JLG 450A II Series, Service And Maintenance Manual

Page: 352 / 396

SECTION 6 - JLG CONTROL SYSTEM
6-42 – JLG Lift – 3121290
2/2
(Continued)
D/S JOY. CENTER TAP BAD Resistive joysticks: These faults occur when center tap voltage is not
between 3.08 volts and 3.83 volts. Due to resistor tolerances there is
a +/-.1 volt range around these values where fault may be indicated.
WAITING FOR FSW TO BE OPEN Footswitch closed when platform mode was selected. Can be
reported during power-up sequence.
FOOTSWITCH SELECTED BEFORE
START User attempted to start machine with footswitch engaged.
2/3 Flash code 2/3 indicates problems with boom function selec-
tion. 3
LIFT/SWING LOCKED – JOYSTICK
MOVED BEFORE FOOTSWITCH Platform upper lift or swing was selected before and during foot-
switch closure.
PUMP SWITCHES FAULTY – CHECK
DIAGNOSTICS/BOOM A boom function (lower lift, telescope, basket level, basket rotate,
jib) has both directions selected together.
PUMP SWITCHES LOCKED –
SELECTED BEFORE FOOTSWITCH A platform boom function (lower lift, telescope, basket level, basket
rotate, jib) was selected before key switch or footswitch closure.
PUMP SWITCHES LOCKED –
SELECTED BEFORE AUX POWER A ground boom function (lower lift, telescope, basket level, basket
rotate, jib) was selected before aux power.
l/S JOY. OUT OF RANGE LOW Resistive joysticks: These faults do not occur.
l/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.
l/S JOY. CENTERTAP BAD Resistive joysticks: These faults occur when center tap voltage is not
between 3.08 volts and 3.83 volts. Due to resistor tolerances there is
a +/-.1 volt range around these values where fault may be indicated.
PUMP SWITCHES LOCKED –
SELECTED BEFORE START SWITCH Hydraulic function switch closed before start switch closed.
FOOTSWITCH SELECTED BEFORE
START User attempted to start machine with footswitch engaged.
2/4 Flash code 2/4 indicates steering digital inputs are faulty.
NOT REQUIRED
2/5 Flash code 2/5 indicates a function is prevented due to a cutout. 4
BOOM PREVENTED – DRIVE
SELECTED A boom function is selected while a drive function is selected and
drive cutout is configured to prevent simultaneous drive & boom
operation.
DRIVE PREVENTED – ABOVE ELEVA-
TION Drive is selected while above elevation and drive cutout is config-
ured to prevent drive.
DRIVE PREVENTED – BOOM
SELECTED Drive is selected while a boom function is selected and drive cutout
is configured to prevent simultaneous drive & boom operation.
DRIVE PREVENTED – TILTED &
ABOVE ELEVATION Drive is selected while tilted and above elevation and tilt is config-
ured to cutout drive.
JIB SWING PREVENTED – IN 1000#
MODE User is trying to jib swing in 1000# mode, which is not allowed.
CAN DONGLE ATTACHED –
HYDRAULICS NOT RESTRICTED System allows user to operate all hydraulics with very limited restric-
tions.
MODEL CHANGED – HYDRAULICS
SUSPENDED – CYCLE EMS User changed model number using analyzer. User must cycle power
before hydraulics system will be active again. 11
BACKUP BLAM COMMUNICATIONS
ACTIVE Serial backup communications link to BLAM module is active
Table 6-6. Help Fault Codes, Displayed Faults, and Descriptions
Flash Code Fault Displayed on Analyzer Description Priority