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
Page
11
of
52
W424103 REV A 02/13/01
MICROGUARD
424
SYSTEM OPERATION
SYSTEM OPERATION
SYSTEM OPERATION
SYSTEM OPERATION
At start-up, the MicroGuard
424 System automatically performs a self-test. Upon completion of the self-test,
the System goes directly to the normal working screen. The self-test can be initiated at any time during
normal operation by pressing the TEST button.
TEST
TEST
TEST
TEST
One press (press and release) will cause the system to execute a self-test routine during which all lamps,
audible alarms, and digital displays will be functionally tested, and all memory areas will be checked for
accuracy. If faults in the system are detected during a test, the information area in the upper display will show
the word
FAULT
. If the word FAULT occurs, press and
hold
the TEST button. This will cause the display to
change to the FAULT mode. In this mode, information about the fault condition will be displayed in the middle
display by means of an error code.
CANCEL ALARM
CANCEL ALARM
CANCEL ALARM
CANCEL ALARM
CANCEL ALARM is used to cancel the audible alarm when the alarm has occurred as a result of either an
Overload, an Anti Two-Block alarm (A.T.B.) or an Operator Settable alarm. The audible alarm may be
canceled by pressing and releasing the CANCEL ALARM button
. The
audible alarm remains canceled
until the condition, which caused the alarm, has been removed
. For example, if the audible alarm was
canceled because of an overload condition, it will remain canceled until the overload condition is removed.
However, if a different alarm (e.g., an anti two-block condition) was to occur when the audible alarm was still
canceled for an earlier overload condition, the new alarm condition would cause the audible alarm to be
restarted.
CANCEL ALARM is also used to reset the function kick-out relay when it is necessary to by-pass a function
kick-out that has occurred as a result of either an overload or an A.T.B. alarm. The relay is reset by first
canceling the audible alarm [as described above] and then pressing and holding the CANCEL ALARM button
for about 3 seconds, after which the function kick-out relay will be set to normal operation. However, should
another different alarm condition occur when the relay had previously been overridden, then the newly
occurring alarm condition would cause the motion cut to be restarted.
CANCEL ALARM is a temporary function. The audible alarm or function kick-out is automatically reset when
the condition that caused the alarm is no longer present.
WHEN FUNCTION KICK-OUT IS RESET BY MEANS OF THE CANCEL ALARM BUTTON YOU ARE NO
LONGER PROTECTED AGAINST THE CONDITION THAT CAUSED THE FUNCTION KICK-OUT.
WARNING