4 — MAINTENANCE
4-15
4-6 TROUBLESHOOTING
Table 4-3. Troubleshooting Chart
Problem Cause Correction
1. Control panel LEDs will not
light and audio program
‘Hal’ will not respond.
a. Low voltage*.
b. Master power switch turned off.
c. Emergency stop button is activated
(pushed in).
d. Burned out LED.
e. Two parts of battery connector plug
not mated together.
a. Recharge battery or replace if dam-
aged.
b. Turn on master power switch.
c. Pull out on emergency stop button.
d. Replace LED board.
e. Mate battery connector plug parts
together.
2. Control Panel LEDs will not
turn off.
a. Lift is out of level.
b. Broken or loose wire.
a. Level lift with outrigger jacks or
relocate lift to level surface.
b. Repair or replace wire.
3. When UP switch is selected,
motor runs but unit will not
lift a load.
a. More than 350 lbs. on platform.
b. NO (Normally Open) valve is not
being energized.
c. Emergency lowering valve is open.
d. Mast sections are dirty.
a. Ensure load is 350 lbs. or less.
b. Check voltage at NO valve. If no
voltage, check for loose or broken
wire. If voltage, ensure at least 9 volts
for start solenoid operation. Check
battery and start solenoid. Repair or
replace as needed.
c. Close emergency lowering valve.
d. Clean and lubricate masts with dry
silicone.
4. Masts have excessive sway
when fully extended.
a. Plastic slide blocks are out of adjus-
ment.
b. Plastic guide pegs are out of adjust-
ment.
a. Refer to Slide Block Adjustment in
Section 4-5.
b. Refer to Guide Peg Adjustment in
Section 4-5.
*NOTE: Smart start solenoid will not engage if battery charge drops below 9 volts.
