Hello,
Several years back I bought a Soyan Power VFD for the Enco mill. I worked through the users manual and set it up and it has worked like a champ until recently. I can run it for roughly 10 minutes and then it stops with the POFF/UU error. It will then drop out at shorter and irregular interval. I went back to the book and it suggests that the problem is input voltage has dropped out. I measured the voltage and it’s consistently 235 - 240 volts.
I had let the machine sit for a while as I got ready to retire so I figured there might be some corrosion in the power leads. I cleaned everything on the input side with no effect.
Then I noticed something. Every time I use the volt meter to measure the input voltage on the VFD terminal I hear the VFD reset and I’m back in business. I feel kinda stupid trying to use the mill with the voltmeter close at hand to reset the VFD. I’m wondering if I’m missing something?
If I have to I will junk the VFD and get a motor starter to use with the rotary phase converter that came along after the VFD installation but I would rather spend the money on materials.
Several years back I bought a Soyan Power VFD for the Enco mill. I worked through the users manual and set it up and it has worked like a champ until recently. I can run it for roughly 10 minutes and then it stops with the POFF/UU error. It will then drop out at shorter and irregular interval. I went back to the book and it suggests that the problem is input voltage has dropped out. I measured the voltage and it’s consistently 235 - 240 volts.
I had let the machine sit for a while as I got ready to retire so I figured there might be some corrosion in the power leads. I cleaned everything on the input side with no effect.
Then I noticed something. Every time I use the volt meter to measure the input voltage on the VFD terminal I hear the VFD reset and I’m back in business. I feel kinda stupid trying to use the mill with the voltmeter close at hand to reset the VFD. I’m wondering if I’m missing something?
If I have to I will junk the VFD and get a motor starter to use with the rotary phase converter that came along after the VFD installation but I would rather spend the money on materials.