Series Features


Highly Energy Efficiency

Efficiency is improved significantly by using DC twin rotary compressor, inverter technology, and large heat exchanger

New model is for EER-3.45/COP-3.95 EER-3.2/COP-3.4, previous model is 16% up COP EER is up 8%(Heat Pump 6HP). New model is for EER-4.07/COP-4.37 EER-3.2/COP-3.7, previous model is 18% up COP EER is up 27%(Heat Pump 8HP). New model is for EER-3.94/COP-4.3 EER-3.1/COP-3.71, previous model is 16% up COP EER is up 27%(Heat Recovery 10HP).

Energy Saving Function

Room temperature set point limitation

The minimum and maximum temperature ranges can be limited, which provide further energy saving while maintaining the comfort of the occupants.

Difference graph of Set point limitation setting and Original Set Temp.

Economy operation

Economy operation can be set by remote controller.
The temperature setting is offset automatically over a certain period of time.

Economy operation Control Temperature.Heating Set Temperature MAx-4°C,Cooling Set Temperature +2°C.

Auto-off timer

  • The indoor unit automatically is turned off when it reaches to the preset operating time frame.
  • The time frame of the "Auto off timer" can be flexibly scheduled.

Auto-off timer illustration.

Capacity save operation

Operation capacity can be set in 5 steps for rated capability.
The power consumption at peak is cut down and the maximum load is suppressed.

Graph of Capacity save operation.

More Comfort

Precision refrigerant flow control

Precise and smooth refrigerant flow control is achieved by using a DC Inverter control in conjunction with individual indoor unit electronic expansion valve control. This allows high precision comfortable temperature control of ±0.5°C.

Reach the set temperature quickly illustration.

Quiet operation

Two low noise modes can be selected automatically by quiet priority setting and capacity priority setting depending on the indoor environment and outside temperature load.
This feature can be controlled via outdoor unit external input and/or system controller.

Quiet operation illustration.

Auto changeover function

At Auto setting, the cooling/heating mode is automatically switched according to the set temperature and room temperature.

Graph of Auto changeover function.

Suitable for especially Heat Recovery type

Design Flexibility

High capacity connection

8HP-48HP V-II series Heat Pump type Connectable indoor unit capacity range 50 % to 150 %*1,Connectable indoor unit number up to 48.VR-II series Heat Recovery type Connectable indoor unit capacity range 50 % to 150 %*1,Connectable indoor unit number up to 64.4HP-6HP J-II series Heat Pump type Connectable indoor unit capacity range 50 %*2 to 130%*1,Connectable indoor unit number up to 9.

Outdoor unit capacity Maximum connectable indoor unit capacity ratio
Without 1.1kW models With 1.1kW models*3
8HP-48HP 150% 130%
4HP-6HP 130% 117%(J-IIS), 120%(J-II)

*1 :
Conditions of maximum connectable indoor unit capacity ratio is as the chart below.
*2 :
Only 4HP is 46%
*3 :
In the case of connectable indoor units, 1.1kW models and Cassette and / or Duct type of 9.0kW class or more, maximum connectable indoor unit capacity ratio is 110%.

Wide operating range

Installation in extreme temperature conditions is possible due to an increase in operational range.

AIRSTAGE™ J-IIS series Heat Pump type
Cooling -5°C to 46°C. Heating -20°C to 21°C.

AIRSTAGE™ V-II series Heat Pump type
Cooling -15°C *4 to 46°C. Heating -20°C to 21°C.

AIRSTAGE™ J-II series Heat Pump type
Cooling -5°C to 46°C. Heating -20°C to 21°C.

AIRSTAGE™ VR-II series Heat Recovery type
Cooling -10°C to 46°C. Cooling & Heating -10°C to 21°C. Heating -20°C to 21°C.

*4 :
Note : When a multiple outdoor unit connection is used, operating range is from -5°C to 46°C in cooling.

High Reliability

Liquid flow back protection

By adopting a large sized accumulator, not completely vapourised refrigerant stays inside of the accumulator to ensure no liquid refrigerant is being fed into the compressor.

Liquid back flow protection illustration.

Adoption of blue fin heat exchanger

Corrosion resistant of the heat exchanger has been improved by the introduction of blue fin treatment to the outdoor unit's heat exchanger.

Blue fin heat exchanger. Cobalt Blue protection,Standard chromate protection, Aluminium base material, Hydrophilic coating.

Life-extending operation (Not available for AIRSTAGE™ J-II and J-IIS series)

The compressor starting order is rotated so that the running time is shared.

Life-extending operation illustration.

Note: The inverter compressors start in priority. Rotate operation is alternated by the start / stop timing of the compressors

Backup operation (Not available for AIRSTAGE™ J-II and J-IIS series)

If one compressor fails, backup operation will be performed by the remaining compressors*.

* Note: Backup operation may not be possible depending on the trouble state.

Backup operation illustration.

Advanced refrigerant control (Not available for AIRSTAGE™ J-II and
J-IIS series)

Innovative compressor control logic has been introduced in order to balance the refrigerant mass flow rate of each outdoor unit by controlling the inverter speed.

Illustration of Advanced Refrigerant Control.

Easy Installation

Easily transported

Easily craned using lifting belt hooks Design of outdoor unit allows for lifting straps to be used

Transporting by forklift Transport with forklift is possible.

Can be transported in a small elevator

Easy access

Reduced installation intervals by front access. Flexible installation by 4 way pipe direction.

By adopting a L-Shape front panel that can be removed, the work space for installation and service has been significantly expanded by this new design.
For multiple installations, work is performed easily and efficiently even in a narrow space.

Expansion of work space.

Simple wiring work

Installation of the wiring systems is made easier as the communication wiring can be installed continuously between the indoor, outdoor and RB units.

Note: Serial connection can't use the automatic address setting in a multiple refrigerant system.

Up to maximum length 3,600m.

Automatic address setting

The address of the indoor unit, RB unit and signal amplifier through the automatic function setting on the outdoor unit PCB.

Illustration of Automatic address setting.

Easy Service & Maintenance

Design for easy maintenance

Movable PCB panel. Easier for maintenance work behind the PCB

Easy to read 7-segment LED :

Confirm detailed operational and error status without using any specific equipment.

  • Operation mode status
  • Discharge temperature / Pressure status
  • Compressor operation indication
  • Address / type / number of outdoor unit

7-segment LED

Error status can be checked easily via the indoor unit wired controller

An error code is displayed on a liquid crystal screen.

Wired Remote Controller, Simple Remote Controller, Wired Remote Controller (Touch panel).

Error diagnosis by Service Tool

Connection to Service Tool

  • Detail operation status and recent error history can be checked and analyzed by using the Service Tool.
  • Last 5 min. operation memory can be also be recorded.

Remote monitoring

The Web Monitoring system allows you to view system operation anytime over the internet, ensuring issue free operation.

The operating VRF network system in the building can be monitored real time over the Internet.

Monitoring Side, VRF Network System Side,


Top of Page