28
VIII. TROUBLE SHOOTING
TROUBLE
CAUSE
REMEDY
Motor does
not run
1. Button does not work
2.Wiring connections are not in good
condition
3. Motor burned out
4. AC contactor burned out
5. Height limit switch is damaged
1.Replace button
2.Repair all wiring connections
3.Repair or replace motor
4.Replace AC contactor
5.Replace
Motor runs
but the lift is
not raised
1.Motor runs in reverse rotation
2. Release valve in damage
3. Gear pump in damage
4.Relief valve or check valve in damage
5.Low oil level
1.Reverse two power wire
2.Repair or replace
3.Repair or replace
4.Repair or replace
5.Fill tank
Lift does not
stay up
1. Release valve out of work
2 Relief valve or check valve leakage.
3.Cylinder or fittings leaks
Repair or replace
Lift raises
too slow
1.Oil line is jammed
2.Motor running on low voltage
3. Oil mixed with Air
4.Pump leaks
5.Overload lifting
1.Clean the oil line
2.Check electrical system
3. Fill tank
4.Replace Pump
5.Check load
Lift cannot
lower
1. Safety device are in activated
2. Release valve damaged
3. Air Cylinder damaged
4. Oil system is jammed
1. Release the safeties
2. Replace or repair
3.Replace the cylinder
4. Clean the oil system
