I've recently had a recurrent issue with MSD pressures. My system (6135 single quad) has twice recently errored to say "MSD1 Foreline pressure too high to turn on turbo pumps (0807)". The odd thing is that the system has not been vented or pumped down - these errors have occurred after a sequence has been completed and the instrument was left with a "Standby" command. In order to solve this the system needs to be vented then pumped down which it has done without issue. I worry that it seems as if the turbos might be switching off in an undesired/uncontrolled way?
Any ideas or comments from anyone?