Discussion Category: Centrifuge
error " vac" and error code "d4.2" Optima™ L-90 K
Hello, there is an error on the " vac" ultracentrifuge. We checked the error code "d4.2". The O-ring hoses and oil on the ultracentrifuge have been changed relatively recently. How does the error in "d4.2". Stand for and what else can be checked in it?
Reply bydpkleessr
A d42 diagnostic states that the "ambient temperature" is out of range. At any time during the vacuum service were any cables disconnected? Of particular interest is the vacuum sensor connector. Sometimes taking the connector off and on a few times can clean up the contacts but in some cases a fine pointed probe might have to be used to try to narrow the gap between the pins in the connector. You may now also have a bad vacuum sensor although in all of my 33 years working on Beckman ultracentrifuges I only replaced less than a handful of those sensors. Let me know how that goes.
Don