Hi, Todor, you post a picture , but that not helps to understand what your question meaning???

If you want get help please giving the detail what are you doing and post the picture which can support you question. 

PS: It seems you did repair Siemens power supply module INSIDE. attention, in this forum we don't support user/member to repair Siemens module by themselves. 

todor_kusigerski58

After a fault in Simodrive 611 module 16/21kW (see picture) one of the MG75N2YS40 elements was replaced because it has a short cuircuit on it and a main fuse go down. Now the drive doesn't like to start. No LED on front panel (from 6 LED) is lite.

Suggest where is the inputs for DC voltage 24V?

Is any DC\DC voltage convertors in the drive and may these are in fault?

I saw 4 small relays inside. What is their role related to this fault? 

Thank you in advance !

 You waste another chance I can help you. I working in the company , where we have 7 machines with Haindenhein controller and most of using Siemens servo drive 611A. I am also good for repair those kind of machines. 

If you really need my help, PLEASE post the picture of your Drive system-from left to the right.

YOU said there is NO LED lite on the drive,--so I need to see your power supply (16/21KW) picture with power on. 

todor_kusigerski58

Additional info:

• Lathe is CTX200E from 1999,   
• Haindenhein controler
• Problem is bad start up.

BR, Todor

 we have no good communication ." I need to see your power supply (16/21KW) picture with POWER ON!" , BUT you can do from you this picture. insert terminal block X181 in and it has jumper like your picture , power up , check U1-V1-W1, to see there are normal voltage. if voltage good, the power module has no any led on , the module is defective. 

BTW, jumper on X181 is default from Siemens factory setting. and in my suggest for you testing there should be at least green led on .

todor_kusigerski58

The drive was tested in this configuration and no led lite, disconnected from other modules.

BR, Todor