How to maintain the screw air compressor?

1. The cooler shall be dust cleaned at least once a week. 2. The air filter needs to be removed for dust removal after working every day. 3. Check whether there is abnormal oil emission, oil dripping and oil leakage around the air compressor. 4. Check whether the operating parameters are within the working range before working every day. 5. Drain the residual water in the air compressor, freeze dryer, precision filter and air storage tank before or after the work every day.