (°F) OHMS* 77 90000 360 822 240 4077 380 656 260 3016 400 529 280 2266 425 424 300 1726 450 334 320 1332 475 266 340 1041 3. Install hose barb adapter and attach manometer tube. 4. Remove adjustment screw cap from the gas valve and turn gas supply to the oven back on. 5. Plug the unit in and turn the power switch ON. 6.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS VERIFICATION OF SPARK AT IGNITOR 4. Plug the oven in and set the temperature control to the maximum setting. 5. Turn the power switch ON. 6. Sparking should occur after a 4 second delay, for a duration of 7 seconds then repeat twice after a 15 second purge time. Arching from the ignition cable to the oven frame should be observed. DOOR SWITCH ADJUSTMENT Shut off the gas before servicing the unit. 1.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS BLOWER ADJUSTMENT Shut off the gas before servicing the unit. 1. Remove the blower motor and mounting assembly by following steps 1 through 7 as outlined under BLOWER AND MOTOR in REMOVAL AND REPLACEMENT OF PARTS. 2. Loosen the motor mounting bolts. 3. Adjust the motor position until the blower is parallel to and 1/4 inch away from the motor mounting plate.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS DOOR ADJUSTMENT 4. Move the door until proper alignment is achieved then tighten the screws on the upper door bearing hardware. 5. Repeat step 3 and 4 on the opposite door, if necessary. DOOR STRIKE ADJUSTMENT (INDEPENDENT DOORS) 1. 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.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS 4. Each oven door should open with a force of 8 to 25 pounds when pulled at the handle. The adjustments must allow the doors to remain closed during normal operation and allow opening without exertion by the user. NOTE: Shims may be required under the door strike, before the proper door tension adjustment can be set. 4. Apply lubricant at the top of the door catch assembly to lubricate the internal spring. See LUBRICATION under GENERAL.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS A. Adjust catch ball tension as follows: 1) 2) Turn set screw inside the catch assembly housing clockwise to increase tension on catch ball and counterclockwise to decrease tension on catch ball. D. Chain must be tight enough that the doors move simultaneously when opened or closed. E. When the doors are opened, the turnbuckles will move away from each other. F.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS B. 7. If doors operate properly, continue with procedure. MENU Install the lower front cover. COMPUTER CONTROL (VC4GC/VC6GC) ALTERNATING ON DISPLAY PARAMETER DATA C_F F gb 4000 Celsius_Fahrenheit Guard Band Operation Temperature Compensation tcnP OFF Refer to the Instructions Manual for specific operating instructions.
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FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS 5. Re-assemble oven and check for proper operation. COMPUTER CONTROL CALIBRATION (VC4GC/VC6GC) 1. Place a thermocouple in the geometric center of the oven cavity. 2. Set the ON-OFF-COOL DOWN switch to ON. 3. A. If the set point temperature is 350°F, proceed to step 4. B. If the set point temperature is other than 350°F, proceed to step 3 to change the temperature.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Power Switch (S1) . . . . . . . . . . . . . Determines the mode of operation; ON, OFF, or COOL DOWN. Oven Light Switch (S2) . . . . . . . . . Controls the oven cavity lights. Fan Speed Switch Hi/Low (S3) . . . Controls blower motor speed between Hi and Low settings. Available on standard models VC4GS/6GS or VC4GD/6GD. On models with the ROAST & HOLD option (S3) becomes the Function Switch. Function Switch (S3) . .
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Computer Control (VC4GC/6GC) . . . . . . . . . . . . . . . . . Monitors temperature sensor and regulates the oven cavity temperature by controlling the heat relay (R1) through the blower motor centrifugal switch contacts. Also, counts the ROAST time (normal cooking) of the product and signals the electronic alarm at the end of the cycle.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION COMPONENT LOCATION F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GS/6GS - Plug, Socket and Components (Standard Controls) Page 33 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GD/6GD - Plug, Socket and Components (Standard Controls) F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GS/6GS, VC4GD/6GD - Plug, Socket and Components (Roast & Hold Option) Page 35 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GC/6GC - Plug, Socket and Components (Roast & Hold Standard) F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION SEQUENCE OF OPERATION VC4GS, VC6GS With Roast & Hold Option (Mechanical KX Thermostat) Schematic diagram 5304 will be used to explain the electrical sequence of operation for both the Normal ROAST cycle (normal cooking) and the ROAST & HOLD cycle. Normal Roast Cycle 1. Conditions. A. Oven connected to correct voltage. 1) L1 (HOT) to power switch (S1).
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION b. When the convection fan motor reaches operating speed, the centrifugal switch on the motor closes. The heat relay (R3) is then energized, R3 relay contacts normally open (N.O.) close and the heating circuit is powered. Timer Cycle (Normal Roast Cooking) 1. With the power switch turned ON, power is supplied to timer. a) Ignition control module is energized. 2. Set ROAST timer to desired time (normal cooking).
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION J. Roast timer (normal cooking) in the OFF position. K. Roast and Hold timer in the OFF position. L. Oven doors Closed. Power is also connected through the another set of relay R4 normally closed (N.C.) contacts to the other side of motor speed relay (R1). 1) a. M. 2. a. 3) Door switch contacts CLOSED. Oven cavity temperature below 140°F. Set controlling thermostat to desired ROAST then Hold temperature (Roast & Hold cooking). 3.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION 1) R3 normally open (N.O.) contacts open. a. NOTE: When temperature is above 160°F (±12) the hold thermostat contacts are open. Ignition control module deenergized. a) 3) nd Power removed from 2 valve (main) on the gas valve and gas flow to the burner stops. NOTE: This is considered first stage cooking in the ROAST AND HOLD cycle. 5.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION If a flame is not SENSED after 7 seconds of sparking, the NO IGNITION light comes back on, 2nd valve (main) on the gas valve is de-energized and gas flow to the burner stops. Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out. To reset after a lockout, turn power switch (S1) OFF then ON. 5. Oven reaches the fixed HOLD temperature and the hold thermostat opens. A. Heat light goes out. B.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION 1) Transformer (T1) energized. a. Power (24VAC) to one side of the following components: heat relay (R3) normally open (N.O.) contacts, high limit --- connected through the normally closed (N.C.) contacts to the 1st valve (safety) on the dual solenoid gas valve. a) 1st valve (safety) on the gas valve energized. b) Power is connected through the centrifugal switch contacts on the convection fan motor, heat relay (R3) is energized, (R3) contacts (N.O.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Timer Cycle (Normal Roast Cooking) I. High limit switch CLOSED. NOTE: The ROAST timer (normal cooking) operates independently of the heating cycle. Additional time can be set or the timer can be turned OFF throughout the cooking cycle. J. Roast timer (normal cooking) in the OFF position. K. Roast and Hold timer in the OFF position. L. Oven doors Closed. 1. 2. With the power switch turned ON, power is supplied to timer. 1) A.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION a) If a flame is not SENSED after 7 seconds of sparking, the NO IGNITION light comes back on, 2nd valve (main) on the gas valve is de-energized and gas flow to the burner stops. Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out. To reset after a lockout, turn power switch (S1) OFF then ON.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION A. 3. D. Contacts 1 & 3 close, timer motor is energized and timing DOWN begins. Time expires on Roast & Hold timer. A. B. When the convection fan motor reaches operating speed, the centrifugal switch on the motor closes. 1) Contacts 1 & 3 open, timer motor is deenergized and timing stops. Heat relay (R3) is energized. a. Contacts 1 & 4 close.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION 6. b) The oven will continue to cycle on the hold thermostat until the ROAST & HOLD timer is turned to the OFF position and the function switch (S3) is change back to ROAST (normal cooking) or the power switch (S1) is turned to the OFF or COOL DOWN position. Cool Down Cycle (Solid State Temperature Control) NOTE: The electrical sequence of operation for the COOL DOWN cycle is written for ovens with the ROAST & HOLD option. 1. Conditions. A.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION a. Roast Cycle (Normal Cooking) 1. Conditions. A. B. Oven connected to correct voltage. 1) L1 (HOT) to power switch (S1). 2) L2 (NEUTRAL or SECOND LINE) to one side of the following components: oven cavity lights, convection fan motor common (C), transformer primary (T1), component cooling fan and the heat relay coil (R1). 2) NOTE: Gas does not flow to the burner until the 2nd valve (main) is energized.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION c. Ignition control module is energized. a) Temperature and Time Cycle (Cooking) No ignition light (red) comes ON, module performs a self diagnostic test for 4 seconds, 2nd valve (main) on the gas valve is energized. Gas starts to flow to the burner, sparking begins, the NO IGNITION light goes out and burner lights. Sparking continues for up to 7 seconds or until a flame is established.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Cool Down Cycle (Computer Control Model) 1. Conditions. A. Oven is ON. B. Oven cavity temperature needs to be lowered. C. Doors are open. 1) D. 2. Door switch contacts OPEN. Power switch (S1) set to either ON or OFF. Power Switch (S1) turned to COOL DOWN. NOTE: With door switch contacts OPEN (doors open), the convection fan motor will still run and continue to cool the oven. A.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION SCHEMATICS VC4GS, VC6GS Mechanical (KX) Controls F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GS, VC6GS Mechanical (KX) Controls, Roast & Hold Option Page 51 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GD, VC6GD Solid State Temperature Control F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GD, VC6GD Solid State Temperature Control, Roast & Hold Option Page 53 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GC, VC6GC Computer Control (Roast & Hold Standard) F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION -NOTES- Page 55 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION WIRING DIAGRAMS VC4GS, VC6GS Mechanical (KX) Controls F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Page 57 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GS, VC6GS Mechanical (KX) Controls, Roast & Hold Option F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Page 59 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GD, VC6GD Solid State Temperature Control F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Page 61 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GD, VC6GD Solid State Temperature Control, Roast & Hold Option F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Page 63 of 68 F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION VC4GC, VC6GC Computer Control (Roast & Hold Standard) F24682 (Rev.
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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION Page 65 of 68 F24682 (Rev.
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FULL SIZE GAS 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. If test points are not easily accessible, disconnect power and follow lockout / tagout procedures, attach test equipment and reapply power to test. ALL MODELS SYMPTOMS POSSIBLE CAUSES Blower motor doesn’t run with 1S in COOL DOWN or ON position. 1. 2. 3. 4. 5. Line voltage.
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FULL SIZE GAS CONVECTION OVENS - TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES Normal (Roast) mode OK, no Hold mode. (Roast & Hold models only). 1. 2. 3. 4. Roast and Hold switch (S3) malfunction. R2 hold relay malfunction. Roast & Hold timer malfunction. Interconnecting wiring malfunction. Component cooling Fan does not run. 1. 2. Motor inoperable. Interconnecting wiring malfunction. Uneven Cooking. 1. 2. 3. Convection Fan motor speed/direction. Poor combustion. A. Gas pressure incorrect. B.
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FULL SIZE GAS CONVECTION OVENS - CONDENSED SPARE PARTS LIST CODE & PROBLEM PROBABLE CAUSE SOLUTION Er06 - Zone 1 A/D underflow error • Incorrect sensor type • Measuring temperature outside the sensor range • Check the InP1 setup parameter. Verify it matches your sensor. • Check sensor and connections for a reversed or open sensor. If the condition causing the error is resolved, the error will clear. Er07 - Zone 1 A/D overflow error Open sensor • Check the InP1 setup parameter.