Vulcan-Hart VC4ES, VCIEC, VC6ED, VC6EC, VC4ED Computer Control Models only, Control Operational Test

Page 57

FULL SIZE ELECTRIC CONVECTION OVENS - TROUBLESHOOTING

SYMPTOMS		POSSIBLE CAUSES

No power to oven controls.	1.	Main circuit breaker OPEN.
	2.	Control circuit fuses OPEN.
	3.	Power switch (S1) inoperative.
	4.	Transformer (T2) inoperative (480V only).

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. See
		"SETUP MODE" under "COMPUTER CONTROL)".
	3.	Computer control malfunction.

Blower motor doesn’t run with power	1.	Line voltage incorrect.
switch in “ON” or "COOL DOWN” position.	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".

Page 57 of 60		F25105 (December 2001)

Image 57

Contents VC4ED Shown VC4E & VC6E SeriesTable of Contents Full Size Electric Convection Ovens General Specifications VC4ES VC4ED VC4ECVC6ES VC6ED VC6EC Covers and Panels Removal and Replacement of PartsLeft Side Panel Control Panel ComponentsRemovable Components Covers and PanelsComponent Panel Components Temperature Probe Solid State ControlHeating Elements Front AccessAlternate Access Blower and MotorLeft Side Elements Shown Service Procedures and Adjustments Door SwitchOven Doors and Bearings Independent Doors Door WindowOven Doors Simultaneous Doors Assembly RemovalDisassembly Door Catch Roller Assembly Independent DoorsAssembly Removal Mechanical KX ThermostatHigh Limit Thermostat Lamp AssemblyInterior Lights LampCooling FAN Solid State Temperature Control Calibration Service Procedures and AdjustmentsMechanical KX Thermostat Calibration Solid State Temperature Control Test TroubleshootingTemperature Probe Test Solid State Control Temp F Ohms Amps PER Voltage KW PER Element Ohms PER Lead208 240 480 Blower Adjustment Door Catch Roller Adjustment Independent Doors Door AdjustmentDoor Switch Adjustment ProcedureIntroduction Setup mode Computer ControlOperation Menu Display Parameter Data Alternating onProbe Test Solid State Relay TestComputer Control Operational Test Computer Control Temperature CalibrationCaly HEYKEY Code Restore Factory Settings Component Function Electrical OperationSSR1 & SSR2 1CON & 2CONComponent Location Mechanical Temperature ControlFull Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation VC4EC/6EC Plug, Socket and Components Cook & Hold Standard Sequence of Operation VC4ED, VC6ED with Solid State Temperature ControlCook Cycle VC4ES, VC6ES with Mechanical KX ThermostatTimer Cycle, Cooking KX Thermostat or Solid State Control Cool Down Cycle KX Thermostat or Solid State ControlVC4EC, VC6EC Computer Control Temperature and Time Cycle Cooking Cook and Hold CycleCool Down Cycle VC4ES, VC6ES with Mechanical KX Controls SchematicsVC4ES, VC6ES with Mechanical KX Controls VC4ED, VC6ED with Solid State Temperature Control VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation VC4EC, VC6EC Computer Control, 480V Roast & Hold Standard This page Purposely Left Blank VC4ES, VC6ES with Mechanical KX Control Wiring DiagramsFull Size Electric Convection Ovens Electrical Operation VC4ES, VC6ES with Mechanical KX Control Full Size Electric Convection Ovens Electrical Operation VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation VC4EC, VC6EC Computer Control, 480V Roast & Hold Standard Full Size Electric Convection Ovens Electrical Operation Troubleshooting Full Size Electric Convection Ovens TroubleshootingALL Models Control Operational Test Computer Control Models onlyError Codes Code & Problem Probable Cause SolutionComputer Control T E S Part Number Description VC4ES VC4ED VC4EC VC6ES VC6ED VC6EC Condensed Spare Parts List