Wolf WKGCX 126625 Computer Control Calibration WKGC/WKGCX, Probe Test, Solid State Relay Test

FULL SIZE GAS 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

1.Set the control to 350EF.

2.Access the back of the control panel to disconnect the probe lead wires.

3.Install a jumper wire across the probe terminals. This will simulate room temperature.

A.If the heat light comes on and the actual temperature is room temperature, replace the probe.

B.If the heat light does not come on or the actual temperature is not room temperature, replace the control.

Solid State Relay Test

1.Remove the right side panel as outlined under

COVERS AND PANELS.

2.Set the temperature to 350°F or high enough to keep the heat ON for several minutes.

3.Check for +5 VDC on 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 120 VAC at load side of SSR (terminals 1 & 2).

A.If no voltage is present, solid state relay is not functioning properly.

1)Replace the SSR and check for proper operation.

B.If 120 VAC is present, component is functioning properly.

5.Re-assemble oven and check for proper operation.

COMPUTER CONTROL

CALIBRATION

(WKGC/WKGCX)

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

2.Set the ON-OFF-OVEN COOL switch to ON.

A.If the set point temperature is 350°F, proceed to step 4.

B.If the set point temperature is other than 350°F, proceed to step 3 to change the temperature.

3.Press the set key then temperature key to enter the temperature set mode.

A.The display will alternate between the term StPt (set point) and the current oven temperature setting.

B.Press the up or down arrow keys to make the proper selection.

C.Press the set key again to save the change and exit the temperature set mode.

4.Allow the oven temperature to stabilize (normally 3 cycles).

5.Compare the controls set point temperature to the thermocouple meter reading when the heat light goes out.

A.A temperature variance more than 5°F indicates an adjustment is needed.

1)To make the adjustment, proceed to step 6.

2)If temperature variance is less than 5°F, computer control is functioning properly.

6.Enter the setup mode as outlined in SETUP MODE under COMPUTER CONTROL (WKGC/WKGCX).

A.Advance through the menu until CAL1 (Calibration Offset) appears.

1)If the thermocouple reading is higher than set point temperature, press the down arrow key and enter a negative offset value that is equal to the number of degrees above the 5°F tolerance.

Page 27 of 64 F32700 (February 2006)