How to check the Tiny Cooling Fan fault?

A, "Tiny 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, carefully check the fan during transport 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 "Tiny 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, a variety of materials ready "Tiny Cooling Fan" to install the required tools and venues