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ELECTRICAL FAULTS IN SIMPLE AIR CONDITIONING SYSTEMS

Identifying electrical faults in air conditioning systems requires comprehensive knowledge This knowledge includes the design and operation of the individual electrical components as well as the reading of circuit diagrams. Helps to acquire this knowledge.

Demonstrates the electrical circuit of a simple air conditioning system, consisting mainly of a refrigerant compressor and fan at the air cooler. The control circuits are actually present.

Compressor and fan motor are simulated. The compressor is controlled via a thermostat. Via a ballast the fan motor speed can

be switched in two stages. The start of the compressor motor takes place via a start-up relay and start-up capacitor. Typical

protection devices, such as circuit breaker, complete the electrical circuit. The operating state of the simulated components compressor and fan is indicated via lamps in the circuit diagram on the front panel. The simulation of 15 different faults, such as coil fracture in the motor or faulty switching contact, is possible. For fault indication, voltages and resistances are checked at the lab jacks with the multimeter. The depiction of the circuit diagram on the front panel facilitates the allocation of the

measuring points.

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

Electrical design and principle of operation of
Simple air conditioning systems
Read and understand electrical circuit diagrams
Design and operation of electrical components in
An air conditioning system
Start-up capacitor
Start-up relay
Overheat protection
Main contactor
Automatic fuse
On/off switch
Speed switch
Thermostat
Fault finding in electrical components
In idle state
Under mains voltage

Specification

Experimental unit from the practical series for the training of mechatronics engineers for refrigeration
Simulation of the electrical circuit of a simple air conditioning system for cooling
Real control circuits with electrical components, simulated load circuits
Electrical simulation of compressor and fan
Temperature control with thermostat and compressor
Fan with 2 adjustable speeds
Operating states of the simulated components indicated via lamps in the circuit diagram
Circuit diagram depicted on the front panel
Identification of 15 faults: multimeter measures voltages or resistances at the lab jacks

Technical Data

Simulated compressor
Start-up current: > 3A
Electrical components for the compressor
Start-up capacitor
Start-up relay
Overheat protection (bimetallic)
Electrical components for the fan
On/off switch
Speed switch
Thermostat: -5...35°C
General safety devices
Main contactor
Automatic fuse

Dimensions and Weight

LxWxH: 900x400x650mm
Weight: approx. 30kg

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Electrical Faults In Simple Air Conditioning Systems

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