Category: Potain MDT 109

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Crane only moves at slowest speed with all functions

Customer was operating MDT crane with remote, but all functions were slow.  Had the following icon on the display of the remote:

Crane was in P+ mode, which allows for greater capacity, but slows function.  On the remote this is controlled with ” A-B ” switch.

In the cab this is controlled by the gray button on the top of the left joystick.

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Weathervane adjustment for MDT Tower Cranes

Make sure both motors are adjusted per instructions.

https://service.rockymtncranes.com/wp/wp-content/uploads/2020/11/FCR_brake-weathervaning__slewing_mechanism_encoder_GME-1.pdf

If the weathervane light does not display on LMI or the remote, adjust the microswitch as follows.

With the motor in weathervane and the brake is locked in the release position.  Adjust the blade that contacts the microswitch.  Careful to make sure the blade just contacts the microswitch and doesn’t smash the switch.

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Motor Encoder shuts down crane when fails

Change the parameter in the slew drive to warning instead of fault.

  • Make sure the crane is powered off
  • Connect remote to Ethernet cable and the other end to the top of the ACS 380 drive
  • Start crane
  • Select MENU
  • Select PARAMETERS
  • Go to menu 96 and select menu 96.02 (Pass Code)
  • Enter code <8528>
  • ESC back to menu 90.45 (Motor Feedback)
  • Change 90.45 to WARNING (1)
  • ESC back to menu list
  • Verify Menu 96.10=4 (work)
  • Go to Menu 96.11 and select Option 18 (be sure it is 18!!!!)
  • Allow change to save to drive
  • Go back to 96.11 and select Option 1