24
system
desk
motor,
limiy
switches
and
control
panel
operate
properly
must
be
carried
out
by
skilled
electricians.
Oil
Empty
the
oil
tank
and
change
the
hydraulic
oil.
Chapter
10
–Trouble
Shooting
A
list
of
possible
troubles
and
solutions
is
given
below
TROUBLE
POSSIBLE
CAUSE
SOLUTION
The
lift
does
not
work
The
main
switch
is
not
turned
on
Turn
the
switch
on
There
is
no
power
Check
Power
on
to
the
restore
if
necessary
The
electrical
wires
are
disconnected
Replace
Fuses
are
blown
Replace
The
lift
does
not
raise
The
motor
direction
of
rotation
is
not
correct
Interchange
the
two
phases
on
the
main
switch.
The
oil
in
the
hydraulic
unit
is
not
sufficient.
Add
some
hydraulic
oil
The
UP
button
is
faulty
Check
UP
button
and
connection
for
proper
operation.
Replace,
if
needed.
The
maximum
height
limit
switch
is
faulty.
Check
the
switch
and
relevant
connection
for
proper
operation.
Replace,
if
needed.
The
lowering
solenoid
valve
does
not
close
Check
and
clean,
if
dirty,
or
replace,
if
faulty.
The
suction
pump
filter
is
dirty
Check
and
clean
if
needed.
The
lifting
capacity
is
not
sufficient
The
pump
is
faulty
Check
the
pump
and
replace,
if
needed
Oil
leakages
in
hydraulic
circuit
Check
the
circuit
for
any
leakage
The
lift
does
not
lower
when
the
DOWN
button
is
pressed
The
lowering
solenoid
valve
does
not
work
properly
Verify
if
it
is
powered
and
check
magneto
for
damage
(replace
if
disconnected
or
blown)
Safety
solenoid
valve
is
jammed
Verify
if
it
is
powered
and
check
magneto
for
damage
(replace
if
disconnected
or
blown)
The
DOWN
button
is
faulty
Replace
the
DOWN
button
Carriages
do
not
stop
in
standing
position
The
lowering
and
solenoid
valves
stay
opened.
Verify
that
solenoid
valve
sliders
are
not
blocked
Leakage
in
the
hydraulic
pipelines.
Check
connections
for
proper
tightening
and
tubes
for
damage(replace
if
damaged)
Hydraulic
cylinders
are
faulty
Check
and
replace
if
needed.
The
lift
does
not
lower
smoothly
Presence
of
air
in
the
hydraulic
system
Bleed
the
hydraulic
system.
Lifting
is
not
synchronized
Leakages
or
presences
of
air
into
hydraulic
circuit
Bleed
the
hydraulic
system
The
lift
does
not
stop
at
safety
The
safety
height
limit
switch
Check
the
limit
switch
and