YASKAWA YASNAC 3000G - Page 157

2.
Inspect
for
the
cause
of
the'
control
power
sup¬
ply,
I/O
interface
and
servo
unit,
and
remove,
if
any.
1FU
2
F\J
P'
A
3.
Replace
the
blown-off
fuse
with
new
one.
o
RATED
CURRENT
4.
Depress
POWER
OFF
pushbutton
on
the
op¬
erator's
panel
to reset
the
control
and
then
turn
on
the
power.
WHITE
MARK
WHEN
BLOWN
OFF
5.
If
the
fuse
is
blown
off
again,
consult
the
com
pany.
Fig.
8.3.2
Fuses
of
Servo
Unit
WHITE
MARK
WHEN
BLOWN
OFF
/£
8.4
THERMAL
OVERLOAD
RELAY
OF
SERVO
UNIT
'S'
3.2
2.0
1.0
1.0
Servo
units
for
each
axis
are
provided
with
ther-
mal
overload
relays.
Thermal
overload
relay
will
be
tripped
in
the
following
cases.
•
When
excessively
heavy
cutting
is
commanded.
'
When
excessively
frequent
commands
with
acceleration
and
deceleration
are
given.
•
When
friction
is
produced
excessively
in
the
machine
system.
Correct
the
program
or
check
the
machine
when
it
occured.
Resetting
operation
of
the
thermal
overload
relays
is
as
follows.
+15
VDC
-15
VDC
+24
VDC
+24
VDC
3.2
A
2
A
2
A
5
A
100
VAC
10
A
Fig.
8.3.1
F
uses
of
Composite
Control
Power
Supply
Unit
8.3.2
FUSES
OF
SERVO
UNIT
Two
plug-in
fuses
(
IF
U
and
2FU)
are
mounted
on
the
lower
part
of
the
each
servo
unit.
Small
ca¬
pacity
servo
unit
is
equipped
with
only
1FU.
If
the
fuses of
servo
unit
of
any
axis
are
blown
off,
the
system
becomes
overloaded
(shown
by
alarm
code
"35"),
and
servo
power
supply
is
turned
off.
Reset
the
system
using
the
following
procedure.
When
the
thermal overload
relay
of
servo
unit
of
any
axis
is
tripped,
the
power
supply
for
servo
is
turned
off
and
the
state
of
alarm
code
35
(overload)
occurs.
I.
2.
Wait
until
the
thermal
overload
relay
is
cool¬
ed
so
that
it
can
be
reset.
(Approx.
5
minutes)
In
this
period,
check
fuses
of
each
servo
unit
if
there
is
any
blown
off
fuses.
1.
Check
for
a
blown-off
fuse
which
has
white
mark
at
the
enclosure
window,
and
remove
it,
if
found.
When
the
thermal
overload
relay
ha6
been
trip
ped,
it
will
click
by
depressing
the
RESET
button
(red)
.
However,
the
click
is
usually
killed
by
the
environmental
noise,
so
that take
the
procedure
described
below.
3.
Remove
the
cause
of
overcurrent.
2.
3.
Replace
the
blown-off
fuse
with
new
one.
Set
the
FUNCTION
select
key
to
ALM
and
check
to
see
that
the
alarm
code
"35"
is
dis¬
played.
4.
4.
Depress
RESET
key
on
the
operator's
panel
to
release
the alarm
status.
5.
Depress
POWER ON
pushbutton
to
retrieve
servo
power
supply.
Depress
the
RESET
button
(red)
on
the
ther¬
mal
overload
relay
of
X
axis
servo
unit.
5.
6.
If
any
of
the
fuses
are
blown
off
again,
con¬
sult
the
company.
Depress
RESET
key
on
the
NC
operator's
panel.
If
the
alarm
code
"3
5"
is
diminished
and the alarm
code
"31"
(servo
power
unread-
y)
is
displayed,
it
means
that
the
thermal
over¬
load
relay
for
X
axis
is
tripped.
6.
150
-