Sharp Carousel R-990K 서비스 매뉴얼 - 페이지 8

{카테고리_이름} Sharp Carousel R-990K에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Sharp Carousel R-990K 48 페이지. Convection microwave oven
Sharp Carousel R-990K에 대해서도 마찬가지입니다: 운영 매뉴얼 (41 페이지)

페이지 인쇄

R990K(W)

2) The oven will continue to function for 30 minutes, turning the

convection heater on and off, as needed to maintain the

selected preheat temperature. The oven will shut-down com-

pletely after 30 minutes.

2. CONVECTION COOKING CONDITION

When the preheat temperature is reached, a beep signal will sound

indicating that the holding temperature has been reached in the oven

cavity. Open the door and place the food to be cooked in the oven.

Press the CONVEC-TION pad and then enter the cooking temperature

by pressing the temperature pad. And then enter the cooking time by

pressing the NUMBER pads. When the START pad is touched, the fol-

lowing operations occur:

1. The numbers of the digital read-out start the countdown to zero.

2. The oven lamp, turntable motor, cooling fan motor and convection

motor are energized.

3. Heater relay (RY3) is energized (if the cavity temperature is lower

than the selected temperature) and the main supply voltage is

applied to the convection heater to return to the selected cooking

temperature.

4. Upon completion of the cooking time, the audible signal will sound,

and oven lamp, turntable motor, cooling fan motor and convection

motor are de-energized. At the end of the convection cycle, if the

cavity air temperature is above 116°C, the circuit to(RY6) will be

maintained (by the thermistor circuit) to continue operation of the

cooling fan motor until the temperature drops below 116°C, at

which time the relay will be de-energized, turning off the fan

motor.Relay (RY5) will however, open as soon as the convection

cycle has ended, turning off the convection fan motor. This will now

cool and allow the damper door to open.

5. At the end of the convection cook cycle, shut-off relay(RY4) is ener-

gized turning on the damper motor. The damper is returned to the

open position, closing the damper switch contacts which send a

signal to the control unit, de-energizing shut-off relay (RY4).

[4] AUTOMATIC MIX COOKING CONDITION

Choose the LOW MIX or HIGH MIX by pressing the LOWMIX pad or

HIGH MIX pad. And then enter cooking time by pressing the NUMBER

pads. When the START pad is touched, the following operations occur:

1. The numbers of the digital read-out start the countdown to zero.

2. The shut-off relay (RY1+RY5+RY6) energized, turning on the oven

lamp, turntable motor, cooling fan motor and convection motor.

3. The shut-off relay (RY4) is energized.

The damper door is closed from the open position.

4. The heater relay (RY3) is energized, adding the mains supply volt-

age to the convection heater.

5. Now, the oven is in the convection cooking condition.

6. When the oven temperature reaches the selected temperature, the

following operations occur:

1) The power supply voltage is added to the convection heater and

power transformer alternately.

2) The convection heater operates through the heater relay (RY3)

contacts and the power transformer operates through the cook

relay (RY2) contacts.

3) These are operated by the CPU unit to supply alternately within

a 48 second time base, convection heat and microwave energy.

The relationship between the convection and microwave power opera-

tions are as follows.

NOTE: The ON and OFF time ratio does not correspond with the per-

centage of microwave power, because approx. 2 seconds are

needed for heating of the magnetron filament.

8 S E C .

(MIC R O.)

OF F

(C ONV E C .)

16 S E C .

(MIC R O.)

(C ONV E C .)

OF F

NOTE: During alternate Microwave/Convection operation, the con-

vection heater is energized only if the cavity temperature

drops below the set temperature.

[5]

ABSOLUTEHUMIDITYSENSOR

SENSOR)COOKING CONDITION

n case where the AH sensor is used (REHEAT SENSOR or SENSOR

INSTANT ACTION), the foods are cooked in microwave cooking mode

without figuring time, power level or quantity. When the oven senses

enough steam from the food, it relays the information to its micropro-

cessor which will calculate the remaining cooking time and power level

needed for best results. When the food is cooked, water vapour is

developed. The sensor "senses" the vapour and its resistance

increases gradually. When the resistance reaches the value set

according to the menu, supplementary cooking is started. The time of

supplementary cooking is determined by experiment with each food

category and inputted into the LSI.An example of how sensor works:

1. Potatoes at room temperature. Vapour is emitted very slowly.

2. Heat potatoes. Moisture and humidity is emitted rapidly.You can

smell the aroma as it cooks.;

5 – 2

40 S E C .

MIC R OWAV E P OWE R

= AP P R OX. 10%

C ONV E C T ION

T E MP E R AT UR E

LOW MIX

32 S E C .

MIC R OWAV E P OWE R

OF F

= AP P R OX. 30%

C ONV E C T ION

T E MP E R AT UR E

48 S E C .

HIG H MIX

= 180û C

= 200û C

(AH