Question 132Refrigeration/AC - Assistant Engineer70% to pass
When a refrigeration compressor motor fails to start, the FIRST thing that should be checked for is what?
AI Explanation
The correct answer is A) blown fuse or tripped circuit breaker in the motor circuit.
When a refrigeration compressor motor fails to start, the first thing that should be checked is the power supply to the motor. A blown fuse or a tripped circuit breaker in the motor circuit is the most common cause of a compressor motor not starting. This is because the motor requires a steady power supply to operate, and any interruption in that supply will prevent the motor from starting.
The other options (B, C, and D) are less likely to be the immediate cause of a compressor motor failure to start, as they are more related to issues with the refrigeration system itself, such as problems with the suction pressure regulator, expansion valve, or high-pressure cutout.
Related Questions
#130 Moisture in a refrigeration system can cause which of the following conditions? #131 If a refrigeration compressor had developed a slightly high suction pressure accompanied with an abnormally low suction temperature, the problem could be a result of which of the following? #133 In a low-pressure refrigeration system, excessive running of the purge recovery unit generally indicates which probable condition? #134 If the refrigeration compressor crankcase is sweating or frosting and is operating with an unusual noise, what is most likely the cause? #135 If a refrigeration system were short of refrigerant, besides an elevated box temperature, what would be an observable symptom?