Just blown up my inverter

**EddyCurrent** · 24-12-2017

"No I never used an earth, the plug has 4 connectors and one of them is left empty (No 4) "

That sounds good and correct.
Pin 1 Phase 1
Pin 2 Phase 2
Pin 3 Phase 3
Pin 4 Not Connected

The spindle needs checking out as cropwell explained.
Regarding parameters I would change these.(when you get the new vfd)

PD014 acceleration time, 1 second is too short in my view, 5 seconds sounds better especially in the early stages of setting up.
PD015 decceleration time, same as above set to 5
PD142 motor rated current, set this to current specified for the spindle, I looked at some and the correct figure seems to be 8.5
PD143 motor poles, I don't know myself how many poles these spindles have but if people are using a value of 2 then it seems reasonable.
PD001 set this to 0 if you are using the keypad controls.

I'm wondering if you have reversed the motor several times without realising it from the front panel buttons, with ramp times of 1 second this may have caused some damage.
As you say, a short at the spindle end would not do the vfd much good.

**EddyCurrent** · 24-12-2017

Also check this;

PD026 stopping mode, it should be set to 0 (decceleration stop)

Just to help things along in future, I would always let the spindle come to a standstill before pressing RUN again.

**Clive S** · 24-12-2017

Originally Posted by Lodds

No I never used an earth, the plug has 4 connectors and one of them is left empty (No 4)

My soldering is the best in the world and I'm wondering if there was a short in the plug on the spindle. I didn't see anything when I took it apart could that have caused the damage if it had shorted?

A good photo of the wiring and spindle plug would help, was the plug connected securely as a loose connection can be bad for the vfd.

I take it you meant (not the best) as a dry joint could also cause problems.

**magicniner** · 25-12-2017

Don't mess with it, return it as faulty!
A decent VFD will detect an incorrect load, be it short or one or more disconnected phase (some detect open circuit but not all) and simply refuse to drive it with an appropriate error code rather than emit Magic Smoke!.
You shouldn't be able to bugger a VFD even by shorting the output, it should detect current overload, shut down and give you a meaningful error.
It's a bad 'un, send it back and buy something decent!
Regards,
Nick

**Lodds** · 25-12-2017

Originally Posted by Clive S

was the plug connected securely as a loose connection can be bad for the vfd.

I take it you meant (not the best) as a dry joint could also cause problems.

To be honest I think it was a bit of both. I have placed an order for a new VFD and spindle, and have ordered 2 additional plugs so I can get the soldering right on my next attempt.

You guys are the best, thanks for all your help and not being judgemental. Merry Christmas to you all.

**Lodds** · 29-12-2017

Just wired up the new VFD and changed the programming as before.

When I press "Run|" the spindle turns for about 2sec then I get an E.ora message and the spindle stops, any ideas? Seems I have been here before.

**Clive S** · 29-12-2017

Originally Posted by Lodds

Just wired up the new VFD and changed the programming as before.

When I press "Run|" the spindle turns for about 2sec then I get an E.ora message and the spindle stops, any ideas? Seems I have been here before.

Are you using the same spindle? Have you rewired the Plug on the spindle. What parameters have you changed?

Which vfd did you get as there are a few types? Pictures would help.

**Lodds** · 29-12-2017

Hi Clive,
Thanks for the response.

I'm using the new spindle.

I have now got it working without error. I changed back some of the settings I had changed earlier. now it runs full pelt without error.

Just to to understand now how to display RPM and how to drop the speed?

Thanks
Tony

**Lodds** · 29-12-2017

Oh Forgot, this is my kit

https://www.ebay.co.uk/itm/2-2KW-WAT...53.m2749.l2649

Tony

**Clive S** · 29-12-2017

Originally Posted by Lodds

Hi Clive,
Thanks for the response.

I'm using the new spindle.

I have now got it working without error. I changed back some of the settings I had changed earlier. now it runs full pelt without error.

Just to to understand now how to display RPM and how to drop the speed?

Thanks
Tony

Tony Just because it is running at full pelt does not mean it is correct! So I would go through the setting carefully to make sure they are correct. It is impossible to help with the parameters without knowing what you have set them to.

You don't want a repeat of what happened before