Manitowoc 18000 - Page 290

Reference Only
TROUBLESHOOTING 18000 SERIVCE/MAINTENANCE MANUAL
10-12
Published 12-05-17, Control # 035-23
Problem 10
Selected load drum will not lower load, but will raise load.
POSSIBLE CAUSES
Control handle is worn; Minimum bail limit opened;
Pump is damaged; Node fault; Speed sender is damaged.
CHECKS
See Crane Diagnostics topic in Section 3 to find CAN bus packet numbers.
When applicable switch is enabled…
Drum 1 Minimum Bail Limit . . . . . . . . . . . . Packet #39, Bank 2 changed by 2
Drum 2 Minimum Bail Limit . . . . . . . . . . . . Packet #34, Bank 2 changed by 2
Drum 3 Minimum Bail Limit . . . . . . . . . . . . Packet #33, Bank 2 changed by 2
Drum 1 Pump Control - Lower . . . . . . . . . . Packet #33, Bank 2 changed by 8
Drum 2 Pump Control - Lower . . . . . . . . . . Packet #33, Bank 2 changed by 32
Drum 3 Pump Control - Lower . . . . . . . . . . Packet #33, Bank 3 changed by 2
Bank number increased
by number shown.
Bank number not increased
by number shown.
Does selected DRUM screen approach 100% handle
control with handle moved forward?
Check for problem. Repair limit
switch, wiring, or circuit breaker.
Does selected DRUM screen approach 100% pump
control for each pump, with handle moved forward?
Consult dealer/factory.
Zero volts at rest and 24 volts at full speed present at
pump EDC with handle moved back? (See Section 2 -
Checking Electrical Inputs/Outputs).
Replace pump EDC.
Repair or replace wiring or
consult dealer/factory.
Yes No
Yes No
Yes No
Replace control handle or repair wiring.