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Single Split PAC/AHU Controller

Air Handling Unit Interface - AHU-KIT-SP

The AHU controller will function as an interface between MHI's PAC outdoor units and locally produced heat exchanger for Air Handling Unit (AHU).

  • Compact AHU interface for MHI’s Split system
  • 0-10V/4-20mA capacity control
  • Various external I/O
  • Modbus connection
  • Cascade control
  • Set temperature control

Main components


Main functions


Compatibility PAC & RAC – outdoor unit will be in scope.




System Examples & Advantages



Ex1. General AHU

The RC-EX3A controller enables extensive access to service and maintenance data combined with easy to use full dot LCD back light display. All settings are changed by tapping the touch screen panel.

  • 0-10V/4-20mA capacity control
  • Various I/O for better control
  • R/C can be removed

Compatible with market standard AHU controller. Provide wide flexibility for AHU solution.




Ex2. Modbus AHU

The RC-EX3A controller enables extensive access to service and maintenance data combined with easy to use full dot LCD back light display. All settings are changed by tapping the touch screen panel.

  • Modbus connection
  • Same control as external I/O

BMS connectability without any extra device.




Ex3. Simple AHU

The RC-EX3A controller enables extensive access to service and maintenance data combined with easy to use full dot LCD back light display. All settings are changed by tapping the touch screen panel.

  • Remote contoller connection
  • Adequate external input/output

Simple stand-alone AHU control by set temperature control from RC.




Big capacity AHU

Cascade control provides wide range of AHU capacity with small footprint. Multiple outdoor unit increase system reliability and efficiency.

We are currently experiencing technical issues with our Smart M Air App

For those of you who are still experiencing technical issues with our Smart M Air App, please update the app to the latest version via Google play (for Android) or Apple store (for iOS).