Fig. 38
8.
Replace the knob and verify the setting is still at
350°F.
9.
Repeat step 7 until the average temperature is
within tolerance.
NOTE:
Allow the oven to cycle at least two times
between adjustments before performing the
calculation.
A.
After the final adjustment is made and the
average temperature is within tolerance,
remove the knob and apply a nonpermanent
type sealer around the head of the set screw
10. If the above adjustment cannot be obtained:
A.
Turn the power switch OFF.
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
There may be multiple circuits. Be sure
all circuits are disconnected.
B.
Install a replacement thermostat and check
calibration.
SOLID STATE TEMPERATURE
CONTROL TEST
Certain procedures in
this section require electrical test or
measurements while power is applied
to the machine. Exercise extreme
caution at all times and follow Arc Flash
procedures. If test points are not easily
accessible, disconnect power and
follow Lockout/Tagout procedures,
attach test equipment and reapply
power to test.
1.
NOTE:
If right side panel is not accessible, this
component can be serviced by removing CONTROL
PANEL.
2.
Place a thermocouple in the geometric center of
the oven cavity.
NOTE:
Oven temperature must be below 450°F.
NOTE:
If oven is equipped with "Cook and Hold"
option, set to Cook (normal cooking) before
continuing.
3.
Set the temperature control to the maximum
setting.
4.
Check machine data plate for correct voltage to
oven. Refer to diagram below for proper terminal
locations and voltages before checking the
control. Use the correct terminals for the
corresponding voltage.
5.
Turn the power switch to ON.
Fig. 39
VC4E & VC6E Series Full Size Electric Convection Ovens - SERVICE PROCEDURES AND ADJUSTMENTS
Page 23 of 64
F25105 Rev. B (0217)
