Sharp R-961 (W) - Page 10

OPERATION SEQUENCE
selected preheat temperature, the raleiy RY3 is ; de-
energized by the control unit temperature circuit, opening
the convection heating element.
In the case of an oven temperature above 180°C being
programmed, when the oven temperature reaches the
selected preheat temperature, the relay RY3 is de-
energized by the control unit temperature circuit, opening
the convection heating element at first. And then after the
thermistor temperature reaches the programmed
temperature, the relay RY4 is de-energized opening the
grill heating element. Because the oven temperature
reaches the programmed temperature faster by grill
heating element than the thermistor temperature.
NOTE: The relay RY4 is energized and the grill heating
element is turned on in preheating condition only. It
does not operate in convection cooking condition.
4. The oven will continue to function for 30 minutes,
turning the convection heating elements on and off, as
needed to maintain the selected preheat temperature.
The oven will shut-down completely after 30 minutes.
CONVECTION COOKING CONDITION
(Figure 0-3)
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. Program desired cooking time and
convection temperature by touching the CONVECTION key.
When the START key is touched, the following operations
occur:
1. The numbers of the digital read-out start the count down
to zero.
2. The oven lamp, cooling fan motor, turntable motor and
convection motor are energized.
3. Relay RY3 is energized If the cavity temperature is lower
than the selected temperature) and the main supply
voltage is applied to the convection heating element to
return tothe 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 convection cycle, if the cavity air temperature is above
104°C, the circuit to RY5 will be maintained (by the
thermistor circuit) to continue operation of the cooling fan
motor until temperature drops below 104°C, at that time
the relay will be de-energized, turning off the fan motor .
GRILL COOKING CONDITION (Figure O-4)
In this condition the food is cooked by grill heating element
energy. And after the initial period (approximately 10 min-
utes) the convection heater element is also activated. Pro-
gram desired cooking time and grill mode by touching TIME
keys and GRILL key. When the START key is touched, the
following operations occur:
1. The numbers of the digital read-out start the count down
to zero.
2. The oven lamp, cooling fan motor and turntable motor
are energized.
3. The relay RY4 is energized and the grill heating element
is energized.
4. If the cavity temperature is lower than 172°C, the relay
RY6, relay RY3, convection motor and the convection
heating element are energized. When the cavity
temperature reaches 172°C, the relay RY6, relay RY3,
R-961 -
8
convection motor and the convection heating element
are de-energized.
5. Now, the food is grilled by the grill heating elements.
6. During the first 15 minutes of grill operation, the grill
heating element is on continuously.
7. After 15 minutes, the grill heating element is turned on
and off as shown in the figure.
s 15 min. ‘ 25 sec. 2s sec, 25 sec.
ON —1————_-2
Sr
OFF
START is
7 eon 7 eee 7 sae:
DUAL COOKING CONDITION
The oven has two Dual cooking conditions. One is micro-
wave and convection mode and the other is microwave and
grill mode. In both modes, the relay RY2 operates intermit-
tently within a 48 seconds time base as shown below.
Power level OFF time
70% 12 sec.
50%
30%
10%
Power level 100% can not be programmed in Dual cooking
condition.
MICROWAVE AND CONVECTION (Figure O-5)
Program desired cooking time and Dual cook mode by
touching the TIME keys and DUAL COOK key once. When
the START key is touched, the following operations occur:
1. The numbers of the digital read-out start the count down
to zero.
2. The oven lamp, cooling fan motor, turntable motor and
convection motor are energized.
3. Relay RY3 is energized (If the cavity temperature is lower
than the selected temperature) and the main supply
voltage is applied to the convection heating element.
4. Relay RY2 is energized and the microwave energy is
generated by the magnetron.
5. Now, the foodis cooked by the microwaveand convection
heating elements energy simultaneously,
MICROWAVE AND GRILL (Figure 0-6)
Program
desired
cooking
time
and
Dual
cook
mode
by
touching the TIME keys and DUAL COOK key twice. When
the START key is touched, the following operations occur:
1. The numbers of the digital read-out start the count down
to zero.
2. Theovenlamp, cooling fan motor and turniable motor are
energized.
3. Relay RY4 is energized and the main supply voltage is
applied to the grill heating element.
4. Relay RY2 is energized and the microvave energy is
generated by magnetron.
5. Now, the food is cooked by the microyave and grill
heating elements energy simultaneously.
SNACK, POTATO AND INSTANTACTION
CONDITION
When the menu and quantity are input, the oven chooses
cooking mode (Microwave, Convection, Gri| or Dual) and
sets cooking time automatically according » the pre-pro-
grammed information in IC-1 (LSI).