Vulcan-Hart VC6ED, VCIEC, VC6EC, VC4ES, VC4ED Solid State Temperature Control Test, Troubleshooting

Page 19

FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS

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

10.If the above adjustment cannot be obtained:

A.Turn the power switch OFF.

WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

B.Install a replacement thermostat and check calibration.

SOLID STATE TEMPERATURE

CONTROL TEST

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".

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

NOTE: Oven temperature must be below 450°.

3.Set the temperature control to the maximum setting.

4.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.

5.Turn the power switch to ON.

A.If correct, proceed to step 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 relay and 6 & 10 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)".

8.Set the temperature control to the minimum setting.

NOTE: Oven temperature must be above 300°F.

9.Check for zero (0) volts AC across terminals 6 & 10 (208-240VAC) 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 AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

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

6.Check for proper voltage across terminals 8 & 10 (208-240VAC) for power to the control.

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F25105 (December 2001)

 

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Contents VC4ED Shown VC4E & VC6E SeriesTable of Contents Full Size Electric Convection Ovens General VC4ES VC4ED VC4EC SpecificationsVC6ES VC6ED VC6EC Covers and Panels Removal and Replacement of PartsCovers and Panels Control Panel ComponentsLeft Side Panel Removable ComponentsComponent Panel Components Temperature Probe Solid State ControlHeating Elements Front AccessBlower and Motor Alternate AccessLeft Side Elements Shown Service Procedures and Adjustments Door SwitchOven Doors and Bearings Independent Doors Door WindowOven Doors Simultaneous Doors Assembly RemovalMechanical KX Thermostat Door Catch Roller Assembly Independent DoorsDisassembly Assembly RemovalLamp Lamp AssemblyHigh Limit Thermostat Interior LightsCooling FAN Solid State Temperature Control Calibration Service Procedures and AdjustmentsMechanical KX Thermostat Calibration Troubleshooting Solid State Temperature Control TestTemperature Probe Test Solid State Control Amps PER Voltage KW PER Element Ohms PER Lead Temp F Ohms208 240 480 Blower Adjustment Door Catch Roller Adjustment Independent Doors Door AdjustmentProcedure Door Switch AdjustmentIntroduction Computer Control Setup modeOperation Solid State Relay Test Alternating onMenu Display Parameter Data Probe TestComputer Control Operational Test Computer Control Temperature CalibrationHEY CalyKEY Code Restore Factory Settings 1CON & 2CON Electrical OperationComponent Function SSR1 & SSR2Component 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 VC4ES, VC6ES with Mechanical KX Thermostat VC4ED, VC6ED with Solid State Temperature ControlSequence of Operation Cook CycleCool Down Cycle KX Thermostat or Solid State Control Timer Cycle, Cooking KX Thermostat or Solid State ControlVC4EC, VC6EC Computer Control Cook and Hold Cycle Temperature and Time Cycle CookingCool 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 Full Size Electric Convection Ovens Troubleshooting TroubleshootingALL Models Control Operational Test Computer Control Models onlyCode & Problem Probable Cause Solution Error CodesComputer Control T E S Part Number Description VC4ES VC4ED VC4EC VC6ES VC6ED VC6EC Condensed Spare Parts List
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