aLIGO LHO Logbook

H1 CDS

david.barker@LIGO.ORG - posted 17:53, Tuesday 09 August 2016 - last comment - 06:41, Wednesday 10 August 2016(28968)

MSR cooling system fan noise

Bubba, Jim, Dave:

UNIT-1 cooling in the MSR developed a very noisy fan this afternoon. It has been opened as FRS-6039. This system was turned off and the other two units had their set points reduced from 70F to 67F after the room became noticably warmer.

The room temperature can be monitored via the Beckhoff channels H1:pEM-C_MSR_RACK[1,2]_TEMPERATURE. It shows the temp increased from 18C to 26C (64F to 78F).

Comments related to this report

richard.mccarthy@LIGO.ORG - 06:23, Wednesday 10 August 2016 (28975)

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With the system at 80degF last night I had Tara open the door to the room to get some cooler air in.  Seems to have stabilized the temperature.

richard.mccarthy@LIGO.ORG - 06:41, Wednesday 10 August 2016 (28976)

Link

This morning Bubba lubricated a bushing and has started the fan back up.  If the noise starts again we will have to shut it down again.  Bubba is looking into a replacement motor.