LG MH-2388NBC Owner's Manual page 15

In the following example I will show you how to programme your oven with combi mode Co-3 for a cooking time
of 25 minutes.
Your oven has a combination cooking
feature which allows you to cook food
with heater and microwave at the same
time or alternately. This generally means
it takes less time to cook your food.
The sheath heater grills the surface of
the food while microwave heats inside.
Moreover, preheating your oven is not
necessary.
Press STOP/CLEAR .
Press COMBINATION to select the Combi-3 mode.
Turn DIAL until display shows "25:00".
Press START.
Be careful when removing your food because the container will be hot!
Combination Cooking Mode
CATEGORY MICRO POWER (%)
Co-1
Co-2
Co-3
15
HEATER POWER (%)
20
40
60
Combination
Cooking
80
60
40