Huanyang VFD and spindle problem

[BriceO]

Hi everyone,

I recently had a problem with my cnc. I tried several things without success, I need your help.
The connection between earth and a damaged wire from the spindle created a short circuit. There was no smoke, the circuit breaker trips. I replaced the damaged wire and now I have the error A.oL and then E.oA.A. when I try to start the vfd.

My setup is: 220v, 800w, 5A, 400HZ, water cooled spindle with a Huanyang VFD 1.5kw. The cable between vfd and spindle is 4 core 16awg shielded.

The spindle seems to be ok. The resistance is 4.2Ohm between each pins (U,V,W not the earth).

Visually the VFD is ok. When I run it witout the cable attached to the spindle there is no error. I tried also to reset settings and apply it again. My setting is:
PD000=0
PD001=0
PD002=1
PD003=400
PD004=400
PD005=400
PD008=220
PD141=220
PD142=5
PD143=4
PD144=3000

Do you have any advice to determine the problem please?

Thanks in advance for your help!

[JAZZCNC]

Sorry to say but often with these if you have E.### errors it's toasted and nothing can be done for it.
I've fitted lots of these and only had 4 failures but 2 of them failed with similair errors and both where dead.

[BriceO]

Thanks for your reply :)

Is there a way to check that the problem is the VFD and not the motor. If I order a new one I would like to be sure that this is the VFD the problem.
Do you had a lot of Huanyang VFD? Are they good in general? Thanks for your help.

[JAZZCNC]

Thanks for your reply :)

Is there a way to check that the problem is the VFD and not the motor. If I order a new one I would like to be sure that this is the VFD the problem.
Do you had a lot of Huanyang VFD? Are they good in general? Thanks for your help.

Very much doubt it's the Spindle they are simple devices. About only useful test you can do is continuity test and check windings haven't shorted to body.

The VFD's are ok for the money and do the job when working but wouldn't say they are Good quality. If you can't return and nothing inside is obviously damaged so can be repaired then much better replacing with higher quality unit.

[BriceO]

Thanks, so the spindle should be ok.

I really doubt that I can return it as the seller doesn't reply my messages. But I just checked the VFD and found a transistor exploded.



This is the model number: kdg15n120h ( documentation)
What do you think ? Is there a chance to save the VFD by replacing this transistor?

Thanks for your help.

[cropwell]

You could try replacing the bit, they are cheap enough ($25 for 10 from China), but don't be surprised if the damage goes back a little deeper than that one component. For the cost of the bits, it is worth a punt. Check your circuit board tracks haven't been fried as well !