Condensing Unit Controller

The CO2 condensing unit controller with built in support for up to two rooms/evaporators offers innovative control strategies to ensure optimal energy efficiency. Webpages for user interaction and a direct cloud link comes as standard.



Reviews Contact Reftronix

The CO2 condensing unit controller from Reftronix offers:

  • Energy efficient system controls 
  • One or two stage compressor
  • Validated with GMCC, Toshiba, Bitzer, Dorin, Siam, and Panasonic compressors
  • Fully integrated Invertek inverter
  • Integrated room/cabinet control for up to two evaporators
    • Electronic Expansion Valve
    • Fan control
    • Defrost control
    • Door Switch 
    • Display available
    • Wired directly to main Controller
  • Can be customized and branded according to our customers’ requirements

Built in controller webpage

  • Support for both PC and Mobile device
  • Connect using Ethernet or Wi-Fi Hot-Spot
  • Live Process Diagram
  • Live Compressor Map
  • Used as Commissioning Tool
  • New Firmware Upload
  • Database Backup for storage/copying to other controllers
  • Language Support (English, French, and German)

Cloud link for monitoring and analytics

  • Secure and IT friendly connection
  • Google cloud meaning unlimited Data Storage
  • Controller data send to the cloud every 5 Sec
  • Change Log. Who changed what and when
  • User Management
  • Data Graphing with alarm timestamps
  • Full Controller Access, like the local webpage
  • Alarm Management
Equipment focus

Condensing unit controller

Metrics controlled

Process and room/case control



Remote monitoring

Yes, Reftronix Cloud solution, Dixell Xweb and Danfoss System Manager SM8xx.

Proprietary or open architecture

Open architecture

Valves controlled

Total of 4. High Pressure valve, receiver valve and up to two electronic expansion valves for the evaporator(s). Support of both unipolar or bipolar coils.

Variable-speed control

Yes. Variable speed control of the compressor using an inverter

Automatic fault detection

Yes. Advanced alarm/warning/fault detection and recovery mode.

Communication type

Ethernet port, Wi-Fi access point, RS485 Modbus port for BMS systems.

Power consumption

Max 40 VA @ 24V and 30 VA @ 240V

Operating temperature range

-20-60 °C, 90% RH non-condensing

Type of sensor

NTC Temperature sensors and ratio metric pressure transducers (0 to 5 V) or (4 – 20mA).


UL Pending


, , , , , ,


This Controller is really great. The User Interface is web-based and really easy to configure. If you want to go more into detail of the plant you have endless options of changing parameters. We had especially a look at the integrated expansion valve driver – worked really fine with our evaporators. Stable low superheats, like it should be. – Andreas Binder, Walter Roller GmbH


There are no reviews yet.

Product Enquiry