It appears that the SQZ HV (PMC/SHG/OPO PZT, ZM2,4,5 PSAMS) went down at 12/08 20:33UTC. Trends attached.
Oli found that the SQZ PMC wasn't locking. We tried enabling the PZT manually and although it thought it was scanning, the PZT Volts remained at -12, Oli found it had been like this since 12/08 20:33UTC. Then realized all PSAMS volts are off and other PZTs. Oli has taken the IFO into observing without SQZ for tonight do the CDS/EE team can look at this tomorrow.
This was likely caused by a reported HAM7 interlock trip. Tagging Vacuum.
Looking at HAM7 pressure doesn't seem to show anything at the time of trip though.
Richard untripped the HV in the Mech room mezzanine at 2024/12/09 16:12:14 UTC this morning. The ZM2/4/5 SAMs railed, we brought them back in 81697 by clearing the servo's histories.
I logged into h0vacly and looked up the status of PT153. See "Latched Device Error Details" in the attached screenshot. According to the manual, this appears to translate to "Electronics failure, Non-volatile memory failure, invalid internal communication".
