Electrolux EI30SM55JB Technical & Service Manual page 36

Troubleshooting and Testing
Procedure
Letter
TESTING METHOD FOR HUMIDITY SENSOR AND/OR CONTROL UNIT
P
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
4. Remove the humidity sensor.
5. Install the new humidity sensor.
6. Reconnect all leads removed from components during testing.
7. Re-install the outer case (cabinet).
8. Reconnect the power supply cord after the outer case is installed.
9. Reconnect the oven to the power supply and check the sensor cook operation as follows:
a) Fill approximately 200 milliliters of tap water in a 1000 milliliter measuring cup.
b) Place the container on the center of tray in the oven cavity.
c) Close the door.
d) Touch the SET/CLOCK pad once, the POWER LEVEL pad twice and the START pad once.
e) The control panel is in automatic Sensor operation.
f)
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation
below.
CHECKING CONTROL UNIT
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
4. Disconnect the sensor connector that is mounted to control panel.
5. Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
6. Disconnect the leads to the primary of the power transformer.
7. Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
8. After that procedure, re-connect the power supply cord.
9. Check the sensor cook operation proceed as follows:
a) Close the door. Touch the SET/CLOCK pad once, the POWER LEVEL pad twice and the
b) The control panel is in the sensor cooking operation.
c) After approximately 41 seconds, push plunger of select switch for more than 3 seconds. This
d) After approximately 3 seconds, the display shows "X X. X X " which is the time for detecting
If the above is not the case, the control unit is probably defective.
If the above is proper, the humidity sensor is probably defective.
continued on next page
And touch the number pads 1 once and the number pad 2 once.
The oven turns off automatically, and the time for detecting moisture will be displayed.
START pad once. And touch the number pads 1 once and the number pad 2 once.
condition is same as judgement by humidity sensor.
moisture.
Component Test
3-14