AA4C AA-2PFP45 - Table 6: Common Problems and Solutions

USER’S MANUAL
Problem
Possible Cause
Solution
Burnt fuse
The lift does non rise when the
Line current does not arrive
Replace fuse
pushbutton is pressed
Malfunction in the electric plant:
Connect again
(motor does not run)
-Broken limit switch
Call Service Center
-burnt motor
Not enough oil
Top un oil level
The lift does non rise when the
Check electric connections or change
Drain solenoid valve opened
pushbutton is pressed
it
Max pressure valve working
(motor runs)
Take load down
Leaks in the hydraulic circuit
Repair the hydraulic circuit
Lift continues to rise after having re-
Faulty pushbutton
Unplug the lift and call Service Cen-
leased the up pushbutton
ter
Foreign object
Remove object
Solenoid valve blocked
Change it (call Service Center)
Malfunction in the electric plant
Lift does not descend
Call Service Center
Carriages still lean on security de-
Make the correct descent sequence
vices
Repair the hydraulic circuit damage
Block valves have tripped
The lift does not rise to the maximum
Oil is not enough
Add oil into the power unit oil tank
height
After having released the up pushbut-
Drain valve dose not close because it
At the same time set the rise and de-
is dirty
scent movements, to clean the valve
ton, the lift stops and lowers slowly
Defective drain valve
Change (call Service Center)
The power unit motor overheats
Motor malfunction
Call Service Center
Wrong voltage
Check voltage
Power unit pump is noisy
Dirty oil
Change oil
Wrong assembling
Call Service Center
Damaged gaskets
Change the damaged gaskets
Oil leakage from cylinder
Clean all parts
Dirt in the plant
Check the valves are not damaged
Table 6
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