–44–
–44–
No.
Description
of
error
detected
Cause
Item
to
be
checked
or
corrective
measure
302
Fall
detection
switch
failure
(When
safety
switch
works)
•
W
he
n
fa
ll
de
te
ct
io
n
sw
itc
h
is
in
pu
tte
d
in
th
e
st
at
e
th
at
the
power
is
turned
ON.
•Chec
k
whet
her
the
m
achine
head
is
tilt
ed
wit
hout
turning
O
FF
the
power
switch
(sewing
machine
operation
is
prohibited
for
safety
sake). •Check
whether
the
fall
detection
switch
cord
is
caught
in
the
sewing
machine
or
the
like
and
has
broken.
•Check
whether
the
fall
detection
switch
lever
is
caught
in
something.
343
Bobbin
thread
remaining
amount
sensor
unit
trouble
•When
the
position
of
detection
rod
of
AE
device
is
out
of
the
home
position.
•C
he
ck
w
he
th
er
t
he
d
et
ec
tio
n
ro
d
of
A
E
de
vi
ce
is
r
et
ur
ne
d
to
the
proper
position.
•Check
whether
function
setting
No.
57
is
wrongly
set.
•Check
whether
connectors
(CN
2
and
CN
23)
of
AE
device
are
loosened
or
disconnected.
•Check
whether
cord
of
AE
device
is
broken
due
to
pinching
of
cord
or
the
like
by
machine
head.
8
0
Solenoid
short-circuit
•
When
the
short-circuited
solenoid
is
desired
to
be
driven.
•Check
whether
the
solenoid
is
short-circuited.
8
Overvoltage
•
When
voltage
upper
than
guaranteed
one
is
inputted.
•
When
200V
is
inputted
for
00V
setting.
•C
he
ck
w
he
th
er
th
e
ap
pl
ie
d
po
we
rv
ol
ta
ge
is
h
ig
he
rt
ha
n
th
e
ra
te
d
voltage
+
(plus)
0%
or
more.
•C
he
ck
w
he
th
er
00
V/
20
0V
c
ha
ng
eo
ve
r
co
nn
ec
to
r
is
s
et
b
y
mistake. Check
whether
fuse
or
regenerative
resistance
is
broken.
In
the
above
cases,
POWER
circuit
board
has
broken.
8
3
Low
voltage
•
When
voltage
lower
than
guaranteed
one
is
inputted.
•
When
00V
is
inputted
for
200V
setting.
•Internal
circuit
is
broken
due
to
applied
overvoltage.
•Check
whether
the
votage
is
lower
than
the
rated
voltagw
－
(minus)
0%
or
less.
•Check
whether
00V/200V
changeover
connector
is
set
by
mistake. •Check
whether
fuse
or
regenerative
resistance
is
broken.
906
Operation
panel
transmission
failure
•
Disconnection
of
operation
panel
cord
•
Operation
panel
has
broken.
•C
he
ck
th
e
op
er
at
io
n
pa
ne
lc
on
ne
ct
or
(
C
N
34
,C
N
35
)
fo
r
lo
os
e
connection
and
disconnection.
•C
he
ck
w
he
th
er
th
e
op
er
at
io
n
pa
ne
lc
or
d
ha
s
br
ok
en
s
in
ce
th
e
cord
is
caught
in
the
machine
head
or
the
like.
924
Motor
driver
failure
•
Motor
driver
has
broken.
930
Encoder
failure
•
When
the
motor
signal
is
not
properly
inputted.
•C
he
ck
th
e
m
ot
or
s
ig
na
lc
on
ne
ct
or
(
C
N
38
,C
N
39
)
fo
r
lo
os
e
connection
and
disconnection.
•Check
whether
the
motor
signal
cord
has
broken
since
the
cord
is
caught
in
the
machine
head
or
the
like.
93
Motor
hole
sensor
failure
939
Stepping
motor
origin
retrieval
error
•
W
he
n
th
e
or
ig
in
p
os
iti
on
o
ft
he
s
te
pp
in
g
m
ot
or
is
n
ot
detected
at
the
time
of
turning
ON
the
power
.
•Check
whether
the
detecting
connector
(CN
39)
is
wrongly
inserted. •C
he
ck
t
he
d
et
ec
tin
g
co
nn
ec
to
r
(C
N
3
9)
f
or
l
oo
se
connection
and
disconnection.
