Vulcan-Hart VC6ED Alternating on, Menu Display Parameter Data, Probe Test, Solid State Relay Test

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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS

 

ALTERNATING ON

MENU

DISPLAY

 

 

PARAMETER

 

DATA

 

 

 

 

Celsius_Fahrenheit

C_F

 

F

 

 

 

 

Guard Band

gb

 

4000

 

 

 

 

Temperature

tcnP

 

OFF

Compensation

 

 

 

 

 

 

 

 

Input Type 1

InP1

 

J

 

 

 

 

Range Low 1

rL1

 

75

 

 

 

 

Range High 1

rH1

 

500

 

 

 

 

Hysteresis

HYS1

 

3

 

 

 

 

Calibration Offset

CAL1

 

0

 

 

 

Exit Setup Mode and

set point temperature is

displayed or if call for

return to Operation

heat, dashes (----)

 

Mode.

 

displayed.

 

 

 

 

 

 

 

Probe Test

If the oven is not 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 lead wires from the computer control and connect the lead wires from a known good "J" type thermocouple. Secure the sensing end of the thermocouple near the probe.

Turn the power switch ON and set the dial to 350°F.

If the oven reaches the set temperature and cycles with the temporary thermocouple, then the existing probe is malfunctioning. Replace temperature probe with the correct part and check for proper operation.

Solid State Relay Test

The solid state relays "SSR1 or SSR2" supply power to the blower motor "high" or "low" fan speed terminals when the SSR is energized by the output voltage from the computer.

To test solid state relay "SSR1" (high fan speed), the computer control should be in the "Normal Cooking Mode". To test solid state relay "SSR2" (low fan speed), the computer control should be in the "Cook & Hold Mode".

1.Remove the right side panel as outlined under

"COVERS AND PANELS".

2.Turn the power switch ON.

A.If the blower motor comes on, the SSR is functioning properly.

B.If the blower motor does not come on, proceed to step 3.

3.Check for +5 VDC on the input side of SSR (terminals 3 & 4).

A.If +5 VDC is present, continue to step 4.

B.If no voltage is present, computer control is not functioning properly.

4.Check for proper input voltage on the load side of SSR terminal 1 and the power connection on the other side of the supply.

A.On 208 & 240 volt ovens, the supply connection is on the terminal block (L2 for single phase, L3 for three phase).

The measured voltage should be identical to the supply.

B.On 480 volt ovens, the supply connection is on the secondary side of the 480V transformer, terminal X4 (wire # 79).

The measured voltage should be 240 volts.

5.If input voltage is correct on the load side of SSR terminal 1, proceed to step 6.

A.If input voltage is not correct, find the source of the problem.

6.Check output voltage on the load side of SSR terminal 2.

Page 25 of 60

 

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 PartsLeft Side Panel Control Panel ComponentsRemovable Components Covers and PanelsComponent 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 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 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 Menu Display Parameter Data Alternating onProbe Test Solid State Relay TestComputer Control Operational Test Computer Control Temperature CalibrationHEY CalyKEY 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 ThermostatCool 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