Vulcan-Hart SG4D service manual Computer Controller SG4C/SG6C, Operation Setup Mode, Probe Test

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COMPUTER CONTROLLER

(SG4C/SG6C)

Operation

Refer to the Installation & Operation Manual for specific operating instructions.

Setup Mode

Use the setup mode to verify that the control is configured to the factory settings which result in the proper operation of the oven. If the CAL1 parameter is other than zero, see Computer Control Calibration (SG4C/SG6C).

CAUTION: Changing the C_F, InP1, rL1 and rH1 parameters will default all menus.

1.Use this key sequence to access the setup mode: UP arrow, Rack 1, Temperature, Temperature, DOWN arrow, Rack 1.

1 1

PL-56075

2.Once in the setup mode the display will alternate between the parameter and programmed data.

A.To change data to the factory setting, use the arrow keys.

B.To select the next parameter, press the Rack 1 key.

C.After the last parameter and data are viewed, press the Rack 1 key to exit the setup mode and return to operations mode. The current set point temperature will be displayed.

D.If there are no key activations after 1 minute, the control will return to operation mode.

3.Listed are the parameters and data in the setup mode.

 

ALTERNATING ON DISPLAY

MENU

 

 

PARAMETER

DATA

 

 

 

 

Celsius_Fahrenheit

C_F

F

 

 

 

Guard Band

gb

4000

 

 

 

Temperature

tcnP

OFF

Compenstaion

 

 

 

 

 

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

Set point temperature is

and return to

displayed or if calling for heat,

operation mode.

dashes (----) are 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.

1.Temporarily disconnect the existing lead wires from the computer control and connect them to a good J-type thermocouple.

2.Turn the power switch to ON and set the temperature controller to 350°F.

A. If the oven reaches the set temperature and cycles with the temporary thermocouple, then the existing probe is malfunctioning.

3.Replace the temperature probe with the correct part and check for proper operation.

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Contents SG4 & SG6 Series Full Size GAS Convection Ovens VULCAN-HART Table of Contents Table of Contents General Component Location Removal and Replacement of PartsRight Side Panel Covers and PanelsTop Front Cover Bottom Front CoverSG4D/SG6D SG4C/SG6C Control Panel ComponentsComponent Panel Components SG4C/SG6C Temperature Probe Shown Temperature ProbeGAS Burners GAS Solenoid Valve GAS OrificeSpark Igniter and Flame Sense Ignition Control ModuleBlower and Motor Oven Doors and Bearings Door Window Roller Latch Assembly Independent DoorsDoor Catch Roller Assembly Independent Doors Door Switch Interior Lights Lamp AssemblyHigh Limit Thermostat Cooling FAN Fan Installation TipsTest Steps Service Procedures and AdjustmentsSolid State Temperature Controller Test SG4D/SG6D Calibration Steps Solid State Temperature Control Calibration SG4D/SG6DTemp F Ohms Temperature Probe Test SG4D/SG6DProbe Test Operation Setup ModeComputer Controller SG4C/SG6C Solid State Relay Test Computer Control Calibration SG4C/SG6CGAS Pressure Adjustment Verification of Spark AT Ignitor Door Switch AdjustmentFlame Current Measurement Blower AdjustmentDoor Strike Adjustment Independent Doors Door AdjustmentDoor Catch Roller Adjustment Component Description Electrical OperationPlug, Socket and Components SG4D/SG6D Front ViewPlug, Socket and Components SG4C/SG6C Control Panel Component PanelFront View Cook Cycle SG4D/SG6D with Solid State Temperature ControllerSequence of Operations Cool Down Cycle Solid State Temperature Controller Timer CycleNormal Cook Cycle SG4C/SG6C with Computer ControllerPage Roast and Hold Cycle Temperature and Time Cycle Normal CookingWiring Diagrams 426574 Rev. C Thermostat SchematicsGAS Convection Oven SG4 with Watlow 734 Control Symptoms Possible Causes TroubleshootingSymptoms Possible Causes Computer Control Models only Symptom Possible CausesError Codes Probable Cause Solution Problem