8 – 5
6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at
room temperature.
7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given of by the spray
and turn off before food is properly cooked.
8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
WARNING: The oven should be fully assembled before following procedure.
Make sure the oven has been plugged in at least two minutes before checking sensor cook operation. The cabinet should be installed and screws
tightened.
1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
2) Place the container on the center of tray in the oven cavity.
3) Close the door.
4) Touch the POWER LEVEL pad, the number pad 1, the POWER LEVEL pad, the number pad 2 and the POWER LEVEL pad, then open the door
and touch the START pad within 10 seconds. Then, close the door. And touch the number pads 1 once and the number pad 4 once. Now, the oven
is in the sensor cooking condition, and “AH20”, “SENSOR” and “COOK” will appear in the display.
5) The oven turns off automatically, and the time for detecting moisture will be displayed.
If ERROR is displayed or the oven does not turn off, replace the humidity sensor or check the control unit, refer to explanation below.
1. TESTING METHOD FOR HUMIDITY SENSOR AND/OR CONTROL UNIT
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.
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 (7.2 oz) 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 POWER LEVEL pad, the number pad 1, the POWER LEVEL pad, the number pad 2 and the POWER LEVEL pad, then open the
door and touch the START pad within 10 seconds. Then, close the door. And touch the number pads 1 once and the number pad 4 once.
e) The control panel is in automatic Sensor operation.
f) The oven turns off automatically, and the time for detecting moisture will be displayed.
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below.
2. 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.
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 inverter unit.
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 POWER LEVEL pad, the number pad 1, the POWER LEVEL pad, the number pad 2 and the POWER LEVEL pad,
then open the door and touch the START pad within 10 seconds. Then, close the door. And touch the number pads 1 once and the number pad
4 once.
b) The control panel is in the sensor cooking operation.
c) After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This condition is same as judgement by humidity sen-
sor.
d) After approximately 3 seconds, the display shows “X X. X X “ which is the time for detecting moisture.
R-350Y(S)
