12
ー 15 ー
Trouble Shooting
Do not operate lift if you suspect that there is a malfunction.
Contact your supplier.
Symptom
〈Motor does not rotate〉
・Thermal Relay is disconnected
・Contacting point of magnet
switch is burnt
・Power is single phase
・Electric circuit is cut off
〈Motor rotates〉
・Roller at bottom of link is stuck
with foreign objects
・Lack of oil
・Suction Filter is clogged
・Gear Pump does not take in oil
・Oil leak from pressure oil pipe
・Oil leak from Seal of Cylinder
・Lowering Stop Hook is engaged
・Roller at bottom of link is stuck
with foreign objects
・Control Cable is cut or became
longer
・Air pressure is not adjusted to
0.5MPa
・The lowering ≦0.5mm/5 mitutes
is within tolerances
・Oil leak from Lowering Valve
・Oil leak from Check Valve
・Oil leak from Seal of Cylinder
・Oil leak from pipelines
・Hand Control Lowering Valve is
loosen
・Lack of lubrication at bearing
・Wear of the roller at link
・Lack of Hyd. Oil in Cylinder
Solve the problem and then reset
Solve the problem and then replace
magnet switch
Check the voltage and solve the
problem
Repair the cut off
Remove foreign objects
Fill the oil
Clean or replace Suction Filter
Replace Gear Pump
Tighten joints or replace the parts
Replace the Seal
Lift up Drive-on Plates to release
Remove foreign objects
Adjust or replace the Cable
Check if air supply is more than
0.5MPa and adjust air pressure at
Air Filter Regulator to 0.5MPa
Contact supplier if lowering is more
than tolerance
Clean up or replace the Valve
Replace seals
Replace the Seal
Find leaking spot and repair the
Shut off the Valve with L-shape
Hook which is attached
Lubricate
Replace roller
Fill the oil and lift up to top without load
Lift does not rise
Natural Lowering
Lift does not lower
Noise
Possible Cause
Action
