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Reports until 21:45, Tuesday 24 May 2016
H1 TCS
sheila.dwyer@LIGO.ORG - posted 21:45, Tuesday 24 May 2016 - last comment - 16:05, Wednesday 25 May 2016(27374)
TCS chillers tripped

Evan, Sheila, Ed, Nutsinee on the phone

Both TCS lasers tripped off within 20 minutes tonight, apparently because of a low temperature alarm on the chillers.  We called Nutsinee and used the wiki to reset the chillers and lasers, but the lasers didn't come on although the lights on the controller were lit. The chillers tripped again within 15 minutes of being reset.  

We tried setting the TCSX guardian to Down and resetting the chiller again, but the temperature dropped quickly and the chiller started beeping and had a low temperature warning message, so we shut it off using the power button.  

In the attached screenshot the bottom screen is a time machine image of the laser screen from yesterday, the top screen is right now.  We tried enabling the output of LZR_HD, but that didn't work.  

Nutsinee wondered on the phone if this could be related to some bad settings after todays model restart.  I laoded the burt that was created by the model restart, but there are no diffs so that seems OK. 

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Comments related to this report
alastair.heptonstall@LIGO.ORG - 16:05, Wednesday 25 May 2016 (27391)

We should have this problem fixed soon.  There is a chasis that can be installed to fix the problem, however it also needs some changes to channel calibrations and the front end code.

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