Reference
Only
Manitowoc
Published 01-08-13, Control # 049-05
3-11
2250 MAX-ER 2000 OPERATOR’S MANUAL
OPERATING CONTROLS AND PROCEDURES
3
Connect cord from mast strap pins remote control to
receptacle on MAX-ER controller (Figure 3-3, View C).
Crane Set Up mode must be on to operate this control.
To Retract Mast Strap Pins: Press and hold ON button while
pressing OUT button. Air pressure will retract pins.
To Extend Mast Strap Pins: RELEASE ON and OUT
buttons. Spring pressure will EXTEND pins.
Digital Display
The digital display is located in the operator’s cab.
Scroll to CTWT BHITCH position of digital display as shown
in Figure 3-16 to monitor MAX-ER operating conditions.
1.
CTWT — indicates position, UP or DOWN, of wheeled
counterweight assembly.
2.
BHITCH — indicates backhitch loading in U.S. tons.
System Fault Alert
The system fault beeper and red light in the operator’s cab
come on to warn the operator to two faults:
•
LOAD PIN - all MAX-ER Units
•
MAX-ER SYSTEM - MAX-ER’s with Crane Software
Version 5007 and Higher
A LOAD PIN fault occurs due to faulty voltage output from
the pin (at or near 0 volts or at or near 10 volts).
The fault appears as shown in Figure 3-17 when the
operator scrolls to the system faults group of the digital
display.
The cause of the fault could be a blown fuse or a loose
electric cord at the pin. Check those areas first before
replacing the load sensing pin. If a fuse or loose cord is not
the cause of the fault, replace the load sensing pin. Contact
Crane Care Customer Service at factory for procedure.
If a load sensing pin fault occurs, the counterweight will
remain in its last position. All other crane functions will
remain operable.
A MAX-ER SYSTEM fault occurs if a transducer is out of the
0.6 to 9 voltage range, differential pressure between the
strap cylinders is 1,200 psi (83 bar), or the counterweight
tray is 3° or more out of level.
The fault appears as shown in Figure 3-18 when the
operator scrolls to the system faults group of the digital
display.
Tension ( + ) in U.S. Tons
(varies with load)
CTWT UP
BHITCH
30
Backhitch
Loading
Wheeled Counterweight
Assembly
UP or DOWN
FIGURE 3-17
SYSTEM FAULT
LOAD PIN
FIGURE 3-18
FIGURE 3-19
SYSTEM FAULT MAX-ER
SYSTEM
