Reports until 12:42, Monday 10 March 2025
H1 General
corey.gray@LIGO.ORG - posted 12:42, Monday 10 March 2025 - last comment - 15:01, Monday 10 March 2025(83272)
1902utc: H1 DOWNTIME Starts Due To Electrical Issue At EY: Fil mentioned TCS/ISC Power Supplies Needed Restart

Right after Commissioning, H1 had a lockloss and several systems showed odd behavior (EY ISI WD trips, CPS St1 have huge signals, EY Ring Heaters show bad/dead state...).

Fil now at EY and mentioned the TCS and ISC Power Supplies were down and so he needed to restart them.

FRS33539 ticket started. 

Comments related to this report
filiberto.clara@LIGO.ORG - 14:16, Monday 10 March 2025 (83274)
Link

WP 12380

Found one of the power supplies for the ±18V ICS/TCS tripped off. Unit was warm to touch, likely failed fan. Both power supplies were replaced. The negative power supply had its original fan. The ±18V feeds the RF Distribution Amp (CPS Timing) and Ring Heaters causing multiple subsystems to report errors.

F. Clara, S. Dwyer, J. Figueroa, C. Gray,O. Patane, and M. Pirello

marc.pirello@LIGO.ORG - 15:01, Monday 10 March 2025 (83276)
Link

Removed the following supplies, neither had improved fans:
S1300289, S1300295

Replaced them with the following supplies with improved fans installed:
S1201923, S1201926