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R86STM

5 – 2

In this condition the food is cooked by the top grill heating element.
Programme the desired cooking time by touching the TIME keys and
touch the GRILL key once. When the START key is touched, the fol-
lowing operations occur:

1. The numbers on the digital readout start the count down to zero.

2. The oven lamp, cooling fan motor and turntable motor are ener-

gized.

3. The relay RY3 is energized and the main supply voltage is applied

to the top grill heating element.

4. Now, the food is cooked by the top grill heating element.

In this condition the food is cooked by bottom grill heating element
energy. Programme the desired cooking time by touching the TIME
keys and touch the GRILL key twice. When the START key is touched,
the following operations occur:

1. The numbers on the digital readout start the count down to zero.

2. The oven lamp, cooling fan motor and turntable motor are ener-

gized.

3. The relay RY4 is energized and the main supply voltage is applied

to the bottom grill heating element.

4. Now, the food is cooked by the bottom grill heating element.

In this condition the food is cooked by top and bottom grill heating ele-
ments energy. Programme the desired cooking time by touching the
TIME keys and touch the GRILL key three times. When the START
key is touched, the following operations occur:

1. The numbers on the digital readout start the count down to zero.

2. The oven lamp, cooling fan motor and turntable motor are ener-

gized.

3. The relay RY4 is energized and the main supply voltage is applied

to the bottom grill heating element.

4. The relay RY3 is energized and the main supply voltage is applied

to the top grill heating element. 

5. Now, the food is cooked by the top and bottom grill heating ele-

ments.

Programme the desired convection temperature by touching CONV.
key. When the START key is touched, the following operations occur:

1. The coil shut-off relays RY1 and RY6 are energized, the oven lamp,

cooling fan motor and turntable motor are turned on.

2. The coil shut-off relays RY3 and RY4 are energized by control unit

and the main supply voltage is added to the top and bottom heating
elements.

3. When the oven temperature reaches the selected pre-heat temper-

ature, the following operations occur:

1) The coil shut-off relays RY3 and RY4 are energized by control

unit temperature circuit and thermistor, opening the circuit to the
top and bottom grill heating elements.

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

and bottom heating elements on and off, as needed to maintain
the selected pre-heat temperature. The oven will shut-down
completely after 30 minutes.

When the pre-heat 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.
Programme the desired cooking time by touching the TIME keys and
program convection temperature by touching the CONV. key. When
the START key is touched, the following operations occur:

1. The numbers on the digital readout start the count down to zero.

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

motor are energized.

NOTE: When the convection temperature 40

°C is selected, the con-

vection motor is not energized.

3. The relays RY3 and RY4 are energized (if the cavity temperature is

lower than selected temperature) and the main supply voltage is
applied to the top and bottom heating elements to return to the
selected cooking temperature.

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

and the oven lamp, turntable motor, cooling fan motor, convection
motor, top and bottom heating elements are de-energized. At the
end of convection cycle, if the cavity air temperature rise above
120

°C, the circuit to the relay RY6 will be maintained (by the ther-

mistor circuit) to continue operation of the cooling fan motor until
temperature drops below 105

°C, at that time the relay RY6 will be

de-energized, turning off the fan motor.

Programme the desired cooking time by touching the TIME keys.
Touch the COMBI key once. Select the convection temperature by
touching the CONV. key. And select the microwave power level by
touching the MICRO POWER key. When the START key is touched,
the following operations occur:

1. The numbers on the digital readout start the count down to zero.

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

motor are energized.

3. The relay RY3 will be energized and the main supply voltage is

applied to the top grill heating element.

4. The relay RY4 is energized (if the cavity temperature is lower than

selected temperature) and the main supply voltage is applied to the
bottom heating element.

5. The relay RY2 is energized and the microwave energy is generated

by magnetron.

6. Now, the food is cooked by microwave and convection energy

simultaneously.

Programme the desired cooking time by touching the TIME keys.
Touch the COMBI key twice. And select the microwave power level by
touching the MICRO POWER key. When the START key is touched,
the following operations occur:

1. The numbers on the digital readout start the count down to zero.

2. The oven lamp, cooling fan motor and turntable motor are ener-

gized.

3. The relay RY3 is energized and the main supply voltage is applied

to the top grill heating element.

4. The relay RY2 is energized and the microwave energy is generated

by magnetron.

5. Now, the food is cooked by microwave and top grill simultaneously.

R86STM

5 – 3

Programme the desired cooking time by touching the TIME keys.
Touch the COMBI key three times. Select the microwave power level
by touching the MICRO POWER key. When the START key is
touched, the following operations occur:

1. The numbers on the digital readout start the count down to zero.

2. The oven lamp, cooling fan motor and turntable motor are ener-

gized.

3. The relay RY4 is energized and the main supply voltage is applied

to the bottom grill heating element.

4. The relay RY2 is energized and the microwave energy is generated

by magnetron.

5. Now, the food is cooked by microwave and bottom grill simulta-

neously.

In grill cooking, convection cooking or dual cooking, the top heater,
bottom heater or magnetron operate within a 54 second time base.
The following table is the ON / OFF time ratio at each power output of
the top heaters, bottom heater or magnetron.

The magnetron, top or bottom heating elements, the fan motor or the convection motor will operate in accordance with following specification.

100%

54 sec.

0 sec.

90%

49 sec.

5 sec.

80%

45 sec.

9 sec.

70%

40 sec.

14 sec.

60%

36 sec.

18 sec.

50%

29 sec.

25 sec.

40%

24 sec.

30 sec.

30%

18 sec.

36 sec.

20%

13 sec.

41 sec.

10%

9 sec.

45 sec.

MICROWAVE (100%) 
SINGLE OPERATION

Microwave

100% 20min, then 70%

TOP GRILL (100%) 
SINGLE OPERATION

Top heater

100% 15min, then 50%

BOTTOM GRILL (100%) 
SINGLE OPERATION

Bottom heater

100% 15min, then 50%

TOP(100%)/BOTTOM(100%)
DUAL OPERATION

Top heater

100% 6min then 70% and 70% 9min then 50%

Bottom heater

100% 6min then 70% and 70% 9min then 50%

MICRO(100%)/TOP GRILL(100%)
DUAL OPERATION

Microwave

100% 20min, then 70%

Top heater

100% 15min, then 50%

MICRO(70 - 10%)/TOP GRILL(100%)
DUAL OPERATION

Microwave

-

Top heater

100% 15min, then 50%

MICRO(100%)/BOTTOM GRILL(100%)
DUAL OPERATION

Microwave

100% 20min, then 70%

Bottom heater

100% 15min, then 50%

MICRO(70 - 10%)/BOTTOM GRILL(100%)
DUAL OPERATION

Microwave

-

Bottom heater

100% 15min, then 50%

Repeat Cook

Microwave
Top heater
Bottom heater

In case same cooking mode is repeated within 1min 15sec (including stop, end), 
oven calculates total cooking time and reduce the power level.

Repeat Auto Cook

Microwave

The power level is not reduced 1 time cooking. But only in case same menu is 
repeated within 1min 15sec, the power level of micro and grill is reduced from 
100% to 70% in 20mins after starting of last cooking. (Even if the time of the last 
cooking is longer than 20mins, the power level isn't reduced on the last cooking, 
and it is reduced from the beginning of the next cooking.) However, in time calcu-
lated from the start of the 1st cooking, even if the Cook mode changed, when rep-
etition cooking of the menu with which 100% of top & bottom heaters continues 
are performed, as shown in the following table, the power down of the cooking of 
the 2nd henceforth is carried out. (The 1st cooking is not applied)

R86STM

5 – 4

NOTE:

✩The oven temp was checked by the thermometer when each stage is started.
If the oven temp is same or higher than 105

°C, the oven was judged as "with preheating".

When the oven temp is lower than 105

Micro and Top heating element can't be on at the same time.

PREHEAT

Cooling

60% 

CONV. (OVEN)

Cooling fan

60% 60 min. then 100%

Others

Cooling fan

100%

After cooking

Cooling fan

A cooling fan continues the rotation when Oven temperature is more than 120

°C. 

Then, it stops when it is less than 105

°C

Indication

NOW COOLING is indicated during the cooling fan movement after operation is 
finished. (It isn't indicated during a fan movement to stop on the way.)

°C, 230°C, 220°C, 200°C, 180°C, 160°C, 130°C, 100°C, 70°C, 40°C

HEATING ELEMENT 

TOP 100%
BOTTOM

100%

COOLING FAN 

60%

CONV. FAN 

0%

°C

°C

°C

°C

°C

°C

°C 100°C 70°C

°C

✩WITHOUT PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

100%

90%

80%

70%

70%

60%

50%

40%

30%

20%

✩WITH PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

90%

70%

60%

50%

50%

50%

50%

40%

30%

20%

COOLING FAN

60% 60min, then 100%

CONV. FAN

100%

0%

°C 230°C 220°C 200°C 180°C 160°C 130°C 100°C

°C

°C

✩WITHOUT PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

100%

90%

80%

70%

70%

60%

50%

40%

30%

20%

✩WITH PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

90%

70%

60%

50%

50%

50%

50%

40%

30%

20%

MICRO

10%, 30%, 50%

COOLING FAN

100%

CONV. FAN

100%

0%

R86STM

5 – 4

NOTE:

✩The oven temp was checked by the thermometer when each stage is started.
If the oven temp is same or higher than 105

°C, the oven was judged as "with preheating".

When the oven temp is lower than 105

Micro and Top heating element can't be on at the same time.

PREHEAT

Cooling

60% 

CONV. (OVEN)

Cooling fan

60% 60 min. then 100%

Others

Cooling fan

100%

After cooking

Cooling fan

A cooling fan continues the rotation when Oven temperature is more than 120

°C. 

Then, it stops when it is less than 105

°C

Indication

NOW COOLING is indicated during the cooling fan movement after operation is 
finished. (It isn't indicated during a fan movement to stop on the way.)

°C, 230°C, 220°C, 200°C, 180°C, 160°C, 130°C, 100°C, 70°C, 40°C

HEATING ELEMENT 

TOP 100%
BOTTOM

100%

COOLING FAN 

60%

CONV. FAN 

0%

°C

°C

°C

°C

°C

°C

°C 100°C 70°C

°C

✩WITHOUT PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

100%

90%

80%

70%

70%

60%

50%

40%

30%

20%

✩WITH PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

90%

70%

60%

50%

50%

50%

50%

40%

30%

20%

COOLING FAN

60% 60min, then 100%

CONV. FAN

100%

0%

°C 230°C 220°C 200°C 180°C 160°C 130°C 100°C

°C

°C

✩WITHOUT PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

100%

90%

80%

70%

70%

60%

50%

40%

30%

20%

✩WITH PREHEATING

HEATING 
ELEMENT

TOP

50%

40%

40%

30%

20%

10%

10%

10%

10%

10%

BOTTOM

90%

70%

60%

50%

50%

50%

50%

40%

30%

20%

MICRO

10%, 30%, 50%

COOLING FAN

100%

CONV. FAN

100%

0%