Manitowoc 18000, Service Maintenance Manual, Page: 40 / 316

Reference
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INTRODUCTION 18000 SERIVCE/MAINTENANCE MANUAL
1-28
Published 12-05-17, Control # 035-23
System Faults
See Figure 1-21 for the following procedure.
Node-1 controller monitors and enables a red system fault
light and buzzer if any system fault is detected. Crane fault/
limits screen displays the faults and automatically scrolls
through faults, stopping for three seconds at each fault.
When fault is corrected, the display clears the fault from the
screen after scrolling through fault screen twice. When a
system fault is enabled, one or more message is displayed.
See Digital Display Readings in Section 10 of this manual.
Engine Faults (Tier 4)
See Section 7 for Tier 4 engine diagnostics and DPF related
faults.
Operating Faults and Limit Switches
See Figure 1-21 for the following procedure.
When operating, all limit switches are closed, sending an
input voltage to node-1 controller. If a limit switch is tripped,
system node controller sends a zero output voltage to pump
EDC and brake solenoid. System pump de-strokes and
system brake solenoid valve shifts to apply brake. Move
control in opposite direction of limit to correct the problem.
The limit bypass switch allows crane to be operated beyond
the limits for crane setup or maintenance only. For example,
to add wire rope on load drum or to remove wire rope from
load drum after an operating limit is enabled.
Node-1 controller monitors crane systems and enables a
yellow operating limit light and alert if any limit switch is open
or any programmed limit is reached. To identify and display
operating limit, use scroll switch to access fault screen.
When an operating limit is enabled, one or more messages
are displayed. See Digital Display Readings in Section 10 of
the Service/Maintenance Manual.
Brake and Drum Pawl Operation
All load drums, boom hoist, travel, and swing park brakes are
spring-applied and hydraulically released. Boom hoist (Drum
4), mast hoist (Drum 5), and luffing jib (Drum 6) have drum
pawls that are released with the selected park switch. When
the operator places the selected brake switch in off - park
position, the selected drum pawl is disengaged from drum.
Place selected brake switch in on - park position to apply
pawl to drum.
The swing node-controller releases swing brake and swing
lock when swing brake switch is placed in off - park position.
Travel node-controller releases brake with control handle
movement.
With a drum up or down control handle command, an input
voltage is sent to node-1 controller. Node-1 controller does
not release drum brake until pressure memory holding
pressure is reached to hold the load, as determined by
pressure sender.