5
High
Med.
Low
High
time
Rotational frequency
AUTO
Horizontal
Middle
Downward
Swing
6. 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, which are approximately 12V and transmitted from microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
2. COOL (
) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select COOL mode with OPERATION SELECT button.
(3) Set TEMPERATURE buttons.
Press TOO WARM or TOO COOL button to select the
desired temperature.
The setting range is 16 ~ 31°C.
✻
Indoor fan continues to operate regardless of thermostat’s
OFF-ON at set speed.
✻
Coil frost prevention is the same as COOL mode of
“I FEEL CONTROL”.
3. DRY (
)OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on
with a beep tone.
(2) Select DRY mode with OPERATION SELECT button.
(3) The microprocessor reads the room temperature and
determines the set temperature. Set temperature is as
shown in the right chart.
Thermostat does not work.
The other operations are same as DRY mode of
“I FEEL CONTROL”.
(4) DRY operation will not work when the room temperature is
13°C or below.
4. FAN (
)OPERATION
(1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.
5. FAN MOTOR CONTROL
(1) Rotational frequency feedback control
The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to
feedback the rotational frequency. Comparing the current rotational frequency with the target rotational frequency
(High, Med., Low), the microprocessor controls SR141 and adjusts fan motor electric current to make the current
rotational frequency close to the target rotational frequency. With this control, when the fan speed is switched, the
rotational frequency changes smoothly.
(2) Fan motor lock-up protection
When the rotational frequency feedback signal has not output for 12 seconds, (or when the microprocessor cannot
detect the signal for 12 seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut
off. 3 minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, OPERATION
INDICATOR lamp flashes on and off to show the fan motor abnormality.
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