Mitsubishi Electric MSZ-D30NA Service Manual page 15

8-7. AUTO VANE OPERATION
1. Horizontal vane
(1) Vane motor drive
These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approx. 12 V) transmitted from indoor microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
(3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the selected
angle.
(a) The operation starts or finishes (including timer operation).
(b) The test run starts.
(4) VANE AUTO ( ) mode
The microprocessor automatically determines the horizontal vane angle and operation to make the optimum room tem-
perature distribution.
COOL and DRY operation
FAN operation (MSY)
Vane angle is fixed to Angle 1.
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(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) OPERATE/STOP (ON/OFF) button is pressed (POWER OFF).
(b) The operation is stopped by the emergency operation.
(c) ON TIMER is ON standby.
(6) Dew prevention
During COOL or DRY operation with the vane angle at Angle 4 ~ 5 when the compressor cumulative operation time
exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention.
(7) SWING ( ) mode
By selecting SWING mode with VANE CONTROL button, the horizontal vane swings vertically.
(8) Cold air prevention in HEAT operation (MSZ)
The horizontal vane position is set to Upward.
(9) ECONO COOL (
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 3.6 °F (2 °C) higher.
Also the horizontal vane swings in various cycle.
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air
conditioner can keep comfort. As a result, energy can be saved.
ECONO COOL operation is cancelled when ECONO COOL button is pressed once again, when the VANE CONTROL
or POWERFUL button is pressed, or operation mode is changed.
(10) POWERFUL ( ) operation.
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode.
The POWERFUL mode is cancelled automatically 15 minutes after operation starts, or when POWERFUL but-
ton is pressed once again within 15 minutes after operation starts. The operation mode returns to the mode prior to
POWERFUL operation. POWERFUL mode also is cancelled, when the ECONO COOL or FAN SPEED SELECT button
is pressed within 15 minutes after operation starts, or operation mode is changed.
) operation (ECONOmical operation)
HEAT operation (MSZ)
Vane angle is fixed to Angle 4.
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