I understood that it was a Biomed's role, to minimise risk and disruption to clinical service delivery
If you are waiting for Carefusion to attend site and provide free parts and support, you might be waiting some time.
Is that an acceptable approach? Extended lead times for repair carries an element of risk, because of non-availability of equipment
Whats the matter with taking ownership of this issue to minimise local risk. Perhaps ordering the parts and fit them yourself?
Ask yourself, how can I return this equipment safely to the users, in the minimum amount of time? Can I provide an alternative solution?
Number one priority, is and always should be patient safety, and minimising exposure to risk.
You have the responsibility and moral duty to take ownership of the problem. Plenty of time to apportion blame, costs, after you have resolved your risk issues.