34
provide power to the bake element once again. After the
first cycle the preheat light is turned off and whenever the
oven calls for heat, the EOC cycles the broil element on
for seven seconds and then the bake element on for fifty
three seconds out of every minute. This provides top
heat during the bake cycle. The two elements will never
be on at the same time.
NOTE: Oven controls may have a temperature
swing of more or less than 20 degrees. The
important thing is the average temperature in the
oven. The average temperature in the center of the
oven should be within 10 degrees of the
programmed temperature.
Broil:
When the broil pad is touched, and High or Low is set
with the up or down arrows, the broil relay on the board
closes. This connects one side of the line to the broil
element. In the tip of the oven sensor is a positive
thermistor that increases in resistance as the oven
temperature increases. The microprocessor reads the
resistance of the oven sensor, and compares it with a
programmed temperature set into the control. Usually
you do not want the broil element to cycle so the oven
door is opened to the broil stop position. If the door is not
opened the broil element will cycle when the set
temperature is reached.
Clean:
With the oven door closed, contacts COM to NO of the
oven door switch close. Then when the clean pad is
touched and a clean time is set the door lock relay on the
electronic oven control closes providing line to neutral
voltage (120 VAC) to the lock motor. “CLN” appears in
the display and the lock indicator light blinks. The lock
motor starts to rotate, closing the contacts of the door
lock switch. When the motor rotates one half turn the
contacts of the door lock switch reopen sending a signal
to the EOC that the door is locked, and to open the
contacts of the lock relay. The lock indicator light then
glows steady and the EOC closes the bake relay
providing power to the bake element. The clean
temperature is preset into the EOC at around 860° F. It
takes about 45 minutes for the oven to reach 860° F.
When the temperature is reached the control cycles the
bake element off and on to maintain the temperature until
the clean time is completed. When the clean time is
completed the EOC removes power from the bake
element and the oven cools down. When the temperature
in the oven goes below 500° F the control closes the
contacts of the lock relay. The lock motor then turns 180
degrees closing and reopening the contacts of the lock
switch and unlocking the door. The open contacts of the
lock switch tells the control that the door is unlocked and
to open the contacts of the lock relay and turn the lock
indicator light off.
Calibration:
To check oven calibration:
1.
Place a thermometer or thermocouple in the
center of the oven.
2.
Program the oven for bake and the temperature to
350° F. Allow the oven to cycle three times.
3.
Average the highest and lowest readings. The
average should be within 10° of 350° F.
To change the calibration:
1.
Touch the bake pad on the control, and using the
up arrow set the oven temperature to maximum
(550° F).
2.
Within 3 seconds touch and hold the bake pad
(about 5 seconds) until “00” appear in the display.
NOTE: If any numbers other than “00” appear in
the display, the control has been previously
calibrated in the field.
3.
By using the up or down arrows the calibration
temperature can be c or - 35° F.
4.
When the desired calibration is reached, touch the
cancel pad to return the control to normal operation.
Troubleshooting:
The ES 200 has some self diagnostics built into the
microprocessor to help in troubleshooting the system.
When a failure occurs one of three codes will appear in
all the display windows; F1, F3 and F9.
F1 code:
An F1 indicates a malfunction in the control itself, and
the control should be replaced.
F3 code:
An F3 indicates a defective sensor, electronic oven
control or the wiring in between. To determine which
part is defective:
1.
Disconnect the 15 pin plug from the back of the oven
control that connects the sensor to the oven control.
Summary of Contents for NEXT GEN
Page 30: ...30 SAMPLE SCHEMATIC FOR ES100 CONTROL SYSTEM ...
Page 37: ...37 SAMPLE SCHEMATIC FOR THE ES 200 CONTROL SYSTEM ...
Page 46: ...46 SAMPLE SCHEMATIC FOR THE ES 300 CONTROL SYSTEM ...
Page 56: ...56 SAMPLE SCHEMATIC FOR THE ES 400 CONTROL SYSTEM ...
Page 66: ...66 SAMPLE SCHEMATIC FOR THE ES 450 CONTROL SYSTEM ...
Page 87: ...87 NOTES ...
Page 88: ...88 ...
