44
0576-M001-0
RAV 1400 A - RAV 1400 AP
RAV 1400 B - RAV 1400 BP
9
9.
PROBLEMS
Some possible problems which may arise while using the lift are listed here below. Ravaglioli declines all responsibility for damages to people,
animals and objects caused by unauthorized staff. Moreover, if faults occur you are advised to contact the technical service assistance to
receive advice and information on how to carry out work and/or adjustments in maximum safety conditions, thus avoiding the risk of causing
damages to people, animals and objects.
Turn the main switch to “0” and lock in case of emergency and/or maintenance to the lift (RAV 1400 A - RAV 1400 B).
Technical assistance is required. Intervention by others prohibited.
PROBLEM
CAUSE
SOLUTION
Machine not working
a) Mains switch in “0” position
a) Turn to position “I”.
b) Transformer fuse or general
b) Replace used fuses.
protective fuses broken.
If a fuse breaks again, find the
cause of the problem.
c) Electric system faulty.
c) Check efficiency, components and
connections (push buttons, solenoid
starter, heat detector, transformer).
Machine carries out rise
a) Descent solenoid valve faulty.
a) To lower the platform, see section 7.1.
movement but not descent
b) Obstruction under platform.
b) Press rise button.
Remove obstruction.
Descent is extremely slow
a) The capacity regulating valve is not
a) See “Maintenance” section
working properly.
The motor is working
a) The descent solenoid valve is
a) See “Maintenance” section.
properly but the lift does
blocked in open position.
not rise
b) Pump suction filter blocked.
b) Clean filter.
The motor is working
a) The descent solenoid valve
a) See section on “Maintenance”
properly but the rise speed is
is partially open.
extremely slow
b) Pump suction filter
b) Clean filter.
partially blocked.
c) Pump used or damaged.
c) Replace pump.
d) Manual descent valve
d) Restore valve seal.
partially open.
The pump does not prime
a) Compressed air line closed or
a) Make sure compressed air is
obstructed
delivered to the pump.
The pump blocks
a) Insufficient air pressure.
a) Make sure the pump feed pressure
under load
(compressed air) is between 2.8 and 10 bar.
b) Air filter dirty or clogged.
b) Clean or replace the air filter.
The pump works properly
a) Oil leakage in the main
a) Check for oil leakage and repair,
but the oil does not reach
hydraulic system.
if necessary.
proper pressure
b) Pump leakage.
b) Check for pump leakage and return
it to the Manufacturer for servicing.
c) Insufficient oil level.
c) Check for proper oil level and top up,
if necessary.
The pump does not reach
a) Insufficient air pressure.
a) Make sure the pump feed pressure
the max. pressure
(compressed air) is between 2.8 and 10 bar.
b) Inner safety valve not properly set
b) Contact the Manufacturer.
c) Oil leakage in the main
c) Check for oil leakage and repair.
hydraulic system.
if necessary.
The pump reaches
a) Excessive load.
a) Reduce load.
proper pressure but the
b) Incorrect oil circulation.
b) Make sure tubes are not throttled
load does not move
and cylinder is not damaged.
The piston moves without
a) Oil leakage in the main
a) Check for oil leakage and repair,
pressing the "RELEASE"
hydraulic system.
if necessary.
pedal
b) Pump faulty
b) Check for pump leakage and
contact the Manufacturer
Insufficient pump capacity
a) Insufficient air pressure.
a) Make sure the pump feed pressure
when max. pressure is reached
(compressed air) is between 2.8 and 10 bar.
b) Air filter dirty or clogged.
b) Clean or replace the air filter.
c) The tank has not been bled.
c) Bleed the tank.
