Drive has been fully serviced with new capacitors on power supply, new DC link capacitors, and the CUVC card has had microcontrollers and flash freshly reflowed to cure any bad joints.

Does anyone know what this fault indicates to help me narrow the fault down? Im pretty certain the fault lies on the CUVC but will take me ages to start swapping microprocessors, I'd rather aim to one section of the drive to solve the fault.

Many thanks, I am fairly new to this forum however I have had fantastic success at repairing many Siemens devices to component level including blown micromaster 440's and hope to help anyone I can with my knowledge.