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R-430BK
EEY
Procedure Letter
Component Test
L
.
AH Sensor Test
Checking the initial sensor cooking condition
1. The oven should be plugged in at least five minutes before sensor cooking.
2. Room temperature should not exceed 95" F (35" C).
3. The unit should not be installed in any areas where heat and steam are generated. The unit should
not be installed, for example, next to a conventional
surface unit.
4. Exhaust vents are provided on the bottom of the unit for proper cooling and air flow in the cavity.
To permit adequate ventilation, be sure to install so as not to block these vents.
There should be some space for air circulation.
5. Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any mois-
ture with a dry cloth or paper towel.
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 off by the spray and turn off before the 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
Note: The cabinet should be installed and screws tightened.
_
Make sure the oven has been plugged in at lease five minutes before checking sensor cook opera-
tion.
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 Reheat pad once and touch the Start pad, Now, the oven is in the sensor cooking operation
and "REHEAT" "SENSOR" "COOK" will appear in the display.
5. Now the oven will operate for the first 16 seconds without generating microwave energy.
Note: ERROR will appear if the door is opened or Stop/Clear pad is touched during first stage of sen-
sor cooking.
6. After approximately
16 seconds, microwave energy is produced,
the oven should turn off when
water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit.
Testing Method for AH Sensor and/or Control Unit
To determine if the sensor is defective, the simplest method is to replace it with a new sensor.
1. Disconnect the power supply cord, and then remove outer case cabinet.
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2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Remove the AH sensor.
5. Install the new AH sensor.
6 Reconnect all leads removed from components during testing.
7. Re-install the outer case.
8. Reconnect the power supply cord and check the sensor cook operation, proceed 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 Reheat pad once and touch the Start pad.
E. The control panel is in automatic Sensor operation.
F, The oven will turn off automatically when the water is boiling (bubbling).
If the new sensor does not operate properly, the problem is with the control unit.
Checking the Control Unit
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. Disconnect the sensor connector that is mounted to control panel.
5. Then connect the dummy resistor circuit (see fig. A) to the sensor connector of control panel.
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