ZMM Haskovo Joybook R48 Series Service Manual download pdf (Page 22)

PMOR3021S

PMOR3021B

PMOR3021R

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

9) Disconnect the power supply cord.

10) Open the door and block it open.

11) To discharge high voltage capacitor, wait for 60 seconds.

12) Reconnect all leads removed from components during testing.

13) Re-install the hood intake duct R.

14) Re-install the outer case (cabinet).

15) Reconnect the power supply cord after the outer case is installed.

16) Run the oven and check all functions.

Checking the initial sensor cooking condition

WARNING : The oven should be fully assembled before following procedure.

(1) The oven should be plugged in at least two minutes before sensor cooking.

(2) Room temperature should not exceed 95

F (35

C).

(3) The unit should not be installed in any area where heat and steam are generated. The unit should not be

installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS”

of the operation manual.

(4) Exhaust vents are provided on the back 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 moisture

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 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 TIMER/CLOCK once, the POWER LEVEL pad twice, the START pad once, the number pad

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 will operate for the first 32 seconds, without generating microwave energy.

NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor

cooking.

(6) After approximately 32 seconds, microwave energy is produced.

If ERROR is displayed or the oven does not turn off, replace the humidity sensor or check the control unit,

refer to explanation below. If the oven stops after 5 minutes and ERROR is displayed, the h umidity sensor

is normal. Check other parts except the Humidity sensor.

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.Refer to procedure of “HOOD LOUVER

REMOVAL”, “REMOVAL OF OVEN FROM WAL ” and “OUTER CASE REMOVAL”.

(2) Open the door and block it open.

(3) To discharge high voltage capacitor, waite for 60 seconds.

(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.

O HUMIDITY SENSOR TEST FOR R-2120J

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ZMM Haskovo Joybook R48 Series Service Manual Page 22

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