Mitsubishi Electric MSZ-FD09NA Service Manual page 16

(10) POWERFUL ( ) operation.
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode.
The POWERFUL mode is automatically released 15 minutes after operation starts, and the operation mode returns to
the mode prior to POWERFUL operation
2. Vertical vane
(1) Vane motor drive
These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the
motor are controlled by pulse signals (approx. 12 V) transmitted from microprocessor.
(2) The vertical vane angle and mode change as follows by pressing WIDE VANE button.
(3) Positioning
The vane presses the vane stopper once to confirm the standard position and then set to the desired angle.
Confirming of standard position is performed in the following cases.
(a) OPERATE/STOP (ON/OFF) button is pressed (POWER ON).
(b) SWING is started.
(4) SWING MODE (
By selecting SWING mode with WIDE VANE button, the vertical vane swings horizontally.
The remote controller displays " ". Swing mode is cancelled when WIDE MODE button is pressed once again.
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(SWING)