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Reports until 13:38, Monday 16 July 2018
H1 SEI (PEM)
hugh.radkins@LIGO.ORG - posted 13:38, Monday 16 July 2018 (42921)
LHO End Station HEPI Pumps Off with 0U3 error on VFD causal to Mainmon Spike

The Pump station faults over the weekend,--aLog 42905, corresponds to a glitch seen on the H1:PEM-EY_MAINSMON_EBAY_QUAD_SUM_DQ channels, see the attached plot..  A spike in the supply can cause the VFD to sense an excessive voltage and the VFD zeros its output and goes into OU3 fault.

Bringing these pumps back on line was standard but did require access inside the enclosure to press the reset button.

FRS 11093

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Displaying report 1-1 of 1.