Electrolux E30MO65GSSB, Technical & Service Manual

Page: 17 / 64

Operation
2-5
Convection Cooking Condition
PREHEATING CONDITION
Program desired convection temperature by touching the
CONVECTION pad and the TEMPERATURE pad. When
the START pad is touched, the following operations
occur:
1. The coil of shut-off relays (RY1, RY3, RY5 and RY6)
are energized, the oven lamp, cooling fan motor, turn-
table motor and convection motor are turned on.
2. The coil of relay (RY4) is energized by the control
unit. The damper is moved to the closed position,
opening the damper switch contacts. The opening of
the damper switch contacts sends a signal to the LSI
on the control unit de-energizing the relay (RY4) and
opening the circuit to the damper motor.
3. The coil of heater relay (RY3) is energized by the
control unit and the main supply voltage is applied to
the heating element.
4. When the oven temperature reaches the selected
preheat temperature, the following operations occur:
4-1. The heater relay is de-energized by the control
unit temperature circuit and thermistor, opening
the circuit to the heating element.
4-2. The oven will continue to function for 30 minutes,
turning the heater on and off, as needed to
maintain the selected preheat temperature. The
oven will shut-down completely after 30 minutes.
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. Touch the CONVEC
pad first and then touch the TEMPERATURE pad.
Program desired cooking time by touching the NUMBER
pads. When the START pad is touched, the following
operations occur:
1. The numbers on the digital read-out start to count
down 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 heating
element to return to selected cooking temperature.
4. Upon completion of 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 275°F, the circuit to RY6 will
be maintained (by the thermistor circuit) to continue
operation of cooling fan motor until the temperature
drops below 245°F, 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.
5. At the end of the convection cook cycle, shut-off relay
(RY4) is energized 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).
Automatic Mix Cooking Condition
Touch the HIGH MIX/ROAST or the LOW MIX/BAKE pad
first, then program desired cooking time by touching
the NUMBER pads. The LOW MIX/BAKE pad is
preprogrammed for 350°F with 10% microwave power,
while the HIGH MIX/ROAST pad is preprogrammed for
300°F with 30% microwave power. When the START pad
is touched, the following operations occur:
1. The numbers on the digital read-out start to count
down to zero.
2. The shut-off relays (RY1,RY2,RY3,RY5 and RY6) are
energized, turning on the oven lamp, turntable motor,
cooling fan motor and convection fan 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, applying the
main supply voltage to the heating element.
5. Now, the oven is in the convection cooking condition.
6. When the oven temperature reaches the selected
temperature, the following operations occur:
6-1. The power supply voltage is alternated to the
heating element and power transformer.
6-2. The heating element operates through the heater
relay (RY3) contacts and the power transformer
operates through the primary interlock relay
(RY2) contacts.
6-3. These are operated by the control unit to supply
alternately within a 32 second time base,
convection heat and microwave energy.