Electrolux 30" Service Manual page 86

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. 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 850° F. It
takes about 45 minutes for the oven to reach 850° 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 reading. The
average should be within 10° F of 350° F.
To change the calibration:
To adjust the oven temperature higher:
1. Press the Bake pad for 6 seconds. "00" will appear
in the display.
NOTE: If any numbers other than "00" appear in the
display, the control has been previously
calibrated in the field.
2. To increase the temperature, use the number pads
to enter the desired change. The temperature may
be increased up to 35° F.
3. Press Cancel to accept the temperature change
and the display will return to the time of day.
To adjust the oven temperature lower:
1. Press the Bake pad for 6 seconds. "00" will appear
in the display.
2. To decrease the temperature, use the number pads
to enter the desired change and then press Start.
The temperature may be decreased up to 35° F.
3. Press Cancel to accept the temperature change
and the display will return to the time of day.
Troubleshooting:
The PRC Glass touch 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 the display window: F1, F3 or F9.
F1 code:
An F1 indicates a malfunction in the EOC 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 seven pin plug from the back of the
EOC that connects the sensor to the oven control.
2. With an Ohmmeter measure the resistance between
pins 6 and 7 in the P3 plug (not on the EOC). If the
meter reads around the value of the oven temperature
sensor resistance chart shown below, the oven
control is defective. If the meter reads less than 800
Ohms, or more than 3000 Ohms, go to step 3.
RTD
Temperature Degrees F.
32 +/- 1.9
75 +/- 2.5
250 +/- 4.4
350 +/- 5.4
450 +/- 6.9
550 +/- 8.2
650 +/- 9.6
900 +/- 13.6
95
SCALE
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