Computer Control Calibration (Wkgc/Wkgcx) - Wolf WKG SERIES Service Manual

FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
MENU
Celsius_Fahrenheit
Guard Band
Temperature
Compensation
Input Type 1
Range Low 1
Range High 1
Hysteresis
Calibration Offset
Exit Setup Mode and
return to Operation
Mode.
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.
ALTERNATING ON
DISPLAY
PARAMETER DATA
C_F F
gb 4000
tcnP OFF
InP1 J
rL1 75
rH1 500
HYS1 3
CAL1 0
set point temperature is
displayed or if call for
heat, dashes (----)
displayed.
Page 27 of 64
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.
F32700 (February 2006)