JLG 660SJ Service And Maintenance Manual page 269

Fault Flash Communicated (Displayed on
Code Analyzer) Fault
D/S JOY. OUT OF RANGE HIGH
D/S JOY. CENTER TAP BAD
WAITING FOR FSW TO BE OPEN
2/3
LIFT/SWING LOCKED – JOYSTICK
MOVED BEFORE FOOTSWITCH
PUMP SWITCHES FAULTY –
CHECK DIAGNOSTICS/BOOM
PUMP SWITCHES LOCKED –
SELECTED BEFORE FOOTSWITCH
PUMP SWITCHES LOCKED –
SELECTED BEFORE AUX POWER
LIFT / SWING WITH NO QPROX
l/S JOY. QPROX BAD
l/S JOY. OUT OF RANGE LOW
l/S JOY. OUT OF RANGE HIGH
3121298
Table 6-3. Help Fault Codes, Displayed Faults, and Descriptions
Resistive joysticks: These faults do not occur if the 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.
Inductive joysticks: The trigger points for these faults are dependent on the
centertap voltage reading. These faults will be triggered when the voltage is
more than the centertap voltage plus half the centertap voltage plus 0.3 volts. If
the centertap is at the high end of the range, these faults will be triggered above
4.35 volts. If the centertap is at the low end of the range, these faults will be trig-
gered above 3.8 volts.
Resistive joysticks: These faults occur when the 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 the fault may be indicated.
Inductive joysticks: These faults occur when the center tap voltage is not
between 2.18 volts and 2.70 volts. Due to resistor tolerances there is a +/-.1 volt
range around these values where the fault may be indicated.
Footswitch was closed when platform mode was selected. Can be reported
during power-up sequence.
Flash code 2/3 indicates problems with boom function selection.
Platform lift or swing was selected before and during footswitch closure.
A boom function (lower lift, telescope, basket level, basket rotate, jib) has both
directions selected together.
A platform boom function (lower lift, telescope, basket level, basket rotate, jib)
was selected before key switch or footswitch closure.
A ground boom function (lower lift, telescope, basket level, basket rotate, jib)
was selected before aux power.
This fault only occurs with inductive joysticks. It occurs if the joystick is moved
out of the neutral position with no Qprox sensors active.
These faults only occur with inductive joysticks. They indicate the Q-Prox sensor
is reading above 3.18 volts.
Resistive joysticks: These faults do not occur.
Inductive joysticks: The trigger points for these faults are dependent on the
centertap voltage reading. These faults will be triggered when voltage is less
than centertap voltage minus half the center tap voltage minus 0.3 volts. If cen-
tertap is at high end of the range, these faults will be triggered below 1.05 volts.
If centertap is at low end of the range, these faults will be triggered below 0.79
volts.
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.
Inductive joysticks: The trigger points for these faults are dependent on the
centertap voltage reading. These faults will be triggered when voltage is more
than centertap voltage plus half the centertap voltage plus 0.3 volts. If center-
tap is at high end of the range, these faults will be triggered above 4.35 volts. If
centertap is at low end of the range, these faults will be triggered above 3.8
volts.
– JLG Lift –
SECTION 6 - JLG CONTROL SYSTEM
Description Priority
3
6-19