JLG E300 Service Manual - Manual (Page 196)

SECTION 6 - JLG CONTROL SYSTEM
6-28 – JLG Lift – 3121253
System Self Test
The system self test is utilized to locate typical problems.
See Table 6-5, System Test Descriptions for information
concerning the tests performed and available messages
in this mode.
1. When the key switch 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 key switch is in the ground position, the
self test function will test all valves, the line contac-
tor, ground control inputs, and the ground alarm out-
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 tasks at the appropriate operator control station.
An example of this is “Close TWR U Switch”. The
controller expects the operator to close the tower lift
up switch. When the controller sees that the tower lift
up switch has been closed, it will move on to the
next input. 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 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 operator station, it will display “TESTS 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 KEY SWITCH.
Table 6-5. 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 after-
wards
RUN SYSTEM TEST 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