Mitsubishi Electric M Series Manual page 269

M series FLOOR-STANDING MFZ-KA VA Series
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( f ) The horizontal vane automatically moves in certain intervals to determine its position, and then it returns to set position.
When the upper air outlet is selected
with an air outlet selection switch,
vane angle is fixed to Angle 5.
When the upper and lower air outlets
are selected with an air outlet selection switch,
vane angle is fixed to Angle 3.
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