Our VFD is coughing from time to time. The spindle just stops spinning and this is the display status when that happens. Any idea of why is this or how to fix it? Anyone has experienced a similar problem with 1.5kw Huanyang VFD? Thanks in advance guys.
I can only guess that it is some form of overload. The user manual seemed rather less than useful in this case.
@Kyle_Kerr exactly, manual was helpless here. Power cycle the VFD and you are back in business for days or weeks. No overheating seems to be happening.
First I would do a resistance check between the motor coils, and each to ground, make sure they are all equal resistance with no shorts.
Then make sure all your pd settings are appropriate for your spindle.
There is overtorque settings, but the default is to ignore, so probably not the issue.
Thanks @Alan_M I will check that. Same VFD and 750w spindle have been running together for more than a year. It might well be a wiring issue but I’d like to get any info about the meaning of the error code so I could be looking in the right direction.
If it was me I’d open it up and check for bad capacitors. Bad caps are a leading cause of electronics malfunctions today. It is something you can visually spot, and do something about too. A word to the wise, when you are buying replacements go for a reputable name brand. Something like Chemicon, Nichicon, or Rubycon, will do the job. The rest are pretty much garbage.
Thanks @Paul_Frederick I will have a look inside then too.
@Miguel_Sanchez
the big can caps, or electrolytic capacitors, you see inside should all have flat tops, Any sign of a bulge at all is bad. Leaking goo, or a dried brown crust on top is really bad.
I found this site/infos that may help:http://www.cnczone.com/forums/phase-converters/117229-forum.html
@Jose_Lobo Thanks for the link. Unfortunately this error is not mentioned.
Hi Miguel, i´ve worked with a lot of inverters but never saw one with such a bad configuration file and poor manual. So, become curious with this chinese “wonder”. OA usually means overload in good inverters. The following manual seems an approach to that: http://www.jinlantrade.com/ebay/invertermanual.pdf
In the last pages there are some errors mentioned and the E.OA.A seems to be your problema even with so many letters.
So, good luck and hope you can solve your problem. Regards.
Oh, i was forgeting, check your configs, there are good posts around the net.
@Jose_Lobo We have a 1CV teknomotor spindle running 10 hours/day milling foam. It did not occurr to me that these four letter messages could be similar to mine (you are right that OA might well represent one of the several overload conditions). On a good month we may have only one problem and then one day it fails twice. I was about to replace the VFD but once of the troubleshooting suggests motor isolation failure, which kind of rings a bell to me. So I think I am going to replace the spindle and see if this goes away. Thanks a lot for the suggestion.
While the manual is dreadful, I managed to get the RS-485 speed control and on/off operation working. So I kind of like it 