I have a problem with MCS 120 Hydraulic with Bucher valve. The lift very often has a problem with fault log DBSS only with status fault on Otis tool DAR ST. Whenever has an error the call is not registered and will working Normal again after we reset the power supply OFF and ON. We have changed the Bucher selenoid, the new LCB2 board. PSR switches, whole the contactors including LV1, LV2, and LVC.
