Hey all, new here and this is my first post.
I work for a company making surfing machines and we are currently using Emerson VFD's to run 140hp pumps. these VFD's are failing constantly due to low voltage corrosion issues on the circuit boards themselves and the interconnects between the boards and the keypad and whatever low voltage things have connections. the panels usually operate ina humid environment and are suceptable to chlorine and pool acid gasses(they are usually in the filter rooms). We try to prevent this, but drives still begin to have intermittant issues about 4 months into operation and are so unreliable after about 8-10 months that they have to be swapped out. all issues are on the low voltage side. i know that the corrosion can play a huge role in this, but i just think that a VFD should have some level of corrosion resistance built into it. i feel like the emerson vfds are like glass, with anything "out of the ordinary" screwing them up.
i know its not an HVAC application, but i figure you guys have some significant history with AC drives.
so, any opinions on Emerson drives?
I have had a suggestion for Yaskawa drives, any comments?
Thanks for any and all!