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degrees, the control closes the contacts of the lock
relay. The lock motor 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.
CALIBRATION
To check oven calibration:
1. Place a thermometer or thermocouple in the center
of the oven.
2. Program the oven temperature for 350 degrees.
Allow the oven to cycle three times.
3. Average the highest and lowest reading. The average
should be within 10 degrees of 350.
To change the calibration:
1. Touch the bake pad on the control, and using the up
arrow set the oven temperature to maximum 550
degrees.
2. Within 3 seconds touch and hold the bake pad
(usually about 5 seconds) until "00" appear in the
display.
Note:
If any numbers other than "00" appear in
the display, the control has been calibrated
in the field before.
3. By using the up or down arrows the calibration
temperature can be changed + or - 35 degrees.
4. When the desired calibration is reach, touch the
cancel pad to return the control to normal operation.
TROUBLESHOOTING
The ES 300 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 or F9.
F1 code:
F1 indicates a malfunction in the control itself, and the
control should be replaced.
F3 code:
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.
2. With an Ohmmeter measure the resistance between
pins 12 and 13 in the plug (not on the control
board). If the meter reads around the value of the
oven temperature sensor resistance chart the oven
control is defective. If the meter reads less than 800
Ohms or more than 3000 Ohms, go to step 3.
Temperature
32 ± 1.9
75 ± 2.5
250 ± 4.4
350 ± 5.4
450 ± 6.9
550 ± 8.2
650 ± 9.6
900 ± 13.6
3. Disconnect the harness from the oven sensor and
measure the resistance of the oven sensor. If the
reading is the same as that in step two the oven
sensor is defective. If the reading is correct with
the chart the harness is defective.
F9 code:
F9 code indicates the control has detected a problem
with the motor door latch assembly. Check the contacts
of the lock switch, wiring to the lock motor assembly,
and the lock motor.
Control will not program:
If the control will not program check for an open sensor
circuit. If the sensor circuit is good replace the control.
Time bake does not operate:
If the time bake feature does not operate check to be
sure it is being programmed correctly. If so replace the
control.
Blank Display:
If the display on the oven control is blank, with the range
connected to electrical power:
1. Go to the back of the control, disconnect the 15 pin
plug and measure the voltage drop between pins 4
and 5 in the plug. If the meter reads line to neutral
voltage (120 VAC) the control is defective. If the
meter reads zero the wiring in the range is defective.
57
RTD
SCALE
(°F)
Resistance
(ohms)
1000 ± 4.0
1091 ± 5.3
1453 ± 8.9
1654 ± 10.8
1852 ± 13.5
2047 ± 15.8
2237 ± 18.5
2697 ± 24.4
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Table of Contents
Troubleshooting
