Automotive Air Conditioning Trainer 39-305

Feedback's range of refrigeration and air conditioning products provide an ideal platform for students to gain a thorough understanding of the subject by means of practical experimentation.


  • Uses actual automotive components
  • Suitable for both technician and vocational teaching
  • Portable design
  • Uses non-ozone depleting HFC refrigerant
  • Enables hands-on access to all components
  • Simulates four common faults
  • Variable speed motor simulates car engine
  • Available for either 110V or 230V mains connection

    Have you ever wondered how the air-con system in your car actually works? Feedback Instruments' automotive air conditioning trainer enables students to find out how a typical system works whilst learning the principles of refrigeration. By using authentic components, students learn how to perform fault finding and servicing using a safe and accessible system. The product has been designed specifically with hands-on training in mind and it can also be used by students to perform the safe recovery and recharging of refrigerant.

    It is now uncommon to come across new vehicles which do not have any form of air conditioning and as a consequence the requirement for serving and repair of such systems has grown considerably. Feedback Instruments' automotive air conditioning trainer is a complete, authentic vehicle air conditioning system mounted on a convenient, portable frame. The unit incorporates all of the components that would typically be found on a modern vehicle air conditioning system, with particular attention having been made to making all parts visible and accessible to students. A digitally controlled electric motor simulates the vehicle engine, therefore making the unit ideal for the classroom training environment, without the need for ventilation or fume extraction equipment.

    The system is an example of a refrigeration circuit from which the basic vapour-compression cycle can be studied. This process entails the circulation of a refrigerant medium that is forced to change state in the evaporator by expansion from a liquid through to a superheated gas. During this phase of change, large amounts of heat energy are absorbed into the refrigerant, which is then pumped round and rejected to atmosphere through the condenser.

    Complete with compressor, condenser, receiver dryer, expansion valve and evaporator, the unit is pre-installed with R134a type refrigerant which is an HFC non-ozone depleting gas and is in line with global emissions guidelines. The system is furnished with high and low-side pressure service ports that facilitate easy connection of a gauge set or for the recovery and re-charging of refrigerant. These ports are typical quick coupler type as would be found on modern vehicles.

    The speed of the motor which simulates the vehicle engine is variable by means of an electronic, digitally controlled three-phase inverter drive. This enables the demonstration of the effect that compressor speed has on the system performance. The system is designed to be bench mounted and run from either a 230V or 110V ac supply. There is a 12 volt dc output socket which enables the connection of ancillary equipment, such as a UV leak detection lamp.

    The provision of a sight glass enables students to observe the state of the refrigerant in the high pressure side of the system. This assists with the diagnosis of four simulated common faults which can be applied by the instructor. The following four simulated faults can be applied by setting the fault switch on the main control panel:

  • Blocked TEV (Thermal Expansion Valve)
  • Blocked receiver drier*
  • Faulty valve plate
  • Unit under condensing
    The student will observe the effect of the faults by monitoring system pressures (using optional manifold gauges) changes in the cooling duty, observing changes on the digital thermometer and observing the state of the refrigerant in the sight glass. A high pressure cut-out switch shuts the compressor down if the high side pressure becomes abnormally high.
  • Additional pictures

    Automotive AC Control

    Automotive Air Conditioning Trainer 39-305-1

    Instruments Techno Test inc.

    Instruments Techno Test inc.
    2345, Michelin street, #100
    Laval, Qc
    H7L 5B9

    Téléphone : (450) 681-5777
    Télécopieur : (450) 681-3773

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