When the switch is turned on, one exhaust fan is not spinning. Both the power supply and capacitor have been tested and are functioning correctly. After removing the fan motor and conducting resistance checks, it was discovered that two wires showed a full swing on a test lead, while one wire did not show any movement. It is essential for all three wires to show a full swing for the motor to rotate properly. Further inspection revealed that all three wires showed a full swing when a test lead was placed between the end of the winding wire and the power supply cable. However, upon closer examination, it was found that an electrical device (possibly a fuse) near the tip of the power supply cable wire was faulty and preventing the motor from spinning. Attempting to bypass this device by connecting the winding wire directly to the power cable did not resolve the issue. This raises the question: why is the motor still not rotating?
What kind of motor is it? Could you provide the nameplate information for this motor?
It sounds like you've done a thorough job troubleshooting! Given that the motor isn't spinning even after bypassing the suspected faulty device, it's possible there could still be an issue within the motor itself, such as a short circuit or a damaged winding. Sometimes, you might not see any obvious physical damage, but internal problems can prevent the motor from receiving the proper voltage. It might be worth checking the motor's commutator and brushes, as worn brushes can lead to insufficient electrical contact, causing the motor to fail to start. Have you also tested the motor with an alternate power source, just to rule that out?
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Answer: Answer: The motor may still not be rotating due to a faulty electrical component, such as a fuse, near the power supply cable wire that is impeding the motor's operation.
Answer: Answer: All three wires in a motor must show a full swing during resistance checks to ensure that the winding wire is properly connected and there are no faults preventing the motor from functioning correctly.
Answer: Answer: If bypassing the faulty electrical device does not solve the problem, further inspection and testing of other components in the motor system may be necessary to identify the root cause of the rotation issue.
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