Agilent Technologies Turbo-V 3K-G 969-8888 Notice De Mode D'emploi page 294

16 Instructions for Use
Use
Figure 3
The system is provided with a green status led signal.
The green LED located on the Turbo-V 3K-G base front panel
indicates with its flashing frequency the system operating conditions:
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with no flashing: the pump is normally rotating;
slowly flashing (period of about 400 ms): the system is in ramp,
or in braking, or in Stop, or in "Waiting for interlock" status;
fast flashing (period of about 200 ms): error condition.
Turbo-V 3K-G Pumping System User Manual / 87-901-011-01 (C)