1. When cleaning the wet curtain air cooler, completely disconnect the main power supply of the air cooler, and hang the "Maintenance, do not use" brand on the control switch to avoid the danger caused by the wrong startup.

2. When cleaning the wet curtain cold air machine, be careful to remove the wet curtain. When washing, the water pressure should not be too high to prevent the wet curtain from being damaged, and no corrosive chemicals should be put to avoid the corrosion of the wet curtain.

3. It is necessary to fasten the safety belt when working at height to ensure safety.