Ravaglioli RAV4352 Manual página 102

10. PROBLEMS
Some possible problems which may arise while using the lift are listed below. The Manufacturer 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.
PROBLEMS
No operation.
Up movement is possible, but
down movement is impossible.
Down movement is possible, but
up movement is impossible.
Lowering speed is very low.
The motor turns regularly but the
lift does not rise, or rises slowly.
The lift cannot lift the nominal
capacity.
The release cylinders do not work. a)

CAUSES
a) Main switch set to "0".
b) Disconnected fuses.
c) Ropes loosening/breakage limit switch
tripped due to the breakage of a rope.
d) Ropes loosening/breakage limit switch
tripped due to the loosening of a rope.
a) Ropes loosening safety limit switch tripped
due to an obstacle under the platform, or
due to the loosening of a rope.
b) Down solenoid valve EV1 faulty.
c) Solenoid valve EV3 faulty (catches).
d) Limit switch FC5 faulty (dangerous height).
a) Motor heat probe disabled.
a) The flow controlvalve does not work properly
b) Clogged pipe.
a) Descent solenoid valve jammed in open
position.
b) Pump intake filter clogged.
c) Piston gasket damaged or worn.
d) Pump worn or damaged .
a) Faulty calibration valve.
b) Pump worn or damaged.
Release solenoid valve does not work
properly.
b) Release cylinder gasket worn or damaged.
0717-M020-7
TECHNICAL SERVICE REQUIRED
do not attempt to do the job yourself
a) Set switch to "1".
b) Change blown fuses. If a fuse is blown
again, find the cause leading to the
inconvenience.
c) Change the rope. Contact dealer's technical
service.
d) Adjust rope with the special nuts positioned
onto post upper side. Contact dealer's
technical service.
a) Check ropes adjustment. Press UP
pushbutton until all ropes are tensioned.
Eliminate loosening causes. Carry out the
down movement.
b) To let platform move down, work manual
downstroke valve with the special key. To
remove and carry out the maintenance
operations on the down solenoid valve, refer
to Section MAINTENANCE.
c) Check solenoid valve correct operation and,
if necessary, clean it (see Cleaning subsec-
tion).
Check air pipe and electrical cable
connection.
d) Check for FC5 cable correct connection
(refer to the Wiring Diagram).
a) Wait for probe closing.
a) Clean the valve (see § Valve cleaning)
b) Clean piston valve.
a) Clean the solenoid valve (see § Valve
cleaning).
b) Clean the filter.
c) Replace the gasket.
d) Check pump for proper operation and replace
it if needed.
a) Request assistence from retailer's technical
service.
b) Check that the pump is working properly and
replace if necessary.
a) Check that the spool of the solenoid valve is
working and clean the solenoid valve.
b) Replace the gaskets.
REMEDIES
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