Problem with the polar mohr model 66 machine when turning on it immediately comes out error code 603

Who can help me technically with advice, videos, manuals, what to do, to solve the problem of error code 603 ... That presents the polar mohr machine model 66
Any information this is my cell phone number and email +584146574768. geanrivero77@hotmail.com waiting for a response from the members of this forum.
Traducido con DeepL https://www.deepl.com/app/?utm_medium=android-share

 

Hi, sir:
Check fuse F3 or F4, and MHS( knife upstroke control ) voltages, defective by out of tolerance.

or device MHS defective.

 

Hello
where is your machine located?

 

did you changed some mechanical part recently in the machine?