How to slow down the fan speed of RG-S5310-48GT4XS-P-E?

Sorry, RG-S5310-48GT4XS-P-E does not support adjusting the fan speed manually. Nevertheless, the entire RG-S5300-E series are equipped with variable-speed axial fans to intelligently control the fan speed based on ambient temperature, which reduces power consumption and noise while ensuring stable operation of the devices.

I started using Ruijie networking products in my system. I'm currently using two different models in my system: RG-S5310-48GT4XS-P-E - RG-S5310-24GT4XS-P-E. These devices are the power supply models I use.  
RG-PA1000I-P-F
RG-PA600I-P-F

When I tested two power supply models, both models are on the switch. I found the RG-PA600I-P-F model power supply to be very noisy. There are no ports connected to the devices and there is no load on the devices. I tried it in the same region and place. room temperature is 28 degrees.           The RG-PA1000I-P-F power supply operates normally, there is no fan noise or turbo fan noise as it should. But

Even though there is no load on the RG-PA600I-P-F switch and no port is connected, it goes in and out of turbo mode on its own, which creates excessive noise. room temperature is 28 degrees. and these 2 power supplies were operated at the same room temperature.

As far as I observed, different brands of fans are used in PA-600.
I can't read the exact make and model. I do not recommend using this fan in new power supply units.

I wish you to use the fan brand and model that you use in 1000 watt power units in 600w power supply units.

Since the RG-PA600 room temperature is at normal levels, the device temperature is at normal levels and the CPU usage rate is 10% and the memory usage rate is 51%.
The device is idle without any load. but it goes in and out of turbo mode unusually.     I currently have 6 RG-PA600 power supply products and they are all the same. The environment is normal, the fans are unusually loud and spontaneously switch to turbo mode.