4 — MAINTENANCE
4-17
Table 4-3. Troubleshooting Chart (Continued)
Problem Cause Correction
4. ENABLE pushbutton blinks
when pressed.
a. ENABLE pushbutton has been
pressed down for longer than 5
seconds without a function being
selected.
b. Joystick potentiometer out of adjust-
ment (will not return to center).
c. Did not press ENABLE pushbutton
first before moving joystick to for-
ward or reverse drive.
d. Tried to drive forward or reverse and
raise or lower the platform at the
same time.
a. Release ENABLE pushbutton and
press again.
b. Adjust joystick forward/reverse travel
potentiometer for null drive signal
with joystick at center.
c. Release ENABLE pushbutton and
press again before moving joystick.
d. Release ENABLE pushbutton and run
only one function (drive or lift) at a
time.
5. When DOWN function is
selected, lift platform will
not descend.
a. Down valve solenoid or solenoid
wiring faulty.
b. Down valve sticking; does not open.
c. DOWN switch or DOWN switch
wiring faulty.
d. Underguard switches activated
a. Check voltage at down valve sole-
noid. If no voltage, check wiring. If
voltage, exchange solenoids and re-
check function; replace solenoid if
faulty.
b. Repair or replace down valve.
c. Check for lighted DOWN LED when
down switch is engaged. If LED does
not light, signal is not reaching main
controller; repair wire break or re-
place faulty switch.
d. Remove object from underguard or
readjust/replace switches.
6. Alarm is sounding; lift UP
and travel functions stopped
working.
a. Lift vehicle more than 1 degree out of
level.
a. Lower lift platform and drive lift
vehicle to level area.
7. When joystick is moved, lift
vehicle will not travel.
a. Wheels blocked.
b. Free wheel lever in free wheel (tow)
position.
c. Joystick or joystick wiring faulty.
d. Main controller or main controller
signal wiring faulty.
e. Motor controller 24-volt power cable
disconnected.
a. Check wheels for blocking; remove
travel obstacle.
b. Move free wheel lever back to drive
position.
c. Check for lighted travel LED when
joystick is engaged. If travel LED
does not light, travel signal is not
reaching main controller; repair wire
break or replace faulty joystick.
d. Check for output voltage to motor
controller when joystick is engaged.
If travel signal is not present at main
controller, contact Bil-Jax for assis-
tance. If travel signal is not present at
motor controller, repair wire break.
e. Check connection of 24-volt power
cable to motor controller; repair faulty
power cable connection.
