Hello.
I have a customer with a Kaeser Compressor that has the Sigma Control Basic controller (made by Siemens) . It has 24 volt DC power supply to it but the start button does not respond. Kaeser says that the complete controller needs to be replaced but this is an extremely expensive option. Are you able to repair these units? The Kaeser part number for the controller is 7.7005.2
Best regards
John Pears