Your Nilfisk BR 700S scrubber features a brush lifting system controlled via the OneTouch panel, which centralizes the activation of all cleaning functions. If the brushes do not lift upon request, several elements should be checked as a priority, starting with the most accessible.
Start by checking the battery condition. The BR 700S operates with a 24 V battery that powers the brush lifting system. If the battery is low or poorly charged, the lifting mechanism will not have sufficient power to operate the brushes. Ensure that the battery is fully charged and that the connection terminals are clean and tightly secured. A faulty battery is the most common cause of this issue.
Next, inspect the OneTouch control panel. Press the brush lifting button several times to check that it responds to each press. If the button is stuck, emits no signal, or makes no mechanical noise, the electrical control system is defective and requires repair.
Also check the hydraulic and mechanical system of the brush lifting. The BR 700S uses a mechanism combining hydraulic and mechanical elements to lift the brushes. Look for oil leaks around the lifting system, pinched hoses, or damaged cables. A debris or mechanical blockage may also prevent the brushes from moving fully.
Check the floating system and filters. The technical manual emphasizes that the floating system and filter protect the vacuum unit and ensure optimal airflow. A clogged filter can unbalance the system and indirectly affect the brush lifting by creating abnormal pressure or resistance.
If after these checks the brushes still do not lift, the problem lies within the hydraulic system, position sensors, or control electronics. These internal components require the intervention of a specialized Nilfisk technician for a thorough diagnosis and appropriate repair.
