If the unit is operating in cooling mode, the outdoor fan motor is not operating, and all other loads are operating properly, what could be the problem? a. bad defrost relay contacts b. bad contactor c. blown fuse d. bad transformer

If the unit is operating in cooling mode, the outdoor fan motor is not operating, and all other loads are operating properly, what could be the problem? a. bad defrost relay contacts b. bad contactor c. blown fuse d. bad transformer

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter10: System Protection

Section: Chapter Questions

Problem 10.27P

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Concept explainers

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

If the unit is operating in cooling mode,
the outdoor fan motor is not operating,
and all other loads are operating
properly, what could be the problem?
a. bad defrost relay contacts
b. bad contactor
c. blown fuse
d. bad transformer

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