Vulcan-Hart VC4EC Page 31 Service Manual Download | Manualshive

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FULL SIZE ELECTRIC CONVECTION OVENS - ELECTRICAL OPERATION

F25105 (Rev. A, October 2007)

Page 31 of 60

VC4ES/6ES with Mechanical KX thermostat - Plug, Socket and Components

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Summary of Contents for VC4EC

Page 1: ...a Vulcan Service School for this product you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perfo...

Page 2: ...neous Doors 13 Roller Latch Assembly 14 Door Catch Roller Assembly Independent Doors 14 Mechanical KX Thermostat 15 High Limit Thermostat 15 Interior Lights 16 Cooling Fan 16 SERVICE PROCEDURES AND AD...

Page 3: ...with Mechanical KX Controls 208 240V 37 VC4ES VC6ES with Mechanical KX Controls 480V 38 VC4ED VC6ED with Solid State Temperature Control 208 240V 39 VC4ED VC6ED with Solid State Temperature Control 4...

Page 4: ...ultaneous doors are optional with or w o window 2 Stainless steel doors w o window standard 3 Stainless steel doors with window standard 4 In February 2001 this model was discontinued INSTALLATION Ref...

Page 5: ...40 20 NOTES 1 Amperage values in the table are nominal Tolerance is 5 10 2 Complied in accordance with National Electric Code ANSI NFPA 70 latest edition MODEL TOTAL POWER KW AMPERAGE 1 PHASE 60HZ PER...

Page 6: ...all Control Panel 1 Remove three 3 screws on the right side which secure the control panel then pull the panel away from the oven NOTE If the oven has a mechanical KX type thermostat it must be remove...

Page 7: ...control panel 2 Remove the seven screws securing the left side panel 3 Pull the left side panel out at the bottom then down to remove 4 Reverse the procedure to install CONTROL PANEL COMPONENTS Remov...

Page 8: ...ect the wire leads to the component being replaced 3 Remove the component 4 Reverse the procedure to install the replacement component and check oven for proper operation TEMPERATURE PROBE SOLID STATE...

Page 9: ...e 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 rac...

Page 10: ...he 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 Remove the left side p...

Page 11: ...e 9 Position the replacement motor on the motor mounting plate and install mounting bolts and washers Hand tighten mounting bolts only 10 Reconnect lead wires at the motor replace conduit and junction...

Page 12: ...dge of the door 3 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 doo...

Page 13: ...ccessible 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 C If replacing the bottom be...

Page 14: ...e 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 sp...

Page 15: ...rd the probe should not extend beyond the guard 4 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 w...

Page 16: ...lace by the retaining tabs 7 Install the light bulb and lens 8 Check for proper operation COOLING FAN 1 Remove the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not...

Page 17: ...7 2 If the differential is more than 20 F a Check the temperature probe as outlined under TEMPERATURE PROBE TEST SOLID STATE CONTROL b If the probe is functioning properly then temperature control is...

Page 18: ...fferential is 30 F or less the thermostat is functioning properly a Proceed to step 7 2 If the differential is more than 30 EF the thermostat is malfunctioning a Install a replacement thermostat and c...

Page 19: ...tep 7 B If incorrect problem is not with the temperature control See TROUBLESHOOTING 7 Check relay voltages on the board A For 208 240VAC controls check across terminals 7 10 for input to the internal...

Page 20: ...1 332 475 266 340 1 041 Resistance in ohms 10 HEATING ELEMENT TEST The following steps require power to be applied to the unit during the test Use extreme caution at all times 1 Turn the power switch...

Page 21: ...lts 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 an...

Page 22: ...made after 8 12 07 and serial number starting with 54 made after 8 26 07 1 Remove top front cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS 2 Open the doors and inspect do...

Page 23: ...th 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 neces...

Page 24: ...s 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 a...

Page 25: ...ess 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...

Page 26: ...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 7 Turn the power switch OFF 8 Replace the SSR an...

Page 27: ...Restore Factory Settings option is available The calibration mode contains several adjustable parameters that must not be changed For the CALY Calibration Parameter the default data option selected mu...

Page 28: ...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 C Replace the computer control a...

Page 29: ...by removing power from the heating circuit Auto resets at 500 F Computer Control Monitors temperature sensor and regulates the oven cavity temperature by controlling 2CON to energize the heating eleme...

Page 30: ...ol board The probe is an RTD resistance temperature detector of the Thermistor type As temperature increases the resistance value decreases On oven models using the computer control the probe is a J t...

Page 31: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 31 of 60 VC4ES 6ES with Mechanical KX thermostat Plug Socket and Components...

Page 32: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 32 of 60 VC4ED 6ED with Solid State Control Plug Socket and Components...

Page 33: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 33 of 60 VC4EC 6EC Plug Socket and Components Cook Hold Standard...

Page 34: ...on VC4ED VC6ED with Solid State Temperature Control Schematic diagram 6534 will be used to explain the electrical sequence of operation Cook Cycle 1 Conditions A Oven connected to correct voltage and...

Page 35: ...OFF or ON position VC4EC VC6EC Computer Control Schematic diagram 6536 will be used to explain the electrical sequence of operation or both the Cook cycle and the Cook and Hold cycle Cook Cycle 1 Cond...

Page 36: ...m 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 activ...

Page 37: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 37 of 60 SCHEMATICS VC4ES VC6ES with Mechanical KX Controls 208 240V...

Page 38: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 38 of 60 VC4ES VC6ES with Mechanical KX Controls 480V...

Page 39: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 39 of 60 VC4ED VC6ED with Solid State Temperature Control 208 240V...

Page 40: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 40 of 60 VC4ED VC6ED with Solid State Temperature Control 480V...

Page 41: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 41 of 60 VC4EC VC6EC Computer Control 208 240V Roast Hold Standard...

Page 42: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 42 of 60 VC4EC VC6EC Computer Control 480V Roast Hold Standard...

Page 43: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 43 of 60 THIS PAGE PURPOSELY LEFT BLANK...

Page 44: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 44 of 60 WIRING DIAGRAMS VC4ES VC6ES with Mechanical KX Control 208 240V...

Page 45: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 45 of 60...

Page 46: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 46 of 60 VC4ES VC6ES with Mechanical KX Control 480V...

Page 47: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 47 of 60...

Page 48: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 48 of 60 VC4ED VC6ED with Solid State Temperature Control 208 240V...

Page 49: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 49 of 60...

Page 50: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 50 of 60 VC4ED VC6ED with Solid State Temperature Control 480V...

Page 51: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 51 of 60...

Page 52: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 52 of 60 VC4EC VC6EC Computer Control 208 240V Roast Hold Standard...

Page 53: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 53 of 60...

Page 54: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 54 of 60 VC4EC VC6EC Computer Control 480V Roast Hold Standard...

Page 55: ...FULL SIZE ELECTRIC CONVECTION OVENS ELECTRICAL OPERATION F25105 Rev A October 2007 Page 55 of 60...

Page 56: ...otor 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...

Page 57: ...justment 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 co...

Page 58: ...2 RAM checksum error Internal RAM malfunction Cycle power Er03 Ambient sensor error Ambient temperature is below 32EF Check ambient temperature at the control Er04 Configuration error Microprocessor m...

Page 59: ...FULL SIZE ELECTRIC CONVECTION OVENS TROUBLESHOOTING F25105 Rev A October 2007 Page 59 of 60 N O T E S...

Page 60: ...FULL SIZE ELECTRIC CONVECTION OVENS F25105 Rev A October 2007 Printed in U S A...

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