SMX II Controls For DX Remote & Self-Contained Systems (Air)

The SMX II is a microprocessor-based electronic control for use with Cruisair's DX Remote & Self-Contained Systems (Air) which include mobile and marine applications. It can be retrofitted in the field to replace any of the Cruisair electromechanical switch assemblies.

The SMX II has a noncorrosive ABS cover and soft-touch membrane switches. All keys are clearly labeled, making operation easy. The large, easy-to-read digital display shows setpoint or cabin temperature and also is used to give information on operating parameters and fault code warnings. Small LEDs are used to indicate system status. Switchplates are available in black, brown, white or beige and must be ordered separately. For normal operation, it is only necessary to turn the system on and select the desired setpoint. The user can select cooling only, heating only, or automatic changeover between cooling and heating. Fan speed is automatically controlled, or can be manually set.

Factory settings may be changed, with user-programmable commands, permitting the user to fine-tune the system for personal preferences. Programming modes are accessed by pressing special combinations of keys. Programming features Include: AC line voltage calibration, temperature calibration, compressor restart time delay, continuous or intermittent fan operation, low and high fan speed adjustment, compressor response differential, Fahrenheit or Celsius temperature display, and dehumidification.

The system's nonvolatile memory retains all user-programmed settings, even when the power is switched off. The SMX II constantly monitors line voltage and refrigerant pressures. Whenever out-of-tolerance conditions are sensed, the SMX II computer displays a visual warning and shuts the system down to prevent damage. Software upgrades for the SMX II controls are released periodically by Cruisair, and new software can be installed in the field by exchanging plug-in EPROMs.

The dehumidification program ensures the coach stays dry, even when no one is aboard, eliminating mold, mildew and odor.