FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
A.If voltage is correct, SSR is functioning properly.
B.If no voltage is present on the load side of SSR terminal 2, the SSR is not functioning properly.
7.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.
8.Replace the SSR and check for proper operation.
COMPUTER CONTROL
TEMPERATURE CALIBRATION
1.Place a thermocouple in the geometric center of the oven cavity.
2.Turn the power switch 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".
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.
2)If the thermocouple reading is lower than set point temperature, press the up arrow key and enter a positive offset value that is equal to the number of degrees below the 5°F tolerance.
3)Exit the setup mode.
7.Allow the oven to cycle at least two times between adjustments.
A.If the temperature variance still differs more than 5°F from the set point, verify the correct calibration offset value was entered and retained.
1)Adjust the calibration offset value as outlined in step 6, until the cycling temperature is within tolerance.
B.If the above adjustment cannot be obtained:
C.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.
D.Replace the computer control and check for proper operation.
COMPUTER CONTROL
OPERATIONAL TEST
The computer controls "Calibration Mode" is used to manually test:
•Outputs of the control
•Keypad functionality
•Verify display and LEDs functionality
Additionally, if a problem is encountered during the output test, a "Restore Factory Settings" option is available.
CAUTION: The calibration mode contains several adjustable parameters that must not be changed. For the "CALY" (Calibration) Parameter, the default data option selected must be "no".
F25105 (December 2001) |
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