Toshiba Tosvert-130 transistor inverter issue

[Hellmooth]

As the title says, I was called by a company that fix aeroplane parts, they have a machine that is used for testing generators, it's stopped working and I was asked to have a look. I've told them it's way out of my depth and I pretty much don't have a clue, but said I would stop by and get a look at the machine and see if I could find any information out. Had a look and seen that the invertor display panel had ST-CC is open, had a look at the manual and it seems it needs to be closed for to run, has anyone worked on these before, or know someone that could fix it, I'm in Edinburgh, cheers!

 

[Hellmooth]

Would the ST be coming out the inverter pcb? How would I locate it, does it show on the drawing?

 

[Darkwood]

Your board will have terminals similar to this ...so finding ST and CC should be easy...

If you do find it and resolve it then just enjoy the brownie points but I only advised you on this one due to its possible simplicity to resolve but normally I would agree with your early statement regarding your honesty and admitting to the customer that its not your field or out of your depth.. these sorts of problems can get very involved and complicated very quickly.

 

[Hellmooth]

Excellent thanks, if I bell these out it should be open then! Do the drawings show the points of the loop?

 

[Hellmooth]

I say that so I could trace from one point to the next?

 

[Hellmooth]

How did you find the manual on that website, I can't see it in Toshiba inverters?

 

[Darkwood]

Its a run prohibit command like a stop circuit so need to be N/C so the drive can run when told to, it is open circuit at the moment so prevents the drive working when it receives a run command, you need to find out why its not a complete loop and look into my suggestions above.

 

[Darkwood]

How did you find the manual on that website, I can't see it in Toshiba inverters?

I typed in 'Tosvert-130 manual' although I don't have enough details to know which manual it is I made the assumption the terminal layout would be similar enough to give you advice.

 

[Hellmooth]

Yeah I understand safety circuits etc, just need to find where the circuit goes so I can see where it is open. I appreciate the help and will give it a go if I can find what the ST circuit entails, if I can't get this sorted then I will leave it at that!

 

[Hellmooth]

Found the drawing, is this the one you were looking at?

 

[Hellmooth]

Would you ever link out ST and CC to see if it fixes the fault, ie brings the power back on to the machine, obviously done in a controlled safe manner?

 

[Hellmooth]

I say this as I link out safety circuits whilst working on automation to find a fault, this is a larger scale so don't know if it's advisable.

 

[Darkwood]

Would you ever link out ST and CC to see if it fixes the fault, ie brings the power back on to the machine, obviously done in a controlled safe manner?

I would not advise you to ever unless you understand exactly what you are doing and the risks involved - even just to test a theory, I do it but I do have the knowledge to do so... the diagram you posted is more complex than the one I sourced and may differ' but you need to refer to the manual for that exact model, you only supplied the brand and range, it seems there are a few variants/generations of the tosvert-130.

 

[Hellmooth]

Yeah I'll have to get a look at the exact manual, if I can find the info to trace the circuit then happy days, if not then I won't be getting involved. Cheers!