Very Sick Lenze 534 Controller

**Mad Professor** · 14-08-2012

If you are on about the big black unit bolted to the end plate, that is a VHF 28-08io5
Half Controlled Single Phase Rectifier Bridge, and the small transformer go's nowhere near it.

The two outputs of the lenze 332 703 transformer go direct to the white upright card. (Lenze 5031AH.1 328633 31 / 46).

**Ricardoco** · 15-08-2012

I Must say thank you to all who are helping with this thread/problem as i wouldnt have a clue without you all.

Rick.

**SimonD** · 25-08-2012

Rick,

My Lenze 534 has blown the same transformer...
Did you replace wit the above recommendation and did it fix it?

Thanks
Simon

**Ricardoco** · 27-08-2012

Originally Posted by SimonD

Rick,

My Lenze 534 has blown the same transformer...
Did you replace wit the above recommendation and did it fix it?

Thanks
Simon

We've not arrived at a decision yet as we are not sure what the correct secondry voltage should be, i was hoping someone would have a look at a working one but it appears nobody has voluteered yet.. LOL, I could be that nobody has one they can look at but i suspect the answer will come up soon.. I HOPE. Im really stuck as i cant use the machine without it...

Rick

**SimonD** · 27-08-2012

Ah... ok thanks... That is where I am at too...
I've asked someone to measure their working one and will report back if I get anything.

Thanks
Simon

**irving2008** · 30-08-2012

Ha... my "remote-voltage-sensing-fu" is working well :)

2x15 V: VB 1,0/2/15 from Farnell £2.07p+VAT but min order value £20

Same from RS £3.74+VAT, free p&p but out of stock till Oct.

Same from CPC £ 3.18 inc VAT + P&P and in stock. Note: this one has 2 x 115v primary so may need minor mod to pcb?

**SimonD** · 01-09-2012

I replaced the transformer yesterday... The output now pulses from on to off when commanded to a speed. Something else must have gone on mine too.
Time to replace with new...

**Ricardoco** · 15-09-2012

Originally Posted by SimonD

I replaced the transformer yesterday... The output now pulses from on to off when commanded to a speed. Something else must have gone on mine too.
Time to replace with new...

Are you any where near resolving your lenze problem?

**Ricardoco** · 28-09-2012

Originally Posted by SimonD

I replaced the transformer yesterday... The output now pulses from on to off when commanded to a speed. Something else must have gone on mine too.
Time to replace with new...

Maybe the Controller needs to be set up again as per the manual. (When i got mine in the begining it was pulsing) i tuned the pots as per the manual and it was fine for 2 yrs...

Rick