Seems strange that this function is in this unit. We would not be in standby mode when this request is made. Would be more appropriate to move this function to ModeGenDialysate.
If you get a chance, try to find out which message (ID) is having the CRC error and where it's coming from (which channel) and why it's failing CRC check (e.g. was a frame missing?)
Is this the right place to close the BC valves? Maybe it should be in transitionToBalChamberFill()? If we come back to this bypass state from delivery state, is it appropriate to close BC valves here?