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8.1.8. Airflow Direction
1. There are one types of airflow, vertical airflow (directed by horizontal vane).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature
and intake air temperature) and manual (angles of direction can be adjusted using remote control).
8.1.8.1. Vertical Airflow
Operation Mode Airflow Direction Vane Angle (°)
1 2 3 4 5
Heating Auto with Heat Exchanger A Downward fix 70
Temperature B Downward fix 70
C Upward fix 20
D Upward fix 20
Manual 20 - - - 70
Cooling, Soft Dry and Ion Auto 20 ~ 70
Manual 20 - - - 70
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions
of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position.
8.1.9. Quiet operation (Cooling Mode/Cooling area of Dry Mode)
A. Purpose
To provide quiet cooling operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “quiet” button at remote control is pressed.
Quiet LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. Powerful button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. Quiet button is pressed again.
2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
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CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE