Greer Company
Greer Company
Greer Company
Greer Company
Crane Systems
1918 EAST GLENWOOD PLACE, SANTA ANA, CA 92705
Tel: (714) 259 9702 Fax: (714) 259 7626
MicroGuard
424 Operation/Troubleshooting Manual Horizontal Display Hydraulic Cranes
29 of 52
W424103 REV A 02/13/01
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
FAULT DIAGNOSTIC PROCEDURES
FAULT DIAGNOSTIC PROCEDURES
FAULT DIAGNOSTIC PROCEDURES
FAULT DIAGNOSTIC PROCEDURES
Faults in the MicroGuard
424 System are detected
automatically. Each time the MicroGuard
424 System is
switched on it goes through a start up self-test which
lasts about 2-3 seconds. During normal operation a self-
test can be initiated by pressing the TEST button on the
display.
Fault conditions in external sensors are detected without
the need for a system self-test.
Faults detected in the MicroGuard
424 System during
self-test are indicated on the display as follows:
•
The word FAULT will appear in the information area
of the left display.
•
The RED LAMP will illuminate and the AUDIBLE
ALARM will sound.
When faults occur in the system they can be diagnosed
using the display.
Details of the fault locations are obtained by pressing and
holding the test button. Holding the test button will cause
the system to go through a self-test during which faults
will be detected.
Following completion of the self-test:
If the test button continues to be pressed, the fault screen
will appear. The fault screen will remain visible for as
long as the test button is pressed. Information will be
displayed on the screen in four groups.
•
Group A Sensor faults
•
Group B I/O faults
•
Group C Memory faults
•
Group D General faults
FAULT CODES
FAULT CODES
FAULT CODES
FAULT CODES
GROUP “A” ANALOG SENSORS
CODE
AAA
000
NO FAULTS
001 AIN0 PISTON PRESSURE TRANSDUCER
002 AIN1 ROD PRESSURE TRANSDUCER
004 AIN2 EXTENSION SENSOR
008 AIN3 BOOM ANGLE SENSOR
016 AIN4 S’STRUCTURE ANGLE SENSOR
032 AIN5 SWING POTENTIOMETER “A”
064 AIN6 SWING POTENTIOMETER “B”
GROUP “B” INPUTS AND OUTPUTS
CODE
BB FAULT
00 NO
FAULTS
01
1
DIGITAL INPUT AND OUTPUT
02
2
ANALOG INPUT AND OUTPUT
04 4 DISPLAY
UNIT
GROUP “C” MEMORY
CODE
CC
00
NO
FAULTS
01 1
EXECUTIVE
ROM
02 2
DUTY
ROM
04 4
SCRATCHPAD
RAM
08 8
PERSONALITY
ROM
GROUP “D” GENERAL
CODE
DD
00
NO
FAULTS
01
1
NO DUTY FOUND
02
2
CURRENT DUTY BAD
04 4
CONFIGURATION
UNCALIBRATED
08
8
2 HZ OSCILLATOR