E63 and E64 errors at start-up

[Greg]

Hi everyone,
Am working on Gambro AK200 Ultra S machine. When I switched on the machine, it displays E63 and E64. It cannot execute the start-up tests.
Anyone to help me please.

[Chris Bates]

I vaguely remember these errors from 20 years ago when I was with Gambro. I'm sure Gerry or Peter Rann would remember better. I did find this
https://www.scribd.com/document/260347352/Gambro-Ak-200
which has this description if it helps:

Good luck
Chris

[John Nixon]

Hi working on tha AK's I only had this error once and had to replaced the FM CPU PCB, hope this helps