JLG 450A II Series, Service And Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM
3121290 – JLG Lift – 6-41
Table 6-6. Help Fault Codes, Displayed Faults, and Descriptions
Flash Code Fault Displayed on Analyzer Description Priority
None No flash code indicated for the following help messages. They indi-
cate a possible problem if vehicle is not operating as expected.
1
EVERYTHING OK “Normal” help message in platform mode
GROUND MODE OK “Normal” help message in ground mode
FSW OPEN A drive or boom function has been selected but footswitch is open.
RUNNING AT CREEP – CREEP
SWITCH OPEN All function speeds limited to creep because creep switch is open.
RUNNING AT CREEP – TILTED AND
ABOVE ELEVATION All boom function speeds limited to creep because vehicle is tilted
and above elevation.
RUNNING AT CUTBACK – OUT OF
TRANSPORT POSITION Drive speed is limited to “ELEVATED MAX” because vehicle is out of
transport position.
CHASSIS TILT SENSOR OUT OF
RANGE Chassis tilt sensor has indicated a tilt angle greater than 19 degrees
for more than 4 seconds. Not reported during 2 second power-up.
LOAD SENSOR READING UNDER
WEIGHT Load sensor is reading 20% or more under calibrated zero point. This
fault may occur if basket is resting on ground. Not reported during 2
second power-up.
ENVELOPE ENCROACHED –
HYDRAULICS SUSPENDED Machines with envelope control ONLY. System has detected an
envelope violation
OVER MOMENT – HYDRAULICS
SUSPENDED Only occurs on machines with moment control. System has
detected an over moment violation.
UNDER MOMENT – HYDRAULICS
SUSPENDED Machines with moment control ONLY. System has detected an
under moment violation.
1/1 Flash code 1/1 indicates a “sleep” mode.
NOT REQUIRED
2/1 Flash code 2/1 indicates problems with footswitch.
2
FSW FAULTY Two footswitch inputs have read the same state for more than one
second. An EMS cycle is required.
KEYSWITCH FAULTY Platform and ground modes selected simultaneously
2/2 Flash code 2/2 indicates problems with drive & steer selection.
Except where noted, these faults are not reported during 2 sec-
ond power-up sequence. 3
DRIVE LOCKED – JOYSTICK MOVED
BEFORE FOOTSWITCH Drive selected before and during footswitch closure. Can be
reported during power-up sequence.
FSW INTERLOCK TRIPPED Footswitch closed for seven seconds with no function selected. Can
be reported during power-up sequence.
STEER LOCKED – SELECTED
BEFORE FOOTSWITCH Steer was selected before and during footswitch closure.
STEER SWITCHES FAULTY Both steer switches are active at same time.
D/S JOY. OUT OF RANGE LOW Resistive joysticks: These faults do not occur.
D/S JOY. OUT OF RANGE LOW Resistive joysticks: These faults do not occur.
D/S JOY. OUT OF RANGE HIGH Resistive joysticks: These faults do not occur if Vref voltage is below
8.1 volts. If Vref is above 7.7 volts, Vref is operating out of tolerance or
a short to battery has occurred.