JLG 601S Service Manual User Manual
Page 191
SECTION 6 - JLG CONTROL SYSTEM (ADE)
3120866
– JLG Lift –
6-15
2/3
Flash code 2/3 indicates problems with boom function selection.
3
LIFT/SWING JOYSTICK FAULTY
The lift or swing joystick center tap is out of valid range, or the wiper
is wire-off.
LIFT/SWING LOCKED -
JOYSTICK MOVED BEFORE
EMS/FSW
Platform upper lift or swing was selected before and during foot-
switch closure.
PUMP POT FAULTY
The pump pot is open-circuit; all platform boom functions except
upper lift & swing will run at creep.
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 EMS/FSW
A platform boom function (lower lift, telescope, basket level, basket
rotate, jib) was selected before key switch or footswitch closure.
PUMP SWITCHED LOCKED -
SELECTED BEFORE EMS
A ground boom function (lower lift, telescope, basket level, basket
rotate, jib) was selected before key switch.
SWING/LIFT JOYSTICK FAULTY
The swing joystick center tap is out of valid range, or the wiper is
wire-off.
2/4
Flash code 2/4 indicates that steering digital inputs are faulty.
NOT REQUIRED
2/5
Flash code 2/5 indicates that 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
ELEVATION
Drive is selected while above elevation and drive cutout is configured
to prevent drive.
DRIVE PREVENTED - BOOM
MOVEMENT 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 configured
to cutout drive.
BOOM PREVENTED – FUNCTION
CUTOUT ACTIVE
A boom function is selected while function cutout is active and con-
figured to cutout boom functions.
BOOM & DRIVE PREVENTED-
FUNCTION CUTOUT ACTIVE
Drive or a boom function is selected while function cutout is active
and configured to cutout all functions.
2/7
Flash code 2/7 indicates that the accelerator input is faulty.
NOT REQUIRED
2/8
Flash code 2/8 indicates that the hydraulic filter is being bypassed.
5
RETURN FILTER BYPASSED
Hydraulic return filter clogged
CHARGE PUMP FILTER
BYPASSED
Charge pump filter clogged
3/1
Flash code 3/1 indicates that a contactor did not close when energized.
NOT REQUIRED
Table 6-2. Help Fault Codes, Displayed Faults, and Descriptions - Prior to S/N 66939