22
Installation/Operation & Maintenance Manual
HFL4140E 4-POST ALIGNMENT LIFT
Chapter 7 TROUBLESHOOTING
Troubleshooting and possible repairs require
absolute compliance with ALL THE SAFETY
PRECAUTIONS indicated in
Chapter
6
“MAINTENANCE”
and
Chapter 3 “SAFETY”
.
Problem
Possible cause
Solution
The lift does not rise when
the pushbutton is pressed
(motor does not run).
■
Burnt fuse
■
Line current does not arrive
■
Malfunction in the electric plant:
-broken limit switch
-burnt motor
■
Replace fuse
■
Connect again
■
Call Service Centre
The lift does not rise when
the pushbutton is pressed
(motor runs)
■
Note enough oil
■
Drain solenoid valve opened
■
Max. pressure valve working
■
Leaks in the hydraulic circuit
■
Fill up oil level
■
Check manual outlet or change it.
■
Check the load and adjust the
valve
■
Repair the line
Lift continues to rise after
having released the up
pushbutton.
■
Faulty pushbutton.
■
Unplug the lift and call service
center.
Lift does not descent
■
Foreign object
■
Solenoid valve blocked
■
Malfunction in the electric plant
■
Carriages still lean on security
devices
■
Block valves have tripped.
■
Remove object
■
Change it (Call service center)
■
Call service center
■
Make the correct descent
sequence
■
Repair the hydraulic circuit
damage.
The lift does not rise to the
maximum height
■
Oil is not enough
■
Add oil into the power unit oil tank
After having released the up
pushbutton, the lift stops and
lowers slowly
■
Drain valve does not close
because it is dirty.
■
Defective drain valve.
■
At the same time, set the rise and
descent movements, to clean
valve.
■
Change (Call service center)
The power unit motor
overheats
■
Motor malfunction
■
Wrong voltage
■
Call service center
■
Check voltage
Power unit pump is noisy
■
Dirty oil
■
Wrong assembling
■
Change oil
■
Call service center
Oil leakage from cylinder
■
Damage gaskets
■
Dirt in the plant
■
Change the damaged gaskets
■
Clean all parts
■
Check the valves are not
damaged.
Table 3
