Huanyang 2.2kw fan direction question

[Voicecoil]

Dunno - poor design maybe?. I was always taught to blow air into an enclosure for cooling, since the +ve pressure reduces the build up of dust, and if the thingy to be cooled is close to the fan you can benefit from the very turbulent air that comes out of the fan. I'm pretty sure my VFD has a fan (or maybe 2 little ones) in the bottom.

[marbles]

Dunno - poor design maybe?. I was always taught to blow air into an enclosure for cooling, since the +ve pressure reduces the build up of dust, and if the thingy to be cooled is close to the fan you can benefit from the very turbulent air that comes out of the fan. I'm pretty sure my VFD has a fan (or maybe 2 little ones) in the bottom.

Yeh my XSY-AT1 VFD's have a fan on the bottom that blows air up, through and out the top the. The 3kw Huangyang has a top mounted fan that blows air down but the top mounted fan on my 2.2kw Huangyang blows air up?

[Voicecoil]

Maybe the fan in your 3KW was mounted back to front by accident during manufacture? It certainly can't be the best idea as the hot air blown out the bottom would tend to rise to the top of the cabinet and get recirculated.