[AlexanderJohn]

Hey there folks,
Backstory; I got a new position at work and didn't have time to do a lot with my CNC router. One night I went into my garage to run a program real quick and I never cut the power to the VFD.
Currentstory; I am now on telework for the COVID-19 stuff so I was going to run another program on my lunch break. I went to power on (plug-in) my VFD, to my surprise, it was already plugged in. There was no display, no error, no lights, no output, just cold lifeless death.
What I HAVE checked:
- Circuit breaker = all good
- Power cable = all good, no damage
- Connections in VFD = all tight
- Opened Case = No smell of smoke no obvious burns etc.

Note: It has been plugged in for a few months (the end of December for a Christmas present.)
*ANY HELP* would be appreciated. I know I made a mistake by leaving it on for that long, of course! But is there something I can check inside? I've looked all over the web for the "No display on HY VFD" to no avail.
Thanks in advance!
Alex

[Jim Dawson]

Did you actually check for power?

I have one HY that I wired in a year ago, it is never off, runs my air compressor. And another GS3 that has been on for at least 3 years, maybe more. No problems.

[AlexanderJohn]

Did you actually check for power?

I have one HY that I wired in a year ago, it is never off, runs my air compressor. And another GS3 that has been on for at least 3 years, maybe more. No problems.

Yes. I just now found the fault!



It's a burnt trace from a ceramic capacitor to an HF block.

[Jim Dawson]

That's not good

[AlexanderJohn]

That's not good

Nope it's not. I soldered a jumper wire where the trace was. Pop* fizz* dead...

[Jim Dawson]

Might be time for a new VFD.

[mactec54]

Yes. I just now found the fault!



It's a burnt trace from a ceramic capacitor to an HF block.

When you said you plugged it in, did you just plug it in to a power outlet, Plugging and unplugging is a no for VFD Drives as they will normally end up like this, they must be turned On/Off by a switch or Breaker but never by any means of disconnecting the main Power by plugs

If it was left plugged in that would not normally be a problem, unless the Grounding is poor and you had a storm with lightning may zap it