GARO TFA4500-3D, User Manual

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USER’S MANUAL
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25
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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 2