Six fault, fault insertion (lockable)


Fully operational Air Conditioning Trainer (AC-0101) with six in-built faults. Allowing student to test and determine common Air Conditioning faults/problems.

Fault 1 

Open circuit in 12 volt supply to Trinary switch relay RL1 inactive


Compressor clutch does not cut in


Fault 2

Open circuit in evaporator fan speed circuit causing the fan not to work on second speed


Second speed of evaporator fan not working


Fault 3

Short circuit causing evaporator fan to run continuously


Evaporator fan will not switch off


Fault 4

Fault in temperature control circuit symptom compressor will not cut out once engaged


Temperature control only works in one position and then will not switch off causing pipe work to freeze back


Fault 5

Condenser fan will not operate, N.B. Trinary switch should cut compressor out between 24 & 26 bar.


Condenser fan not working causing an increase of pressure on the high side and the system is shut down by the trinary switch overload.


Fault 6

Evaporator fan will not operate causing pipe work to freeze back.


Evaporator fan not working causing low side to drop in pressure and temperature control not to operate correctly. Pipe work will also freeze back.


Fault: 7

Close shut off valve to simulate a blocked orifice in the expansion valve.


Valve shut off simulating a blocked orifice, the low side pressure drops to zero and the compressor overloads.