Originally Posted by
F4br1c83D
I know exactly what your fault is, if it's still of interest to you. I battled with the exact same drive for a month or so. I still get flashbacks to this day!
No amount of settings tweaking is going to solve Er4, I'm afraid. Luckily when I encountered the fault I still had the manual. Er4 is an IPM fault. The IPM or Intelligent Power Module is the part responsible for creating your 3 phase sinusoidal output, I believe it raplaces a bank of mosfets on your more traditional VFD design. It's just one component to replace. The reason I stumbled upon this thread is because I'm in the process of attempting to repair my drive at the moment (with the help of a more competent enginner from work that understands electrickery better than I) and I was looking for the manual. Mostly just so my mate could have a laugh at the apalling chinglish. He's found the component that's at fault and a suitable replacement, but he has his suspicians that it may have failed due to another damaged component (a small transformer) so we'll see how that turns out. If I get her going again I'll be sure to fill you in on what I did.
In the meantime, my best advice is buy a better VFD. I was sold this one on the basis that it was a Hunayang, which it obviously wasn't. If you want to go cheap then one of those should do you. In the end I opted for a Bosch Rexroth EFC and it's been a blinder so far. no problems whatsoever.