CONVECTION MOTOR
The convection motor drives the convection fan and
provides the heated air.
FAN MOTOR
The fan motor drives a blade which draws external cool
air. This cool air is directed through the air vanes sur-
rounding the magnetron and cools the magnetron. This
air is channeled through the oven cavity to remove
steam and vapors given off from the heating foods. it is
then exhausted through the exhausing air vents at the
oven cavity.
CONVECTION HEATER
The convection heater is located at the rear of ?he oven
cavity. It is intended to heat air driven by the convection
fan. The heated air is kept in the oven and force-circu-
lated and reheated by the convection heater.
THERMAL CUT-OUT 170-C (OVEN)
The thermal cut-out protect ihe conves:!en ~FZIC:
against overheating. If its temperature $1 the ;op:iec:io:-
motor rises above 17% because the corveciior; ‘a~:
motor is interrupted, the ventliarion ,o:peni?gs ark oo-
strutted or the other abnormai matter cccures. 2-e :her-
mal cut-out opens and switch off the o\/er. W?X ihe
thermal cut-out cools itself down to i 55 C. :rie scritacts
of the thermal cut-out will close again.
THERMAL CUT-OUT 9O’C (FAN MOTOR)
The thermal cut-out protect the fan motor against over-
heating. If its temperature goes up higher than 96°C
because the fan motor is locked or the ventilation oper-
ating are blocked, the contacts of the thermal cut-out
will open and switch off the oven. When the thermal cut-
out cools itself down to 70X, the contacts of the thermal
cut-out will close again.
TEMPERATURE FUSE 1502 (MG)
This fuse protects the magnetron against overheating.
If the temperature goes up higher than 150°C because
the fan motor is interrupted, the air inlet ductis blocked
or the ventilation operatings are obstructed. the fuse
blows and cuts off the power supplying to the power
transformer. The defective fuse must be replaced with
new rated one.
CONVECTION COOKING SYSTEM
This oven is designed with a hot air heating system
where food is not directly heated by the convection
heater, but is heated by forced circulation of the hot air
produced by the convection heater.
The air heated by the convection heater is circulated
through the convection passage provided on the outer
casing of the oven cavity by means of the convection
fan which is driven by the convection motor. It then en-
ters the inside of the oven through the vent holes pro
vided on the left side of the oven. Next. the hot air heats
R-9X55
the food on the turntable and leaves the oven cavity througn
the vent in the oven cavity left side wall.
Without leaving the oven, this hot air is reheated by the con-
vection heater. passes through the convection passage and
enters the inside of the oven cavity again. in a continuing
cycle.
In this way. the hot air circulates instde the oven cavity to
raise its temperature and. at the same time. comes into con-
tact with the food being cooked.
When the temperature inside the oven cavity reaches the
selected temperature. the convection heater is de-energtzed.
When the temperature inside Ihe oven cavity drops beiosv thy
seiected temperature. the convection heater is energlzeo
again. In this way, th
e inside of the 3ven cavit:J ‘s maintalneo
ar approximateiy the se!ec:ed temperature.
When the convectton !rme reaches 1% the L’on;ec:lori healer
1s deenergzed and ine conx;ecflcr ‘an stoos ooeratnc ant
the oven shutts cff.
Lpon completion of the ~ook+g 11~5. the audible stcna: NI/~
s.ound. and c\/en ianp, :br:tabie c;~G~~:Y. c:z~;rn:7 $2~
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aiicw tne damper door IG 3o?‘1’
DAMPER OPEN-CLOSE MECHANISM
tisualiy, the damper is iii rhe oole~? position ~xseot dLr,ng
convection cooking.
Damper position is set automa?cally by damper motor
damper switch, motor cam and damper shaft.
These components are operated by a signal :ha: judges if
microwave cooking or convection cooking operation is se-
lected by the CPU unit.
Microwave Cooking:
Damper is in the open position, because a portion of cooling
air is channeled through the cavity to remove steam and
vapors given off from the heating foods.
It is then exhausted at the top of the oven cavity into a con-
densation compartment.
Convection Cooking:
Damper is in the closed position. so that no hot air wif! be
allowed to ieak out the oven cavity.
Damper Operation
1. When power supply cord is plugged in:
I-1.
l-2.
1-3.
1-4.
When power supply cord is plugged ir a signal is
sensed in the control unit,
(RY4).
and operates shut-off relay
Contacts of shut-off relay (RY3) close. the damper mo-
tor is energized. opening the damper door.
When the damper is mcved to the open position by the
damper cam. damper switch is closed iON position).
The signal of damper switch is re-sensed in the control
unit and shut-off relay iRY4; IS turned off.
9
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