Vulcan-Hart ML-126743 Service Manual Download Page 35 | Manualshive

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Mechanical
Temperature Control
KX thermostat . . . . . . . .

Regulates the oven cavity temperature by controlling 2CON to energize the heating
elements when the control calls for heat (VC4ES/6ES only).

Cooling Fan . . . . . . . . . .

Circulates cooler air from outside the oven to cool components in the control area.

Fuses . . . . . . . . . . . . . . . . .

Protect control circuit.

COMPONENT LOCATION

Fig. 51

VC4E & VC6E Series Full Size Electric Convection Ovens - ELECTRICAL OPERATION

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F25105 Rev. B (0217)

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Summary of Contents for ML-126743

Page 1: ...e necessary tools instruments and skills required to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Vulcan Servi...

Page 2: ...ALIBRATION 20 MECHANICAL KX THERMOSTAT CALIBRATION 22 SOLID STATE TEMPERATURE CONTROL TEST 23 TEMPERATURE PROBE TEST SOLID STATE CONTROL 24 HEATING ELEMENT TEST 25 BLOWER ADJUSTMENT 25 DOOR ADJUSTMENT...

Page 3: ...VC4E VC6E Series Full Size Electric Convection Ovens VULCAN 2017 Page 3 of 64 F25105 Rev B 0217...

Page 4: ...DATES SERVICE UPDATES VC4E VC6E February 2017 Updated Data Module SOLID STATE TEMPERATURE CONTROL CALIBRATION VC4E VC6E Series Full Size Electric Convection Ovens SERVICE UPDATES F25105 Rev B 0217 Pag...

Page 5: ...2 Stainless steel doors w o window standard 3 Stainless steel doors with window standard 4 In February 2001 this model was discontinued OPTIONS MODEL COOK TIMER ROAST HOLD VC4ES 4 5 Hour Dial N A VC4...

Page 6: ...CIRCUIT PROTECTION 2 208V 240V 480V 208V 240V 480V VC4ES VC4ED VC4EC VC6ES VC6ED VC6EC 12 5 35 33 15 45 40 20 NOTES 1 Amperage values in the table are nominal Tolerance is 5 10 2 Complied in accordanc...

Page 7: ...the right side which secure the control panel then pull the panel away from the oven Fig 3 NOTE If the oven has a mechanical KX type thermostat it must be removed from the control panel first before...

Page 8: ...isconnect 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...

Page 9: ...ERS AND PANELS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Disconnect the wire leads to the component...

Page 10: ...e probe must be removed at an angle 6 Reverse the procedure to install the replacement probe 7 Adjust the temperature control as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION in SERVICE P...

Page 11: ...cess to the left side panel and or the top panel is available see ALTERNATE ACCESS 6 Disconnect the lead wires from the element 7 Clean RTV residue from the mating surface inside the oven apply new hi...

Page 12: ...remove the panel Fig 14 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 positio...

Page 13: ...ation then replace rack guides and racks DOOR SWITCH Disconnect the electrical power to the machine and follow lockout tagout procedures There may be multiple circuits Be sure all circuits are disconn...

Page 14: ...edge if applicable of the door then remove the inner door panel and window assembly 4 Remove the screws securing the window tabs to the door bracket and lift the window assembly out from the door fram...

Page 15: ...the bottom bearing remove it from the door shaft or the lower sill opening 8 Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT and DOOR SWIT...

Page 16: ...w 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 27 A Door assembly parts are no...

Page 17: ...mostat 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 30 NOTE When installing probe guard the probe should not...

Page 18: ...s lens for the light being replaced then unscrew the bulb Fig 33 3 Replace bulb then reverse the procedure to install Lamp Assembly 1 Remove the lens and bulb 2 Remove the springs from the retaining t...

Page 19: ...to the component panel Rotate the tab so that the fan will clear and remove the fan Fig 35 4 Reverse the procedure to install the replacement fan and check for proper operation NOTE The fan must be i...

Page 20: ...operly 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 temperatur...

Page 21: ...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 m...

Page 22: ...erential 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 F or less the thermostat is functioning prope...

Page 23: ...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 procedu...

Page 24: ...e probe as outlined under TEMPERTURE PROBE TEST SOLID STATE CONTROL 1 If temperature probe is OK a Turn the power switch OFF Disconnect the electrical power to the machine and follow lockout tagout pr...

Page 25: ...move the lead wires from the heating element and check resistance ohms See Heating Elements Values table 3 Check for proper operation Heating Element Values VOLT KW PER ELEMENT AMPS PER ELEMENT LEAD O...

Page 26: ...o the vertical door seal If the doors are not positioned in this manner adjust the doors as described Fig 41 2 Remove the top front cover 3 Loosen the screws that secure the upper door bearings and re...

Page 27: ...plate fasteners Fig 43 3 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 ASSE...

Page 28: ...proper adjustment cannot be achieved add shims beneath the door strike Repeat step 6 thru this step NOTE DO NOT BEND THE DOOR STRIKE 7 Each oven door should open with a force of 8 to 25 pounds when pu...

Page 29: ...in assembly to factory setting if the conditions in step 2 are not met Fig 47 4 If right door does not lead the left door in closing A Loosen locknuts on both turnbuckles B Loosen left turnbuckle C Ti...

Page 30: ...ot 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...

Page 31: ...eed to step 3 to change the temperature 3 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 tem...

Page 32: ...ion Mode 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 para...

Page 33: ...control LEDs for a visual verification that all segments in the LED display and the internal LEDs are functioning 6 At the end of the test the control exits the calibration mode and returns to the Op...

Page 34: ...of the cycle If Roast Hold mode is selected when the Cook then hold time expires the oven heating stops and the oven enters Hold mode Once the oven cavity temperature drops to 150 F the heat comes ba...

Page 35: ...eating elements when the control calls for heat VC4ES 6ES only Cooling Fan Circulates cooler air from outside the oven to cool components in the control area Fuses Protect control circuit COMPONENT LO...

Page 36: ...VC4ES 6ES with Mechanical KX thermostat Plug Socket and Components VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 36 of 64...

Page 37: ...VC4ED 6ED with Solid State Control Plug Socket and Components VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 37 of 64 F25105 Rev B 0217...

Page 38: ...VC4EC 6EC Plug Socket and Components Roast Hold Standard VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 38 of 64...

Page 39: ...the doors are opened or the power switch S1 is turned to the OFF or COOL DOWN position SEQUENCE OF OPERATION VC4ED VC6ED with Solid State Temperature Control Refer to diagram 6964 for electrical seque...

Page 40: ...il is energized but heating elements are not powered C Component cooling fan energized D Power is supplied to 1 Cook timer terminal 1 If a time is dialed timer will operate and buzzer will sound when...

Page 41: ...oast 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 sp...

Page 42: ...with Solid State Temperature Control 208 240V Schematic VC4ED VC6ED with Solid State Temperature Control 208 240V Wiring Diagram VC4ED VC6ED with Solid State Temperature Control 480V Schematic VC4ED V...

Page 43: ...VC4ES VC6ES with Mechanical KX Controls 208 240V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 43 of 64 F25105 Rev B 0217...

Page 44: ...VC4ES VC6ES with Mechanical KX Control 208 240V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 44 of 64...

Page 45: ...Fig 57 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 45 of 64 F25105 Rev B 0217...

Page 46: ...VC4ES VC6ES with Mechanical KX Controls 480V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 46 of 64...

Page 47: ...VC4ES VC6ES with Mechanical KX Control 480V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 47 of 64 F25105 Rev B 0217...

Page 48: ...Fig 60 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 48 of 64...

Page 49: ...VC4ED VC6ED with Solid State Temperature Control 208 240V Schematic VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 49 of 64 F25105 Rev B 0217...

Page 50: ...VC4ED VC6ED with Solid State Temperature Control 208 240V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 50 of 64...

Page 51: ...Fig 63 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 51 of 64 F25105 Rev B 0217...

Page 52: ...VC4ED VC6ED with Solid State Temperature Control 480V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 52 of 64...

Page 53: ...VC4ED VC6ED with Solid State Temperature Control 480V VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 53 of 64 F25105 Rev B 0217...

Page 54: ...Fig 66 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 54 of 64...

Page 55: ...VC4EC VC6EC Computer Control 208 240V Roast Hold Standard VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 55 of 64 F25105 Rev B 0217...

Page 56: ...VC4EC VC6EC Computer Control 208 240V Roast Hold Standard VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 56 of 64...

Page 57: ...Fig 69 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 57 of 64 F25105 Rev B 0217...

Page 58: ...VC4EC VC6EC Computer Control 480V Roast Hold Standard VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 58 of 64...

Page 59: ...VC4EC VC6EC Computer Control 480V Roast Hold Standard VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION Page 59 of 64 F25105 Rev B 0217...

Page 60: ...Fig 72 VC4E VC6E Series Full Size Electric Convection Ovens ELECTRICAL OPERATION F25105 Rev B 0217 Page 60 of 64...

Page 61: ...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...

Page 62: ...oes 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 damag...

Page 63: ...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...

Page 64: ...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 I...

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