VC4ED - Oven Vulcan - Free user manual and instructions

Product Type	Full Size Electric Convection Oven
Model	VC4ED
Brand	Vulcan
Cavity Depth	26.5 inches
Temperature Control Type	Solid State
Door Type	Simultaneous (50/50)
Cook Timer	1-Hour Dial
Total Power (1 Phase 60 Hz)	12.5 kW
Voltage Options	208V or 240V (1 or 3 phase)
Amperage per Line (1 Phase 240V)	60 A
Recommended Circuit Protection (1 Phase 240V)	80 A
Interior Lights	Rear mounted, round; or side mounted, square; 120V 40W each
Cooling Fan	230V, draws air from outside to cool control area
High Limit Thermostat	Opens at 550°F, auto resets at 500°F
Blower Motor	1/3 HP, 2-speed, sealed bearings, no lubrication needed
Heating Elements	6 elements (2.0 kW each at 208/240V)
Door Switch	Stops oven operation when doors are opened
Oven Light Switch	Toggle switch, controls cavity lights
Power Switch	ON/OFF/COOL DOWN positions
Component Cooling Fan	230V, runs whenever oven is on
Lubrication	Huskey's TF1000 grease or equivalent for door catch roller
Tools Required	Standard hand tools, VOM, temperature tester, gear puller, spring force gauge

Frequently Asked Questions - VC4ED Vulcan

What should I do if the blower motor doesn't run with the power switch in ON or COOL DOWN position?

Check the line voltage, power switch (S1), fan speed switch (S3), interconnecting wiring, and motor. Refer to the TROUBLESHOOTING section for detailed checks.

How do I calibrate the solid state temperature control?

Place a thermocouple in the geometric center of the oven. Set the dial to 350°F and allow the oven to stabilize for 3 cycles. Record the temperatures when the heat lamp turns off and on. Calculate the average; if more than 10°F from the dial setting, adjust the potentiometer located at the 3 o'clock position on the control. See SOLID STATE TEMPERATURE CONTROL CALIBRATION.

What is the proper door gap and how do I adjust the doors?

The doors should have a 1/8 inch gap between them and be parallel to the vertical door seal. To adjust, remove the top front cover, loosen the upper door bracket screws, move the door to align, and tighten. Refer to DOOR ADJUSTMENT.

How do I replace a heating element?

Disconnect power, remove racks and top door seal. Remove the perforated panel on the side of the element. Remove hold-down clamps and mounting bracket screws. Disconnect lead wires and remove the element. Clean RTV residue, apply new high-temperature RTV, and reverse to install. See HEATING ELEMENTS.

What should I do if the oven is not heating but the convection fan runs?

Check the high limit thermostat (open?), heating elements, contactor, and temperature control. Use the troubleshooting guide for possible causes: high limit open, element failure, contactor malfunction, or control failure.

How do I test the temperature probe (solid state control)?

Remove the probe leads from the control. Use an ohmmeter and compare resistance values to the table in the manual (e.g., 90,000 ohms at 77°F, 822 ohms at 360°F). Tolerance is ±10%. If out of range, replace the probe. See TEMPERATURE PROBE TEST (SOLID STATE CONTROL).

What are the error codes on the computer control models and how do I resolve them?

Error codes like Er01 (ROM checksum), Er06 (A/D underflow), Er11 (open sensor) indicate specific issues. Cycle power first. For sensor errors, check the InP1 parameter and sensor connections. Refer to the error code table in the TROUBLESHOOTING section.

How do I adjust the door chain on simultaneous doors?

Remove the lower sill cover. Check turnbuckle spacing (5-5.5 inches apart). Loosen locknuts and adjust turnbuckles so the right door leads the left by about 1/4 inch when closing. Tighten locknuts. See DOOR CHAIN ADJUSTMENT (SIMULTANEOUS DOORS).

What is the recommended circuit protection for the VC4ED?

For 1 phase 208/240V, the recommended circuit protection is 80A. For 3 phase 208/240V, it is 45A (208V) or 40A (240V). Always comply with the National Electric Code. See the SPECIFICATIONS table.

How do I replace the interior light bulb?

Remove racks. For rear mounted round lights, unscrew the glass lens and bulb. Use a cloth to avoid fingerprints. Replace with a 120V 40W bulb. For side mounted square lights, pull off the lamp cover, grasp the bulb with a cloth, and remove. See INTERIOR LIGHTS.

USER MANUAL VC4ED Vulcan

Exterior view of a stainless steel electric biveng oven with black legs and doors (no visible text or symbols)

VC4E & VC6E Series Full Size Electric Convection Ovens

VC4ES ML-126743

VC4ED ML-126744

VC4EC ML-126745

VC6ES ML-126746

VC6ED ML-126747

VC6EC ML-126748

- NOTICE -

This Manual is prepared for the use of trained Hobart 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 Hobart 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 Hobart Service Technician.

The reproduction, transfer, sale or other use of this manual, without the express written consent of Hobart, 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.

TABLE OF CONTENTS

SERVICE UPDATES 4

SERVICE UPDATES - VC4E / VC6E 4

TIS DOCUMENT LIST - VC4E AND VC6E 4

GENERAL 6

INTRODUCTION 6

INSTALLATION, OPERATION AND CLEANING 6

OPERATION 6

CLEANING 6

LUBRICATION 6

TOOLS 6

SPECIFICATIONS 6

REMOVAL AND REPLACEMENT OF PARTS 8

COVERS AND PANELS 8

CONTROL PANEL COMPONENTS 9

COMPONENT PANEL COMPONENTS 9

TEMPERATURE PROBE (SOLID STATE CONTROL) 10

HEATING ELEMENTS ENDING AT SERIAL NUMBER 481916863 11

HEATING ELEMENTS 12

BLOWER AND MOTOR ENDING AT SERIAL NUMBER 481916863 14

BLOWER AND MOTOR 15

DOOR SWITCH 16

DOOR WINDOW 17

OVEN DOORS AND BEARINGS (INDEPENDENT DOORS) ENDING AT SERIAL NUMBER 481916782 17

OVEN DOORS (INDEPENDENT DOORS) STARTING AT SERIAL NUMBER 481916783 18

OVEN DOORS (SIMULTANEOUS DOORS) ENDING AT SERIAL NUMBER 481916783 19

OVEN DOORS (SIMULTANEOUS DOORS) 20

ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) 21

DOOR CATCH ROLLER ASSEMBLY (INDEPENDENT DOORS) 21

MECHANICAL (KX) THERMOSTAT 21

HIGH LIMIT THERMOSTAT 22

INTERIOR LIGHTS (REAR MOUNTED, ROUND) 22

INTERIOR LIGHTS (SIDE MOUNTED, SQUARE) 23

COOLING FAN 25

SERVICE PROCEDURES AND ADJUSTMENTS 26

SOLID STATE TEMPERATURE CONTROL CALIBRATION 26

MECHANICAL (KX) THERMOSTAT CALIBRATION 27

SOLID STATE TEMPERATURE CONTROL TEST 28

TEMPERATURE PROBE TEST (SOLID STATE CONTROL) 29

HEATING ELEMENT TEST 30

BLOWER ADJUSTMENT 31

DOOR ADJUSTMENT 31

DOOR STRIKE ADJUSTMENT (INDEPENDENT DOORS) 32

DOOR CATCH ROLLER ADJUSTMENT (INDEPENDENT DOORS) 33

DOOR SWITCH ADJUSTMENT 34

DOOR CHAIN ADJUSTMENT (SIMULATANEOUS DOORS) 34

COMPUTER CONTROL 35

COMPUTER CONTROL TEMPERATURE CALIBRATION 36

COMPUTER CONTROL OPERATIONAL TEST 37

SERVICE PROGRAMMING AND TESTING FOR 3700 COMPUTER CONTROL 39

SCHEMATICS AND WIRING DIAGRAMS 50

TROUBLESHOOTING 75

TROUBLESHOOTING 75

COMPUTER CONTROL MODELS ONLY 76

SERVICE UPDATES

SERVICE UPDATES - VC4E / VC6E

April 2024

- Updated SCHEMATICS AND WIRING DIAGRAMS.

June 2019

- Added SERVICE PROGRAMMING AND TESTING FOR 3700 COMPUTER CONTROL.

October 2018

• HEATING ELEMENTS

• BLOWER AND MOTOR
• INTERIOR LIGHTS (Rear Mounted, Round)
• INTERIOR LIGHTS (Side Mounted, Square)
• DOOR ADJUSTMENT
- OVEN DOORS (INDEPENDENT DOORS) Starting at Serial Number 481916783
- OVEN DOORS (SIMULTANEOUS DOORS)
- COMPONENT LOCATION
• SCHEMATICS AND WIRING DIAGRAMS

TIS DOCUMENT LIST - VC4E AND VC6E

SERVICE TAB
Document Title Document Type
VC4E and VC6E Service Manual Service Manual
NCC Temp Control with Harness Service Kit Instructions	(SKI)

SERVICE TAB (Multimedia)
Document Title Document Type
Did You Know - VC4ED Misc.
3700 Oven Quick Start Guide Operator
Repair Flood-Damaged Equipment Service Bulletin
VC3, VC4ED, and VC6ED & VC6EC Series Electric Convection Ovens I&O Manual
VC3, VC4, and VC6 Series Electric Convection Oven Operator Operator
Fundamentals of Gas Service Instructions
TSB 1037A Hobart to Vulcan "Common" Model Cross Reference List Technical Service Bulletin (TSB)
Convection Oven Computer Control Guide Operator
Rating Plate Locationson Current Vulcan-Hart/Wolf Range Equipment Technical Service Bulletin (TSB)
Convection Ovens Gas and Electric Service Instructions
SB770R Door Latch Change on Full Size Convection Ovens (VC4, VC6, SG, WKG, & WKE)	Technical Service Bulletin (TSB)
SB880 Independent Door Handle Assembly for Convection Ovens Technical Service Bulletin (TSB)
SB930 Convection Oven Door Switch Replacement for Wolf Challenger XL and the Vulcan Endurance Gas Ranges	Technical Service Bulletin (TSB)
TSB 0368 Fast Thermostatic Controlled Convection Ovens	Technical Service Bulletin (TSB)
TSB 0652C Digital Countdown Timer Change - Convection Ovens Technical Service Bulletin (TSB)
TSB 0872 Full Size Convection Oven-Door chain Adjustment Not Holding	Technical Service Bulletin (TSB)
TSB 0874 Full Size Convection Ovens - Lighting & Cooling Fan	Technical Service Bulletin (TSB)
TSB 0934 Gas Convection Ovens, Blower Motor & Wheel Change Technical Service Bulletin (TSB)
TSB 0934 Programmable Controls - 355452-2 (Rev. 4.0) Technical Service Bulletin (TSB)
All Half Size & Full Size Unites w/Independent Opening Doors -Enhanced Door Catch Info.	Technical Service Bulletin (TSB)
Watlow 734C Computer Control Technical Service Instructions (TSI)
Vulcan & Wolf Gas Convection Ovens with White Rodgers Gas Valve Technical Service Instructions (TSI)

PARTS TAB
Document Title Document Type
Part Catalog for VC4E and VC6E Parts Catalog

DIAGRAMS TAB
Document Title Document Type
HGC5, DGC5, VC4G, WKGD Series Wiring Diagram

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.

FEATURES
MODEL CAVITY	DEPTH	TEMPERATURECONTROL	DOORS (50/50) COOK	TIMER
WCED 26.5" Solid State Simultaneus		1-Hour Dial

INSTALLATION, OPERATION AND CLEANING

Refer to the installation instructions on single or stacked ovens.

OPERATION

Refer to the instructions manual for specific operating instructions.

CLEANING

Refer to the instructions manual for specific cleaning instructions.

LUBRICATION

• Cavity blower motor has sealed bearings and requires no additional lubrication.
• Huskey's TF1000 grease or equivalent high temperature non-stick grease.

TOOLS

Standard

• Standard set of hand tools
  • VOM with A.C. current tester (Any quality VOM with a sensitivity of at least 20,000 ohms per volt can be used)
• Gear Puller to remove blower
  • Temperature tester (thermocouple type)

Special

• Manometer
• Clamp on amp meter
• Spring force gauge, pull type with a minimum 30 pound full scale range (purchase locally)
• RTV sealant, 736 DOW silicone high temp (P/N 542133) or equivalent

SPECIFICATIONS

AMPERAGE - 3 PHASE/ 60HZ
MODEL	TOTAL POWER (KW)	PER LINE1		RECOMMENDED CIRCUIT PROTECTION2
		208V 240V 2	08V 240V
WC4ED 26	5 35 33 45 40
NOTES:	1Amperage values in the table are nominal. Tolerance is +5/-10%.2Complied in accordance with National Electric Code, ANSI/NFPA 70, latest edition
AMPERAGE - 1 PHASE/ 60HZ
MODEL	TOTAL POWER (KW)	PER LINE1		RECOMMENDED CIRCUIT PROTECTION2
WC4ED 12	5 60 52 80 70
NOTES:	1Amperage values in the table are nominal. Tolerance is +5/-10%.2Complied in accordance with National Electric Code, ANSI/NFPA 70, latest edition.

REMOVAL AND REPLACEMENT OF PARTS

COVERS AND PANELS

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

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.

Fig. 1

1. Reverse the procedure to install.

Bottom Front Cover

1. The bottom front cover is secured with four (4) screws, two on each side of cover. Remove these screws then remove the cover from the oven.

Fig. 2

1. Reverse the procedure to install.

Control Panel

1. Remove three (3) screws on the right side which secure the control panel then pull the panel away from the oven.

Fig. 3

1. Disconnect the temperature probe leads from the solid state temperature control.
2. Unplug the wire harness connector to the control panel components.
3. Reverse the procedure to install.

Right Side Panel

1. Remove the two screws near front of oven, which secure the bottom front cover and control panel.
2. Remove the remaining seven screws securing the right side panel.

Fig. 4

1. Pull the right side panel out at the bottom then down to remove.
2. Reverse the procedure to install.

Left Side Panel

1. Remove the screws which secure the left side of the top front cover, bottom front cover and control panel.

2. Remove the seven screws securing the left side panel.

Fig. 5

1. Pull the left side panel out at the bottom then down to remove.
2. Reverse the procedure to install.

CONTROL PANEL COMPONENTS

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

Removable Components

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

PANEL WITH STANDARD CONTROLS SHOWN

36673
Fig. 6

COMPONENT PANEL COMPONENTS

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

Removable Components

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.

1. Disconnect the wire leads to the component being replaced.
2. Remove the component.
3. Reverse the procedure to install the replacement component and check oven for proper operation.

COMPONENT PANEL - STANDARD OVEN CONTROLS

Fig. 7

TEMPERATURE PROBE (SOLID STATE CONTROL)

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

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 COVER AND PANELS.

1. Disconnect the probe leads from the solid state temperature control.
2. Remove the racks and right rack support.
3. Remove the probe guard or mounting clips.

Mechanical component with a metallic handle and circular end, shown against a dark background (no visible text or symbols)

Fig. 8

1. Remove probe by pushing it through the oven wall and into the control panel area.

Black-and-white photo of a spacecraft with a long rod extending into space, showing a small human figure and a vehicle (no visible text or symbols)

Fig. 9

NOTE: The hole in the oven cavity wall does not line up straight with the oven cavity outer shell, therefore the probe must be removed at an angle.

1. Reverse the procedure to install the replacement probe.

NOTICE

The tip of the probe should be located near the center of the large cutout, as shown in (fig link). The end with the wire attached should be protected by the guard. It is possible to damage the probe/wire with force from a tray if probe is not protected properly.

Close-up of a metallic mechanical component with four slots and mounting holes, no visible text or symbols

Fig. 10

1. Adjust the temperature control as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION in SERVICE PROCEDURES AND ADJUSTMENTS.

HEATING ELEMENTS Ending at Serial Number 481916863

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

NOTE: Starting with production in October, 2001, the top cavity panel will have 3/4" square holes for easier element removal. Ovens manufactured prior to this date have 1/2" round holes that sometimes make it difficult to remove elements thru the cavity. A serial number cut off will not be available. Follow the procedures for element removal as outlined below.

Front Access

1. Remove the oven racks and rack supports.
2. Remove the "top" door seal from the oven.
3. Determine if the heating element to replace is on the left or right side in the oven cavity. The element locations from front to back are: Right side - R1, R2 & R3; Left side - R4, R5 & R6.

A. Measure the current draw of the heating elements as outlined under HEATING ELEMENT TEST in SERVICE PROCEDURES AND ADJUSTMENTS.

1. From inside the oven cavity, remove the perforated panel from the same side of the element being replaced.

Fig. 11

A. If removing the right side panel, also remove the probe guard or mounting clips.
B. Run the probe wire thru the panel opening before lifting panel out.

1. From the element being replaced, remove the hold down clamps, the mounting bracket screws at the top, then remove the element.

Fig. 12

NOTE: The mounting bracket is sealed with RTV which may still hold the element after the screws are removed. Also, in some cases, the ring terminal

connected to the element may interfere with easy removal. If access to the left side panel and/or the top panel is available, see ALTERNATE ACCESS.

1. Disconnect the lead wires from the element.

2. Clean RTV residue from the mating surface inside the oven, apply new high temperature RTV to the heating element mounting bracket and reverse procedure to install.

3. Check for proper operation.

Alternate Access

NOTE: If the heating element is not easy to remove from inside the oven cavity, and access to the left side panel and/or the top panel is available, this alternate removal method may be used.

NOTE: On stacked ovens, if the bottom oven is being serviced and the heating element to replace is on the right side, the ovens must be unstacked to access the heating element terminals through the top. Once unstacked, follow the removal procedure below.

1. Perform steps 1 thru 4 under FRONT ACCESS.

2. If the element is on the left side:

A. the insulation at the top to expose the element terminals.
B. Remove the lead wires from the element being replaced. Proceed to step 4.

1. If the element is on the right side:

A. Remove the top panel and pull back the insulation to expose the element terminals.
B. Remove the lead wires from the element being replaced.

1. clamps holding the element vertical, the screw's securing mounting bracket at the top, and then remove the element.

NOTE: The mounting bracket is sealed with RTV which may still hold the element after the screws are removed.

1. Clean RTV residue from the mating surface inside the oven, apply new high temperature RTV to the heating element mounting bracket and reverse procedure to install.

2. Check for proper operation.

HEATING ELEMENTS

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove racks.
2. Remove RIGHT SIDE PANEL(S).
3. Remove nuts (1, Fig. 13) from element wiring connections.

NOTICE

Use second wrench on nut (2, Fig. 13) behind terminal when removing or installing to prevent element stud from twisting and getting damaging.

Fig. 13

1. Remove top baffle.

Close-up of a mechanical component with internal fan-like structure and directional arrows (no text or symbols)

Fig. 14

1. Remove side baffle.

Close-up of a mechanical or electrical component with curved and straight lines, showing internal structure and mounting brackets (no visible text or symbols)

Fig. 15

1. Remove element support brackets.
   

Close-up of a metallic fan or vent with internal blades and mounting holes, mounted on a dark frame (no visible text or symbols)

Fig. 16
7. Loosen all element mounting plate hex head screws.

Close-up of a metallic structure with curved and straight lines, possibly a battery or electrical component, mounted on a metal frame (no visible text or symbols)

Fig. 17

1. Slide element mounting plate (1, Fig. 18) over to release from cavity wall and remove elements from oven.
   

Close-up of electrical wiring and components with no visible text or symbols

Fig. 18
9. Reverse procedure to install.
10. Verify operation.

BLOWER AND MOTOR Ending at Serial Number 481916863

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Take out the racks and rack supports.
2. Remove screws securing baffle panel and remove the panel.

Fig. 19

3. If replacing:

A. Blower Only - Loosen set screws on blower hub and using a bearing puller, remove blower from motor shaft.
1) Reverse procedure to install and adjust blower position as outlined under BLOWER ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS.
B. Motor - perform step 3A and continue procedure.

1. Remove the nuts that secure the motor mounting plate to the rear wall.

Fig. 20

1. Place a piece of cardboard on the bottom of the oven cavity to protect its surface from any damage during motor assembly removal.
2. Pull the motor assembly into the oven cavity and place it on the cardboard.
3. Remove the junction box cover from the motor, disconnect lead wires and remove the conduit.
4. Remove motor mounting bolts and flat washers then lift the motor from the mounting plate.
5. Position the replacement motor on the motor mounting plate and install mounting bolts and washers. Hand tighten mounting bolts only.

Fig. 21

1. Reconnect lead wires at the motor, replace conduit and junction box cover.

NOTE: Check data plate on motor for wiring schematic. The motor must rotate clockwise when viewed from the shaft end.

Fig. 22

1. Slide blower onto motor shaft until hub is flush with end of shaft then tighten set screws.
2. Adjust motor position until blower is parallel to motor mounting plate as outlined under BLOWER ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS.
3. Position motor mounting plate on the rear wall and secure with nuts and washers.
4. Replace the baffle panel.
5. Remove cardboard from the bottom of the oven cavity.
6. Check oven for proper operation then replace rack guides and racks

BLOWER AND MOTOR

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove HEATING ELEMENTS.
2. Disconnect motor harness (1, Fig. 23).

Close-up of a black electrical connector with wires, no visible text or symbols

Fig. 23

1. Pinch cord grip together to remove from rear panel.

Close-up of a black cable with a connector inserted into a wall, showing a white arrow pointing to the cable (no text or symbols visible)

Fig. 24

1. Push motor wiring harness/cord out hole in rear panel.
2. Remove blower baffle screws (2, Fig. 25) if applicable.

Close-up of a mechanical fan component with numbered callouts (1 and 2), no visible text or symbols on the fan itself.

Fig. 25

1. Remove motor mounting plate nuts (1, Fig. 25).
2. Place a piece of cardboard on bottom of oven cavity to protect its surface from any damage during motor assembly removal.
3. Pull motor assembly into oven cavity and place on cardboard.
4. Remove motor mounting bolts and washers and lift motor off mounting plate.

Close-up of an industrial electrical component with mounting flanges and a central motor (no visible text or symbols)

Fig. 26

NOTE: Motor graphics are shown with motor installed.

1. Remove drip pan from motor and install onto replacement motor.

Close-up of a mechanical component with curved slots and mounting holes, no visible text or symbols

Fig. 27

1. Reverse procedure to install.
2. Verify operation.

DOOR SWITCH

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the top front cover as outlined under COVERS AND PANELS.
2. Disconnect the lead wires to the door switch.
3. Remove the switch.

Fig. 28

1. Reverse procedure to install the replacement switch and check for proper adjustment as outlined under DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS.

DOOR WINDOW

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the screws at the top and bottom of door.

Fig. 29

1. Simultaneous doors:

A. If replacing window on the left door, remove the handle from the front of the door then remove door seal from the inside edge of the door.

1) Lift out the inner door panel and window assembly.
2) If replacing window on the right door, remove the screws along the inside edge (if applicable) of the door then remove the inner door panel and window assembly.

1. Remove the screws securing the window "tabs" to the door bracket and lift the window assembly out from the door frame.

INNER DOOR PANEL ASSEMBLY

graph TD
    A["GLASS"] --> B["REMOVE SCREWS"]
    B --> C["GLASS"]
    C --> D["TSP1427"]

Fig. 30

1. Reverse procedure to install the replacement window.

OVEN DOORS AND BEARINGS (INDEPENDENT DOORS) Ending at Serial Number 481916782

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the top front cover and bottom front cover as outlined under COVERS AND PANELS.
2. Remove the door switch lever.

Fig. 31

1. Remove the lower door seal strip to expose the mounting screws of the door assembly.

2. Remove the two (2) lower sill bolts by the lower door shaft and the four (4) counter-sunk screws from the lower sill.

Fig. 32

NOTE: The door assembly is heavy and will drop down once the last screw is removed. If removing door assembly with-out assistance, use caution.

1. Tilt the top of the door slightly forward and lift the door up until the bottom of the door shaft clears the opening in the sill.

2. Lay the door flat to prevent damage.

3. The top and bottom bearings are now accessible for inspection and/or replacement if needed.

A. If bearings are ok, proceed to step 8.
B. If replacing the top bearing, remove the top bearing retainer and top bearing.

Fig. 33

C. If replacing the bottom bearing, remove it from the door shaft or the lower sill opening.

1. 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 (INDEPENDENT DOORS) Starting at Serial Number 481916783

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove TOP FRONT COVER.
2. If servicing right side door, remove door switch lever (1, Fig. 34).

Close-up of a mechanical assembly with metal components and a numbered annotation (1), no readable text or symbols present.

Fig. 34

1. While supporting door, remove hex bolts holding upper bearing retainer (1, Fig. 35) and upper shaft bracket (2, Fig. 35).

Fig. 35

1. Lift door off lower shaft bracket.

NOTICE

Lay door on flat protective surface to service.

1. Reverse procedure to install.
2. Perform DOOR ADJUSTMENT if servicing right side door.

OVEN DOORS (SIMULTANEOUS DOORS) Ending at Serial Number 481916783

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

Assembly Removal

1. Remove the top front cover and bottom front cover as outlined under COVERS AND PANELS.
2. Remove the door switch lever.

Fig. 36

1. Remove the top bearing retainers and top bearings.

Fig. 37

1. Remove the lower door seal strip to expose the mounting screws of the door assembly.

A. Remove the two (2) lower sill bolts by the lower door shaft and the four (4) countersunk screws from the lower sill.

Fig. 38

NOTE: The door assembly is heavy and will drop down once the last screw is removed. If removing door assembly with-out assistance, use caution.

1. 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.
2. Lay the door assembly on a flat cushioned surface for disassembly.
3. Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT, DOOR CHAIN ADJUSTMENT (SIMULTANEOUS DOORS) and DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS.

Disassembly

1. Remove the door assembly as outlined in OVEN DOORS (SIMULTANEOUS) under ASSEMBLY REMOVAL.
2. Remove the door chain by loosening one of the turnbuckles.
3. Loosen the set screw on the sprocket of door being replaced.
4. Drive out the spirol pin from the sprocket of door being replaced.
5. Remove the door from lower sill bearings and sprocket.

Fig. 39

A. Door assembly parts are now accessible for inspection and/or replacement if necessary.

1. Reverse procedure to re-assemble the door assembly parts and check for proper adjustment as outlined under DOOR CHAIN ADJUSTMENT (SIMULTANEOUS DOORS) in SERVICE PROCEDURES AND ADJUSTMENTS.

OVEN DOORS (SIMULTANEOUS DOORS)

1. Remove TOP FRONT COVER and BOTTOM FRONT COVER.

2. Remove door switch lever.

Mechanical assembly with metal components and a labeled component (no readable text or symbols)

Fig. 40

1. Remove door chain by loosening one of the turnbuckles (Fig. 41).

Fig. 41

1. Loosen the set screw on the sprocket of door being replaced (Fig. 41).
2. Drive out the spiral pin from the sprocket of door being replaced (Fig. 41).
3. While supporting door, remove hex head bolts holding upper bearing retainer (1, Fig. 42) and upper shaft bracket (2, Fig. 42).

Fig. 42

1. Remove door(s) from lower sill bearings and sprocket Fig. 41.

NOTICE

Lay door on flat protective surface to service.

1. Reverse procedure to install.

NOTICE

Verify spacers are reassembled as found when removed.

1. Perform door adjustments.

A. DOOR ADJUSTMENT.
B. DOOR CHAIN ADJUSTMENT (SIMULATANEOUS DOORS).
C. DOOR SWITCH ADJUSTMENT.

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.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the screws that attach roller latch assembly to door.

Fig. 43

1. Reverse procedure to install.

DOOR CATCH ROLLER ASSEMBLY (INDEPENDENT DOORS)

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.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the top front cover as outlined under COVERS AND PANELS.
2. Remove the catch roller assembly.

FRONT VIEW

Fig. 44

1. Reverse procedure to install.
2. Adjust the catch roller as outlined under DOOR CATCH (ROLLER) ADJUSTMENT (INDEPENDENT DOORS) in SERVICE PROCEDURES AND ADJUSTMENTS.

MECHANICAL (KX) THERMOSTAT

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

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.

Fig. 45

NOTE: When installing probe guard, the probe should not extend beyond the guard.

1. Remove the thermostat bulb from the oven cavity by pushing it through the oven wall and into the control panel area.

NOTE: The hole in the oven cavity wall does not line up straight with the oven cavity outer shell, therefore the probe must be removed at an angle.

1. Reverse the procedure to install.

2. Adjust the thermostat as outlined under MECHANICAL (KX) THERMOSTAT CALIBRATION in SERVICE PROCEDURES AND ADJUSTMENTS.

HIGH LIMIT THERMOSTAT

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Take out racks from the oven.
2. Remove the high limit thermostat cover/mounting plate from inside the oven cavity at the top.

Fig. 46

1. Disconnect lead wires from high limit thermostat then remove high limit thermostat from cover/mounting plate.

Fig. 47

NOTE: Remove the old RTV sealer from the cover and mating surfaces inside the oven cavity and apply new high temperature RTV sealer before installing.

1. Reverse procedure to install.

INTERIOR LIGHTS (Rear Mounted, Round)

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Lamp

1. Remove racks.
2. Unscrew glass lens for the light being replaced then unscrew bulb.

NOTE: Use a cloth when handling bulb so you do not leave fingerprints on bulb.

Fig. 48

1. Replace bulb then reverse procedure to install.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Lamp Assembly

1. Remove lens and bulb.
2. Remove springs from retaining tabs (2 places) on the socket.

Fig. 49

1. Depress retaining tabs and pull socket out from the oven, far enough to disconnect lead wires.
2. Remove socket from the oven.
3. Attach lead wires to the replacement socket.
4. Insert socket into the hole in oven and push until socket is held in place by retaining tabs.
5. Install light bulb and lens.
6. Check for proper operation.

INTERIOR LIGHTS (Side Mounted, Square)

Bulb Replacement

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove racks and right-side hand rack guide.
2. Pull lamp cover off.
3. Grasp lamp using a clean cloth and remove from lamp assembly.

Fig. 50

1. Reverse procedure to install new bulb.

NOTE: Verify gasket (1, Fig. 51) is flat on lamp cover and not damaged.

Top-down view of a transparent plastic container with granular material inside, labeled with number 32221 (no text or symbols on the container itself)

Fig. 51

Lamp Assembly Replacement

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Remove racks.
2. Remove BULB if reusing.
3. Lift right side rack guide off oven cavity.
4. Pull lamp cover off from the top or bottom.
5. Insert narrow blade screwdriver into tab and bend out to release. Repeat with second tab.

Close-up of a transparent rectangular object with internal structures and two arrows pointing to it, mounted on a metal rod (no visible text or symbols)

Fig. 52

1. Pull lamp housing out of oven cavity.
2. Disconnect wires.

Close-up of a transparent plastic enclosure with coiled wires, no visible text or symbols

Fig. 53

1. Reverse procedure to install.

NOTE: Verify gasket (1, Fig. 54) is flat on lamp cover and not damaged.

Top-down view of a transparent plastic container with granular material inside, labeled with number 32221 (no text or symbols on the container itself)

Fig. 54

COOLING FAN

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

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. 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. Rotate the tab so that the fan will clear and remove the fan.

Fig. 55

1. Reverse the procedure to install the replacement fan and check for proper operation.

NOTE: The fan must be installed so air is pulled from outside 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.

NOTE: Ensure fan is seated "squarely" against the air tube and the oven bottom.

NOTE: The air deflector should be angled upwards at approximately 30 degrees to properly direct the air flow.

SERVICE PROCEDURES AND ADJUSTMENTS

WARNING

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.

SOLID STATE TEMPERATURE CONTROL CALIBRATION

1. Place a thermocouple in geometric center of oven cavity.
2. Set ON-OFF-COOL DOWN switch to ON.
3. Set temperature control dial to 350^ F.
4. Allow oven temperature to stabilize (normally 3 cycles).
5. Record temperature at which Heat lamp goes OFF and comes ON for at least two complete heating cycles.
6. Calculate differential by subtracting temperature indicated when lamp goes out from temperature indicated when lamp comes on.

Differential = Heat lamp OFF - Heat lamp ON

Example: 360^ (lamp off) - 340^ (lamp on) = 20^

A. Calculated differential should be less than 20^ F.

1) If differential is less than 20^ F, temperature control circuit is functioning properly.

a. Proceed to Step 7.

2) If differential is more than 20^ F:

a. Check temperature probe as outlined under TEMPERATURE PROBE TEST (SOLID STATE CONTROL).

b. If probe is functioning properly then temperature control is malfunctioning.

a) Install a replacement temperature control and check calibration.

1. Calculate average temperature by adding temperature indicated when lamp goes out to temperature indicated when lamp comes on and dividing this answer by 2.

[Temp. (lamp off) + Temp. (lamp on)] ÷ 2 = Average Temp. Example: (360° + 340°) ÷ 2 = 350°

A. If average temperature is less than 10^ F from dial setting, thermostat is properly calibrated.

B. If average temperature is more than 10^ F from dial setting, thermostat calibration must be adjusted.

1) Loosen temperature control knob set screw and remove knob from stem.

2) Access adjustment potentiometer located at 3 o'clock position (Fig. 56).

NOTE: If no access hole exists in overlay, you may carefully create one.

AI3777
Fig. 56
a. Turn clockwise to increase, counterclockwise to decrease temperature

b. Repeat average temperature calculation in Step 7.

NOTE: Allow oven to cycle at least two times between adjustments before performing calculation.

a) If average temperature still differs more than 10^ F from dial setting, adjust thermostat calibration until average temperature is within tolerance.

C. If above adjustment cannot be obtained, replace temperature control and check calibration.

MECHANICAL (KX) THERMOSTAT CALIBRATION

1. Place a thermocouple in the geometric center of the oven cavity.
2. Set the power switch to ON.
3. Set the thermostat dial to 350^ .
4. Allow the oven temperature to stabilize (normally 3 cycles).
5. Record the temperature when the thermostat cycles OFF and ON for at least three complete cycles.
6. 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^ (lamp off) - 340^ (lamp on) = 20^

A. The differential calculated should be less than 30^ F.

1) If the differential is 30^ or less, the thermostat is functioning properly. a. Proceed to step 7.

a. Proceed to step 7.
2) If the differential is more than 30^ F, the thermostat is malfunctioning.
a. Install a replacement thermostat and check calibration.

1. Calculate the average temperature by adding the temperature indicated when the heat lamp goes out to the temperature indicated when the heat lamp comes on and dividing this answer by 2.

[Temp. (lamp off) + Temp. (lamp on)] + 2 = Average Temp. Example: 360^ + 340^ + 2 = 350^

A. If the average temperature is 15^ F or less from the dial setting, the thermostat is properly calibrated.
B. If the average temperature is more than 15^ F of the dial setting, the thermostat calibration must be adjusted.

1) Remove the thermostat knob.
2) Hold the thermostat shaft and turn the inner set screw clockwise to decrease temperature or counterclockwise to increase temperature ( 14 turn = 35°F).

COUNTERCLOCKWISE TO INCREASE TEMPERATURE

1/4 TURN = 35°F

Fig. 57

1. Replace the knob and verify the setting is still at 350^ F.
2. Repeat step 7 until the average temperature is within tolerance.

NOTE: Allow the oven to cycle at least two times between adjustments before performing the calculation.

A. After the final adjustment is made and the average temperature is within tolerance, remove the knob and apply a nonpermanent type sealer around the head of the set screw

1. If the above adjustment cannot be obtained:

A. Turn the power switch OFF.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

B. Install a replacement thermostat and check calibration.

SOLID STATE TEMPERATURE CONTROL TEST

WARNING

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.

1. Remove the RIGHT SIDE PANEL.

NOTE: If right side panel is not accessible, this component can be serviced by removing CONTROL PANEL.

1. Place a thermocouple in the geometric center of the oven cavity.

NOTE: Oven temperature must be below 450°F.

NOTE: If oven is equipped with "Cook and Hold" option, set to Cook (normal cooking) before continuing.

1. Set the temperature control to the maximum setting.

2. 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.

3. Turn the power switch to ON.

Fig. 58

1. Check for proper voltage across terminals COM AC to 120VAC or COM AC to 208-240VAC for power to the control.

A. If correct, proceed to step 7.

B. If incorrect, problem is not with the temperature control. See TROUBLESHOOTING.

1. Check relay voltages on the board:

A. For 120VAC controls - check across OUTPUT RELAY terminal (left side) to 120 VAC terminal for input to the internal relay. Check across OUTPUT RELAY terminal (right side) to 120 VAC for output from the internal relay.

B. For 208-240VAC controls - check across OUTPUT RELAY terminal (left side) to 208-240 VAC terminal for input to the internal relay. Check across OUTPUT RELAY terminal (right side) to 208-240 VAC for output from the internal relay.

1) If input voltage to the internal relay is correct, proceed to step 8. If input voltage to the internal relay is not present, problem is not with the temperature control. See TROUBLESHOOTING.

2) If output voltage from the internal relay is correct proceed to step 8. If output voltage from the internal relay is not correct, check temperature probe as outlined under TEMPERATURE PROBE TEST (SOLID STATE CONTROL).

1. Set the temperature control to the minimum setting.

NOTE: Oven temperature must be above 300^ F.

1. Check for zero (0) volts AC across terminals OUTPUT RELAY terminal (right side) to 120 VAC or OUTPUT RELAY terminal (right side) to 208-240 VAC for no output from the internal relay.

A. If correct, temperature control is functioning properly.
B. If incorrect, check temperature probe as outlined under TEMPERATURE PROBE TEST (SOLID STATE CONTROL).

1) If temperature probe is OK:

a. Turn the power switch OFF.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

b. Replace the temperature control and check calibration as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION.

TEMPERATURE PROBE TEST (SOLID STATE CONTROL)

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

NOTE: The temperature probe used in conjunction with the Solid State Temperature control is an RTD

(resistance temperature detector) of the Thermistor type. As temperature increases the resistance value decreases.

1. Remove the right side panel as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.

NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS.

1. Place a shielded thermocouple in the geometric center of the oven cavity and determine the temperature in the oven cavity.
2. Remove the probe lead wires from the solid state temperature control.
3. Test the probe with an ohmmeter.

A. If the measured resistance values are inside the given tolerance then the probe is functioning properly.
B. If the measured resistance values are outside the given tolerance then replace the probe and retest.

1) Check oven for proper operation.

1. Reverse procedure to install.

TEMP (°F)	OHMS * TEMP		(°F) OHMS *
77 90,00	00 360 822
240 4,07	7 380 656
260 3,01	6 400 529
280 2,26	6 425 424
300 1,72	6 450 334
320 1,33	2 475 266
340 1,04	1
* Resistance in ohms ± 10%

HEATING ELEMENT TEST

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Turn the power switch ON and set the oven temperature control to the highest setting.

2. Measure the voltage at the heating element terminals and verify it against the data plate voltage.

A. If voltage is incorrect, find the source of the problem.

B. If voltage is correct, check current draw (amps) through the heating element lead wires.

NOTE: This method is preferred over a resistance check when a clamp on type amp meter is available.

1) If current draw is correct then heating element is functioning properly.

2) If current draw is not correct, turn the power switch OFF and disconnect the electrical supply to the oven.

a. Replace HEATING ELEMENTS Ending at Serial Number 481916863.

C. If unable to check current draw, a resistance check may indicate a malfunctioning element.

1) Turn the power switch OFF and disconnect the electrical supply to the oven.

2) Remove the lead wires from the heating element and check resistance (ohms).

1. Check for proper operation.

SIDE MOUNTED ELEMENTS
VOLTAGE AMPS	PER ELEMENT KW PER ELEMENT	OHMS PER ELEMENT
208 (red) 9.6 2	21.6
240 (blue) 8.3 2	28.8
NOTES:	Values in the table are nominal. Tolerance is +5/-10%.Voltage values are @ 60HZResistance values (ohms) are @ room temperature.Color coding located on the one corner of mounting bracket.

REAR MOUNTED ELEMENTS
VOLTAGE AMPS	PER ELEMENT KW PER ELEMENT	OHMS PER ELEMENT
208 19.2 4 10.8
240 16.6 4 14.4
NOTES:	Values in the table are nominal. Tolerance is +5/-10%.Voltage values are @ 60HZResistance values (ohms) are @ room temperature.Replaced as a set, check individually.

BLOWER ADJUSTMENT

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

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. Check for squareness of the blower to the motor mounting plate at the top, bottom, left and right of the blower.

A. If the blower is square then tighten motor mounting bolts and proceed to step 4.
B. If the blower is not square continue adjusting until proper spacing is achieved then tighten motor mounting bolts

NOTE: If necessary, place shims between motor and frame.

Fig. 59

1. Reverse the procedure to install.

DOOR ADJUSTMENT

1. Check the doors to make sure they have a .125 (1/8") gap between them and that the vertical edge of the door is parallel to the vertical door seal. If the doors are not positioned in this manner, adjust the doors as described.

Fig. 60

1. Remove the TOP FRONT COVER.
2. Loosen the screws/bolts that secure the upper door brackets just enough to allow door movement.

Figure Shown below (Left Side) is ending at Serial Number 481916782.

Fig. 61

Figure shown below (Left Side) is starting at Serial Number 481916783.

Close-up of a mechanical component with four bolts and a central shaft, no visible text or symbols

Fig. 62

1. Move the door until proper alignment is achieved then tighten the screws/bolts on the upper door bearing hardware.
2. Repeat Step 3 and Step 4 on the opposite door, if necessary.
3. Install TOP FRONT COVER.

DOOR STRIKE ADJUSTMENT (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.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove top front cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.
2. Open the doors and inspect door strike for proper shape.

A. Replace if bent. Do not bend strike plate.
B. If adjustment is necessary, loosen fasteners, close doors and insure contact between door inner surface and upper horizontal seal. Slide door strike plate until contact with roller latch is made. Tighten strike plate fasteners

Fig. 63

1. Open and close the doors several times while observing the roller latch and strike plate operation.

A. Replace roller latch if malfunctioning as outlined under ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) and adjust as outlined in this procedure.

1. 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.

DOOR CATCH ROLLER ADJUSTMENT (INDEPENDENT DOORS)

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.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the top front cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.
2. Open the doors and inspect the door strike for proper shape.

Fig. 64

A. Replace if bent and adjust as outlined in this procedure.

1. Open and close the doors several times while observing the catch roller operation.

A. Replace if malfunctioning and adjust as outlined in this procedure.

NOTE: Shims may be required under the door strike to raise it, before the proper door tension adjustment can be set.

1. Apply lubricant around the spring. See LUBRICATION under GENERAL.
2. Close the doors and check them for proper alignment.

A. Doors should be centered and parallel at the top and bottom, in the oven cavity opening. See DOOR ADJUSTMENT.

1. With the doors closed, observe the position of the catch roller "ball" in relation to the door strike.

A. Ensure the catch roller "ball" is centered (left to right) to the door strike.

1) Adjust alignment, if necessary.

B. Open the right side door and view the left side door catch roller and strike. Ensure the door catch roller "ball" is resting upon the angular surface of the door strike. Repeat on the opposite door.

1) If adjustment is necessary, loosen the mounting screws then slide the door strike from "front to back" until the roller rests upon the angular surface of the door strike. Tighten screws and check operation.
2) If proper adjustment cannot be achieved, add shims beneath the door strike. Repeat step 6 thru this step.

NOTE: DO NOT BEND THE DOOR STRIKE.

1. Each oven door should open with a force of 8 to 25 pounds when pulled at the handle. See TOOLS under GENERAL.

A. Adjust catch roller tension as follows:

1) Turn the set screw inside the catch assembly housing clockwise to increase tension on the catch roller and counterclockwise to decrease tension on the catch roller.

NOTE: The amount of tension on the catch roller determines the opening force of the door.

2) Continue adjustment until proper door operation is achieved.

SIDE VIEW CUTAWAY

Fig. 65

DOOR SWITCH ADJUSTMENT

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Remove the top front cover as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.

2. Door operation:

A. Independent doors - The switch actuator should be operated by the switch lever when the right door is between 1" and 1 1/2" from being closed.
B. Simultaneous doors - The switch actuator should be operated by the switch lever when the right door is 1/2" from being closed.

1. If adjustment is necessary, bend the switch actuator to obtain the proper setting.

Fig. 66

1. Install the top front cover.
2. Apply power to the oven and check for proper operation.

DOOR CHAIN ADJUSTMENT (SIMULATANEOUS DOORS)

Introduction

When the oven doors are in proper adjustment, as the doors come together, the right door will lead the left door in closing by about 1/4 inch. The doors will feel like they are self closing the last 1/2 inch of travel.

Procedure

1. Remove the lower sill cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.
2. Close doors and check door chain for factory setting.

A. Turnbuckles should be 5 to 5 1/2 inches apart.
B. Short eye bolt should be connected to the end of the chain that goes to the front of the sprocket.
C. 2 links of the chain should not be engaged at the rear of the sprocket.
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. The stop cable must be positioned where it moves freely and does not get pinched.

1. Position door chain assembly to factory setting if the conditions in step 2 are not met.

Fig. 67

1. If right door does not lead the left door in closing:

A. Loosen locknuts on both turnbuckles.
B. Loosen left turnbuckle.
C. Tighten right turnbuckle.
D. Tighten locknuts on both turnbuckles.

1. If the right door leads the left door by more than 3/8 inch:

A. Loosen locknuts on both turnbuckles.
B. Loosen right turnbuckle.
C. Tighten left turnbuckle.
D. Tighten locknuts on both turnbuckles.

1. Check door for proper operation.

NOTE: The locknuts must be tight during testing or the adjustment will not hold.

A. If doors do not close properly, repeat step 4, 5 and 6.
B. If doors operate properly, continue to step 7.

1. Install the lower front cover.

COMPUTER CONTROL

Operation

Refer to the Instructions Manual F31159 for specific operating instructions.

Setup Mode

NOTE: Use the setup mode to verify that the control is configured to the factory settings which result in the proper operation of the oven. If the CAL1 parameter is other than zero, determine if it is still needed before resetting to zero. See COMPUTER CONTROL TEMPERATURE CALIBRATION.

NOTICE

Changing the C_F, InP1, rL1 & rH1 parameters will default all menus to the factory settings.

1. Use this key sequence to access the setup mode.

Up arrow; Rack 1; Temperature; Temperature; Down arrow; Rack 1

Fig. 68
2. Once in the setup mode the display will alternate between the parameter and programmed data.
• To change data to the factory setting, use the arrow keys.
• To select the next parameter, press the Rack 1 key.
• After the last Parameter and Data is viewed, press the Rack 1 key a final time to exit the setup mode and return to operations mode. The current set point temperature will be displayed.
• After 1 minute of no key activations, the control will return to operation mode.

1. Listed are the parameters and data you should find.

MENU	ALTERNATINGON DISPLAY
	PARAMETER DATA
Celsius_Fahrenheit C	F F
Guard Band gb 4000
TemperatureCompensation	tcnP OFF
Input Type 1 InP1 J
Range Low 1 rL1 75
Range Hight 1	rH1	500
Hysteresis HYS1	3
Calibration Offset	CAL1	0
Exit Setup Mode andreturn to OperationMode.	Set point temperature isdisplayed or if call for heat,dashers(---) displayed.

Probe Test

If the oven is not heating or displaying the proper temperature, the temperature probe may be malfunctioning. Determine if the probe is good or causing the operational problem. Temporarily, disconnect the existing probe lead wires from the computer control and connect the lead wires from a known good "J" type thermocouple. Secure the sensing end of the thermocouple near the probe.

Turn the power switch ON and set the dial to 350^ F.

If the oven reaches the set temperature and cycles with the temporary thermocouple, then the existing probe is malfunctioning. Replace temperature probe with the correct part and check for proper operation.

Solid State Relay Test

The solid state relays "SSR1 or SSR2" supply power to the blower motor "high" or "low" fan speed terminals when the SSR is energized by the output voltage from the computer.

To test solid state relay "SSR1" (high fan speed), the computer control should be in the "Normal Cooking Mode". To test solid state relay "SSR2" (low fan speed), the computer control should be in the "Roast & Hold Mode".

Fig. 69

1. Remove the right side panel as outlined under COVERS AND PANELS.

2. Turn the power switch ON.

A. If the blower motor comes on, the SSR is functioning properly.

B. If the blower motor does not come on, proceed to step 3.

1. Check for +5 VDC on the input side of SSR (terminals 3 & 4).

A. If +5 VDC is present, continue to step 4.

B. If no voltage is present, computer control is not functioning properly.

1. Check for proper input voltage on the load side of SSR terminal 1 and the power connection on the other side of the supply.

A. On 208 & 240 volt ovens, the supply connection is on the terminal block (L2 for single phase, L3 for three phase). The measured voltage should be identical to the supply.

B. On 480 volt ovens, the supply connection is on the secondary side of the 480V transformer, terminal X4 (wire #79).

The measured voltage should be 240 volts.

1. If input voltage is correct on the load side of SSR terminal 1, proceed to step 6.

A. If input voltage is not correct, find the source of the problem.

1. Check output voltage on the load side of SSR terminal 2.

A. If voltage is correct, SSR is functioning properly.

B. If no voltage is present on the load side of SSR terminal 2, the SSR is not functioning properly.

1. Turn the power switch OFF.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

1. Replace the SSR and check for proper operation.

COMPUTER CONTROL TEMPERATURE CALIBRATION

1. Place a thermocouple in the geometric center of the oven cavity.

2. Turn the power switch ON.

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.

1. Press the set key then temperature key to enter the temperature set mode.

A. The display will alternate between the term "StPt" (set point) and the current oven temperature setting.
B. Press the up or down arrow keys to make the proper selection.
C. Press the set key again to save the change and exit the temperature set mode.

1. Allow the oven temperature to stabilize (normally 3 cycles).
2. Compare the controls set point temperature to the thermocouple meter reading when the heat light goes out.

A. A temperature variance more than 5^ F indicates an adjustment is needed.

1) To make the adjustment, proceed to step 6.
2) If temperature variance is less than 5^ F, computer control is functioning properly.

1. Enter the setup mode as outlined in SETUP MODE under COMPUTER CONTROL.

A. Advance through the menu until CAL1 (Calibration Offset) appears.

1) If the thermocouple reading is higher than set point temperature, press the down arrow key and enter a negative offset value that is equal to the number of degrees above the 5^ F tolerance.
2) If the thermocouple reading is lower than set point temperature, press the up arrow key and enter a positive offset value that is equal to the number of degrees below the 5^ F tolerance.
3) Exit the setup mode.

1. Allow the oven to cycle at least two times between adjustments.

A. If the temperature variance still differs more than 5^ F from the set point, verify the correct calibration offset value was entered and retained.

1) Adjust the calibration offset value as outlined in step 6, until the cycling temperature is within tolerance.

B. If the above adjustment cannot be obtained:
C. Turn the power switch OFF.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

D. Replace the computer control and check for proper operation.

COMPUTER CONTROL OPERATIONAL TEST

The computer controls "Calibration Mode" is used to manually test:

• Outputs of the control
• Keypad functionality
• Verify display and LEDs functionality

Additionally, if a problem is encountered during the output test, a "Restore Factory Settings" option is available.

NOTICE

The calibration mode contains several adjustable parameters that must not be changed. For the "CALY" (Calibration) Parameter, the default data option selected must be "no".

Listed below are the parameters and data you should find in the calibration Mode.

MENU	ALTERNATING ON DISPLAY
	PARAMETER DATA
Calibrate (must display no)	CALY no
Logic Output Test (see step 3)	LgOt* *g displays as a 9	0
Logic Inputs "LI" (Factory Only)	LI 21
Keyboard (see step 4)	HEY 0
Display Test (AI segments of display and the LED's are tested)	—	sequence of characters in display window
Exit Calibration Mode and return to Operation Mode	Set point temperature is displayed or if call for heat, dashers (---) displayed.

NOTE: While in the calibration mode, on all parameters except the Logic Output Test (LgOt), the control outputs will be OFF.

• To change the programmed data, use the arrow keys.
• To select the next parameter, press the Rack 1 key.

• At the end of the test, the control automatically exits the Calibration Mode and returns to the Operation Mode.
  • After 1 minute of no key activations, the control will return to operation mode.

• Use this key sequence to access the calibration mode. Up arrow; Down arrow; Rack 1; Down arrow; Temperature; Rack 1.

Fig. 70

1. Once in the calibration mode the display will alternate between the parameter and programmed data. The computer control outputs are turned OFF.

A. Convection fan stops.
B. Heating stops.

NOTE: If the control was calling for heat when the calibration mode was entered, heating will resume after exiting the test mode.

1. Press the Rack 1 key to accept the default "no" under the "CALY" (calibrate) parameter and advance the display menu to the "LgOt" (logic output) test. In this mode, the control and logic outputs can be turned ON for testing only.

A. Use the arrow keys to change the display to the appropriate number for testing. Each test starts automatically, several seconds after number is selected.

1) #0 - All control outputs are OFF (fan & heat OFF).

1 - Heat comes ON (2CON is energized).

5 - Convection fan comes ON (High or Low speed SSR is energized).

8 - Electronic beeper (external) sounds.

B. If the output tests are completed successfully, proceed to step 4.
C. If the output tests are not completed successfully, find the source of the problem. If the problem cannot be repaired, replace the component and check for proper operation.

1. Press the Rack 1 key twice to advance past the "LI" (Logic Inputs test) and reach the "HEY" (keyboard) test.

A. Press the desired key to display the corresponding hexadecimal code. This code is used internally by the control to identify the key being pressed. See table below.

KEY CODE KEY	CODE
Up Arrow 40 Start/Stop 4
Down Arrow 80 Temp 20
12 menu 800	Rack 1	10 *
3/4 menu 4000	Rack 2	400
5/6 menu 2 Rack	3 2000
Set	200	Rack 4	1
Time	1000	Rack 5	8
Roast & Hold	8000
* Displays 10 momentarily then alternates between Hey and 0. If pressed again, advances to the next test.

B. If the code displayed is not correct for the key pressed, then the keyboard is malfunctioning.

1) Turn the power switch OFF.

WARNING

Disconnect the electrical power to the machine and follow lockout / tagout procedures. There may be multiple circuits. Be sure all circuits are disconnected.

C. Replace the computer control and check for proper operation.

1. Press the Rack 1 key to advance the display menu to the "dISP" (display) test. A test sequence automatically runs on the display and control LEDs for a visual verification that all segments in the LED display and the internal LEDs are functioning.
2. At the end of the test, the control exits the calibration mode and returns to the Operation Mode.

NOTE: If the computer control does not appear to be functioning properly, do not restore factory settings until verifying the control is configured properly as outlined in SETUP MODE under COMPUTER CONTROL and performing the COMPUTER CONTROL OPERATIONAL TEST as outlined in the above section.

1. Enter the "Calibration Mode" by using the key sequence stated in step 1 under COMPUTER CONTROL OPERATIONAL TEST.

A. The computer control outputs are turned OFF.
B. The display will alternate between "CALY" and "no".

1. Press the up or down arrow key until the "rESt" parameter displays.
2. Press the Rack 1 key and "no" displays.
3. Press the up or down arrow key to change the display to "YES".
4. Press the Rack 1 key to select this data option and then advance the menu to the "LgOt" (logic output test).

NOTE: The "g" in LgOt displays as a "9".

1. Press the Rack 1 key twice to advance past the "LI" (Logic Inputs test) and the "HEY" (keyboard) test.
2. The "dISP" (display) test sequence automatically runs.
3. At the end of the test, the control exits the calibration mode and returns to the Operation Mode.
4. Enter the "SETUP MODE" as outlined under COMPUTER CONTROL and perform the procedure.

SERVICE PROGRAMMING AND TESTING FOR 3700 COMPUTER CONTROL

NOTE: Press X to go back to previous screen. User interface system menu program instructions for MENU PRG and USB are located in COMPUTER CONTROLS GUIDE.

SYSTEM DIAGNOSTIC

1. Press Program.

Fig. 71

1. Press number 3 for SYS DIAG.

- System Diagnostic menu will appear.

Fig. 72
• 1. OUTPUTS

Fig. 73
- Press corresponding number for testing function selection. Example: Press 1 to test Fan function.

• 2. INPUTS

Fig. 74
- Check status of a function.
Example: Door is open or close.

• 3. BUTTONS

Fig. 75
- Button test verifies each button is programmed and working.
Example: Push a button on the keypad to verify it is connected and working. Each buttons function shows on display.

SYSTEM SETTINGS

1. Press Program.

Fig. 76

1. Press 4 for SETTINGS.

- System Settings menu will appear.

Fig. 77

- Press corresponding number to change settings. Example: Press 4 to change HEAT to Electric.

SETTING TEMPERATURE OFFSET

• Check center of oven temperature with temperature tester.
• Press number 6.
• Use arrow keys to offset DISPLAY temperature setting to match center of oven temperature.

Power Switch (S1) .... Determines the mode of operation; ON, OFF, or COOL DOWN.

Oven Light Switch Controls the oven cavity lights.

(S2)....

Fan Speed Switch Controls blower motor speed between High and Low settings.

(S3)....

Alarm/Buzzer	Signals the end of a "Cook" cycle when cooking time expires.
Cook Timer	Counts the "Cook" time of the product and signals the buzzer at the end of the cycle.
Door Switch	Allows the oven to operate when the doors are closed but stops the oven from operating when the doors are opened.
Blower Motor	Operates the oven cavity blower (convection fan).
Solid State temperature Control	Monitors temperature sensor and regulates the oven cavity temperature by controlling 2CON to energize the heating elements when the control calls for heat.
High Limit Thermostat	Protects the oven from temperatures above 550°F by removing power from the heating circuit. Auto resets at 500°F.
1CON & 2CON	Provides power to heating elements when both are energized. 1CON is energized when power switch is turned ON. 2CON is energized by the temperature control when a call for heat is made.
Power ON Light	Lit whenever the power switch (S1) is turned to ON or Cool Down mode.
Heat Light	Lit whenever temperature control is calling for heat.
Temperature Probe	Senses the oven temperature and converts the temperature into a resistance valve which is monitored by the temperature control board. The probe is an RTD (resistance temperature detector) of the Thermistor type. As temperature increases the resistance value decreases.
Cooling Fan	Circulates cooler air from outside the oven to cool components in the control area.
Fuses	Protect control circuit.

COMPONENT LOCATION

TOP VIEW

Fig. 80

WC4ED

1) Power removed from heating elements and heating stops.

1. The oven will continue to cycle on the thermostat until the doors are opened or the power switch (S1) is turned to the OFF or COOL DOWN position.

SEQUENCE OF OPERATION - with Solid State Temperature Control

Cook Cycle

1. Conditions.

A. Oven connected to correct voltage and is properly grounded.
B. Power switch (S1) OFF.
C. Temperature dial set to lowest temperature (fully CCW).
D. High limit thermostat CLOSED.
E. Oven doors closed (door switch contacts CLOSED).
F. Oven cavity temperature below 140^ F.

1. Power switch (S1) turned ON.

A. Power ON light (Amber) comes ON.
B. 1CON coil energized.
C. Solid state temperature control energized.
1) Heating light (Clear) comes ON. 2) 2CON coil energized.
2) 2CON coil energized.
a. Heating elements powered and heating starts.
D. Blower motor energized.

NOTE: Motor speed (Hi/Low) depends on position of fan speed switch (S3).

E. Component cooling fan energized.

F. Power to oven cavity light switch (S3) wire #1. Turns cavity lights ON/OFF; does not affect "Cook" cycle.

1. Set temperature dial to desired "Cook" temperature.

2. Oven reaches set temperature.

A. Temperature control de-energizes internal relay and the normally open (N.O.) contacts OPEN.

1) Heat light goes out.

2) 2CON coil de-energized.

a. Power removed from heating elements and heating stops.

1. The oven will continue to cycle on the temperature control until the doors are opened or power switch (S1) is turned to the OFF or COOL DOWN position.

SEQUENCE OF OPERATION - VC4EC, VC6EC (Computer Control)

Refer to diagram 6966 for electrical sequence of operation.

Cook Cycle

1. Conditions.

A. Oven connected to correct voltage and is properly grounded.
B. Power switch (S1) OFF.
C. Computer control is setup properly and ready to use. NOTE: The set point temperature of the computer control will be the last temperature that was set.
D. High limit thermostat CLOSED.
E. Oven doors closed (door switch contacts CLOSED).
F. Oven cavity temperature below 140°F.

1. Power switch (S1) turned ON.

A. 1CON coil energized.
B. 24VAC transformer (T1) is energized.

1) Computer control is energized and performs a power ON self test before energizing outputs. If the control passes self test, then the outputs are energized and operation sequence continues. If control does not pass self test then the corresponding error code is displayed.

C. Component cooling fan energized.

D. Power is connected to:

1) Terminal 1 on solid state relay 1 (SSR1 - load side) and solid state relay 2 (SSR2 - load side).

2) Pin 3 (C3-3) on computer control (input "IN-2").

3) Oven cavity light switch (S2). Turns cavity lights ON/OFF; does not affect "Cook" cycle.

1. Computer control senses oven cavity temperature through probe input. With the oven cavity temperature below set point, the output from pin C3-2 is activated.

A. Oven "Heat Light" on the control comes ON.

B. 2CON coil energized.

1) Heating elements powered and heating starts.
C. The controls 5VDC output from pins C2-2 (-) and C2-8 (+) is activated and SSR1 relay is energized.
1) Convection fan motor is energized (High speed).

1. Oven reaches set point temperature.

A. Computer control de-activates the output from pin C3-2.

1) 2CON coil de-energized.

a. Power removed from heating elements and heating stops.

B. Oven "Heat Light" on the control goes out.
C. Oven "Ready Light" on the control comes ON.
D. Electronic beeper sounds momentarily.

1. The oven will continue to cycle on the computer control until the doors are opened or power switch (S1) is turned to the OFF or COOL DOWN position.

Temperature and Time Cycle (Cooking)

NOTE: The computers internal "Cook" timer operates independently of the heating cycle. Additional time can be set or the timer can be stopped and re-started throughout the cooking cycle. Refer to the Instructions Manual for specific operating instructions of the oven Computer Control.

Roast and Hold Cycle

NOTE: For a detailed explanation of the "Roast & Hold" mode, refer to the Instructions Manual F31159 as outlined under SETTING THE OVEN FOR ROAST & HOLD and ROAST & HOLD OPERATION. In "Roast & Hold" mode, the operation of the computer control is identical to the normal Cook Cycle with these exceptions:

1. Oven "Roast & Hold" light on the control comes ON.
2. Convection fan will operate at Low speed, throughout the "Roast & Hold" cycle.

A. The computer control 5VDC output from pins C2-2 (-) and C2-8 (+) is de-activated and SSR1 relay is de-energized.
1) Power is removed from convection fan motor high speed terminal.
B. The computer control 5VDC output from pins C2-1 (-) and C2-8 (+) is activated and SSR2 relay is energized.
1) Power is applied to the convection fan motor low speed terminal.

1. Beeper sounds momentarily to indicate the end of first stage cooking (oven operates normally at the temperature and time selected until time expires).
2. The display flashes HOLD as the oven enters HOLD mode. This is also considered second stage cooking (oven heating stops but product continues to cook on residual heat).

A. Convection fan motor is de-energized.

1. 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.

A. Convection fan motor energized (Low speed).

1. The oven continues to cycle in this manner until one of the following occurs:

A. The "Roast & Hold" mode is turned OFF.
B. Power switch (S1) is turned to the OFF or COOL DOWN position.

Cool Down Cycle

1. Conditions.

A. Oven is ON.
B. Oven cavity temperature needs to be lowered.
C. Doors are open (door switch contacts OPEN).
D. Power switch (S1) set to either ON or OFF.

1. Power Switch (S1) turned to COOL DOWN.

A. Power is connected through power switch (S1) to the convection fan motor high speed terminal.

1) Convection fan motor energized (High speed).

1. The oven will continue to operate in COOL DOWN mode until the power switch (S1) is turned to the OFF or ON position.

SCHEMATICS AND WIRING DIAGRAMS

VC4ES, VC6ES with Mechanical (KX) Controls, 208-240V Schematics

VC4ES, VC6ES with Mechanical (KX) Controls, 208-240V Wiring Diagram

VC4ES, VC6ES with Mechanical (KX) Controls, 480V Schematic

VC4ES, VC6ES with Mechanical (KX) Controls, 480V Wiring Diagram

VC4ED, VC6ED with Solid State Temperature Control, 208-240V Schematic

VC4ED, VC6ED with Solid State Temperature Control, 208-240V Schematic - Starting at Serial Number 481916864

VC4ED, VC6ED with Solid State Temperature Control, 208-240V Wiring Diagram

VC4ED, VC6ED, with Solid State Tempature Control, 208-240V Wiring Diagram - Starting at Serial Number 481916864

VC4ED, VC6ED with Solid State Temperature Control, 480V Schematic

VC4ED, VC6ED with Solid State Temperature Control, 480V Wiring Diagram

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard) Schematic

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard) Wiring Diagram

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard) Schematic

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard) Wiring Diagram

VC4ED and VC6ED 480V Wire DiagramSchematic

VC4ED and VC6ED Wire DiagramSchematic

VC4ES & VC6ES 208-240V.

VC4ES, VC6ES with Mechanical (KX) Controls, 208-240V

VC4ES, VC6ES with Mechanical (KX) Control, 208-240V

Fig. 84

VC4ES & VC6ES 480V.
USE FIELD WIRE SUITABLE FOR 90°C.

DERRIVED FROM: 426663-1 REV. C
SEE WIRING DIAGRAM 426662 (6970, 6971)

VC4ES, VC6ES with Mechanical (KX) Controls, 480V

9	AB	WIRE NUT BLUE		-
1	Z	TRANSFORMER 1KVA 480-240 V.		-
2	Y	LAMP ASSEMBLY 120V. 40W.		-
1	X	SWITCH, TOGGLE D.P.D.T. (OD)		-
1	V	MOTOR 1/3 HP. 2 SPEED GE.		-
2	T	CONTACTOR 40A 3 POLE		-
1	S	TERMINAL BLOCK 3 POLE		-
2	R	FUSE & HOLDER 15A	HOLDER
			FUSE
6	L	ELEMENT, 20 KW. 480V.		-
1	K	LIMIT CONTROL 550F		-
2	J	BLOCK/PORCELIAN ASSEMBLY		-
2	H	SWITCH, LIMIT (DOOR)		-
1	G	BUZZER 230 VOLT		-
1	F	TIMER, 230 VOLT	1-HR, 60 HZ.
			5-HR, 60 HZ.
1	E	TEMP. CONTROL "KX-112"		-
1	D	FAN. COOLING 230 V.		-
1	C	LIGHT, "POWER ON", "HEATING" 250V.		-
1	B	SWITCH, TOGGLE D.P.D.T		-
1	A	SWITCH, TOGGLE S.P.S.T		-
DATE:	REV.	DESCRIPTION:		PDX.

graph TD
    A["ON/OFF/COOL DOWN"] --> B["POWER ON"]
    B --> C["HEATING"]
    C --> D["THERMOSTAT"]
    D --> E["LIGHTS"]
    E --> F["SPEED"]
    F --> G["BUZZ"]
    G --> H["TONIL"]
    H --> I["1"]
    H --> J["2"]
    H --> K["3"]
    H --> L["4"]
    H --> M["5"]
    H --> N["6"]
    H --> O["7"]
    H --> P["8"]
    H --> Q["9"]
    H --> R["10"]
    H --> S["11"]
    H --> T["12"]
    H --> U["13"]
    H --> V["14"]
    H --> W["15"]
    H --> X["16"]
    H --> Y["17"]
    H --> Z["18"]
    H --> AA["19"]
    H --> AB["20"]
    H --> AC["21"]
    H --> AD["22"]
    H --> AE["23"]
    H --> AF["24"]
    H --> AG["25"]
    H --> AH["26"]
    H --> AI["27"]
    H --> AJ["28"]
    H --> AK["29"]
    H --> AL["30"]
    H --> AM["31"]
    H --> AN["32"]
    H --> AO["33"]
    H --> AP["34"]
    H --> AQ["35"]
    H --> AR["36"]
    H --> AS["37"]
    H --> AT["38"]
    H --> AU["39"]
    H --> AV["40"]
    H --> AW["41"]
    H --> AX["42"]
    H --> AY["43"]
    H --> AZ["44"]
    H --> BA["45"]
    H --> BB["46"]
    H --> BC["47"]
    H --> BD["48"]
    H --> BE["49"]
    H --> BF["50"]
    H --> BG["51"]
    H --> BH["52"]
    H --> BI["53"]
    H --> BJ["54"]
    H --> BK["55"]
    H --> BL["56"]
    H --> BM["57"]
    H --> BN["58"]
    H --> BO["59"]
    H --> BP["60"]
    H --> BQ["61"]
    H --> BR["62"]
    H --> BS["63"]
    H --> BT["64"]
    H --> BU["65"]
    H --> BV["66"]
    H --> BW["67"]
    H --> BX["68"]
    H --> BY["69"]
    H --> BZ["70"]
    H --> CA["71"]
    H --> CB["72"]
    H --> CC["73"]
    H --> CD["74"]
    H --> CE["75"]
    H --> CF["76"]
    H --> CG["77"]
    H --> CH["78"]
    H --> CI["79"]
    H --> CJ["80"]

VC4ES, VC6ES with Mechanical (KX) Control, 480V

Fig. 87

VC4ED & VC6ED 208-240V.

USE FIELD WIRE SUITABLE FOR 90°C.
208 OR 240 VOLT 1 PHASE SUPPLY 208 OR 240 VOLT 3 PHASE SUPPLY

VC4ED, VC6ED with Solid State Temperature Control, 208-240V Schematic

WKED & X,VC4ED & 6,HEC5 & X 208-240V.
DERIVED FROM 426667-1 Rev G

AI4899

VC4ED, VC6ED with Solid State Temperature Control, 208-240V - STARTING AT SERIAL NUMBER 481916864

9	AB	WIRE NUT BLUE		-
2	Y	LAMP ASSEMBLY 120V. 40W.		-
1	X	SWITCH, TOGGLE D.P.D.T. (CO)		-
1	V	MOTOR 1/3 HP. 2 SPEED GE.		-
2	T	CONTACTOR 40A 3 POLE		-
1	S	TERMINAL BLOCK 3 POLE		-
2	R	FUSE & HOLDER 15A	HOLDER
			FUSE
1	P	PROBE,THERMISTOR		-
6	L	ELEMENT, 2.0 KW	208 VOLT
			240 VOLT
1	K	LIMIT CONTROL 550F		-
1	J	BLOCK,PORCELIAN ASSEMBLY		-
1	H	SWITCH, LIMIT (DOOR)		-
1	G	BUZZER 230 VOLT		-
1	F	TIMER, 230 VOLT	1-HR, 60 HZ.
			5-HR, 60 HZ.
1	E	TEMP. CONTROL 'G-S'		-
1	D	FAN, COOLING 230 V.		-
1	C	LIGHT, "POWER ON", "HEATING" 250 V.		-
1	B	SWITCH, TOGGLE D.P.D.T		-
1	A	SWITCH, TOGGLE S.P.S.T		-
SEQ.	IT.	DESCRIPTION		PM

graph TD
    A["ON/OFF/COOL DOWN"] --> B["X"]
    B --> C["POWER ON"]
    C --> D["HEATING"]
    D --> E["TEMP. CONTROL"]
    E --> F["TIMER"]
    F --> G["BUZZ"]
    G --> H["GND."]
    H --> I["R"]
    I --> J["1A"]
    I --> K["2A"]
    I --> L["2B"]
    M["MALE CONNECTOR (SHORT)"] --> N["1-12"]
    N --> O["C-1"]
    P["A"] --> Q["LIGHTS"]
    Q --> R["3-6"]
    R --> S["F"]
    T["E"] --> U["59"]
    U --> V["30"]
    V --> W["28"]
    W --> X["35"]
    X --> Y["40"]
    Y --> Z["41"]
    Z --> AA["42"]
    AA --> AB["43"]
    AB --> AC["44"]
    AC --> AD["45"]
    AD --> AE["46"]
    AE --> AF["47"]
    AF --> AG["48"]
    AG --> AH["49"]
    AH --> AI["50"]
    AI --> AJ["51"]
    AJ --> AK["52"]
    AK --> AL["53"]
    AL --> AM["54"]
    AM --> AN["55"]
    AN --> AO["56"]
    AO --> AP["57"]
    AP --> AQ["58"]
    AQ --> AR["59"]
    AR --> AS["60"]
    AS --> AT["61"]
    AT --> AU["62"]
    AU --> AV["63"]
    AV --> AW["64"]
    AW --> AX["65"]
    AX --> AY["GND."]
    AZ["R"] --> BA["1A"]
    BB["R"] --> BC["2A"]

PAGE 1 OF 2
(SEE 6973) 6972

VC4ED, VC6ED with Solid State Temperature Control, 208-240V

HEC5 & X, VC4ED & 6, WKED & X 208-240V
DERIVED FROM 426666

AI4892

VC4ED, VC6ED with Solid State Temperature Control, 208-240V - STARTING AT SERIAL NUMBER 481916864

Fig. 92

VC4ED & VC6ED 480V.

USE FIELD WIRE SUITABLE FOR 90°C.

426669-1 REV. D SEE WIRING DIAGRAM 426668 (6974, 6975)

6965

VC4ED, VC6ED with Solid State Temperature Control, 480V

9	AB	WIRE NUT BLUE	-
1	Z	TRANSFORMER 1KVA 480-240 V.	-
2	Y	LAMP ASSEMBLY 120V, 40V.	-
1	X	SWITCH, TOGGLE D.P.D.T. (CD)	-
1	V	MOTOR 1/3 HP, 2 SPEED G.E.	-
2	T	CONTACTOR 40A 3 POLE	-
1	S	TERMINAL BLOCK 3 POLE	-
2	R	FUSE & HOLDER 15A HOLDERS FUSE
1	P	PROBE, THERMISTOR	-
6	L	ELEMENT, 2.0 KW. 480V.	-
1	K	LIMIT CONTROL 550F	-
2	J	BLOCK/PORCELIAN ASSEMBLY	-
1	H	SWITCH, LIMIT (DOOR)	-
1	G	BUZZER 230 VOLT	-
1	F	TIMER, 230 VOLT : -HR, 60 HZ.5-HR, 60 HZ.
1	E	TEMP. CONTROL 'G-5'	-
1	D	FAN, COOLING 230 V.	-
1	C	LIGHT, "POWER ON", "HEATING" 250V.	-
1	B	SWITCH, TOGGLE D.P.D.T	-
1	A	SWITCH, TOGGLE S.P.S.T	-
REQ.	F:	DESCRIPTION	PM.

graph TD
    A["ON/OFF/COOL DOWN"] --> B["X"]
    B --> C["POWER ON HEATING"]
    C --> D["TEMP. CONTROL"]
    D --> E["TIMER"]
    E --> F["LIGHTS"]
    F --> G["BUZZ"]
    G --> H["TIME"]
    H --> I["SPEED"]
    I --> J["MINI"]
    J --> K["MINI"]
    K --> L["MINI"]
    L --> M["MINI"]
    M --> N["MINI"]
    N --> O["MINI"]
    O --> P["MINI"]
    P --> Q["MINI"]
    Q --> R["MINI"]
    R --> S["MINI"]
    S --> T["MINI"]
    T --> U["MINI"]
    U --> V["MINI"]
    V --> W["MINI"]
    W --> X["MINI"]
    X --> Y["MINI"]
    Y --> Z["MINI"]
    Z --> AA["MINI"]
    AA --> AB["MINI"]
    AB --> AC["MINI"]
    AC --> AD["MINI"]
    AD --> AE["MINI"]
    AE --> AF["MINI"]
    AF --> AG["MINI"]
    AG --> AH["MINI"]
    AH --> AI["MINI"]
    AI --> AJ["MINI"]
    AJ --> AK["MINI"]
    AK --> AL["MINI"]
    AL --> AM["MINI"]
    AM --> AN["MINI"]
    AN --> AO["MINI"]
    AO --> AP["MINI"]
    AP --> AQ["MINI"]
    AQ --> AR["MINI"]
    AR --> AS["MINI"]
    AS --> AT["MINI"]
    AT --> AU["MINI"]
    AU --> AV["MINI"]
    AV --> AW["MINI"]
    AW --> AX["MINI"]
    AX --> AY["MINI"]
    AY --> AZ["MINI"]
    AZ --> BA["MINI"]
    BA --> BB["MINI"]
    BB --> BC["MINI"]
    BC --> BD["MINI"]
    BD --> BE["MINI"]
    BE --> BF["MINI"]
    BF --> BG["MINI"]
    BG --> BH["MINI"]
    BH --> BI["MINI"]
    BI --> BJ["MINI"]
    BJ --> BK["MINI"]
    BK --> BL["MINI"]
    BL --> BM["MINI"]
    BM --> BN["MINI"]
    BN --> BO["MINI"]
    BO --> BP["MINI"]
    BP --> BQ["MINI"]
    BQ --> BR["MINI"]
    BR --> BS["MINI"]
    BS --> BT["MINI"]
    BT --> BU["MINI"]
    BU --> BV["MINI"]
    BV --> BW["MINI"]
    BW --> BX["MINI"]
    BX --> BY["MINI"]
    BY --> BZ["MINI"]

VC4ED, VC6ED with Solid State Temperature Control, 480V

Fig. 95

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard)

9	AB	WIRE NUT BLUE	-
2	Y	LAMP ASSEMBLY 120V. 40V.	-
1	V	MOTOR 1/3 HP. 2 SPEED G.E.	-
2	T	CONTACTOR 40A 3 POLE	-
1	S	TERMINAL BLOCK 3 POLE	-
2	R	FUSE & HOLDER 15A
1	P	TRANSFORMER, 240/24 40VA	-
6	L	ELEMENT, 2.0 KW 208 VOLT240 VOLT
1	K	LIMIT CONTROL 550F	-
1	J	BLOCK,PORCELIAN ASSEMBLY	-
1	H	SWITCH, LIMIT (ODOR)	-
1	G	ALARM 12 V. DC	-
2	F	RELAY, SOLID STATE 50A	-
1	E	FAN, COOLING 230 V.	-
1	D1	PROBE, THERMOCOUPLE	-
1	D	CONTROLLER WATLOW 734	-
1	B	SWITCH, OVEN LIGHT	-
1	A	SWITCH, MAIN POWER D.P.D.T. CENT.DEF-
80A	IT.	DESCRIPTION	70A

VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard)

Fig. 98

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard)

9	AB	WIRE NJT BLUE	-
1	Z	TRANSFORMER IKVA 400-240 V.	-
2	Y	LAMP ASSEMBLY 120V 40V.	-
1	V	MOTOR 1/3 HP 2 SPEED GE.	-
2	T	CONTACTOR 40A 3 POLE	-
1	S	TERMINAL BLOCK 3 POLE	-
2	R	FUSE & HOLDER ISAHOLDER
		FUSE
1	P	TRANSFORMER, 240/24 40VA	-
6	L	ELEMENT, 2.0 KV. 400V.	-
1	K	LIMIT CONTROL 550F	-
2	J	BLOCK.PORCELIAN ASSEMBLY	-
1	H	SWITCH, LIMIT (DOOR)	-
1	G	ALARM 12 V. DC	-
2	F	RELAY, SOLIO STATE 50A	-
1	E	FAN, COOLING 230 V.	-
1	DI	PROPE, THERNOCOUPLE	-
1	D	CONTROLLER VATLOW 734	-
1	B	SWITCH, OVEN LIGHT	-
1	A	SWITCH, MAIN POWER D.P.D.T. CENT.OF	F-
REQ.	IT.	DESCRIPTION	PINL

VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard)

Fig. 101

VC-WK-HEC 480V Wire Diagram

Wire Color Legend
— AC Line 1
— AC Line 2
— AC Line 3
240 VAC
Chasis Ground

UNIT	TOTAL KWH CONN.	T/PHASE LOAD KW/PHASE
		X-Y	Y-Z	X-Z
SINGLE	12.5	4.0	4.0	4.5
STACKED	25	8.0	8.0	9.0
	NOMINAL AMPS PER LINE
	3 PHASE			1-PH
	480V			480V
	X	Y	Z	XZ
SINGLE	14.4	15.3	15.3	26
STACKED	25.8	30.5	30.6	52

graph TD
    A["MOTOR 2 SPEED"] --> B["GND"]
    B --> C["COM"]
    C --> D["LO"]
    C --> E["HI"]
    D --> F["S"]
    E --> F
    F --> G["T"]
    G --> H["X"]
    I["TOP LAMP"] --> J["10"]
    K["Bottom LAMP"] --> L["7"]
    M["Ground"] --> N["K"]

NOTE: ITEM AA 962413-G1 CONTAINS 2A, 9A, 46, 50, 51, 52, 53

1	AC	VC4E 480V WIRE SET
1	AB	VC4E ELEMENT WIRE SET
1	AA	VC5E WIRE SET
1	Y	VC5E ACTUATOR HARNESS ASSY
1	X	LIGHT GRND WIRE
1	W	DOOR SW HARNESS
1	V	FAN, COOLING
10	U	WIRE NUT BLUE
2	T	LAMP ASSEMBLY 240V. 40W.
1	S	MOTOR 1/2 HP. 2 SPEED FIR 240 V
2	R	CONTACTOR 40A 3 POLE
1	P	TERMINAL BLOCK 3 POLE
1	N	FUSE & HOLDER 15A
1	M	PROBE THERMISTOR
1	L	TRANSFORMER, 480V TO 240V
1	K	LCOE ELEMENT ASSY. 12KW
2	J	LIMIT CONTROL 550F
1	H	BLOCK,PORCELIAN ASSEMBLY
1	G	DOOR SWITCH
1	F	WIRE SET, LIMIT SWITCH
1	E	LCOE GENTLE BAKE WIRE HARNESS
1	D	SWITCH, TOGGLE S.P.S.T
1	C	ASSY, SWITCH BOARD
1	B	ASSY, TIMER BOARD
1	A	ASSY,TEMP, CONTROL BOARD - TEMP
REQ. IT.		DESCRIPTION

AI5716

VC4ED & 6 / HEC5 / WKED

FULL SIZE, ELECTRIC, 480 VOLT

DERIVED FROM 00-962507 Rev E

REFER TO SCHEMATIC 00-962502-1

VC-HEC-WK Wire Diagram

Fig. 102

Wire Color Legend

— AC Line 1

— AC Line 2

— AC Line 3

240 VAC

— Chasis Ground

1	AC	WIRE SET, LIMIT SWITCH
9	AB	WIRE NUT BLUE
2	Y	LAMP ASSEMBLY 240V. 40W.
1	X	SWITCH, TOGGLE D.P.D.T. (CO)
1	V	MOTOR 1/2 HP. 2 SPEED FIR 240 V
2	T	CONTACTOR 40A 3 POLE
1	S	TERMINAL BLOCK 3 POLE
3	R	FUSE & HOLDER 15A HOLDERS FUSE
1	P	PROBE,THERMISTOR
1	L	ELEMENT, 12.0 KW
1	K	LIMIT CONTROL 550F
2	J	BLOCK,PORCELIAN ASSEMBLY
1	H	SWITCH, LIMIT (DOOR)
1	G	BUZZER 230 VOLT
1	F	TIMER, 230 VOLT 1-HR 60HZ
1	E	TEMP. CONTROL - NCC
1	D	FAN, COOLING 230 V.
1	C1	LIGHT, "HEAT" 250 V.
1	C	LIGHT, "ON" 250 V.
1	B	SWITCH, TOGGLE D.P.D.T
1	A	SWITCH, TOGGLE S.P.S.T
REQ. IT.		DESCRIPTION

AI5715

VC4ED & 6 / HEC5 / WKED

(Electric Convection Oven)

DERIVED FROM 00-426668 Rev Q

REFER TO SCHEMATIC 00-426669-1

VC-WK-HEC 480V Wire Diagram

Fig. 103

AI5718

Fig. 104

AI5717
Fig. 105

TROUBLESHOOTING

WARNING

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 the test.

TROUBLESHOOTING

SYMPTOMS POSSIBLE CAUSES
Blower motor doesn't run with power switch in "ON" "COOL DOWN" or position.	1. Line voltage incorrect.2. Power switch (S1) malfunction.3. Fan speed switch (S3) malfunction.4. Interconnecting wiring malfunction.5. Motor inoperative.
Blower motor doesn't run with power switch "ON", but oven heats.	1. Door switch malfunction.2. Interconnecting wiring malfunction.3. Motor inoperative.
Blower motor doesn't run in "Cool Down", but runs ok in "ON" position.	1. Power switch (S1) malfunction.2. Fan speed switch (S3) malfunction.3. Interconnecting wiring malfunction.
Excessive or low heat in oven.	1. Line voltage incorrect.2. Heating element malfunction.3. Contactor malfunction.4. Convection Fan motor malfunction.5. Temperature probe malfunction or mechanical thermostat malfunction.6. Temperature control not calibrated.7. Temperature control malfunction.
Mechanical Timer inoperative or not functioning properly	1. Interconnecting wiring malfunction.2. Line voltage incorrect.3. Timer malfunction.
Component cooling Fan does not run.	1. Motor inoperable.2. Interconnecting wiring malfunction.
Uneven Cooking.	1. Convection Fan motor speed/direction.2. Air flow Baffles missing or damaged.3. Line voltage incorrect.4. Heating element(s) malfunction.5. Contactor malfunction.
Intermittent operation problems.	1. High ambient temperatures.2. Wiring connections loose.3. Cooling fan malfunction.
No power to oven controls.	1. Main circuit breaker OPEN.2. Control circuit fuses OPEN.3. Power switch (S1) inoperative.
No heat, convection fan motor runs.	1. High limit thermostat OPEN.2. Heating element malfunction.3. Contactor malfunction.4. Temperature control malfunction.
No power to temperature control.	1. Power switch (S1) in "Cool Down".2. Door or door switch open.
Door does not seal or shut properly	1. Doors out of adjustment.2. Door chain out of adjustment or broken (simultaneous doors).3. Door catch roller out of adjustment or broken (independent doors).4. Door seals damaged.

COMPUTER CONTROL MODELS ONLY

SYMPTOM POSSIBLE CAUSES
Oven does not heat.	1. High limit switch open.2. Temperature probe malfunction.3. Computer control malfunction.
High limit thermostat shutting OFF heat.	1. Temperature probe malfunction.2. Computer control malfunction.
Oven not hot enough.	1. Temperature probe malfunction.2. Computer control range high (rH1) setting to low.SeeSETUP MODEunder COMPUTER CONTROL.3. Computer control malfunction.
Blower motor doesn't run with power switch in "ON" or "COOL DOWN" position.	1. Line voltage incorrect.2. Power switch (S1) malfunction.3. Fan speed switch (S3) malfunction.4. Solid sate relay (SSR) malfunction. See SOLID_STATE RELAY TEST under COMPUTER CONTROL.5. Interconnecting wiring malfunction.6. Motor inoperative.7. Computer control malfunction. See COMPUTER_CONTROL OPERATIONAL TEST.

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). The exact error code displayed will depend on the priority assigned to the problem in the EPROM'S software. The lower the error code number, the higher the priority. If more than one problem occurs at the same time, the error code assigned to the higher priority problem will be displayed. Refer to the error code table below to solve the problem. If the lower priority problem still exists, the next error code will be displayed. When the condition causing the error is resolved, normal oven operation can resume.

NOTE: To check a "Setup Parameter" and its corresponding "Data Value", see SETUP MODE under COMPUTER CONTROL.

NOTE: If the cause of the error is not apparent, check for these conditions as they may also cause errors to occur: Electrical noise or a noise event, excess environmental moisture or temperature, or vibration.

CODE & PROBLEM PROBABLE CAUSE SOLUTION
Er01 - ROM checksum error Internal	ROM malfunction Cycle power
Er02 - RAM checksum error Internal	RAM malfunction Cycle power
Er03 - Ambient sensor error Ambient	temperature is below 32°F	Check ambient temperature at the control.
Er04 - Configuration error Microprocessor malfunction Cycle power
Er05 - EPROM error1	Power loss while storing data Cycle power
Er06 - Zone 1 A/D underflow error	Incorrect sensor typeMeasuring 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. 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.
Er10 - Stack overflow error Microprocessor malfunction		Cycle powerCheck sensor and connections for a reversed or open sensor
Er11 - Open sensor error Open sensor		Check the InP1 setup parameter. Verify it matches your sensor.Check sensor and connections for a reversed or open sensor
Er12 - Shorted sensor	Incorrect sensor typeMeasuring 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
^1 Should only see when a new EPROM is installed and powered for the first time.

NOTE: ITEM AA 962413-G1 CONTAINS

2A, 9A, 46, 50, 51, 52, 53

1	AC	VCHE 450V WIRE SET
1	AB	VCHE ELEMENT WIRE SET
1	AA	VCHE WIRE SET
1	Y	VCHE ACTUATOR HARNESS ASSY
1	X	LIGHT GRND WIRE
1	DO	DOOR SW HARNESS
1	V	FAN, COOLING
10	U	VIRE MUT BLUE
2	T	LAMP ASSEMBLY 240V 40V
1	S	MOTOR 1/2 HP 2 SPEED FIR 240 V
2	R	CONTACTOR 4DA 3 POLE
1	P	TERMINAL BLOCK 3 POLE
1	N	FUSE & HOLDER 15A
1	M	PROBE THERMISTOR
1	L	TRANSFORMER, 480V TO 240V
1	K	LCOE ELEMENT ASSY, 12KW
2	J	LIMIT CONTROL 550F
1	H	BLOCK,PORCELVAN ASSEMBLY
1	G	DOOR SWITCH
1	F	WIRE SET, LIMIT SWITCH
1	E	LCOE GENTLE BAKE WIRE HARNESS
1	D	SWITCH, TOGGLE S.P.S.T
1	C	ASSY, SWITCH BOARD
1	B	ASSY, TIMER BOARD
1	A	ASSY TEMP, CONTROL BOARD - TEMP
PERQ.	IT.	DESCRIPTION

VC4ED & 6 / HEC5 / WKED FULL SIZE ELECTRIC 480 VOLT

DERIVED FROM 00-062507. Rev

DERIVED FROM 00-902507 REV 1 REFER TO SCHEMATIC 00.06250

REFER TO SCHEMATIC 00-982502-1