Zanussi ZOF3220 사용자 설명서 - 페이지 12

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Principle of heating tube

The following 3 cases of heating tubes are normal

The upper tube works - only the upper tube turns red

The lower tube works - only the lower tube turns red

Both upper and lower tubes work - Both upper and lower

tubes turn red

1. The oven uses intermittent heating to control the temperature of the

cavity. It is normal that the heating tubes turn red and dark during the

working process.

2. The metal heating tubes will show obvious dark red only when the

surface temperature reaches 600°C or higher. If it can work normally,

it is normal that the heating tube does not turn red and it does not

affect normal use.

3. Due to the process characteristics, the U-shaped heating tubes

usually turn red slightly or are not red in working condition, but it is

still in normal working condition.

Upper heating tube

Lower heating

tube

Upper heating tube

temperature control knob

Lower heating tube

temperature control knob