Posts

Posted on

Liebherr Crane Starts, but Will Not Operate

Remote will start the crane, but no functions work.  Display shows Trolley Position, Hook Height and Slew Angle, but no functions work.  See screen:

Note left arrow.  M511 means wind zone is not confirmed (1st clue, see “M” codes in Liebherr folder).  Right arrow indicates trolley position, but does not indicate jib length (the 0.0 below position).  Go into scaling (key switch CCW to scaling) and press F3 for scaling summary.  All icons should have a checkmark next to it.

Liebherr Scaling Screenshot

Any icons that have a “X” next to it need to be reconfirmed.  F1 to previous screen, and F2 to confirm each icon.  Must confirm the OK at the end as well.

Posted on

Slew Drive shuts off during acceleration

Slew drive starts up normally, and begins to swing, but coasts to stop and drive shuts down with code 7510 (FBA A comm loss func).  Could not get code to clear or swing to operate.  Checked CanOPEN card and both status lights looked good.  FEN 31 (encoder card) also had 2 green lights, but tried to remove encoder connectors and still could not get to work.  Per JP’s recommendation, remove LFC and CCL plugs and install jumpers.  Remove network cables from Trolley and Hoist drives.  Restart crane and test swing, and it works normally with no faults.  Plugged back in trolley network cable, and swing would still work.  Plugged in Hoist network cable and Swing drive would fault without Hoist drive even being turned on.  It was determined that there was a fault in the keypad of the Hoist drive.  Replace keypad and crane worked normally.

 

*For notes.  JP determined there was a fault in the communication system (FBA A Field Bus Adapter), but wanted to isolate what it was.  It was a communication fault through the Can Bus system.  By isolating just the swing drive and swing encoder, we could start to determine it was either of those.  If the Hoist keypad hadn’t caused failure, we would have added back the LFC and CCL plugs 1 at a time to determine if it was a communication fault in the drives, or encoders which also communicate through the Can Bus.  Also note that CAN H and CAN L should produce approx 2.5 VDC to “-” on terminal strip.  This could determine if there is a short to ground.  If the voltage is 0 or low, begin unplugging devices until voltage is restored

Posted on

Crane won’t swing 1-600-640 code on remote

Upon start up, crane will not swing, and remote displays 1-600-640.  That code is not in the manual.  We need the code off the slew drive itself. 

Removed cover and memory stick, and reinstalled memory stick.  Crane started and all functions are working.