User Manual

SECTION 2 - PROCEDURES
3120884 – JLG Lift – 2-65
System Self Test
The system self test is utilized to locate typical problems.
See Tab le 2-10, System Te st Descriptions and Tab le 2-11,
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 contac-
tor, ground c ontrol i nputs, a nd the g rou nd ala rm ou t-
put for various fault conditions.
2. In order to test the inputs on the machine, the con-
troller will ask the service technician to perform vari-
ous tas ks at the appropriate operator co ntrol station.
An example of this is "Close LLU Switch". The con-
troller expects the operator to close the lower lift up
switch. When the controller 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 th e operator knows the
switch is faulty and wants to continue the tests he
must simply press the enter key on the analyzer to
continue.
3. After the controller has conducted the tests from the
chosen op erato r station , it wi ll display "T ESTS COM-
PLETE". This indicates that the controller has
checked all inputs and outputs for that station.
IN ORDER FOR THE MACHINE TO FUNCTION AFTER THE SELF
TEST IS COMPLETE, POWER MUST BE RECYCLED USING THE
EMS OR THE KEYSWITCH.
Table 2-10. System Test Descriptions
ACTIVATE TESTS
YES:ENTER, NO:ESC
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
RUN SYSTEM TEST ENTER starts system test
Not avai lable unt il test s are a ctivate d Displa ys messag es
while system test runs Some messages are prompts,
requ iring user intervention.
ENTER can be pr essed if a fa ult is found, to co nfirm th at
the fault has been noted and to co ntinue the system test.
NOTE: a flashing message is critical, and prevents the
system test running