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• When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure

below:

• This control is to enable cooling operation when outdoor ambient temperature is low.
• Control start conditions:

- Cooling operation is activated with compressor ON.
- Outdoor ambient temperature is less than 15

°C

• Control contents:

- When the above conditions are fulfilled, based on outdoor pipe temperature, the outdoor fan motor will operate according to

figure below:

• To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for 2 minutes will be

activated every 35 minutes under designated fan speed.

• Control stop conditions:

- When either one of the start conditions are not complied.

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• When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to

figure below:

• To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped capability

supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send signal to all thermo-off indoor
units to ON fan motor and get room temperature sample.

• To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of heating thermo-off

units, the outdoor fan speed will be adjusted accordingly.

• However, if indoor room temperature is high compare to remote control setting temperature, sampling of corresponding indoor

unit will be cancelled.

• During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled indoor unit by

temporary stop the capability supply to low load demand indoor units.

• Operation start condition:

- Powerful operation ON for targeted indoor unit

• Operation content:

- If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for 1 minutes after

received powerful command from indoor unit, then capability supply to other indoor units are stopped for minimum 3 minutes.
Capability supply stop period follows powerful operation period.

• Operation stops when comply either one of the following conditions:

- When other indoor units (where Powerful operation are OFF) is lower than setting temperature.
- When the powerful operation is OFF for all indoor units.
- When Quiet operation received from 1 indoor unit.
- When protection control starts.

• During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal operation.
• Operation start if all condition below are complied:

- Powerful operation ON for indoor unit.
- Not under Annual Cooling control.

• Operation content:

- Outdoor fan speed will adjust automatically.
- Compressor frequency will adjust automatically.

• Operation stop when comply either one of the follow conditions:

- When the powerful operation is OFF for all indoor units.
- When annual cooling control activated.

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1. Operation modes which can be selected using the

remote control unit:
Automatic, Cooling, Soft Dry, Heating, e-ion operation
mode.

2. Types of operations modes which can be performed

• Cooling operation and cooling, Soft Dry or e-ion

operation

• Heating operation and heating operation

3. Types of operation modes which cannot be

• While a cooling operation is in progress, a heating

operation cannot be performed by an indoor unit in
another room.
In the room where the operation button for cooling was
pressed first, the operation is continued. In the room
where the operation button for heating was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the heating
operation. Its fan is stopped, and the air does not
discharged.

• While a heating operation is in progress, a cooling

operation cannot be performed by an indoor unit in
another room.
In the room where the operation button for heating was
pressed first, the operation is continued. In the room
where the operation button for cooling was pressed
afterward, the operation lamp of the indoor unit blinks,
where the attempt is made to establish the cooling
operation. Its fan is stopped, and the air does not
discharged.

4. Operation mode priority control

• The operation mode designated first by the indoor unit

has priority.

• If the priority indoor unit stops operation or initiates the

e-ion operation, the priority is transferred to other
indoor units.

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• When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat

exchanger temperature.

• When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.

• When received dew prevention signal from indoor unit, the compressor frequency changes according to indoor intake

temperature and indoor heat exchanger temperature.

• This control prevents electronic parts temperature rise during cooling overload condition.
• Start conditions:

- Outdoor ambient temperature is at protection region as shown in figure below:

- Outdoor unit total current is above 5.5A

• Control content

- Outdoor fan speed is adjusted accordingly.

• Control stop condition

- When outdoor ambient temperature is back to normal region.

• During this control, outdoor fan speed does not reduce for Quiet operation.

• This control prevents electronic parts temperature rise during cooling/dry operation.
• Start conditions:

- Total current is at protection region as shown in figure below:

• Control content

- Outdoor fan speed is adjusted accordingly.

• Control stop conditions

- When total current is back to normal region.

• During this control, outdoor fan speed does not reduce for Quiet operation.