Manuals / Vulcan-Hart / Kitchen Appliance / Convection Oven

Vulcan-Hart VC6EC, VCIEC, VC6ED, VC4ES, VC4ED Troubleshooting, All Models, Symptoms, Possible Causes

Models: VC6ES VC4ED VC4ES VC6EC VC6ED VCIEC

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TROUBLESHOOTING

FULL SIZE ELECTRIC CONVECTION OVENS - TROUBLESHOOTING

TROUBLESHOOTING

WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

ALL MODELS

SYMPTOMS		POSSIBLE CAUSES

Blower motor doesn’t run with power switch in “ON”	1.	Line voltage incorrect.
“COOL DOWN” or position.	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	1.	Door switch malfunction.
oven heats.	2.	Interconnecting wiring malfunction.
	3.	Motor inoperative.

Blower motor doesn’t run in “Cool Down”, but runs ok	1.	Power switch (S1) malfunction.
in “ON” position.	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	1.	Interconnecting wiring malfunction.
properly.	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.

F25105 (December 2001)		Page 56 of 60

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Vulcan-Hart VC6EC, VCIEC, VC6ED, VC4ES, VC4ED, VC6ES service manual Troubleshooting, All Models, Symptoms, Possible Causes

Contents

MODEL NOTICESERVICE MANUAL VC4E & VC6E SERIESTABLE OF CONTENTS FULL SIZE ELECTRIC CONVECTION OVENS VulcanPage 3 of F25105 DecemberINSTALLATION CLEANINGFEATURES TEMPERATURESPECIFICATIONS AMPERAGE - 3 PHASE/ 60HZPOWER AMPERAGE - 1 PHASE/ 60HZREMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELSTop Front Cover Bottom Front CoverRemovable Components CONTROL PANEL COMPONENTSLeft Side Panel Removable Components TEMPERATURE PROBE SOLID STATE CONTROLCOMPONENT PANEL COMPONENTS Front Access HEATING ELEMENTSLEFT SIDE ELEMENTS SHOWN Alternate AccessBLOWER AND MOTOR DOOR SWITCH DOOR WINDOW OVEN DOORS AND BEARINGS INDEPENDENT DOORSAssembly Removal OVEN DOORS SIMULTANEOUS DOORSMECHANICAL KX THERMOSTAT DOOR CATCH ROLLER ASSEMBLY INDEPENDENT DOORSDisassembly Lamp Assembly HIGH LIMIT THERMOSTATINTERIOR LIGHTS LampCOOLING FAN SERVICE PROCEDURES AND ADJUSTMENTS SOLID STATE TEMPERATURE CONTROL CALIBRATIONMECHANICAL KX THERMOSTAT CALIBRATION SOLID STATE TEMPERATURE CONTROL TEST TEMPERATURE PROBE TEST HEATING ELEMENT TESTSOLID STATE CONTROL TEMP FBLOWER ADJUSTMENT DOOR ADJUSTMENT DOOR CATCH ROLLER ADJUSTMENT INDEPENDENT DOORSDOOR SWITCH ADJUSTMENT DOOR CHAIN ADJUSTMENT SIMULTANEOUS DOORSProcedure IntroductionOperation Setup modeCOMPUTER CONTROL ALTERNATING ON MENUDISPLAY PARAMETERCOMPUTER CONTROL TEMPERATURE CALIBRATION COMPUTER CONTROL OPERATIONAL TESTCODE ALTERNATING ONMENU DISPLAYRestore Factory Settings Power Switch S1 Oven Light Switch S2Fan Speed Switch S3 Alarm/BuzzerMechanical Temperature Control COMPONENT LOCATIONPage 31 of F25105 DecemberF25105 December Page 32 ofPage 33 of F25105 DecemberVC4ED, VC6ED with Solid State Temperature Control SEQUENCE OF OPERATIONCook Cycle VC4ES, VC6ES with Mechanical KX ThermostatTimer Cycle, Cooking KX Thermostat or Solid State ControlCool Down Cycle VC4EC, VC6EC Computer ControlCool Down Cycle Temperature and Time Cycle CookingCook and Hold Cycle SCHEMATICS VC4ES, VC6ES with Mechanical KX Controls,Page 38 of VC4ES, VC6ES with Mechanical KX Controls,F25105 December Page 39 of F25105 DecemberF25105 December Page 40 ofPage 41 of F25105 DecemberF25105 December Page 42 ofF25105 December THIS PAGE PURPOSELY LEFT BLANKPage 43 of WIRING DIAGRAMS VC4ES, VC6ES with Mechanical KX Control,Page 45 of F25105 DecemberPage 46 of VC4ES, VC6ES with Mechanical KX Control,F25105 December Page 47 of F25105 DecemberF25105 December Page 48 ofPage 49 of F25105 DecemberF25105 December Page 50 ofPage 51 of F25105 DecemberF25105 December Page 52 ofPage 53 of F25105 DecemberF25105 December Page 54 ofPage 55 of F25105 DecemberTROUBLESHOOTING SYMPTOMSALL MODELS POSSIBLE CAUSESSYMPTOM COMPUTER CONTROL MODELS ONLYSYMPTOMS POSSIBLE CAUSESError Codes CODE & PROBLEMSOLUTION PROBABLE CAUSEF25105 December N O T E SPage 59 of CONDENSED SPARE PARTS LIST PART NUMBERDESCRIPTION VC4E & VC6E SERIES OVENS