When the air cooler fan is operating, it exhibits a phenomenon similar to surging, with a loud humming sound that occurs intermittently

2021-10-18View Original

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I need help figuring out what problem this phenomenon is

Reply #22021-10-18

Poor balance of fan blades, misaligned drive belts, resonance with other equipment, etc.: D

Reply #32021-10-18

“There is a phenomenon similar to surge, with a loud hissing sound that comes and goes – this is surge.

Reply #42021-12-30

Vibration could also be caused by excessive shaft power and high current!

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When the air cooler fan is operating, it exhibits a phenomenon similar to surging, with a loud humming sound that occurs intermittently

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