The flow rate sensor used to monitor the drain rate from BL1A holding tank to active sump, located in the active sump area, was repaired. The paddle wheel, o-ring, and shaft were replaced. This part was significantly worn prior to replacement.

It is recommended to change the filter adjacent to it as it is suspected that this filter is partially clogged, resulting in low flow rate when draining the tank.

Furthermore, it is also recommended to change solenoid valve SV1 as it is suspected that it does not work.