FY-TECH FY-4200/2E - Comprehensive Troubleshooting Guide; Problem Resolution Table

P
r
ob
l
e
m
Probab
le
Cau
se
Re
med
y
A
r
c
c
a
n
n
ot
weld
,
i
n
c
o
mple
t
e
f
u
sio
n
1)N
ot
e
n
oug
h
p
o
w
e
r
ph
a
s
e
.
2
)T
oo
l
o
w
weld
ing
v
ol
tage.
1)Ch
e
c
k
po wer
s
o
urc
e.
No
wi
r
e
feed
Ex
ce
s
s
i
v
e
s
pat
ter
1)
D
ri
ve
r
ol
l
gr
oov
e
d
ose
not
li
ne
u
p
wi
th
w
ir
e
gu
i
d
e.
2)
Obs
tr
u
ct
io
n
in
w
ir
e
gu
id
e
.
3)
D
ri
ve
r
ol
l
pr
es
s
ur
e
to
o
h
i
g
h
.
4)
Inc
or
rec
t
w
ire
siz
e.
5)
Ob
s
tr
uc
t
io
n
in
wi
r
e
i
n
le
t
g
u
id
e
o
r
con
ta
ct
t
ip
.
6)
D
i
rty
or
b
ad
q
ua
nti
ty
w
el
di
ng
w
ire
.
7
)
Pr
ess
wi
re
d
evi
ce
p
re
ss
u
re
t
oo
lo
w
.
1
)A
lig
n
i
n
g
dr
i
v
e
r
o
l
l
a
nd
w
i
re
g
u
id
e.
2)C
le
ar
ob
s
t
r
uc
tio
n
in
wi
r
e
gu
id
e
o
r
re
pl
a
ce
i
t
i
f
n
ece
ss
a
ry
.
3
)
R
e
adj
us
t
dri
v
e
ro
ll
p
r
es
sur
e.
4
)R
epl
a
c
e
w
ir
e
o
r
wi
r
e
gu
ide
.
5)C
le
a
r
ob
s
tr
uc
t
io
n
i
n
gu
n
con
ta
c
t
ti
p
o
r
li
ner
.
6)
U
se
g
oo
d
q
ua
nti
ty
we
ld
i
n
g
w
i
re
.
7
)
R
e
adj
us
t s
cr
e
ws
.
1
)Wi
r
e
f
ee
d s
p
eed
t
oo
hi
g
h.
2)C
o
nta
ct tip
da
m
a
ged
.
1) S
e
lect
low
e
r
w
ir
e
fe
ed sp
ee
d
.
2)
Rep
lace
c
on
t
ac
t t
ip.
S
mall
c
a
v
i
resul
t
i
n
g
from
g
a
s
p
ockets
in
w
e
l
d
m
e
tal
t
ies
or
h
o
l
e
s
1)Insufficient shielding
gas
at welding
arc.
2)Regulator\
flowmeter
damaged.
3)Contact
tip
damaged.
4)Leakage, outside
gas
mix
with
shielding gas.
W
el
di
ng
ar
c
no
t
sta
bl
e
1
)
Wel
din
g
w
ire
d
irt
y.
2)B
ad
co
nt
ac
t
of
w
o
rk
c
l
am
p
.
3
)Wr
o
ng
s
i
ze
g
u
n
li
n
er
o
r
c
on
t
a
ct
t
ip
,
or
c
on
t
act
t
i
p
w
o
r
n.
1)
U
s
e
c
l
e
an
,
d
ry
wel
di
ng
wire
.
2
)C
o
n
ne
c
t
wo
r
k
c
l
a
mp
t
o
g
et
g
oo
d m
etal
to
m
e
tal
as
c
ont
a
c
t.
3)R
epla
ce
c
on
t
a
ct
t
i
p.
Low
o
r
u
n
s
t
a
b
l
e
w
ire
speed
1)D
istor
t
ed
we
ld
in
g
wire.
2)Obs
t
ru
c
ti
on
i
n
gun
c
o
nt
act
t
ip
or
li
n
e
r
.
1)E
l
i
m
i
nate
p
i
c
kup
o
f
d
is
t
ort
ed
w
e
l
di
ng
wire
f
r
om
feede
r
o
r
lin
e
r
,
or
rea
d
ju
s
t
d
ri
ve
roll
p
r
e
ssure.
2)R
epl
a
c
e
c
ont
a
ct
tip
o
r
li
n
er.
N
o
we
ld
ou
tpu
t
1)
Mai
n
t
ran
sf
or
mer
ov
erh
e
a
ts
,o
v
er
hea
t
p
ro
tec
tion
wo
r
ki
ng.
2)
Fu
s
e
br
ok
e
n.
1
)W
ai
t
15
-
3
0
m
ins
fo
r
un
it
t
o
co
ol
.
2)
Re
pl
ac
e
fu
se
.
3
)G
un
t
r
i
g
g
er
damag
ed
o
r
pl
u
g
wor
n.
3)R
ep
l
ac
e
gun
t
ri
g
ge
r
o
r
p
l
u
g
2
)Se
lect
h
i
g
h
e
r
v
o
ltag
e
r
a
n
g
e
.
1
)
I
n
c
r
e
a
se
flow
o
f
s
h
i
eldin
g
g
a
s
a
t
regulat
o
r
/
f
l
o
w
meter.
2)R
e
p
l
a
c
e
regula
t
o
r
/
f
l
o
wmeter
.
3
)
Replace
c
o
n
t
a
c
t
tip.
4)Ch
e
c
k
g
a
s
hoses
f
o
r
l
eaks.
9、Troubleshooting Guide For Semiautomatic Welding Equipment
Page.29