GREER Company MICROGUARD 424 User manual

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MICROGUARD424 OPERATION/TROUBLESHOOTING MANUAL PN W424103 REV A 02/13/01
MICROGUARD
MICROGUARDMICROGUARD
MICROGUARD424
424424
424
RATED CAPACITY INDICATOR SYSTEM
RATED CAPACITY INDICATOR SYSTEMRATED CAPACITY INDICATOR SYSTEM
RATED CAPACITY INDICATOR SYSTEM
OPERATION/TROUBLESHOOTING
OPERATION/TROUBLESHOOTINGOPERATION/TROUBLESHOOTING
OPERATION/TROUBLESHOOTING
MANUAL
MANUALMANUAL
MANUAL
TELESCOPIC BOOM CRANES
TELESCOPIC BOOM CRANESTELESCOPIC BOOM CRANES
TELESCOPIC BOOM CRANES
HORIZONTAL DISPLAY
HORIZONTAL DISPLAYHORIZONTAL DISPLAY
HORIZONTAL DISPLAY

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 2of 52 W424103 REV A 02/13/01
The Greer Company is dedicated to the design and
manufacture of electronic parts created to aid in crane
operation and in the protection of crane operators and
associated personnel. This manual has been
developed to assist in helping Service Personnel to
understand, locate, and identify problems that may
arise during the operation of the MicroGuard®424
Rated Capacity Indicator System. Persons using this
Manual must be familiar with the MicroGuard®424
System and with Electrical Servicing. Use of
calibration routines without consultation with the Greer
Company will invalidate the warranty.

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 3of 52 W424103 REV A 02/13/01
MICROGUARD
MICROGUARDMICROGUARD
MICROGUARD424
424424
424
RATED CAPACITY INDICATOR SYSTEM
RATED CAPACITY INDICATOR SYSTEMRATED CAPACITY INDICATOR SYSTEM
RATED CAPACITY INDICATOR SYSTEM
OPERATION/TROUBLESHOOTING MANUAL
OPERATION/TROUBLESHOOTING MANUALOPERATION/TROUBLESHOOTING MANUAL
OPERATION/TROUBLESHOOTING MANUAL
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
SECTION 1: OPERATION
SECTION 1: OPERATIONSECTION 1: OPERATION
SECTION 1: OPERATION
MICROGUARD424 SYSTEM DESCRIPTION...............................................................................................4
DISPLAY WINDOWS ....................................................................................................................................5-6
PUSH BUTTONS - ICONS - LAMPS - ALARMS.........................................................................................7-10
MICROGUARD424 SYSTEM OPERATION ................................................................................................11
CONFIGURATION SELECTION ...............................................................................................................12-15
EXAMPLES OF CRANE SET UP.................................................................................................16-20
MAIN BOOM .............................................................................................................................16
MAIN BOOM PLUS 35' OFFSETTABLE FLY...........................................................................17
MAIN BOOM PLUS 48' TELESCOPING FLY...........................................................................18
ON TIRES .................................................................................................................................19
RIGGING/TRAVEL MODE........................................................................................................20
OPERATOR SETTABLE ALARMS ...........................................................................................................21-24
METHOD OF SETTING.....................................................................................................................22
EXAMPLES OF SETTING ALARMS ............................................................................................23-24
CANCELING ALARMS ......................................................................................................................24
PERIODIC INSPECTIONS ........................................................................................................................25-26
CHECKING THE ANTI TWO-BLOCK SYSTEM...........................................................................25-26
ROUTINE MAINTENANCE ...............................................................................................................26
SECTION 2: TROUBLESHOOTING
SECTION 2: TROUBLESHOOTINGSECTION 2: TROUBLESHOOTING
SECTION 2: TROUBLESHOOTING.....................................................................................27-51

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 4of 52 W424103 REV A 02/13/01
MICROGUARD424 SYSTEM DESCRIPTION
This manual describes the function and operation of the MicroGuard424 Rated Capacity Indicator (RCI)
System for telescopic boom cranes. The MicroGuard424 System is intended to aid the crane operator in
efficient crane operation by continuously monitoring the load and warning of an approach to an overload or a
two-block condition. This System, which monitors crane functions by means of high accuracy sensors,
continuously compares the load suspended below the boom head with data from a copy of the crane capacity
chart, stored in the computer memory. If an overload is approached, the MicroGuard424 System warns the
operator by means of audible and visual alarms and can be configured to cause function kick-out.
The MicroGuard424 indicator provides the operator with a continuous display of:
♦Rated Capacity
♦Actual Load
♦Percentage of Rated Capacity
♦Radius of the Load
♦Angle of the Main Boom
♦Working Area
♦Crane Configuration
And by means of alternate display push buttons, it provides the operator with:
♦Length of the Main Boom
♦Height of the Boom Head
On-screen messages provide the operator with visual indications of the various alarms, which may occur
during normal operation of the MicroGuard424 System. These values are displayed on the left and upper
right display. The lower right display gives information about the currently selected crane configuration.
INFORM ATION
TEST
W
MAX
W
100%
MicroG uard 424
CRANE
SET UP
STO W ED
DEDUCT
WORKING
AREADEDUCT
ERECTED S TO W ED
SELECT
VIEW SET CLEAR DOW N UP
CONTRASTOPERATOR ALARM S

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 5of 52 W424103 REV A 02/13/01
DISPLAY WINDOWS
LEFT DISPLAY WINDOW
LEFT DISPLAY WINDOWLEFT DISPLAY WINDOW
LEFT DISPLAY WINDOW
1 MAXIMUM RATED CAPACITY is a digital
display of the maximum permitted capacity.
It is derived from the crane's capacity chart.
A copy of this chart is stored in the computer
memory and is the reference capacity for
any lifting operation. Maximum Rated
Capacity is dependent on the configuration
currently selected. This configuration, shown
in the lower right display, determines the
section of the capacity chart to be used as
the capacity reference. If maximum rated
capacity is limited by parts of line, then the
displayed MAXIMUM RATED CAPACITY is
the rope capacity and the message, "ROPE
LIMIT" is displayed in the information area.
2 The BAR GRAPH is an analog bar graph in the upper display that gives a visual indication of how much
of the crane capacity is being used and the rate at which an overload is being approached. This
bar graph in conjunction with the 100% capacity marker gives a visual indication of when the overload
point is reached.
3 PERCENTAGE OF RATED CAPACITY is a part of the bar graph display. A digital readout
within the bar graph display expresses Actual Load as a percentage of Maximum Rated Capacity.
For percentages of less than 100%, the display will be at the right side of the bar graph.
For percentages over 87%, the display will move to the center of the bar graph in order to make
space for the leading edge of the bar graph.
4 The INFORMATION AREA provides the operator with a visual indication of the various alarms, which
may occur during normal operation of the MicroGuard424 System. For example, PRE-ALARM or
OVERLOAD, ATB ALARM, and ROPE LIMIT.
5 ACTUAL LOAD is a digital display that shows total load suspended below the boom or jib head. It
includes the load, slings, pins or tackle used to secure the load and the hook block.
INFORM ATION
TEST
W
MAX
W
100%
MicroG uard424
VIEW SET CLEAR DOW N UP
CO N TRASTOPERATOR ALARM S
1
2
3
4
5
5.82
3.46
60%
ATB ALARM

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 6of 52 W424103 REV A 02/13/01
DISPLAY WINDOWS
RIGHT SIDE DISPLAYS
RIGHT SIDE DISPLAYSRIGHT SIDE DISPLAYS
RIGHT SIDE DISPLAYS
1 The RADIUS/HEIGHT display gives a
continuous indication of the radius of the load,
which is the horizontal distance from the
centerline of rotation to the centerline of the
hook. When the Radius/Height push button is
pressed, the display will give a momentary
readout of the height of the boom head above
ground level i.e., the vertical distance from the
ground to the boom/jib head. Information about
height is only displayed while the Radius/Height
push button is pressed and held.
2 The PARTS OF LINE display shows the parts
of line currently selected. If the parts of line
selected has a lower safe working strength than
the actual capacity, the MAXIMUM RATED
CAPACITY display will show the reduced
capacity and the message, "ROPE LIMIT" will appear in the information area.
3 The WINCH IN USE display indicates the selected winch. "F" indicates front; "R" indicates rear.
4 The ANGLE/LENGTH display gives a continuous indication of the angle of the main boom relative to
horizontal. When the angle/length push button is pressed and held, the display will give a momentary
readout of the length of the Main Boom from the boom foot pin to the shaft of the head machinery.
Information about length is shown only while the Angle/Length push button is pressed and held.
5 The WORKING AREA is located in the lower right of the middle display. Descriptions conform to the
current configuration selected and to the swing position of the crane upper. For example, the following
messages will appear:
Front, Side, Rear, 360°
Line, Track (between tracks)
6 The OUTRIGGERS or TIRES display is locateded in the lower left of the middle display. Readout is
determined by the current duty selection.
7 The LIFTING POINT is continuously shown in the lower display. If an attachment such as a fly
is erected but is not the lifting point, the DEDUCT (see Push Buttons, Icons, and Lamps) light
will be illuminated.
CRANE
SET UP
STOWED
DEDUCT
WORKING
AREADEDUCT
ERECTED STOWED
SELECT
57.2 8F 49.1
360°
OUTRIGGERS
MAIN BOOM
1
2
3
4
5
6
7

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 7of 52 W424103 REV A 02/13/01
PUSH BUTTONS
PUSH BUTTONSPUSH BUTTONS
PUSH BUTTONS -
--
- ICONS
ICONSICONS
ICONS -
--
- LAMPS
LAMPSLAMPS
LAMPS -
--
- ALARMS
ALARMSALARMS
ALARMS
LEFT DISPLAY
LEFT DISPLAYLEFT DISPLAY
LEFT DISPLAY
1 TEST is a push button used to initiate a system
self-test; it is also used to display fault codes.
2 CANCEL ALARM is a push button used to silence
the audible alarm when the alarm has occurred as
a result of either an Overload, an Anti Two-Block
alarm, or an Operator Settable alarm. CANCEL
ALARM is also used to reset the function kick-out
relay when it is necessary to by-pass function
kick-out.
3 The PRE-ALARM (AMBER) indicator illuminates
at a pre-set value of 90% of Maximum Rated
Capacity and provides a visual indication of an
approach to an overload.
4 The OVERLOAD INDICATOR (RED) illuminates at a pre-set value of 100% of Maximum Rated Capacity
and provides a visual indication of Maximum Allowed Load. The OVERLOAD INDICATOR will also
illuminate whenever an anti two-block (A.T.B.) alarm occurs or a wire rope limit is exceeded or an
operator SETTABLE alarm has been reached or exceeded. When the crane is equipped with function
kick-out, this will occur simultaneously for an Overload, Wire Rope Limit, or an Anti Two-Block condition,
but function kick-out will not occur when exceeding an operator set alarm.
5 The BAR GRAPH ICON is a part of the analog bar graph in the upper display. This display bar graph
gives a visual indication of how much of the crane's capacity is being used and the rate at which an
overload is being approached. The leading edge of the bar graph aligns with three colored bands in the
bar graph indicator. Red indicates an overload. Between the red and amber is a black notch, which
indicates 100% of rated capacity. The 100% RATED CAPACITY indicator is above the bar graph in the
upper display and marks the point at which 100% of the rated capacity of the crane has been reached.
When the value of 100% has been reached, it corresponds to the Maximum Rated Capacity in the upper
display.
6 The INFORMATION AREA indicates the area of the upper display that provides the operator with a visual
indication of the various alarms, which may occur during normal operation of the system.
7 The ACTUAL LOAD ICON indicates the area of the display that shows the total load suspended below
the boom, fly, or jib head. It includes the load, any slings, pins or tackle used to secure the load and also
includes the weight of the hook block.
8 The MAXIMUM RATED CAPACITY icon indicates the area of the upper display that gives a readout of
maximum rated capacity for the currently selected configuration.
W
TEST
W
MAX
100%
INFORMATION
LEFT DISPLAY
8
7
3
5
2
14
6
VIEW SET CLEAR DOWN UP
910 11 12 13

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 8of 52 W424103 REV A 02/13/01
OPERATOR ALARM BUTTON
OPERATOR ALARM BUTTONOPERATOR ALARM BUTTON
OPERATOR ALARM BUTTONS AND CONTRAST
S AND CONTRASTS AND CONTRAST
S AND CONTRAST
9 VIEW is a push button used during the setting of operator alarms. It is used to start the routine and to
view the current alarm settings.
10 SET is a push button used during the setting of operator alarms to set a new alarm setting.
11 CLEAR is a push button used during the setting of operator alarms to clear the current alarm setting.
12 CONTRAST (DOWN) is a push button used to decrease the display contrast.
13 CONTRAST (UP) is a push button used to increase the display contrast.

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 9of 52 W424103 REV A 02/13/01
UPPER RIGHT DISPLAY
UPPER RIGHT DISPLAYUPPER RIGHT DISPLAY
UPPER RIGHT DISPLAY
1 The RADIUS/HEIGHT icon
indicates the area of the display
that gives a readout of radius
and height. This icon is also a
push button used to select the
alternate display of height.
HEIGHT is displayed only when
the push button is pressed and
held. When this push button is
not pressed, the display
readout is always the radius of
the load.
2 The PARTS OF LINE icon
indicates the area of the display
that gives a read-out of the parts of line currently selected. This icon is also a push button used to select
the parts of line in use on the selected winch.
3 The WINCH SELECT icon indicates the area of the display that gives a readout of the winch currently
selected. This icon is also the push button used to select the Front or Rear winch. When switching
between winches, the parts of line previously selected for the other winch is recorded and displayed
whenever the alternate winch is selected.
4 The ANGLE/LENGTH icon indicates the area of the display that gives a read-out of angle or length. This
icon is also a push button used to select the alternate display of Length. Length is displayed only when
the push button is pressed and held. When this push button is not pressed, the display will always show
the Angle of the main boom.
5 WORKING AREA indicates the part of the display where messages can be displayed. Messages in this
area will conform to the current duty selection and the swing position of the crane upper.
6 STOWED DEDUCT is a push button that is used to start the selection of deducts for stowed attachments.
The first press of the button will start the menu, after which it will function as a down-arrow for scrolling.
7 CRANE SET UP indicates the area of the display showing a read-out of the currently selected crane
configuration (on OUTRIGGERS or TIRES). CRANE SETUP is also a push button used to start the
selection of configurations.
CRANE
SET UP
STOWED WORKING
AREADEDUCT
1
23
4
5
6
7
UPPER RIGHT DISPLAY

Greer Company
Greer CompanyGreer Company
Greer Company Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA CA 92705 Tel:[phone] Fax:[phone]
MicroGuard424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
Page 10 of 52 W424103 REV A 02/13/01
LOWER RIGHT PUSH BUTTONS AND ICONS
LOWER RIGHT PUSH BUTTONS AND ICONSLOWER RIGHT PUSH BUTTONS AND ICONS
LOWER RIGHT PUSH BUTTONS AND ICONS
1 and 3 UP/DOWN ARROWS are push buttons used as arrows for scrolling.
2 DEDUCT INDICATOR is an icon that contains two amber lamps, which indicate stowed and
erected deducts. When a deduct is selected, the appropriate lamp will illuminate to warn the
operator that a deduct has been applied.
4 and 6 RIGHT and LEFT ARROW are push buttons used in calibration routines.
5 SELECT is a push button used to terminate all selection and calibration routines.
DEDUCT
ERECTED STOWED
SELECT
1
2
3
4
5
6