This morning the B5_PD1 photodiode was automatically closed during the maintenance. In agreement with the operator I enabled the Vbias and reopened the photodiode shutter at 16h18m utc. See the following message from VPM log for the exact time:

2019-04-16-16h18m11-UTC    info gouaty       Rearm vbias of photodiode SDB2_B5_PD1 of mezzanine SDB2_MezzPD1
2019-04-16-16h18m12-UTC    info gouaty       Open shutter of photodiode SDB2_B5_PD1 from mezzanine SDB2_MezzPD1