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    User name brads

    Log entry time 17:55:44 on June 7,2008

    Entry number 241500

    keyword=Tech/ Left Q1 tripped, OK now

    The left Q1 tripped around 5:15pm. The power supply GUI indicated a cryo fault. All cryo flows and levels look fine (now) but we could not reset remotely.

    Tried the usual manual resets downstairs, no luck. Noticed that the Fortress UPS at the bottom of the Q1 rack was alarming. Called Todd (on-call) and he asked me to power cycle the UPS. That allowed the heaters to come back on. One more manual reset sequence (blue button + reset on the Danfysik supply) fixed the problem.

    FYI, there was a CHL trip at 4pm (75 minutes before the Q1 problem).