TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor cooking.
(6)After approximately 16 seconds, microwave energy is produced, and the display should start to count down the remaining cooking time and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.
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 replacement sensor.
(1)Disconnect oven from power supply and remove outer case.
(2)Discharge the high voltage capacitor.
(3)Remove the AH sensor.
(4)Install the new AH sensor.
(5)
(6)Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
If new sensor dose not operate properly, the problem is with the control unit.
CHECKING CONTROL UNIT
(1)Disconnect oven from power supply and remove outer case.
(2)Discharge the high voltage capacitor.
(3)Disconnect the wire leads from the cook relay.
(4)Disconnect the sensor connector that is mounted to lower portion of control panel.
(5)Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6)Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
condition | is same as judgement by AH sensor. |
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time, and the display count down. |
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If the above is not the case, the control unit is probably defective. |
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If the above is proper, the AH sensor is probably defective. |
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| Plunger |
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| R1,R2 : 22Ω ± | 1% 1/2W | NC | ||
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| NO | ||||
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| R3 : 4.3kΩ ± 5% 1/4W | ||||
| To connector (F) | R4 : | 1M | 5% 1/4W |
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| Ω ± |
| COM | |
| on Control Unit. |
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1 |
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| NO | |
2 |
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| COM | ||
| R1 |
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3 |
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| R2 | R3 | R4 | NC | |
| CONNECTOR |
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| Sensor Dummy Resistor Circuit |
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