How to check the 220V Cooling Fan fault

A, "220V Cooling Fan" in front of the box should check the packaging is intact, the fan parameters are met, each comes with complete accessories are complete.
B, double-check "220V Cooling Fan" in transit without deformation or damage, fasteners are loose or fall off, if there is a collision phenomenon impeller, and inspect the various parts of the fan. If found abnormal, should be repaired before use.
C, detection 500V megger "220V Cooling Fan" motor winding insulation resistance between the shell and its value should be greater than 0.5 megohms, or deal with the motor windings powerful horse for drying, when drying temperature must not exceed 120 ℃.
D, ready for fan installation for all kinds of materials, tools and venues.