Releasing a next-generation variable refrigerant flow air conditioning systems designed for buildings that saves energy, construction time, and installation space!

Hitachi has developed the new FSN6Q Series series to meet the increasing requirements and complex operating conditions of intelligent building air conditioning. FSN6Q Series comes to you with higher cooling capacity, unique safety features, lower power consumption and lower operating costs.

  • Wide Product Range
     6 types base modular unit and combination of 24 capacity outdoor units.
     9 types80 models.
  • Inteligent Control System

Adopts latest technologies

  • Newly-developed, Highly-efficient 2-blade-Inverness Fan
  • High-efficiency Fan Module
  • Vector-control DC Inverter
  • High-efficiency DC Inverter Compressor
  • High-efficiency, Constant-speed Compressor
  • Large-capacity DC Fan motor
  • Newly-developed, Energy-saving Heat Exchanger
  • Supercooling Circuit

The Hitachi Patented High Efficiency Scroll Compressor

  • Anti-overcompression Technique
  • The Originated 2-Stage Oil Sparating Technique Improves Reliability of System

The Hitachi Patented Precise Inverter Technique

The operating speed of DC motor in compressor can be adjusted continuously in 1Hz increment and freely relating to the variability of system capacity. This technique integrated with auto-adaptive control technique automatically adjusts capacity output according to actual air conditioning load in order to achieve a smoother curve of temperature fluctuation.

Heat Exchange Efficiency

25-step Fan Speed Control

The DC variable-speed motor is adopted in outdoor unit, which results in effciency promotion and power input reducation. The outdoor fan speed can be adjusted by 25 steps.

New Efficient Heat Exchanger

"2 in 1" Refrigerant Circuit

Improvement of Heat Transfer

Two-stage Super-cooling

A sub-cooling section in the heat exchanger of outdoor unit is designed to realize the first-stage super-cooling. Furthermore. a high efficient recooler is applied to archieve the second-stage super-cooling.

1. Two-stage Super-cooling Cyclic Graph
2. Two-stage Super-cooling Pressure-enthalpy Graph
  • Two-stage super-cooling circulation enhances cooling capacity
  • Pressure loss of refrigerant flowing in pipe is reduced
  • Improved undercooling contributes to stable operation of EEV
  • Improved undercooling allows extension of total piping length.

Various Controllers

Remote Control Switch

Wireless Remote Control Switch

Central Station


DX Computer Controlled Network System

Central Station DX is a powerful computer controlled network system with easy operation which can monitor and control utmost 1024 outdoor units and 2560 indoor units through H-LINK II connection.

Building Management System

Compatible to multiple communication protocol of Lonworks. BAXnet. RS-485 etc. Connectible to BMS or Smart Home System.

  • Real-time operation status monitoring for inquiry
  • Operation order from monitoring center

Maintenance - All - directional Maintenance and Service

  1. Self-diagnosis and Intelligent Operation Inspection

    Through remote controller or 7-segment LED displays on Outdoor units, self-diagnosing error code and information can be easily got to monitor the system operation status which makes both operation management and maintenance more convenient.

  2. Automatic Simple Judgement System for Refrigerant Amount
  3. Double Back-up Operation Function
  4. Automatic Reset Function