Just finished installing a 10 ton demag crane. The crane should have three speeds for the bridge and trolley but they do not work. The only speeds that work for the bridge and trolley are creep (very slow). The inputs are lighting up for each speed but there is no output for the 2nd and 3rd speed. Any ideas ? I would like to keep the slc 150 if possible because i have 5 more cranes with consecutive serial numbers to install in this facility.