54
54
0579-M070-0
Î
TECHNICAL SERVICE STAFF REQUIRED
Intervention by others prohibited
8. PROBLEMS
Some possible problems which may arise while using the lift are listed below. Ravaglioli will not accept any responsibility
for damage to people, animals and objects caused by unauthorised staff using the equipment. In the event of faults, you are
advised to contact the technical service department in good time to receive advice about how to carry out work and/or
adjustments in maximum safety conditions, thus avoiding the risk of damage to people, animals and objects.
Turn the main switch to “0” and lock in case of emergency and/or maintenance to the lift
PROBLEM
CAUSE
SOLUTION
Machine not working.
a)
b)
c)
Mains switch in “0” position
Transformer fuse or general protective
fuses broken.
Fault in electrical system
a)
b)
c)
Turn to position “I”.
Replace used fuses. If a fuse goes again,
find the cause of the problem.
Check efficiency, components and
connections (push buttons, solenoid
starter, heat detector, transformer).
Machine carries out rise
manoeuvre but not
descent.
a)
b)
c)
d)
Safety pressure switch activated due to
obstruction beneath footboard.
Safety pressure switch damaged or
command system working badly.
Descent solenoid valve faulty.
Obstruction beneath footboard P1.
a)
b)
c)
d)
Press rise button until the footboards go
into mechanical stop. Remove
obstruction.
To complete descent, press descent
button and fit pin A inside the control
unit.
To lower the footboards, see section 6.1.
Press the rise button until the footboards
go into mechanical stop. Remove
obstruction.
Descent is extremely
slow.
a)
The capacity regulating valve is not
working properly.
a)
See “Maintenance” section.
The motor turns but the
lift does not rise.
a)
b)
The solenoid descent valve is blocked in
the open position.
Suction pump filter blocked.
a)
b)
See “Maintenance” section.
Clean filter.
The motor turns but the
rise speed is extremely
slow.
a)
b)
c)
d)
The solenoid descent valve is partially
open.
Suction pump filter partially blocked.
Worn or damaged pump.
Manual descent valve partially open.
a)
b)
c)
d)
See section on “Maintenance”.
Clean filter.
Replace pump.
Restore valve seal.
Cannot lift nominal load
capacity.
a)
b)
Calibrating valve faulty.
Worn or damaged pump.
a)
b)
Request dealer assistance.
Check pump efficiency and replace if
necessary.
Platforms not
synchronised.
a)
b)
Faulty alignment valve.
Worn gaskets in hydraulic cylinders.
a)
b)
Check that tap R (fig.15) is closed. Clean
valve if necessary and proceed as
described in section 4.12.
Replace.
Release cylinders not
working.
a)
b)
Faulty solenoid release valve.
Worn or damaged release cylinder
gasket.
a)
b)
Check that the solenoid valve reel is
working properly and clean the solenoid
valve.
Replace gasket.
Safety pawl not working.
a)
Faulty release cylinder.
a)
See above.
