Lincoln Electric Pro-MIG 175, Operator'S Manual, Page: 31 / 36

F-1 F-1
WIRING DIAGRAMS
W
IR
IN
G
D
IA
G
R
A
M
W
ARNING
HIG
H VOLTAGE
can kil
l
O
nly qu
ali
fied perso
ns sh
ould inst
all,
us
e or
service
th
is mach
in
e.
Do not ope
rate wit
h
co
ve
rs
r
em
ov
ed
.
Di
sc
on
nec
t inpu
t po
we
r by
u
nplug
ging po
we
r co
rd be
fo
re se
rvicing
.
D
o n
ot
to
uc
h
el
ec
tr
ic
al
ly
li
ve
pa
rt
s
B
M2
01
43
ELECTRICAL S
Y
M
B
OLS
P
ER E153
7
CAVITY NUMB
ERING S
E
QUENC
E
( COM
PONENT
SID
E OF
BOARD )
539
541
213
GUN TR
IGGER
THERMO
ST
A
T
20
8
5K
WIRE SPEED
R2
(W
)
(B
)
N.
C.
20
9
214 21
1
WINDI
NG
24V
AUXILIAR
Y
F
AN MOT
OR
H2
541
204
203
20
9
20
8
53
9
213
21
4
1
2
34
LATCH
5
6
78
91
0
12
3
4
5
6
7
89
10
GA
S
SOLENOID
CONTROL
P.C. BO
ARD
J1
CR
1
H1
H2
LS1
H2
H2
D3
20
4
204
204
20
3
20
3
20
3
C1
40V
u
20
3
20
4
-
+
G
UN CAB
L
E
CONDUCT
O
R
BL
O
C
K
TO
WO
R
K
T1
N.B.
N.A.
X1
20
2
X2
S2
SEL
ECT
OR
SWITCH
OUT
PUT
CHOK
E
X4
X5
+
H1
N.A.
DIODE
S D1,
D
3
,D
5 & D
7
ARE MOUNTED
ON THE OUT
SID
E H
EAT
SINK.
D1
D5
D2
D6
D7
D4
D8
X3
X6
204
204
203
20
3
H2
N.O.
2
0
8V/6
0
H
Z
A
H3
23
0V/6
0HZ
A
N.
C.
A
H3
C
UST
OM
ER
VOLTA
GE R
ECONN
ECTION FOR DUAL VOLTA
G
E
M
ACHINE
TO EARTH
GROUND
PER NATI
ONAL, LO
CAL
OR OTHER
APPLICA
BLE
EL
ECTRICAL CODE
S.
G
N.
D.
N.
D.
211
THERMO
ST
AT
+
-
MACHINE
S AR
E SHI
PPED FROM F
ACT
ORY CONNECT
ED FOR 2
3
0V A
S
SHO
WN. TO CON
NECT W
ELDER FOR
2
0
8V INPUT,
D
ISCONNECT W
ELDER FROM INPUT P
O
WER, REMO
VE CASE
SID
E, REM
OVE LE
AD M
ARKED "H
1"
FROM CR
1.
REMO
VE TAPE
SECURING
H3 TO
LEAD
SL
EEVING
AND CON
NECT H
3
TO
CR
1.
I
NSULAT
E
UN
US
ED H1
LEAD FOR 3
0
0V WITH EL
ECTRICAL TA
PE AND S
ECURE TO LE
AD SL
EEVING. REINST
ALL
CASE
SID
E BEFOR
E CONNECTING INPUT PO
W
ER. RECONNECTION TO
2
3
0V IS RE
VERSE OF
ABO
VE PROC
EDURE.
SEE INS
TRU
CTION MANUAL FOR
DET
AILS.
H1
(23
0V)
H3
(20
8V)
LE
AD COLOR
CODE:
B-
BL
AC
K
W-
WHIT
E
(MOUNT
ED TO
SEC. COI
L)
(MOUNT
ED TO
DIODE HE
AT
SIN
K)
WIRE FE
ED
MOTOR
CIRC
UIT
BREAKER
N.B.
DIODE
S D2,
D4,
D6 & D
8
ARE MOUNTED ON THE INSIDE
HEAT
SIN
K, WHICH
IS CLOS
EST TO THE C
ENT
ER
PAN
EL.
CASE
GROUND
ING
STUD
N.C.
COMP
ONENT
VI
EWED FROM RE
AR.
S1 ON-O
FF
SWITCH
93
,00
0
f
N.
D.
BOLT
ED
ALUMIN
UM
CONNECTIONS RE
QUIRE T1
2
8
3
7 JOINT
COMP
OUND
(DOW CORNI
NG 3
4
0) WHEN RE
ATTACHING.
J1
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The
specific diagram for a particular code is pasted inside the machine on one of the enclosure panels.
Pro-MIG 175 WIRING DIAGRAM
Pro-MIG 175