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Hitachi in India

Outdoor Units|Set Free Sigma

Sigma stands for the mathematical sum of Johnson Controls and Hitachi VRF technologies. It is also a shape of the new heat exchanger, designed to have better airflow throughout the machine. The product is made to suit the customer’s requirements of higher efficiency, engineered aesthetics, enhanced strength, compact design, compact cooling and heating etc.

Expandable Product Lineup

Base Module

With Eco Friendly Refrigerant

We have elevated our base model capacity by 133%, that is, from 18 HP to 24 HP. Hence, we are now pioneers in this technology among Japanese brands.

Combination Module

With Eco Friendly Refrigerant

We present to you our new line up combination that provides up to 4 ODUs in a single refrigeration circuit. This gives spectacular ODU capacity of up to 96 HP.

Compact Size

With Eco Friendly Refrigerant

External Static Pressure

High static pressure for outdoor units: can handle up to 80Pa.

With Eco Friendly Refrigerant

Heat Exchanger

With Eco Friendly Refrigerant

  • The heat exchange area has been increased by more than 10% (single module)
  • Greater heat exchange efficiency



New All DC Inverter Scroll Compressor

Introducing new large capacity DC inverter compressor with enhanced performance and noise reduction.
+4.6% Improved Compressor Performance Noise Reduction By 2 dB


Improved compressor efficiency at low load operation optimize oil rate by improving oil distribution to the compressor and expand operation range at low load operation.


Improved Performance of Compressor

Greater Capacity Control

The highly improved performance as well as greater energy saving is achieved by adopting new high efficiency DC inverter compressor, with precise control technology of 0.1Hz which increments inverter frequency. Another feature is the dramatically extended working range, enabled by expanding the compressor’s operating frequency band, both upwards and downwards.

With Eco Friendly Refrigerant

Advanced Compressor Control

Smooth Drive
The model receives information of the required load from individual indoor units. It calculates the appropriate amount of refrigerant required by them and employs smooth drive control to manage the number of revolutions of the inverter compressor, thus supplying the proper amount of refrigerant required to all indoor units. Hence, due to controlled number of revolutions of the compressor at low load operation, the model works smoothly and increases the energy saving efficiency of the unit.

Actual Example of the New Compressor Control

With Eco Friendly Refrigerant

Improved Fan Power

With Eco Friendly Refrigerant

A long bell-mouth is used to supress leakage and effectively operate in wide range. It creates smooth air flow by distributing multipolar vortex and reduces fan input by adopting a multi-stage enhanced structure.

  • Improvement of airflow volume by 23% (single module)
  • Energy consumption in the driving shaft has decreased by 20% on average



Improved Ambient Working Range

Hitachi's new DC Inverter Scroll Compressor is specially designed for the varied Indian climatic conditions. You can now enjoy comfort in your house throughout the year.

With Eco Friendly Refrigerant


Engineered Aesthetics

A new compressor cover has been introduced to reduce the level of sound pressure by up to 2dB(A)

Air Blower:
The air blower has a new structure where it is placed above the heat exchanger, meaning that the noise on the reverse side can be suppressed.

Improved Strength

Rigidity of front and back direction are further improved for less vibration.

Failure Prevention Operation

Rotation Operation
Standardize the running time of the individual outdoor units and distribute the load by rotating the order of operation of the compressors of the outdoor units.

Back Up Funtion
Full introduction of backup operation function. If one outdoor unit should fail, the model can continue to operate using the remaining outdoor units, thereby preventing total system failure.

Maintenance Ease