Summary:  After a DOWN TIME OF 3hrs 6min, H1 is back to Observing from a High Voltage Vacuum pressure trip at HAM6.  Made it back to NLN on 1st attempt.

Locking Notes:

• 22:59 H1 Lockloss & vacuum pressure interlock trip for HAM6.
• 1:06utc (5:06pm local), Richard gave us the OK to return to locking.  
• Since we were down for a hardware issue for a couple of hrs, I intervened and took ISC_LOCK directly to PRMI ASC (DRMI failed to lock after this, cycled another PRMI lock, and then DRMI locked on 2nd attempt)
• 1:24 Stuck at CHECK_AS_SHUTTERS after we noticed ISC LOCK not going anywhere after being here for a couple of minutes!
  • During earlier troubleshooting, the FAST SHUTTER guardian node was taken to the "TEST SHUTTER" state @23:49 (and since the HV was tripped, this node went to the SHUTTER FAILURE state & stayed here!).  When we saw that ISC_LOCK was stuck, we went to this FAST SHUTTER node, & took it back to READY at @1:27.  This immediately got ISC LOCK going again.
• 1:57 NOMINAL LOW NOISE w/ SDF Diffs (see attached)
  • SDF diffs came up for ETMx & ETMy related to TEST M0 p & y offsets.  One of the offsets was non-zero at 1.0, but Jeff & I transferred this 1.0 from the TEST filter bank to the OPTIC ALIGN filter bank for ETMx pitch (then we REVERTED all diffs for ETMx/y).  The other SDF diff was for ALSY WFS DOF3 p&y (they had an F9 filter ON); since we aren't using ALS at NLN, we REVERTED these.
• 2:05 OBSERVING