Air-cooling classification
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Air cooling is divided into forced-air type and induced-air type; from what I remember, the fan is of the forced-air type when it is located below the medium tube box, and of the induced-air type when it is located above the medium tube box. The unit is equipped with an air-cooling system of the blower type; currently, it seems that the wind is blowing downward from the air cooler, and it is suspected that the fan blades are installed in the wrong direction. Is this correct?
It’s also possible that the motor is reversing direction :)
The probability of the blades being installed in the wrong direction is low; it’s likely that the motor on site is reversed. This happens frequently on site
I’m not sure what type of fan you have. If it’s a centrifugal fan, air will be blown out in both forward and reverse directions; generally, the airflow in reverse direction is weaker, but there shouldn’t be a situation where the airflow changes from supply mode to exhaust mode