Problem: BK4 workbench does not work when rising.
Check: the hydraulic pump is working, the solenoid valve light is not on, check whether the 4FUO fuse is broken, and check whether there are 24V DC between 400+ and 401;
When the table is open, measure whether there are 24V DC from 18.10 to 401;
If everything is OK, open the cover plate inside the column opposite the station to see if the terminal is loose.
Solution: the terminals are loose and re-tighten.
