Fault 21858
ULTRACAM cooling pipes caught during operation
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Time Occurred03:28 Date Occurred22/06/2015Entered By Unknown
Assigned To Juerg ReySeverity SevereSite WHT
Instrument UltraCAMStatus ObservationFault Type Operations
Time Lost 00:00     
Fault Description
This evening as the telescope was sent to the first target, a flat field, the ULTRACAM cooling pipes got caught on something outside the central platform. We discovered the problem only after the tension in the pipes had pulled the water chiller across the platform and onto it`s back, snapping one of the hose connectors in the process. The chiller continued pumping water out of the broken pipe and onto the floor. 

We quickly mopped up the water, and brought up the replacement chiller, re-filled the water and were ready to observe just in time for flats. 

The old, snapped connector was embedded in the chiller port. We eventually managed to free it, and replace the connector, so that the original chiller is ready as a spare. 

In future ULTRACAM observers and Telescope Operators should check every evening that the cooling pipes are not dragging outside the central platform and in danger of getting caught on anything.
Solution
Time Reported15:25Date Reported 22/06/2015Entered ByJuerg Rey
Amado checked the area below the telescope floor (submarine), the bull ring area and the cable twister. No evidence of coolant found.
Indeed Telescope Operators should check every evening dome and telescope before moving and in case of Ultracam that the cooling pipes are not dragging outside the central platform and in danger of getting caught on anything. I will talk to Fiona.

[Juerg Rey 15:25 22/06/2015]

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