System Self Test - JLG E450A Service And Maintenance Manual

SECTION 6 - JLG CONTROL SYSTEM

System Self Test

The system self test is utilized to locate typical problems. See
Table 6-10, System Test Descriptions and Table 6-11, System
Test Messages for information concerning the tests performed
and available messages in this mode.
1. When the keyswitch is in the platform position and the
self test enabled, the self test function will test all valves,
contactors, platform inputs, indicator lamps, and system
alarms for various fault conditions.
When the keyswitch is in the ground position, the self
test function will test all valves, the line contactor,
ground control inputs, and the ground alarm output for
various fault conditions.
2. In order to test the inputs on the machine, the controller
will ask the service technician to perform various tasks
at the appropriate operator control station. An example
of this is "Close LLU Switch". The controller expects the
ACTIVATE TESTS
YES:ENTER, NO:ESC
RUN SYSTEM TEST
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3.
IN ORDER FOR THE MACHINE TO FUNCTION AFTER THE SELF TEST IS COM-
PLETE, POWER MUST BE RECYCLED USING THE EMS OR THE KEYSWITCH.
Table 6-10. System Test Descriptions
Not available once tests are activated
ENTER activates system tests
NOTE: cannot be done while controller is in use (footswitch
closed) and for a short time afterwards
ENTER starts system test
Not available until tests are activated Displays messages while
system test runs Some messages are prompts, requiring user
intervention.
ENTER can be pressed if a fault is found, to confirm that the
fault has been noted and to continue the system test.
NOTE: a flashing message is critical, and prevents the system
test running
operator to close the lower lift up switch. When the con-
troller sees that the lower lift up switch has been closed,
it will move on to the next input, lower lift down LLD. If
the switch is faulty or the wiring is faulty, the controller
will not move on to the next input. The controller will
continue to wait for the closure of the input. If the oper-
ator knows the switch is faulty and wants to continue
the tests he must simply press the enter key on the ana-
lyzer to continue.
After the controller has conducted the tests from the
chosen operator station, it will display "TESTS COM-
PLETE". This indicates that the controller has checked all
inputs and outputs for that station.
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