Air conditioning and refrigeration technology

HVAC/R protection solutions

Climate change and population growth are increasing the need for cooling throughout the world: food, medicines, lab samples must remain cool, as well as in the case of production halls and offices to maintain the productivity of people and machines. The demand for energy efficiency and supply reliability is also increasing. Failures in refrigeration plants are often the result of overheating of the motor, too little lubrication on sliding surfaces and bearings, or of fluctuations in the power supply.

The KRIWAN product portfolio for refrigeration systems enables reliable and comprehensive protection of your system. The data interfaces of the KRIWAN devices allow data to be easily read out and integrated into the higher-level system control.

More Information about our protection solutions for chillers, racks and condensing units

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Discover our product portfolio for air conditioning and refrigeration technology


Refrigeration systems

Heat pumps



KRIWAN has been a competent partner for air conditioning and refrigeration technology for over 50 years. We protect and monitor your compressors and enable reliable and efficient system operation. We offer more than just individual components - with the KRIWAN system solution, consisting of our different devices, the gateways and the INTspector app, you receive all protection and monitoring components from a single source.

Easy to implement, flexible and scalable.

KRIWAN Diagnostic system

With the Diagnose protection system, KRIWAN enables the basic function of safety shut-down and enhances communication
through diagnostic modules. That way, the real condition of the machine can be seen and predictive maintenance undertaken. The KRIWAN Diagnose system can be freely configured and completely networked via integrated interfaces. Today, principles such as permanent condition monitoring and predictive
maintenance through diagnostics and communication are integral parts of the machine protection system.

To provide the right solution for condition monitoring with and for our customers, we develop modules that combine protection and regulation, as well as set up the diagnostic software accordingly. KRIWAN protection controls are designed for other markets, not only for the refrigeration and air conditioning sector.

Diagnostic system 


KRIWAN INTspector app

The KRIWAN INTspector app enables fast and targeted error and status diagnostics on site. You connect the KRIWAN diagnostic device (e.g. INT69 motor protection device, INT280 oil level regulator and others) to the app via a gateway (Bluetooth gateway or USB gateway) and can thus access all important operating data of your pump and parameterize the sensor inputs.

You can use the following functions:

  • Diagnostic data
  • PDF report
  • Data sheets
  • Input blink code
  • Change parameters
  • Send folder
INTspector App

You have further questions? Our experts will be pleased to advise you!


Sebastian Sturm

Key Account Manager

+49 (0) 79 47 - 8 22 - 0

Felix Herrlein

Key Account & Area Sales Manager

+49 (0) 79 47 - 8 22 - 0