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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
Machine not working.
Machine carries out rise
manoeuvre but not
descent.
Descent is extremely
slow.
The motor turns but the
lift does not rise.
The motor turns but the
rise speed is extremely
slow.
Cannot lift nominal load
capacity.
Platforms not
synchronised.
Release cylinders not
working.
Safety pawl not working.
RAV518T - RAV518TI
RAV518AAT - RAV518DC
CAUSE
a)
Mains switch in “0” position
Transformer fuse or general protective
b)
fuses broken.
Fault in electrical system
c)
Safety pressure switch activated due to
a)
obstruction beneath footboard.
Safety pressure switch damaged or
b)
command system working badly.
Descent solenoid valve faulty.
c)
d)
Obstruction beneath footboard P1.
a) The capacity regulating valve is not
working properly.
a)
The solenoid descent valve is blocked in
the open position.
Suction pump filter blocked.
b)
a)
The solenoid descent valve is partially
open.
Suction pump filter partially blocked.
b)
c)
Worn or damaged pump.
d)
Manual descent valve partially open.
a)
Calibrating valve faulty.
Worn or damaged pump.
b)
Faulty alignment valve.
a)
Worn gaskets in hydraulic cylinders.
b)
a)
Faulty solenoid release valve.
Worn or damaged release cylinder gasket.
b)
a) Faulty release cylinder.
TECHNICAL SERVICE STAFF REQUIRED
a)
Turn to position “I”.
Replace used fuses. If a fuse goes again,
b)
find the cause of the problem.
Check efficiency, components and
c)
connections (push buttons, solenoid
starter, heat detector, transformer).
Press rise button until the footboards go
a)
into mechanical stop. Remove obstruction.
To complete descent, press descent button
and fit pin A inside the control unit.
b)
To lower the footboards, see section 6.1.
Press the rise button until the footboards
go into mechanical stop. Remove
c)
d)
obstruction.
a) See “Maintenance” section.
a)
See “Maintenance” section.
Clean filter.
b)
a)
See section on “Maintenance”.
Clean filter.
b)
c)
Replace pump.
d)
Restore valve seal.
a)
Request dealer assistance.
Check pump efficiency and replace if
b)
necessary.
Check that tap R (fig.15) is closed. Clean
a)
valve if necessary and proceed as
described in section 4.12.
Replace.
b)
a)
Check that the solenoid valve reel is
working properly and clean the solenoid
valve.
Replace gasket.
b)
a) See above.
0579-M020-2
Intervention by others prohibited
SOLUTION
53
53
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