PROBLEM 9
The load drum will not raise the load, but will lower the load.
POSSIBLE CAUSES
Block up limit is opened, pump is damaged, control handle is worn,
maximum bail limit is opened, speed sender is damaged.
CHECKS
When the applicable switch or handle is enabled are any of the following displayed:
Boom block-up limit fault
Luffing jib block-up limit fault
Drum 1 pump control—raise, no increase in system pressure
Drum 2 pump control—raise, no increase in system pressure
Drum 3 pump control—raise, no increase in system pressure
Any of the Above Displayed
None of the Above Displayed
Does the drum Diagnostic screen show 100%
handle command with the handle moved back?
Yes No
Check for the problem and repair the limit switch
operation, wiring, or circuit breaker.
Does the drum Diagnostic screen show 100%
pump control with the handle moved back?
Yes
No
Are 28 volts present (full speed) at the pump EDC with the handle moved
fully back? (See Section 3 - Checking Electrical Inputs/Outputs.)
Replace pump EDC
or replace the pump.
Repair or replace the wiring.
Yes
No
Repair or replace the control handle/wiring.
Consult your Manitowoc dealer or the
Crane Care Lattice Team.
To Next Page
Loading...
Need help?
General
