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SMXht Control Systems

Digital Control for Self-Contained & Tempered Water Air Conditioning Systems

The SMXht keypad/display is a microprocessor-based controller designed for the precise monitoring of self-contained and remote direct expansion air conditioning systems in marine environments.

It is designed for use with the SMX II-HV power/logic board, operable on both Direct Expansion and Chilled Water systems.

The SMXht keypad/display has a sleek, modern Euro design. Available in grey or white, it features raised buttons for easy access and control. Decorative snap-on bezels are available in Vimar® Idea or Gewiss® Playbus styles, and a variety of colors and materials to match your vessel’s interior.


  • SMXht offers many great features. Line voltage and refrigerant high and low pressure switches are constantly monitored.
  • If a problem is detected, the system will shut down and display a fault code on the keypad/display.
  • A nonvolatile memory retains current operation mode and all programmable settings when power is turned off.
  • Complete system monitoring on both DX and TW systems.
  • Automatic humidity control – reduces moisture when the boat is unattended.
  • Multiple fan speed selections – automatic or manual speeds.
  • Blank the lit display when desired – keep cabin dark at night.
  • Supports auxiliary heat for TW systems.

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