Originally Posted by
imsly2
The rotary phase converter was not connected/turned on at all during this test. It was only the single phase 240 from the main lines ran to L1 and L3 on the machine without any jumper to L2. I mentioned me running a new line for the use with 3 phase power, but don't want it necessarily to be confused with the causality of this problem. Specifically, because that has led me down the wrong road in diagnosing things in the past.
I've learned through research that 3 phase variable frequency drives driven with single phase power can fail. It IS a new electrical line, but only currently connected to single phase 240 power on the L1 and L3 inputs on the machine. I have double and triple checked this to make sure I'm not doing something silly to cause this problem. If you can think of something wrong I could have done with hooking up single phase power to these inputs that might have caused this problem than I am eager to hear you out. If you think that me hooking up single phase power to this 3 phase variable frequency drive has caused this failure it is important to me as well.
I just want to know about this specific mode of failure and any other ways I can further test to prove that the VFD has failed and needs replaced vs. any other potential problems.
Thank you for your input!!
-Sly2