Outdoor Fan Motor Control; Auto Vane Operation - Mitsubishi Electric MSC-CA20VB Service Technical Manual

11-6. OUTDOOR FAN MOTOR CONTROL

Fan speed is switched according to the compressor frequency.
Fan speed
Down
High
Low
Min. Compressor frequency
<Relation between compressor frequency and fan speed>
Mode
COOL
HEAT

11-7. 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. 12V) transmitted from indoor microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
(3) Positioning
The vane presses the vane stopper once to confirm the standard position and then moves to the set angle.
Confirming of standard position is performed in case of follows.
(a) When the operation starts or finishes (including timer operation).
(b) When the test run starts.
(c) When multi-standby starts or finishes.
(4) VANE AUTO ( ) mode
The microprocessor automatically determines the vane angle and operation to make the optimum room temperature dis-
tribution.
COOL and DRY operation
Vane angle is fixed to Horizontal position.
Horizontal
position
(5) STOP (operation OFF) and ON-TIMER standby
When the following cases occur, the horizontal vane returns to the closed position.
(a) When OPERATE/STOP (ON/OFF) button is pressed (POWER OFF).
(b) When the operation is stopped by the emergency operation.
(c) When ON-TIMER is ON standby.
(6) Dew prevention
During COOL or DRY operation with the vane angle at Angle 2 ~ 4 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. The remote controller
displays " " . SWING mode is cancelled when VANE CONTROL button is pressed once again.
Up
Max.
Fan speed Compressor frequency(Hz)
Up
Down
Up
Down
)
44
33
44
33
HEAT operation
Vane angle is fixed to Angle 4.
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