Since the DMS flag of WI_CO2_Laser became red for mean_TCS_WI_CO2_PWROUT value falling down, I recovered WI CO2 main laser state by acting on its chiller setpoint:

• at 08.26 UTC WI chiller setpoint changed from 19.015°C to 19.035°C → wrong direction

• at 08.30 UTC WI chiller setpoint changed from 19.035°C to 19.005°C → right direction

• at 08.56 UTC WI chiller setpoint changed from 19.005°C to 18.995°C → right direction

The BCK chiller set point has been changed accordingly (18.995°C).

After these actions, the CO2 powers were at their nominal values, without acting on the waveplates.